| | Contents | |
| | | |
| |
| | Foreword | XIX |
| | Preface | XXIII |
| | List of Contributors | XXV |
| Part I | Introduction, Organometallic Aspects and Mechanism of Homogeneous Hydrogenation | |
| 1 | Rhodium Luis A. Oro and Daniel Carmona | 3 |
| 1.1 | Introduction | 3 |
| 1.1.1 | Monohydride Hydrogenation Catalysts | 4 |
| 1.1.2 | Dihydride Hydrogenation Catalysts | 4 |
| 1.2 | The Early Years (19391970) | 5 |
| 1.3 | The [RhH(CO)(PPh3)3] Catalyst | 6 |
| 1.4 | The [RhCl(PPh3)3] Complex and Related Catalysts | 8 |
| 1.5 | The Cationic[Rh(diene)(PR3)X]+ Catalysts | 11 |
| 1.6 | Enantioselective Rhodium Catalysts | 14 |
| 1.6.1 | Hydrogenation of Alkenes | 14 |
| 1.6.2 | Hydrogenation of Ketones | 19 |
| 1.6.3 | Hydrogenation of Imines | 20 |
| 1.6.4 | Mechanism of Rhodium-Catalyzed Enantioselective Hydrogenation | 21 |
| 1.7 | Some Dinuclear Catalyst Precursors | 26 |
| 1.8 | Concluding Remark | 26 |
| | Abbreviations | 26 |
| | References | 27 |
| 2 | Iridium Robert H. Crabtree | 31 |
| 2.1 | Introduction | 31 |
| 2.2 | Historical Aspects | 31 |
| 2.3 | Organometallic Aspects | 36 |
| 2.4 | Catalysis | 39 |
| 2.4.1 | Enantioselective Versions of the Iridium Catalyst | 39 |
| 2.4.2 | Mechanism | 40 |
| 2.4.3 | Practical Considerations | 42 |
| | Acknowledgments | 43 |
| | Abbreviations | 43 |
| | References | 43 |
| 3 | Ruthenium and Osmium Robert H. Morris | 45 |
| 3.1 | Introduction | 45 |
| 3.2 | Ruthenium | 46 |
| 3.2.1 | The First Catalysts for Alkene Hydrogenation: Mechanistic Considerations | 46 |
| 3.2.2 | Synthesis of Ruthenium Precatalysts and Catalysts | 50 |
| 3.2.3 | Dihydrogen Complexes and Non-Classical Hydrogen Bonding in Catalysis | 52 |
| 3.2.4 | Toward the Reduction of Simple Ketones, Nitriles, Esters and Aromatics with Monodentate Phosphine Systems | 55 |
| 3.2.5 | Enantiomeric Hydrogenation of Alkenes with Bidentate Ligand Systems | 58 |
| 3.2.6 | Enantiomeric Hydrogenation of Carbonyl Compounds | 60 |
| 3.3 | Osmium | 64 |
| | Acknowledgment | 66 |
| | Abbreviations | 67 |
| | References | 67 |
| 4 | Palladium and Platinum Paolo Pelagatti | 71 |
| 4.1 | Introduction | 71 |
| 4.2 | Palladium | 72 |
| 4.2.1 | Phosphorus-Containing Catalysts | 72 |
| 4.2.2 | Nitrogen-Containing Catalysts | 76 |
| 4.2.3 | Other Catalysts | 78 |
| 4.2.4 | Mechanistic Aspects | 79 |
| 4.3 | Platinum | 84 |
| 4.3.1 | Platinum Complexes Activated with Sn(II) Salts | 84 |
| 4.3.1.1 | Phosphorus-Containing Catalysts | 84 |
| 4.3.1.2 | Other Catalysts | 85 |
| 4.3.2 | Platinum Complexes not Activated with Sn(II) Salts | 86 |
| 4.3.3 | Mechanistic Aspects | 87 |
| | Abbreviations | 89 |
| | References | 89 |
| 5 | Nickel Elisabeth Bouwman | 93 |
| 5.1 | Introduction | 93 |
| 5.2 | Coordination Chemistry and Organometallic Aspects of Nickel | 94 |
| 5.2.1 | Nickel--Hydride Complexes | 94 |
| 5.2.2 | Nickel-Alkene and Nickel-Alkyl Complexes | 96 |
| 5.2.3 | Mechanistic Aspects of Hydrogen Activation | 97 |
| 5.3 | Hydrogenation Catalysis | 98 |
| 5.3.1 | Ziegler Systems | 98 |
| 5.3.2 | Nickel Complexes of Oxygen- or Nitrogen-Containing Ligands | 99 |
| 5.3.3 | Nickel Complexes of Triphenylphosphane | 100 |
| 5.3.4 | Nickel Complexes of Didentate Phosphane Ligands | 101 |
| 5.4 | Concluding Remarks | 107 |
| | Abbreviations | 108 |
| | References | 108 |
| 6 | Hydrogenation with Early Transition Metal, Lanthanide and Actinide Complexes Christophe Copéret | 111 |
| 6.1 | Introduction | 111 |
| 6.2 | Mechanistic Considerations | 112 |
| 6.3 | Group IV Metal Hydrogenation Catalysts | 113 |
| 6.3.1 | Hydrogenation of Alkenes | 113 |
| 6.3.2 | Hydrogenation of Alkynes and Dienes | 114 |
| 6.3.3 | Enantioselective Hydrogenation of Alkenes | 116 |
| 6.3.4 | Enantioselective Hydrogenation of Imines and Enanimes | 118 |
| 6.4 | Hydrogenation Catalysts Based on Group III, Lanthanide, and Actinide Complexes | 126 |
| 6.4.1 | Hydrogenation of Alkenes with Group III Metal and Lanthanide Complexes | 126 |
| 6.4.2 | Hydrogenation of Dienes and Alkynes with Group III and Lanthanide Complexes | 129 |
| 6.4.3 | Hydrogenation of Imines with Group III and Lanthanide Complexes | 131 |
| 6.4.4 | Hydrogenation of Alkenes with Actinide Complexes | 132 |
| 6.4.5 | Enantiomeric Hydrogenation of Alkenes | 134 |
| 6.5 | Hydrogenation Catalysts Based on Groups VVII Transition-Metal Complexes | 136 |
| 6.5.1 | Hydrogenation of Alkenes and Dienes with Groups VVII Transition-Metal Complexes | 136 |
| 6.5.2 | Hydrogenation of Aromatics with Well-Defined Nb and Ta Aryloxide Complexes | 138 |
| 6.6 | Supported Early Transition-Metal Complexes as Heterogeneous Hydrogenation Catalysts | 140 |
| 6.6.1 | Supported Homogeneous Catalysts | 140 |
| 6.6.2 | Heterogeneous Catalysts Prepared via Surface Organometallic Chemistry | 142 |
| 6.7 | Conclusions | 145 |
| | Acknowledgments | 146 |
| | Abbreviations | 146 |
| | References | 146 |
| 7 | Ionic Hydrogenations R. Morris Bullock | 153 |
| 7.1 | Introduction | 153 |
| 7.2 | Stoichiometric Ionic Hydrogenations | 154 |
| 7.2.1 | Stoichiometric Ionic Hydrogenations using CF3CO2H and HSiEt3 | 154 |
| 7.2.2 | Stoichiometric Ionic Hydrogenations using Transition-Metal Hydrides | 157 |
| 7.2.2.1 | General Aspects | 157 |
| 7.2.2.2 | Transition-Metal Hydrides as Proton Donors | 157 |
| 7.2.3 | Transition Metal Hydrides as Hydride Donors | 159 |
| 7.2.4 | Stoichiometric Ionic Hydrogenation of Alkenes with Metal Hydrides as the Hydride Donor | 164 |
| 7.2.5 | Stoichiometric Ionic Hydrogenation of Alkynes | 166 |
| 7.2.6 | Stoichiometric Ionic Hydrogenation of Ketones and Aldehydes using Metal Hydrides as Hydride Donors and Added Acids as the Proton Donor | 167 |
| 7.2.7 | Stoichiometric Ionic Hydrogenation of Acyl Chlorides to Aldehydes with HOTf/Metal Hydrides | 171 |
| 7.2.8 | Stoichiometric Ionic Hydrogenation of Ketones with Metal Dihydrides | 173 |
| 7.3 | Catalytic Ionic Hydrogenation | 174 |
| 7.3.1 | Catalytic Ionic Hydrogenation of C=C Bonds | 174 |
| 7.3.2 | Catalytic Ionic Hydrogenation of Ketones by Anionic Cr, Mo, and W Complexes | 174 |
| 7.3.3 | Catalytic Ionic Hydrogenation of Ketones by Molybdenocene Complexes | 176 |
| 7.3.4 | Catalytic Ionic Hydrogenation of Ketones by Cationic Mo and W Complexes | 178 |
| 7.3.4.1 | In Solution | 178 |
| 7.3.4.2 | Solvent-free | 181 |
| 7.3.4.3 | N-Heterocyclic Carbene Complexes | 182 |
| 7.3.5 | Use of a Pd Hydride in Hydrogenation of C=C Bonds | 184 |
| 7.3.6 | Catalytic Hydrogenation of Iminium Cations by Ru Complexes | 184 |
| 7.4 | Ruthenium Complexes Having an OH Proton Donor and a RuH as Hydride Donor | 186 |
| 7.4.1 | The Shvo System | 186 |
| 7.4.2 | Hydrogenation of Imines by Shvo Complexes | 189 |
| 7.4.3 | Dehydrogenation of Imines and Alcohols by Shvo Complexes | 191 |
| 7.4.4 | Catalytic Hydrogenations with Metal--Ligand Bifunctional Catalysis | 193 |
| 7.5 | Catalytic Hydrogenation of Ketones by Strong Bases | 193 |
| 7.6 | Conclusion | 194 |
| | Acknowledgments | 194 |
| | Abbreviations | 195 |
| | References | 195 |
| 8 | Homogeneous Hydrogenation by Defined Metal Clusters Roberto A. Sánchez-Delgado | 199 |
| 8.1 | Introduction | 199 |
| 8.1.1 | Is a Cluster the Real Catalyst? Fragmentation and Aggregation Phenomena | 200 |
| 8.2 | Hydrogenation of C=C Bonds | 201 |
| 8.3 | Hydrogenation of C C Bonds | 206 |
| 8.4 | Hydrogenation of Other Substrates | 211 |
| 8.5 | Concluding Remarks | 212 |
| | Abbreviations | 213 |
| | References | 213 |
| 9 | Homogeneous Hydrogenation: Colloids -- Hydrogenation with Noble Metal Nanoparticles Alain Roucoux and Karine Philippot | 217 |
| 9.1 | Introduction | 217 |
| 9.2 | Concepts | 217 |
| 9.2.1 | Electrostatic Stabilization | 218 |
| 9.2.2 | Steric Stabilization | 219 |
| 9.3 | Hydrogenation of Compounds with C=C Bonds | 220 |
| 9.3.1 | Use of Polymers as Stabilizers | 220 |
| 9.3.2 | Use of Non-Usual Polymers as Stabilizers | 221 |
| 9.3.3 | Use of Dendrimers as Stabilizers | 225 |
| 9.3.4 | Use of Surfactants as Stabilizers | 226 |
| 9.3.5 | Use of Polyoxoanions as Stabilizers | 227 |
| 9.3.6 | Use of Ligands as Stabilizers | 228 |
| 9.3.7 | Biomaterial as a Protective Matrix | 232 |
| 9.3.8 | Ionic Liquids used as Templates for the Stabilization of Metal Nanoparticles | 233 |
| 9.3.9 | Supercritical Microemulsions Used as Templates for the Stabilization of Metal Nanoparticles | 236 |
| 9.3.10 | Conclusion | 238 |
| 9.4 | Hydrogenation of Compounds with C C Bonds | 238 |
| 9.5 | Arene Hydrogenation | 241 |
| 9.6 | Hydrogenation of Compounds with C=O Bonds | 245 |
| 9.7 | Enantioselective Hydrogenation | 249 |
| 9.8 | Conclusion | 252 |
| | Abbreviations | 252 |
| | References | 253 |
| 10 | Kinetics of Homogeneous Hydrogenations: Measurement and Interpretation Hans-Joachim Drexler, Angelika Preetz, Thomas Schmidt, and Detlef Heller | 257 |
| 10.1 | Introduction | 257 |
| 10.2 | The Basics of Michaelis-Menten Kinetics | 259 |
| 10.3 | Hydrogenation From a Kinetic Viewpoint | 263 |
| 10.3.1 | Measurement of Concentration--Time Data and Possible Problems | 263 |
| 10.3.1.1 | Monitoring of Hydrogenations via Hydrogen Consumption | 264 |
| 10.3.1.2 | Monitoring of Hydrogenations by NMR and UV/Visible Spectroscopy | 272 |
| 10.3.2 | Gross-Kinetic Measurements | 277 |
| 10.3.2.1 | Derivation of Michaelis-Menten Kinetics with Various Catalyst-Substrate Complexes | 277 |
| 10.3.2.2 | Data from Gross Kinetic Measurements | 280 |
| | Abbreviations | 288 |
| | References | 288 |
| Part II | Spectroscopic Methods in Homogeneous Hydrogenation | |
| 11 | Nuclear Magnetic Resonance Spectroscopy in Homogeneous Hydrogenation Research N. Koen de Vries | 297 |
| 11.1 | Introduction | 297 |
| 11.1.1 | Nuclear Magnetic Resonance (NMR) | 297 |
| 11.1.2 | NMR in Homogeneous Hydrogenation Research | 298 |
| 11.2 | NMR Methods | 299 |
| 11.2.1 | General | 299 |
| 11.2.2 | Chemical Shift | 300 |
| 11.2.2.1 | General | 300 |
| 11.2.2.2 | Chemical Shifts in Homogeneous Hydrogenation Research | 300 |
| 11.2.3 | Coupling Constant | 301 |
| 11.2.4 | 2D-NMR | 302 |
| 11.2.4.1 | General | 302 |
| 11.2.4.2 | 2D-NMR in Homogeneous Hydrogenation Research | 302 |
| 11.2.5 | Variable Temperature and Variable Pressure Studies | 307 |
| 11.2.5.1 | General | 307 |
| 11.2.5.2 | Variable-Temperature Studies in Homogeneous Hydrogenation Research | 307 |
| 11.2.5.3 | Variable-Pressure Studies in Homogeneous Hydrogenation Research | 308 |
| 11.2.6 | PGSE NMR Diffusion Methods | 309 |
| 11.3 | Outlook | 309 |
| | Abbreviations | 310 |
| | References | 310 |
| 12 | Parahydrogen-Induced Polarization: Applications to Detect Intermediates of Catalytic Hydrogenations Joachim Bargon | 313 |
| 12.1 | In-Situ Spectroscopy | 313 |
| 12.1.1 | In-Situ NMR Spectroscopy | 313 |
| 12.1.2 | In-Situ PHIP-NMR Spectroscopy | 314 |
| 12.2 | Ortho- and Parahydrogen | 315 |
| 12.2.1 | Magnetic Field Dependence of the PHIP-Phenomenon: PASADENA and ALTADENA Conditions | 316 |
| 12.2.2 | PHIP, CIDNP, and Radical Mechanisms | 318 |
| 12.2.3 | Preparation of Parahydrogen | 319 |
| 12.2.3.1 | Parahydrogen Enrichment | 319 |
| 12.2.3.2 | High-Pressure Apparatus for Parahydrogen Enrichment | 320 |
| 12.2.3.3 | Enrichment of Parahydrogen using Closed-Circuit Cryorefrigeration | 321 |
| 12.2.4 | Preparation of Orthohydrogen | 322 |
| 12.2.5 | Thermal Conductivity Cells for Ortho/Para Determination | 322 |
| 12.2.6 | Determination of the Ortho/Para Ratio | 323 |
| 12.2.7 | Enrichment of Ortho- or Paradeuterium | 323 |
| 12.3 | Applications of PHIP-NMR Spectroscopy | 324 |
| 12.3.1 | In-Situ PHIP-NMR Spectroscopy of Homogeneous Hydrogenations | 324 |
| 12.3.1.1 | Activation of Dihydrogen | 324 |
| 12.3.1.2 | Concepts of Reaction Mechanisms | 324 |
| 12.3.2 | In-Situ PHIP-NMR Observation of Mono- and Binuclear Rhodium Dihydride Complexes | 325 |
| 12.3.2.1 | Reactions of [RhCl(NBD)]2 with Parahydrogen in the Presence of Tertiary Phosphines | 325 |
| 12.3.2.2 | Formation of the Binuclear Complexes [(H)(Cl)Rh(PMe3)2( -Cl)( -H)Rh(PMe3)] and [(H)(Cl)Rh(PMe2Ph)2( -Cl)( -H)Rh(PMe2Ph)] | 328 |
| 12.3.2.3 | General Procedure for the Generation of the Complexes [Rh(H)2ClL3] (L=Phosphine) | 329 |
| 12.3.3.3 | Intermediate Dihydrides of Cationic Rh Catalysts | 329 |
| 12.3.3.4 | Obtaining Structural Information using 13C-Labeled Substrates | 332 |
| 12.4 | Catalyst-Attached Products as Observable Intermediates | 335 |
| 12.4.1 | Enantioselective Substrates | 336 |
| 12.4.2 | Chiral Catalysts | 336 |
| 12.4.3 | Determination of Kinetic Constants | 338 |
| 12.4.4 | Computer-Assisted Prediction and Analysis of the Polarization Patterns: DYPAS2 | 341 |
| 12.5 | Colloidal Catalysts | 342 |
| 12.5.1 | In-Situ PHIP-NMR Investigation of the Hydrogenation of Ethynylbenzene by Pdx[N(octyl) 4Cl] y | 342 |
| 12.6 | Transfer of Proton Polarization to Heteronuclei | 344 |
| 12.6.1 | General Aspects | 344 |
| 12.6.2 | Polarization Transfer to 13C | 346 |
| 12.6.3 | Polarization Transfer to 19F | 352 |
| 12.6.4 | Parahydrogen-Assisted Signal Enhancement for Magnetic Resonance Imaging | 353 |
| 12.7 | Catalysts Containing other Transition Metals | 354 |
| 12.8 | Summary and Conclusions | 354 |
| | Acknowledgment | 355 |
| | Abbreviations | 355 |
| | References | 356 |
| 13 | A Tour Guide to Mass Spectrometric Studies of Hydrogenation Mechanisms Corbin K. Ralph, Robin J. Hamilton, and Steven H. Bergens | 359 |
| 13.1 | Introduction | 359 |
| 13.2 | A General Description of ESI-MS | 360 |
| 13.3 | Mechanistic Hydrogenation Studies | 364 |
| 13.4 | Conclusions | 369 |
| | Acknowledgments | 370 |
| | Abbreviations | 370 |
| | References | 370 |
| Part III | Homogeneous Hydrogenation by Functional Groups | |
| 14 | Homogeneous Hydrogenation of Alkynes and Dienes Alexander M. Kluwer and Cornelis J. Elsevier | 375 |
| 14.1 | Stereoselective Homogeneous Hydrogenation of Alkynes to Alkenes | 375 |
| 14.1.1 | Introduction | 375 |
| 14.1.2 | Chromium Catalysts | 376 |
| 14.1.3 | Iron Catalysts | 377 |
| 14.1.4 | Ruthenium Catalysts | 378 |
| 14.1.5 | Osmium Catalysts | 382 |
| 14.1.6 | Rhodium Catalysts | 384 |
| 14.1.7 | Iridium Catalysts | 386 |
| 14.1.8 | Palladium Catalysts | 388 |
| 14.1.9 | Conclusions | 394 |
| 14.2 | Homogeneous Hydrogenation of Dienes to Monoenes | 394 |
| 14.2.1 | Introduction | 394 |
| 14.2.2 | Zirconium Catalysts | 395 |
| 14.2.3 | Chromium Catalysts | 397 |
| 14.2.4 | Ruthenium Catalysts | 400 |
| 14.2.5 | Cobalt Catalysts | 402 |
| 14.2.6 | Rhodium Catalysts | 402 |
| 14.2.7 | Palladium and Platinum Catalysts | 406 |
| 14.2.8 | Conclusions | 408 |
| | Abbreviations | 409 |
| | References | 409 |
| 15 | Homogeneous Hydrogenation of Aldehydes, Ketones, Imines and Carboxylic Acid Derivatives: Chemoselectivity and Catalytic Activity Matthew L. Clarke and Geoffrey J. Roff | 413 |
| 15.1 | Introduction | 413 |
| 15.2 | Hydrogenation of Aldehydes | 414 |
| 15.2.1 | Iridium Catalysts | 414 |
| 15.2.2 | Rhodium Catalysts | 417 |
| 15.2.2.1 | Rh-amine Catalysts | 417 |
| 15.2.2.2 | Cationic Rhodium Phosphine Catalysts | 418 |
| 15.2.2.3 | Water-Soluble Rh Catalysts | 419 |
| 15.2.3 | Ruthenium Catalysts | 420 |
| 15.2.3.1 | Ru-PPh3 Catalysts | 420 |
| 15.2.3.2 | Polydentate Ru Catalysts | 421 |
| 15.2.3.3 | Diamine-Modified Ru Catalysts | 422 |
| 15.2.3.4 | Ru-TPPMS/TPPTS Catalysts | 423 |
| 15.2.4 | Other Metal Catalysts | 425 |
| 15.2.4.1 | Copper | 425 |
| 15.2.4.2 | Osmium | 425 |
| 15.3 | Hydrogenation of Ketones | 426 |
| 15.3.1 | Iridium Catalysts | 426 |
| 15.3.2 | Rhodium Catalysts | 428 |
| 15.3.2.1 | Rh-Phosphine Catalysts | 428 |
| 15.3.2.2 | Water-Soluble Rh Catalysts | 430 |
| 15.3.3 | Ruthenium Catalysts | 431 |
| 15.3.3.1 | Ruthenium Carbonyl Clusters | 431 |
| 15.3.3.2 | Ru--PPh3 Complexes | 431 |
| 15.3.3.3 | Diamine-Modified Ru Catalysts | 433 |
| 15.3.3.4 | Other Ru Catalysts | 434 |
| 15.3.4 | Other Metal Catalysts | 435 |
| 15.3.4.1 | Copper | 435 |
| 15.3.4.2 | Metal Carbonyls | 436 |
| 15.4 | Domino-Hydroformylation-Reduction Reactions | 436 |
| 15.4.1 | Cobalt Catalysts | 436 |
| 15.4.2 | Rhodium Catalysts | 437 |
| 15.5 | Reductive Amination of Ketones and Aldehydes | 437 |
| 15.6 | Hydroaminomethylation of Alkenes (Domino Hydroformylation-Reductive Amination) | 439 |
| 15.7 | Hydrogenation of Carboxylic Acid Derivatives | 441 |
| 15.7.1 | Hydrogenation of Acids and Anhydrides | 442 |
| 15.7.2 | Hydrogenation of Esters | 445 |
| 15.8 | Summary and Outlook | 450 |
| | Abbreviations | 451 |
| | References | 452 |
| 16 | Hydrogenation of Arenes and Heteroaromatics Claudio Bianchini, Andrea Meli, and Francesco Vizza | 455 |
| 16.1 | Introduction | 455 |
| 16.2 | Hydrogenation of Arenes | 456 |
| 16.2.1 | Molecular Catalysts in Different Phase-Variation Systems | 456 |
| 16.2.2 | Molecular Catalysts Immobilized on Support Materials | 466 |
| 16.3 | Hydrogenation of Heteroaromatics | 470 |
| 16.3.1 | Molecular Catalysts in Different Phase-Variation Systems | 470 |
| 16.3.1.1 | S-Heteroaromatics | 470 |
| 16.3.1.2 | N-Heteroaromatics | 474 |
| 16.3.1.3 | O-Heteroaromatics | 479 |
| 16.3.2 | Molecular Catalysts Immobilized on Support Materials | 479 |
| 16.4 | Stereoselective Hydrogenation of Prochiral Heteroaromatics | 481 |
| 16.4.1 | Molecular Catalysts in Homogeneous Phase | 481 |
| 16.4.2 | Molecular Catalysts Immobilized on Support Materials | 484 |
| | Abbreviations | 484 |
| | References | 485 |
| 17 | Homogeneous Hydrogenation of Carbon Dioxide Philip G. Jessop | 489 |
| 17.1 | Introduction | 489 |
| 17.2 | Reduction to Formic Acid | 490 |
| 17.2.1 | Insertion Mechanisms | 494 |
| 17.2.2 | Ionic Hydrogenation | 497 |
| 17.2.3 | Concerted Ionic Hydrogenation | 498 |
| 17.2.4 | Bicarbonate Hydrogenation | 498 |
| 17.2.5 | Other Mechanisms | 499 |
| 17.3 | Reduction to Oxalic Acid | 499 |
| 17.4 | Reduction to Formate Esters | 500 |
| 17.4.1 | In the Presence of Alcohols | 500 |
| 17.4.2 | In the Presence of Alkyl Halides | 502 |
| 17.4.3 | In the Presence of Epoxides | 503 |
| 17.5 | Reduction to Formamides | 504 |
| 17.6 | Reduction to Other Products | 506 |
| 17.7 | Concluding Remarks | 507 |
| | Acknowledgments | 507 |
| | Abbreviations | 508 |
| | References | 508 |
| 18 | Dehalogenation Reactions Attila Sisak and Ottó Balzás Simon | 513 |
| 18.1 | Introduction | 513 |
| 18.2 | Catalytic Dehalogenation with Various Reducing Agents | 517 |
| 18.2.1 | Molecular Hydrogen | 517 |
| 18.2.2 | Simple and Complex Metal Hydrides | 520 |
| 18.2.3 | Hydrosilanes and Hydrostannanes | 524 |
| 18.2.4 | Hydrogen Donors other than Hydrides | 526 |
| 18.2.5 | Biomimetic Dehalogenations | 528 |
| 18.2.6 | Electrochemical Reductions | 532 |
| 18.2.7 | Miscellaneous Reducing Methods | 533 |
| 18.3 | Mechanistic Considerations | 534 |
| 18.3.1 | Activation of the CX Bond | 535 |
| 18.3.1.1 | Oxidative Addition | 535 |
| 18.3.1.2 | -Bond Metathesis | 537 |
| 18.3.1.3 | SN2 Attack of the Hydride Ligand | 538 |
| 18.3.1.4 | 1,2-Insertion | 538 |
| 18.3.2 | Reaction Steps Involving the Reducing Agents | 538 |
| 18.3.3 | Formation of the Product | 539 |
| 18.4 | Concluding Remarks | 540 |
| | Acknowledgments | 540 |
| | Abbreviations | 540 |
| | References | 541 |
| 19 | Homogeneous Catalytic Hydrogenation of Polymers Garry L. Rempel, Qinmin Pan, and Jialong Wu | 547 |
| 19.1 | General Introduction | 547 |
| 19.1.1 | Diene-Based Polymers | 547 |
| 19.1.2 | Hydrogenation of Diene-Based Polymers | 548 |
| 19.1.2.1 | Heterogeneous Catalysts | 549 |
| 19.1.2.2 | Homogeneous Catalysts | 550 |
| 19.2 | Reaction Art | 551 |
| 19.2.1 | Catalyst Techniques | 551 |
| 19.2.2 | Hydrogenation Kinetic Mechanism | 565 |
| 19.2.2.1 | Rhodium-Based Catalysts | 565 |
| 19.2.2.2 | Ruthenium-Based Catalysts | 568 |
| 19.2.2.3 | Osmium-Based Catalysts | 571 |
| 19.2.2.4 | Palladium Complexes | 572 |
| 19.2.3 | Kinetic Mechanism Discrimination | 573 |
| 19.3 | Engineering Art | 573 |
| 19.3.1 | Catalyst Recovery | 574 |
| 19.3.1.1 | Precipitation | 575 |
| 19.3.1.2 | Adsorption | 575 |
| 19.3.2 | Solvent Recycling | 576 |
| 19.3.3 | Reactor Technology and Catalytic Engineering Aspects | 577 |
| 19.4 | A Commercial Example: Production of HNBR via a Homogeneous Hydrogenation Route | 578 |
| 19.5 | Future Outlook and Perspectives | 579 |
| | Abbreviations | 579 |
| | References | 579 |
| 20 | Transfer Hydrogenation Including the Meerwein-Ponndorf-Verley Reduction Dirk Klomp, Ulf Hanefeld, and Joop A. Peters | 585 |
| 20.1 | Introduction | 585 |
| 20.2 | Reaction Mechanisms | 587 |
| 20.2.1 | Hydrogen Transfer Reduction of Carbonyl Compounds | 588 |
| 20.2.1.1 | Meerwein-Ponndorf-Verley Reduction and Oppenauer Oxidation | 588 |
| 20.2.1.2 | Transition Metal-Catalyzed Reductions | 590 |
| 20.2.2 | Transfer Hydrogenation Catalysts for Reduction of C--C Double and Triple Bonds | 595 |
| 20.3 | Reaction Conditions | 597 |
| 20.3.1 | Hydrogen Donors | 597 |
| 20.3.2 | Solvents | 600 |
| 20.3.3 | Catalysts and Substrates | 601 |
| 20.3.4 | Selectivity | 603 |
| 20.4 | Related Reactions and Side-Reactions | 609 |
| 20.4.1 | Aldol Reaction | 609 |
| 20.4.2 | Tishchenko Reaction | 609 |
| 20.4.3 | Cannizzaro Reaction | 609 |
| 20.4.4 | Decarbonylation | 610 |
| 20.4.5 | Leuckart-Wallach and Eschweiler-Clarke Reactions | 610 |
| 20.4.6 | Reductive Acetylation of Ketones | 610 |
| 20.4.7 | Other Hydrogen Transfer Reactions | 611 |
| 20.5 | Racemizations | 612 |
| | Abbreviations | 627 |
| | References | 627 |
| 21 | Diastereoselective Hydrogenation Takamichi Yamagishi | 631 |
| 21.1 | Introduction | 631 |
| 21.2 | Hydrogenation of Alkenes, Ketones, and Imines | 631 |
| 21.3 | Substrate-Directive Diastereoselective Hydrogenation | 638 |
| 21.3.1 | Hydrogenation of Cyclic Alcohols with Endo- or Exo-Cyclic Olefinic Bond | 638 |
| 21.3.2 | Hydrogenation of Acyclic Allyl and Homoallyl Alcohols | 653 |
| 21.3.3 | Ester Unit- or Amide-Directive Hydrogenation | 667 |
| 21.4 | Hydrogenation of Dehydrooligopeptides | 671 |
| 21.5 | Diastereoselective Hydrogenation of Keto-Compounds | 676 |
| 21.5.1 | Substrate-Directive Hydrogenation of Keto-Compounds | 681 |
| 21.5.2 | Hydrogenation of Diketo Esters and Diketones | 684 |
| 21.6 | Kinetic Resolution to Selectively Afford Diastereomers and Enantiomers | 691 |
| 21.7 | Kinetic Resolution of Keto- and Imino-Compounds | 694 |
| 21.8 | Dynamic Kinetic Resolution | 697 |
| 21.9 | Conclusions | 701 |
| | Abbreviations | 708 |
| | References | 708 |
| 22 | Hydrogen-Mediated CarbonCarbon Bond Formation Catalyzed by Rhodium Chang-Woo Cho and Michael J. Krische | 713 |
| 22.1 | Introduction and Mechanistic Considerations | 713 |
| 22.2 | Reductive Coupling of Conjugated Enones and Aldehydes | 716 |
| 22.2.1 | Intramolecular Reductive Aldolization | 716 |
| 22.2.2 | Intermolecular Reductive Aldolization | 720 |
| 22.3 | Reductive Coupling of 1,3-Cyclohexadiene and -Ketoaldehydes | 723 |
| 22.4 | Reductive Coupling of Conjugated Enynes and Diynes with Activated Aldehydes and Imines | 726 |
| 22.5 | Reductive Cyclization of 1,6-Diynes and 1,6-Enynes | 733 |
| 22.6 | Conclusion | 736 |
| | Acknowledgments | 737 |
| | Abbreviations | 737 |
| | References | 737 |
| Part IV | Asymmetric Homogeneous Hydrogenation | |
| 23 | Enantioselective Alkene Hydrogenation: Introduction and Historic Overview David J. Ager | 745 |
| 23.1 | Introduction | 745 |
| 23.2 | Development of CAMP and DIPAMP | 746 |
| 23.3 | DIOP | 749 |
| 23.4 | Ferrocene Ligands | 753 |
| 23.4.1 | Ferrocene Hybrids | 756 |
| 23.5 | Atropisomeric Systems | 756 |
| 23.6 | DuPhos | 758 |
| 23.7 | Variations at Phosphorus | 760 |
| 23.8 | Monophosphorus Ligands | 762 |
| 23.9 | A Return to Monodentate Ligands | 762 |
| 23.10 | Summary | 763 |
| | References | 764 |
| 24 | Enantioselective Hydrogenation: Phospholane Ligands Christopher J. Cobley and Paul H. Moran | 773 |
| 24.1 | Introduction and Extent of Review | 773 |
| 24.2 | Phospholane Ligands: Synthesis and Scope | 774 |
| 24.2.1 | Early Discoveries and the Breakthrough with DuPhos and BPE | 774 |
| 24.2.2 | Modifications to the Backbone | 778 |
| 24.2.3 | Modifications to the Phospholane Substituents | 779 |
| 24.2.4 | Other Phospholane-Containing Ligands | 783 |
| 24.2.5 | Related Phosphacycle-Based Ligands | 786 |
| 24.3 | Enantioselective Hydrogenation of Alkenes | 788 |
| 24.3.1 | Enantioselective Hydrogenation of a-Dehydroamino Acid Derivatives | 788 |
| 24.3.2 | Enantioselective Hydrogenation of b-Dehydroamino Acid Derivatives | 801 |
| 24.3.3 | Enantioselective Hydrogenation of Enamides | 806 |
| 24.3.4 | Enantioselective Hydrogenation of Unsaturated Acid and Ester Derivatives | 810 |
| 24.3.5 | Enantioselective Hydrogenation of Unsaturated Alcohol Derivatives | 816 |
| 24.3.6 | Enantioselective Hydrogenation of Miscellaneous C=C Bonds | 819 |
| 24.4 | Enantioselective Hydrogenation of C=O and C=N Bonds | 820 |
| 24.4.1 | Enantioselective Hydrogenation of Ketones | 820 |
| 24.4.2 | Enantioselective Hydrogenation of Imines and C=NX Bonds | 822 |
| 24.5 | Concluding Remarks | 823 |
| | Abbreviations | 823 |
| | References | 824 |
| 25 | Enantioselective Hydrogenation of Alkenes with Ferrocene-Based Ligands Hans-Ulrich Blaser, Matthias Lotz, and Felix Spindler | 833 |
| 25.1 | Introduction | 833 |
| 25.2 | Ligands with Phosphine Substituents Bound to One Cyclopentadiene Ring | 835 |
| 25.3 | Ligands with Phosphine Substituents Bound to both Cyclopentadiene Rings | 835 |
| 25.3.1 | Bppfa, Ferrophos, and Mandyphos Ligands | 836 |
| 25.3.2 | Miscellaneous Diphosphines | 837 |
| 25.4 | Ligands with Phosphine Substituents Bound to a Cyclopentadiene Ring and to a Side Chain | 839 |
| 25.4.1 | Josiphos | 839 |
| 25.4.2 | Immobilized Josiphos and Josiphos Analogues | 841 |
| 25.4.3 | Taniaphos | 842 |
| 25.4.3 | Various Ligands | 843 |
| 25.5 | Ligands with Phosphine Substituents Bound only to Side Chains | 844 |
| 25.6 | Major Applications of Ferrocene Diphosphine-Based Catalysts | 847 |
| 25.6.1 | Hydrogenation of Substituted Alkenes | 848 |
| 25.6.2 | Hydrogenation of C=O and C=N Functions | 848 |
| | Abbreviations | 850 |
| | References | 850 |
| 26 | The other Bisphosphine Ligands for Enantioselective Alkene Hydrogenation Yongxiang Chi, Wenjun Tang, and Xumu Zhang | 853 |
| 26.1 | Introduction | 853 |
| 26.2 | Chiral Bisphosphine Ligands | 853 |
| 26.2.1 | Atropisomeric Biaryl Bisphosphine Ligands | 853 |
| 26.2.2 | Chiral Bisphosphine Ligands Based on DIOP Modifications | 860 |
| 26.2.3 | P-Chiral Bisphosphine Ligands | 861 |
| 26.2.4 | Other Bisphosphine Ligands | 862 |
| 26.3 | Applications in Enantioselective Hydrogenation of Alkenes | 864 |
| 26.3.1 | Enantioselective Hydrogenation of -Dehydroamino Acid Derivatives | 864 |
| 26.3.2 | Enantioselective Hydrogenation of Enamides | 866 |
| 26.3.3 | Enantioselective Hydrogenation of ( -Acylamino) Acrylates | 868 |
| 26.3.4 | Enantioselective Hydrogenation of Enol Esters | 870 |
| 26.3.5 | Enantioselective Hydrogenation of Unsaturated Acids and Esters | 872 |
| 26.3.5.1 | , -Unsaturated Carboxylic Acids | 872 |
| 26.3.5.2 | , -Unsaturated Esters, Amides, Lactones, and Ketones | 874 |
| 26.3.5.3 | Itaconic Acids and Their Derivatives | 874 |
| 26.3.6 | Enantioselective Hydrogenation of Unsaturated Alcohols | 875 |
| 26.4 | Concluding Remarks | 877 |
| | References | 877 |
| 27 | Bidentate Ligands Containing a HeteroatomPhosphorus Bond Stanton H.L. Kok, Terry T.-L. Au-Yeung, Hong Yee Cheung, Wing Sze Lam, Shu Sun Chan, and Albert S.C. Chan | 883 |
| 27.1 | Introduction | 883 |
| 27.2 | Aminophosphine-Phosphinites (AMPPs) | 883 |
| 27.3 | Bisphosphinamidite Ligands | 907 |
| 27.4 | Mixed Phosphine-Phosphoramidites and Phosphine-Aminophosphine Ligands | 918 |
| 27.5 | Bisphosphinite Ligands (One P--O Bond) | 924 |
| 27.6 | Bisphosphonite Ligands (Two P--O Bonds) | 978 |
| 27.7 | Bisphosphite Ligands (Three P--O Bonds) | 980 |
| 27.8 | Other Mixed-Donor Bidentate Ligands | 981 |
| 27.9 | Ligands Containing Neutral S-Donors | 983 |
| | Acknowledgments | 988 |
| | Abbreviations | 988 |
| | References | 988 |
| 28 | Enantioselective Alkene Hydrogenation: Monodentate Ligands Michel van den Berg, Ben L. Feringa, and Adriaan J. Minnaard | 995 |
| 28.1 | Introduction | 995 |
| 28.2 | Monodentate Phosphines | 997 |
| 28.3 | Monodentate Phosphonites | 1000 |
| 28.4 | Monodentate Phosphites | 1000 |
| 28.5 | Monodentate Phosphoramidites | 1005 |
| 28.6 | Monodentate Phosphinites, Aminophosphinites, Diazaphospholidines and Secondary Phosphine Oxides | 1010 |
| 28.7 | Hydrogenation of N-Acyl- -Dehydroamino Acids and Esters | 1011 |
| 28.8 | Hydrogenation of Unsaturated Acids and Esters | 1014 |
| 28.9 | Hydrogenation of N-Acyl Enamides, Enol Esters and Enol Carbamates | 1016 |
| 28.10 | Hydrogenation of N-Acyl- -Dehydroamino Acid Esters | 1020 |
| 28.11 | Hydrogenation of Ketones and Imines | 1021 |
| 28.12 | Conclusions | 1023 |
| | Abbreviations | 1024 |
| | References | 1024 |
| 29 | P,N and Non-Phosphorus Ligands Andreas Pfaltz and Sharon Bell | 1029 |
| 29.1 | Introduction | 1029 |
| 29.2 | Oxazoline-Derived P,N Ligands | 1030 |
| 29.2.1 | Phosphino-oxazolines | 1030 |
| 29.2.2 | Phosphite and Phosphinite Oxazolines | 1033 |
| 29.2.3 | Oxazoline-Derived Ligands Containing a P--N Bond | 1036 |
| 29.2.4 | Structurally Related Ligands | 1038 |
| 29.3 | Pyridine and Quinoline-Derived P,N Ligands | 1040 |
| 29.4 | Carbenoid Imidazolylidene Ligands | 1042 |
| 29.5 | Metallocenes | 1043 |
| 29.6 | Other Ligands | 1044 |
| 29.7 | Conclusions | 1046 |
| | Abbreviations | 1046 |
| | References | 1047 |
| 30 | Enantioselective Hydrogenation of Unfunctionalized Alkenes Andreas Pfaltz and Sharon Bell | 1049 |
| 30.1 | Introduction | 1049 |
| 30.2 | Terminal Alkenes | 1050 |
| 30.2.1 | 2-Aryl-1-Butenes | 1050 |
| 30.2.2 | Other Terminal Alkenes | 1054 |
| 30.3 | Trisubstituted Alkenes | 1056 |
| 30.3.1 | Introduction | 1056 |
| 30.3.2 | Ir Catalysts | 1057 |
| 30.3.3 | Standard Test Substrates | 1057 |
| 30.3.4 | Other Substrates | 1063 |
| 30.4 | Tetrasubstituted Alkenes | 1066 |
| 30.4.1 | Substrates | 1066 |
| 30.5 | Dienes and Trienes | 1067 |
| 30.6 | Conclusions | 1069 |
| | Abbreviations | 1070 |
| | References | 1070 |
| 31 | Mechanism of Enantioselective Hydrogenation John M. Brown | 1073 |
| 31.1 | Introduction | 1073 |
| 31.2 | Rhodium-Catalyzed Hydrogenations | 1074 |
| 31.2.1 | Background | 1074 |
| 31.2.2 | More Recent Developments | 1076 |
| 31.2.3 | Transient and Reactive Intermediates in Rhodium Enantioselective Hydrogenation | 1078 |
| 31.2.4 | Mnemonics for the Sense of Enantioselective Hydrogenation | 1082 |
| 31.2.5 | Status of the Computational Study of Rhodium-Complex-Catalyzed Enantioselective Hydrogenation | 1082 |
| 31.2.6 | Monophosphines in Rhodium-Complex-Catalyzed Enantioselective Hydrogenation | 1086 |
| 31.2.7 | Mechanism of Hydrogenation of b-Dehydroamino Acid Precursors | 1087 |
| 31.2.8 | Current Status of Rhodium Hydrogenations | 1088 |
| 31.3 | Ruthenium-Complex-Catalyzed Hydrogenations | 1093 |
| 31.3.1 | Reactive Intermediates in Ruthenium-Complex-Catalyzed Hydrogenations | 1093 |
| 31.3.2 | Kinetic Analysis of Ruthenium-Complex-Catalyzed Hydrogenations | 1093 |
| 31.4 | Iridium-Complex-Catalyzed Hydrogenations | 1094 |
| 31.4.1 | Background | 1094 |
| 31.4.2 | Mechanistic and Computational Studies | 1095 |
| 31.4.3 | Counter-Ion Effects | 1097 |
| 31.5 | Summary and Conclusions | 1098 |
| | Acknowledgments | 1099 |
| | Abbreviations | 1099 |
| | References | 1099 |
| 32 | Enantioselective Ketone and b-Keto Ester Hydrogenations (Including Mechanisms) Takeshi Ohkuma and Ryoji Noyori | 1105 |
| 32.1 | Chiral Ligands | 1105 |
| 32.2 | -Keto Esters and Analogues | 1107 |
| 32.2.1 | -Keto Esters | 1107 |
| 32.2.2 | 1,3-Diketones | 1122 |
| 32.2.3 | -Keto Phosphonates, Sulfonates, and Sulfones | 1125 |
| 32.2.4 | Dynamic Kinetic Resolution | 1127 |
| 32.3 | Simple Ketones | 1131 |
| 32.3.1 | Alkyl Aryl Ketones | 1131 |
| 32.3.2 | Hetero-Substituted Aromatic Ketones | 1141 |
| 32.3.3 | Diaryl Ketones | 1144 |
| 32.3.4 | Heteroaromatic Ketones | 1144 |
| 32.3.5 | Dialkyl Ketones | 1147 |
| 32.3.6 | Unsaturated Ketones | 1148 |
| 32.3.7 | Kinetic Resolution and Dynamic Kinetic Resolution | 1150 |
| 32.3.8 | Enantioselective Activation and Deactivation | 1154 |
| | Abbreviations | 1156 |
| | References | 1156 |
| 33 | Rhodium-Catalyzed Enantioselective Hydrogenation of Functionalized Ketones André Mortreux and Abdallah Karim | 1165 |
| 33.1 | Introduction | 1165 |
| 33.2 | Basic Principles of Ketone Hydrogenation on Rhodium Catalysts | 1166 |
| 33.3 | Enantioselective Hydrogenation of Ketoesters | 1166 |
| 33.3.1 | Enantioselective Hydrogenation of Ketopantoyllactone (KPL) | 1166 |
| 33.3.2 | Hydrogenation of Ketoesters and Ketoamides | 1172 |
| 33.3.2.1 | -Ketoesters and Ketoamides | 1172 |
| 33.3.2.2 | , -Diketoesters | 1176 |
| 33.3.3 | Hydrogenation of Amino Ketones | 1177 |
| 33.3.3.1 | -Amino Ketones | 1177 |
| 33.3.3.2 | - and -Amino Ketones | 1184 |
| 33.4 | Enantioselective Hydrogenation of Fluoroketones | 1186 |
| 33.5 | Conclusions | 1188 |
| | Abbreviations and Acronyms | 1189 |
| | References | 1189 |
| 34 | Enantioselective Hydrogenation of C=N Functions and Enamines Felix Spindler and Hans-Ulrich Blaser | 1193 |
| 34.1 | Introduction | 1193 |
| 34.2 | Chiral Ligands | 1195 |
| 34.3 | N-Aryl Imines | 1197 |
| 34.4 | N-Alkyl Imines | 1200 |
| 34.5 | Cyclic Imines and Heteraromatic Substrates | 1202 |
| 34.6 | Miscellaneous C=N--X Systems | 1204 |
| 34.7 | Enamines | 1206 |
| 34.8 | Mechanistic Aspects | 1207 |
| 34.9 | Alternative Reduction Systems | 1209 |
| 34.10 | Assessment of Catalysts and Conclusions | 1210 |
| 34.10.1 | Iridium Complexes | 1210 |
| 34.10.2 | Rhodium Complexes | 1211 |
| 34.10.3 | Ruthenium Complexes | 1211 |
| 34.10.4 | Titanium Complexes | 1211 |
| | Abbreviations | 1212 |
| | References | 1212 |
| 35 | Enantioselective Transfer Hydrogenation A. John Blacker | 1215 |
| 35.1 | Introduction | 1215 |
| 35.2 | Homogenous Metal Catalysts | 1216 |
| 35.2.1 | Early studies | 1216 |
| 35.2.2 | Group VIII Metal Catalysts | 1217 |
| 35.2.3 | Chiral Ligands | 1218 |
| 35.2.4 | Immobilized Ligands | 1220 |
| 35.2.5 | Water-Soluble Ligands | 1221 |
| 35.2.6 | Catalyst Selection | 1221 |
| 35.2.7 | Catalyst Preparation | 1222 |
| 35.2.8 | The Reaction Mechanism | 1223 |
| 35.3 | Hydrogen Donors | 1224 |
| 35.3.1 | The IPA System | 1224 |
| 35.3.2 | The TEAF System | 1225 |
| 35.3.3 | Other Hydrogen Donors | 1229 |
| 35.4 | Substrates and Products | 1229 |
| 35.4.1 | Aldehydes | 1229 |
| 35.4.2 | Ketones | 1229 |
| 35.4.3 | Aldimines | 1231 |
| 35.4.4 | Ketimines | 1232 |
| 35.4.5 | Alkenes | 1235 |
| 35.5 | Solvents | 1235 |
| 35.6 | Reaction Conditions, Optimization, and Scale-Up | 1236 |
| 35.6.1 | Temperature | 1236 |
| 35.6.2 | Productivity | 1237 |
| 35.6.3 | Reaction Control | 1238 |
| 35.6.4 | Large-Scale Processes | 1239 |
| 35.7 | Discussion | 1239 |
| | Abbreviations | 1240 |
| | References | 1241 |
| 36 | High-Throughput Experimentation and Ligand Libraries Johannes G. de Vries and Laurent Lefort | 1245 |
| 36.1 | Introduction | 1245 |
| 36.2 | High-Throughput Experimentation | 1248 |
| 36.2.1 | Serial Mode | 1248 |
| 36.2.2 | Parallel Experimentation | 1249 |
| 36.2.3 | Combinatorial Protocols | 1249 |
| 36.3 | Generating and Testing Libraries of Catalysts and Ligands | 1250 |
| 36.3.1 | Libraries of Individually Synthesized Ligands | 1250 |
| 36.3.2 | Automated Synthesis of Ligand Libraries | 1258 |
| 36.3.3 | Mixtures of Chiral Monodentate Ligands | 1263 |
| 36.3.4 | Mixtures of Chiral Monodentate Ligands and Nonchiral Ligands | 1267 |
| 36.3.5 | Supramolecular Approaches to Ligand Libraries | 1270 |
| 36.4 | Methodology for Testing Catalysts | 1272 |
| 36.5 | High-Throughput Analysis | 1273 |
| 36.6 | Conclusions | 1274 |
| | Abbreviations | 1275 |
| | References | 1275 |
| 37 | Industrial Applications Hans-Ulrich Blaser, Felix Spindler, and Marc Thommen | 1279 |
| 37.1 | Introduction and Scope of the Chapter | 1279 |
| 37.2 | Requirements for Technical-Scale Applications | 1280 |
| 37.2.1 | Catalyst Performance | 1281 |
| 37.2.2 | Availability and Cost of the Catalyst | 1281 |
| 37.2.3 | Development Time | 1282 |
| 37.3 | Process Development and Equipment | 1283 |
| 37.4 | Industrial Processes: General Comments | 1284 |
| 37.5 | Chemo- and Diastereoselective Hydrogenations | 1286 |
| 37.6 | Enantioselective Hydrogenation of C=C Bonds | 1287 |
| 37.6.1 | Dehydro a-Amino Acid Derivatives | 1287 |
| 37.6.1.1 | L-Dopa (Monsanto, VEB Isis-Chemie) | 1288 |
| 37.6.1.2 | Aspartame (Enichem/Anic, Degussa) | 1289 |
| 37.6.1.3 | Various Pilot- and Bench-Scale Processes for a-Amino Acid Derivatives | 1289 |
| 37.6.2 | Dehydro -Amino Acid Derivatives | 1292 |
| 37.6.3 | Simple Enamides and Enol Acetates | 1293 |
| 37.6.4 | Itaconic Acid Derivatives | 1293 |
| 37.6.5 | Allylic Alcohols and a,b-Unsaturated Acids | 1294 |
| 37.6.5.1 | Allylic Alcohols | 1295 |
| 37.6.5.2 | , -Unsaturated Acids | 1296 |
| 37.6.6 | Miscellaneous C=C Systems | 1298 |
| 37.6.6.1 | Hydrogenation of a Biotin Intermediate (Lonza) | 1299 |
| 37.6.6.2 | Synthesis of (+)-Methyl cis-Dihydrojasmonate (Firmenich) | 1300 |
| 37.6.6.3 | Intermediate for Tipranavir (Chirotech) | 1300 |
| 37.6.6.4 | Various C=C Substrates | 1302 |
| 37.7 | Enantioselective Hydrogenation of C=O Bonds | 1302 |
| 37.7.1 | -Functionalized Ketones | 1302 |
| 37.7.2 | -Functionalized Ketones | 1305 |
| 37.7.3 | Aromatic Ketones | 1307 |
| 37.8 | Enantioselective Hydrogenation of C=N Bonds | 1308 |
| 37.9 | Ligands and Metal Complexes for Large-Scale Applications | 1311 |
| 37.9.1 | Companies Offering Services, Technology, Ligands and Catalysts | 1312 |
| 37.9.2 | Chiral Ligands with Established Industrial Performance | 1313 |
| 37.9.3 | Metal Complexes and Anions | 1313 |
| 37.9.4 | Intellectual Property Aspects | 1317 |
| 37.10 | Conclusions and Future Developments | 1317 |
| | Acknowledgments | 1319 |
| | Abbreviations | 1319 |
| | References | 1319 |
| Part V | Phase Separation in Homogeneous Hydrogenation | |
| 38 | Two-Phase Aqueous Hydrogenations Ferenc Joó and Ágnes Kathó | 1327 |
| 38.1 | Introduction | 1327 |
| 38.2 | Two-Phase Hydrogenation of Alkenes, Alkynes, and Arenes | 1334 |
| 38.3 | Enantioselective Hydrogenation of Alkenes in Two-Phase Aqueous Systems | 1338 |
| 38.4 | Aqueous Two-Phase Hydrogenation of Aldehydes and Ketones | 1344 |
| 38.5 | Aqueous Two-Phase Hydrogenations of Nitro-Compounds, Imines, Nitriles, Oximes, and Heteroaromatics | 1352 |
| 38.6 | Conclusions | 1354 |
| | Abbreviations | 1355 |
| | References | 1355 |
| 39 | Supercritical and Compressed Carbon Dioxide as Reaction Medium and Mass Separating Agent for Hydrogenation Reactions using Organometallic Catalysts Walter Leitner | 1361 |
| 39.1 | Introduction | 1361 |
| 39.2 | The Molecular and Reaction Engineering Basis of Organometallic-Catalyzed Hydrogenations using Compressed and scCO2 | 1362 |
| 39.2.1 | Control of Hydrogen Availability | 1362 |
| 39.2.2 | Catalyst Recycling and Immobilization | 1363 |
| 39.2.2.1 | Solubility Control for Separation | 1364 |
| 39.2.2.2 | Membrane Separation | 1364 |
| 39.2.2.3 | Biphasic Liquid/Supercritical Systems | 1364 |
| 39.2.2.4 | Inverted Biphasic Systems | 1364 |
| 39.2.2.5 | Solid-Supported Catalysts | 1365 |
| 39.2.3 | Catalytic Systems for Hydrogenation using SCFs, and their Synthetic Applications | 1365 |
| 39.2.4 | Mechanistic Aspects | 1371 |
| 39.3 | Conclusions and Outlook | 1373 |
| | Abbreviations | 1374 |
| | References | 1374 |
| 40 | Fluorous Catalysts and Fluorous Phase Catalyst Separation for Hydrogenation Catalysis Elwin de Wolf and Berth-Jan Deelman | 1377 |
| 40.1 | Introduction | 1377 |
| 40.2 | Catalysts Based on Fluorous Alkylphosphines, -Phosphinites, -Phosphonites, and -Phosphites | 1378 |
| 40.3 | Catalysts Based on Perfluoroalkyl-Substituted Arylphosphines | 1380 |
| 40.4 | Fluorous Anions for the Separation of Cationic Hydrogenation Catalysts | 1384 |
| 40.5 | Catalysts Based on Nonphosphorus Ligands | 1386 |
| 40.6 | Enantioselective Hydrogenation Catalysts | 1386 |
| 40.7 | Conclusions | 1386 |
| | Abbreviations | 1387 |
| | References and Notes | 1387 |
| 41 | Catalytic Hydrogenation using Ionic Liquids as Catalyst Phase Peter Wasserscheid and Peter Schulz | 1389 |
| 41.1 | Introduction to Ionic Liquids | 1389 |
| 41.2 | Homogeneous Catalyzed Hydrogenation in Biphasic LiquidLiquid Systems | 1394 |
| 41.2.1 | Hydrogenation of Olefins | 1394 |
| 41.2.2 | Hydrogenation of Arenes | 1397 |
| 41.2.3 | Hydrogenation of Polymers | 1400 |
| 41.2.4 | Stereoselective Hydrogenation | 1401 |
| 41.2.5 | Ketone and Imine Hydrogenation in Ionic Liquids | 1407 |
| 41.2.6 | Imine Hydrogenation | 1411 |
| 41.3 | Homogeneous Catalyzed Hydrogenation in Biphasic Ionic Liquid/Supercritical (sc)CO2 System | 1412 |
| 41.4 | Supported Ionic Liquid Phase Catalysis | 1413 |
| 41.5 | Conclusion | 1416 |
| | Abbreviations | 1417 |
| | References | 1417 |
| 42 | Immobilization Techniques Imre Tóth and Paul C. van Geem | 1421 |
| 42.1 | Introduction | 1421 |
| 42.2 | Engineering and Experimental Aspects | 1422 |
| 42.3 | Immobilization Methods | 1424 |
| 42.3.1 | Physical Methods of Immobilization | 1426 |
| 42.3.1.1 | Physisorption of Metal Complexes | 1427 |
| 42.3.1.2 | Weak Chemisorption: Supported Hydrogen-Bonded (SHB) Catalysts | 1427 |
| 42.3.2 | Encapsulated Homogeneous Catalysts | 1430 |
| 42.3.2.1 | Synthesis of SIB Catalysts | 1431 |
| 42.3.2.2 | Application of SIB Catalysts | 1433 |
| 42.3.3 | Catalysts Entangled in a Polymer | 1434 |
| 42.3.4 | Catalyst Dissolved in a Supported Liquid-Phase | 1435 |
| 42.3.4.1 | Supported Aqueous-Phase Catalysis | 1436 |
| 42.3.4.2 | Hybrid SLP Systems | 1437 |
| 42.3.5 | Covalently Bound Metal Centers | 1438 |
| 42.3.6 | Covalent Attachment of Ligands | 1439 |
| 42.3.6.1 | Grafting to Oxide Supports | 1440 |
| 42.3.6.2 | SolGel Method | 1441 |
| 42.3.6.3 | Anchoring with Organic Phosphonates | 1442 |
| 42.3.6.4 | Attachment to Polymer Supports | 1444 |
| 42.3.6.4.1 | Functionalized Polymers as Supports | 1444 |
| 42.3.6.4.2 | Enzymes as Support | 1448 |
| 42.3.6.4.3 | Functionalized Monomers | 1448 |
| 42.3.6.4.4 | Dendrimers as Supports: Membrane Filtration | 1453 |
| 42.3.6.4.5 | Grafting to Polymers | 1454 |
| 42.3.7 | Ionic Bonding of Metals to Supports | 1455 |
| 42.3.7.1 | Ionically Bound Metal Centers on Inorganic Supports | 1455 |
| 42.3.7.2 | Ionically Bound Metal Centers on Polymer Supports | 1456 |
| 42.3.8 | Attachment of Ligands via Ion Exchange | 1457 |
| 42.4 | Catalyst Deactivation | 1461 |
| 42.5 | Conclusions | 1462 |
| 42.6 | Outlook | 1462 |
| | Abbreviations | 1463 |
| | References | 1463 |
| Part VI | Miscellaneous Topics in Homogeneous Hydrogenation | |
| 43 | Transition Metal-Catalyzed Regeneration of Nicotinamide Cofactors Stephan Lütz | 1471 |
| 43.1 | Introduction | 1471 |
| 43.2 | Enzymatic Cofactor Regeneration | 1474 |
| 43.3 | Electrochemical Cofactor Regeneration | 1475 |
| 43.4 | Chemical Cofactor Regeneration | 1477 |
| 43.5 | Other Chemical Cofactor Regeneration Procedures | 1479 |
| 43.6 | Conclusions and Outlook | 1479 |
| | Acknowledgments | 1480 |
| | Abbreviations | 1480 |
| | References | 1480 |
| 44 | Catalyst Inhibition and Deactivation in Homogeneous Hydrogenation Detlef Heller, André H.M. deVries, and Johannes G. deVries | 1483 |
| 44.1 | Introduction | 1483 |
| 44.2 | Mechanisms of Catalyst Inhibition | 1484 |
| 44.3 | Induction Periods | 1485 |
| 44.3.1 | Introduction | 1485 |
| 44.3.2 | Induction Period Caused by Slow Hydrogenation of COD or NBD | 1486 |
| 44.4 | Substrate and Product Inhibition | 1494 |
| 44.5 | Reversible Inhibition Caused by Materials that can Function as Ligand | 1499 |
| 44.5.1 | Catalyst Deactivation Caused by Solvents | 1500 |
| 44.5.2 | Catalyst Inhibition Caused by Compounds Containing Heteroatoms | 1503 |
| 44.5.3 | Inhibition by CO and sources of CO | 1504 |
| 44.5.4 | Inhibition by Acids and Bases | 1505 |
| 44.6 | Irreversible Deactivation | 1507 |
| 44.6.1 | Inhibition by Anions | 1507 |
| 44.6.2 | Inhibition by Oxidation and by Ligand Modification | 1507 |
| 44.6.3 | Formation of Dimers, Trimers, Clusters, Colloids, and Solids | 1509 |
| 44.7 | Conclusions | 1512 |
| | Abbreviations | 1513 |
| | References | 1513 |
| 45 | Chemical Reaction Engineering Aspects of Homogeneous Hydrogenations Claude de Bellefon and Nathalie Pestre | 1517 |
| 45.1 | Introduction | 1517 |
| 45.2 | Fundamentals | 1518 |
| 45.2.1 | Basics of Mass Transfer in GasLiquid Systems | 1518 |
| 45.2.2 | Physical and Chemical Data for Hydrogenations | 1521 |
| 45.2.2.1 | Heat of Reaction | 1522 |
| 45.2.2.2 | Solubility | 1522 |
| 45.2.2.3 | Diffusivity | 1525 |
| 45.2.3 | Coupling Between Mass Transfer and a Single Homogeneous Irreversible Reaction | 1526 |
| 45.2.4 | Coupling of Reaction and Mass Transfer in Ideal Reactors | 1533 |
| 45.2.4.1 | Mass Balance for a Batch Reactor | 1534 |
| 45.2.4.2 | Mass Balance for a CSTR Reactor | 1535 |
| 45.2.4.2.1 | Simplified Mass Balances | 1535 |
| 45.2.4.3 | Mass Balance for a Plug Flow Reactor | 1536 |
| 45.3 | Industrial Reactor and Scale-Up Issues | 1536 |
| 45.4 | Future Developments | 1541 |
| | Nomenclature | 1542 |
| | Abbreviations | 1544 |
| | References | 1544 |
| | Subject Index | 1547 |
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