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Sakiyama N, Noguchi K, Tanaka K. Rhodium-catalyzed intramolecular cyclization of naphthol- or phenol-linked 1,6-enynes through the cleavage and formation of sp2 C-O bonds. Angew Chem Int Ed Engl 2012; 51:5976-80. [PMID: 22532495 DOI: 10.1002/anie.201201186] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 03/22/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Norifumi Sakiyama
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
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Sakiyama N, Noguchi K, Tanaka K. Rhodium-Catalyzed Intramolecular Cyclization of Naphthol- or Phenol-Linked 1,6-Enynes Through the Cleavage and Formation of sp2CO Bonds. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201186] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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53
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Kunz T, Knochel P. Synthese von funktionalisierten Benzo[b]thiophenen durch intramolekulare Kupfer-katalysierte Carbomagnesierung von Alkinyl(aryl)thioethern. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201106734] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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54
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Kunz T, Knochel P. Synthesis of functionalized benzo[b]thiophenes by the intramolecular copper-catalyzed carbomagnesiation of alkynyl(aryl)thioethers. Angew Chem Int Ed Engl 2012; 51:1958-61. [PMID: 22253072 DOI: 10.1002/anie.201106734] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 11/25/2011] [Indexed: 11/09/2022]
Affiliation(s)
- Thomas Kunz
- Ludwig Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377 München, Germany
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Wu L, Shi M. Yb(OTf)3- or AuI-Catalyzed Domino Intramolecular Hydroamination and Ring-Opening of Sulfonamide-Substituted 1,1-Vinylidenecyclopropanediesters. Chemistry 2011; 17:13160-5. [DOI: 10.1002/chem.201102159] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Indexed: 11/11/2022]
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56
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Döpp R, Lothschütz C, Wurm T, Pernpointner M, Keller S, Rominger F, Hashmi ASK. Gold Catalysis: Hydrolysis of Di(alkoxy)carbenium Ion Intermediates as a Sensor for the Electronic Properties of Gold(I) Complexes. Organometallics 2011. [DOI: 10.1021/om200735c] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- René Döpp
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Christian Lothschütz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Thomas Wurm
- Physikalisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - Markus Pernpointner
- Physikalisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - Sascha Keller
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - A. Stephen K. Hashmi
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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Iwasaki M, Fujino D, Wada T, Kondoh A, Yorimitsu H, Oshima K. Palladium-Catalyzed Alkynylthiolation of Alkynes with Triisopropylsilylethynyl Sulfide. Chem Asian J 2011; 6:3190-4. [DOI: 10.1002/asia.201100643] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Indexed: 11/09/2022]
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Kuhn M, Falk FC, Paradies J. Palladium-Catalyzed C–S Coupling: Access to Thioethers, Benzo[b]thiophenes, and Thieno[3,2-b]thiophenes. Org Lett 2011; 13:4100-3. [DOI: 10.1021/ol2016093] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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59
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Hashmi ASK, Yang W, Rominger F. Gold(I)-katalysierte Synthese von Benzo[b]furanen aus 3-Silyloxy-1,5-eninen. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100989] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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60
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Hashmi ASK, Yang W, Rominger F. Gold(I)-Catalyzed Formation of Benzo[b]furans from 3-Silyloxy-1,5-enynes. Angew Chem Int Ed Engl 2011; 50:5762-5. [DOI: 10.1002/anie.201100989] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Indexed: 11/09/2022]
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61
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Samanta R, Antonchick AP. Palladium-katalysierte, Sulfoxid-dirigierte doppelte C-H-Aktivierung zur Synthese von Dibenzothiophenen. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100775] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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62
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Samanta R, Antonchick AP. Palladium-Catalyzed Double CH Activation Directed by Sulfoxides in the Synthesis of Dibenzothiophenes. Angew Chem Int Ed Engl 2011; 50:5217-20. [DOI: 10.1002/anie.201100775] [Citation(s) in RCA: 153] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2011] [Indexed: 01/21/2023]
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63
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Hashmi ASK, Loos A, Doherty S, Knight JG, Robson KJ, Rominger F. Gold-Catalyzed Cyclizations: A Comparative Study of ortho,ortho′-Substituted KITPHOS Monophosphines with their Biaryl Monophosphine Counterpart SPHOS. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000879] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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64
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Antoniotti S, Dalla V, Duñach E. Metalltriflimidate sind bessere Katalysatoren für die organische Synthese als Metalltriflate - der Effekt eines stark delokalisierten Gegenions. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200906407] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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65
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Antoniotti S, Dalla V, Duñach E. Metal Triflimidates: Better than Metal Triflates as Catalysts in Organic Synthesis-The Effect of a Highly Delocalized Counteranion. Angew Chem Int Ed Engl 2010; 49:7860-88. [PMID: 20715025 DOI: 10.1002/anie.200906407] [Citation(s) in RCA: 150] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sylvain Antoniotti
- LCMBA. UMR 6001, Université de Nice-Sophia Antipolis, C.N.R.S. Institut de Chimie de Nice, 28, avenue de Valrose, 06108 F. Nice, France
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66
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Brenzovich WE, Benitez D, Lackner AD, Shunatona HP, Tkatchouk E, Goddard WA, Toste FD. Gold-catalyzed intramolecular aminoarylation of alkenes: C-C bond formation through bimolecular reductive elimination. Angew Chem Int Ed Engl 2010; 49:5519-22. [PMID: 20602396 PMCID: PMC3433283 DOI: 10.1002/anie.201002739] [Citation(s) in RCA: 227] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- W. E. Brenzovich
- Department of Chemistry University of California, Berkeley Berkeley, CA 94720 (USA
| | - D. Benitez
- Materials and Process Simulation Center California Institute of Technology Pasadena, CA 02215 (USA)
| | - A. D. Lackner
- Department of Chemistry University of California, Berkeley Berkeley, CA 94720 (USA
| | - H. P. Shunatona
- Department of Chemistry University of California, Berkeley Berkeley, CA 94720 (USA
| | - E. Tkatchouk
- Materials and Process Simulation Center California Institute of Technology Pasadena, CA 02215 (USA)
| | - W. A. Goddard
- Materials and Process Simulation Center California Institute of Technology Pasadena, CA 02215 (USA)
| | - F. Dean Toste
- Department of Chemistry University of California, Berkeley Berkeley, CA 94720 (USA
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67
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Brenzovich WE, Benitez D, Lackner AD, Shunatona HP, Tkatchouk E, Goddard WA, Toste F. Gold-Catalyzed Intramolecular Aminoarylation of Alkenes: CC Bond Formation through Bimolecular Reductive Elimination. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201002739] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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68
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Kienle M, Unsinn A, Knochel P. Synthesis of Dibenzothiophenes and Related Classes of Heterocycles by Using Functionalized Dithiocarbamates. Angew Chem Int Ed Engl 2010; 49:4751-4. [DOI: 10.1002/anie.201001025] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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69
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Kienle M, Unsinn A, Knochel P. Synthese von Dibenzothiophenen und verwandten Heterocyclenklassen unter Verwendung funktionalisierter Dithiocarbamate. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201001025] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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70
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Matsnev A, Noritake S, Nomura Y, Tokunaga E, Nakamura S, Shibata N. Efficient access to extended Yagupolskii-Umemoto-type reagents: triflic acid catalyzed intramolecular cyclization of ortho-ethynylaryltrifluoromethylsulfanes. Angew Chem Int Ed Engl 2010; 49:572-6. [PMID: 20014375 DOI: 10.1002/anie.200905225] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Andrej Matsnev
- Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan
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71
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Matsnev A, Noritake S, Nomura Y, Tokunaga E, Nakamura S, Shibata N. Efficient Access to Extended YagupolskiiâUmemoto-Type Reagents: Triflic Acid Catalyzed Intramolecular Cyclization ofortho-Ethynylaryltrifluoromethylsulfanes. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200905225] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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72
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Bhuvaneswari S, Jeganmohan M, Cheng CH. Platinum-Catalyzed Multi-Step Reaction of Propargyl Alcohols withN-Heteroaromatics. Chem Asian J 2010; 5:141-6. [DOI: 10.1002/asia.200900318] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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73
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An S, Jeong J, Baskar B, Lee J, Seo J, Rhee Y. Gold(I)-Catalyzed Synthesis of Highly Substituted 2-Cyclopentenones from 5-Siloxypent-3-en-1-ynes. Chemistry 2009; 15:11837-41. [DOI: 10.1002/chem.200901824] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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74
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Hashmi AS, Pankajakshan S, Rudolph M, Enns E, Bander T, Rominger F, Frey W. Gold Catalysis: Anellated Heterocycles and Dependency of the Reaction Pathway on the Tether Length. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900614] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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75
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Sato T, Nakamura I, Terada M. Platinum-Catalyzed Multisubstituted Benzo[b]selenophene Synthesis. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900894] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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76
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Davies P, Albrecht SC. Gold- or Platinum-Catalyzed Synthesis of Sulfur Heterocycles: Access to Sulfur Ylides without Using Sacrificial Functionality. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200904309] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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77
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Davies P, Albrecht SC. Gold- or Platinum-Catalyzed Synthesis of Sulfur Heterocycles: Access to Sulfur Ylides without Using Sacrificial Functionality. Angew Chem Int Ed Engl 2009; 48:8372-5. [DOI: 10.1002/anie.200904309] [Citation(s) in RCA: 126] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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78
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Bryan C, Braunger J, Lautens M. Efficient Synthesis of Benzothiophenes by an Unusual Palladium-Catalyzed Vinylic CS Coupling. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200902843] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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79
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Bryan C, Braunger J, Lautens M. Efficient Synthesis of Benzothiophenes by an Unusual Palladium-Catalyzed Vinylic CS Coupling. Angew Chem Int Ed Engl 2009; 48:7064-8. [DOI: 10.1002/anie.200902843] [Citation(s) in RCA: 180] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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80
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Hashmi A, Rudolph M, Huck J, Frey W, Bats J, Hamzić M. Gold Catalysis: Switching the Pathway of the Furan-Yne Cyclization. Angew Chem Int Ed Engl 2009; 48:5848-52. [DOI: 10.1002/anie.200900887] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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81
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82
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Nakamura I, Chan CS, Araki T, Terada M, Yamamoto Y. Stereochemical Control by an Ester Group or Olefin Ligand in Platinum-Catalyzed Carboalkoxylation of 6-(1-Alkoxyethoxy)- hex-2-ynoates. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200800772] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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83
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Belting V, Krause N. Gold-catalyzed cycloisomerization of alk-4-yn-1-ones. Org Biomol Chem 2009; 7:1221-5. [DOI: 10.1039/b819704k] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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84
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Schuler M, Silva F, Bobbio C, Tessier A, Gouverneur V. Gold(I)-Catalyzed Alkoxyhalogenation of β-Hydroxy-α,α-Difluoroynones. Angew Chem Int Ed Engl 2008; 47:7927-30. [DOI: 10.1002/anie.200802162] [Citation(s) in RCA: 142] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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85
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Schuler M, Silva F, Bobbio C, Tessier A, Gouverneur V. Gold(I)-Catalyzed Alkoxyhalogenation of β-Hydroxy-α,α-Difluoroynones. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200802162] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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86
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Takaya J, Udagawa S, Kusama H, Iwasawa N. Synthesis of N-Fused Tricyclic Indoles by a Tandem [1,2] Stevens-Type Rearrangement/1,2-Alkyl Migration of Metal-Containing Ammonium Ylides. Angew Chem Int Ed Engl 2008; 47:4906-9. [DOI: 10.1002/anie.200705517] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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87
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Takaya J, Udagawa S, Kusama H, Iwasawa N. Synthesis of N-Fused Tricyclic Indoles by a Tandem [1,2] Stevens-Type Rearrangement/1,2-Alkyl Migration of Metal-Containing Ammonium Ylides. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200705517] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Shu XZ, Liu XY, Ji KG, Xiao HQ, Liang YM. Au-Catalyzed Tandem Cyclization/[1,2]-Alkyl Migration Reaction of Epoxy Alkynes: Synthesis of Spiropyranones. Chemistry 2008; 14:5282-9. [DOI: 10.1002/chem.200800194] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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89
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Bae H, Baskar B, An S, Cheong J, Thangadurai D, Hwang IC, Rhee Y. Gold(I)-Catalyzed Cycloisomerization of 3-Methoxy-1,6-enynes Featuring Tandem Cyclization and [3,3]-Sigmatropic Rearrangement. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200705117] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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90
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Bae H, Baskar B, An S, Cheong J, Thangadurai D, Hwang IC, Rhee Y. Gold(I)-Catalyzed Cycloisomerization of 3-Methoxy-1,6-enynes Featuring Tandem Cyclization and [3,3]-Sigmatropic Rearrangement. Angew Chem Int Ed Engl 2008; 47:2263-6. [DOI: 10.1002/anie.200705117] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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91
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Nakamura I, Yamagishi U, Song D, Konta S, Yamamoto Y. Synthesis of 3- and 6-Sulfonylindoles fromortho-Alkynyl-N-sulfonylanilines by the Use of Lewis Acidic Transition-Metal Catalysts. Chem Asian J 2008; 3:285-95. [DOI: 10.1002/asia.200700278] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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92
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Li G, Huang X, Zhang L. Platinum-Catalyzed Formation of Cyclic-Ketone-Fused Indoles fromN-(2-Alkynylphenyl)lactams. Angew Chem Int Ed Engl 2008; 47:346-9. [DOI: 10.1002/anie.200702931] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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93
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Li G, Huang X, Zhang L. Platinum-Catalyzed Formation of Cyclic-Ketone-Fused Indoles fromN-(2-Alkynylphenyl)lactams. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200702931] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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94
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Bhuvaneswari S, Jeganmohan M, Cheng CH. Platinum-Catalyzed Multistep Reactions of Indoles with Alkynyl Alcohols. Chemistry 2007; 13:8285-93. [PMID: 17721891 DOI: 10.1002/chem.200700589] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
PtCl2 effectively catalyzes the multistep reaction of N-methyl indole (1 a) with pent-3-yn-1-ol (2 a) in THF at room temperature for 2 h to give indole derivative 3 a, which contains a five-membered cyclic ether group at C3 in 93% yield. Under similar reaction conditions, various substituted N-methyl indoles 1 b-h and indole (1 i) reacted efficiently with 2 a to afford the corresponding indole derivatives 3 b-h and 3 i in 48-91 and 72% yields. The results showed that N-methyl indoles with electron-donating substituents were more reactive affording higher product yields than those with electron-withdrawing groups. Likewise, various substituted but-3-yn-1-ols 2 b-e and other longer chain alkynyl alcohols 2 f-i also underwent a cyclization-addition reaction with N-methyl indole (1 a) to provide the corresponding cyclization-addition products 3 j-m and 3 a, 3 j, and 3 n-o in good to excellent yields. The present platinum-catalyzed cyclization-addition reaction can be further extended into N-methyl pyrrole. Mechanistically, the catalytic reaction proceeds by an intramolecular hydroalkoxylation of alkynyl alcohol to afford cyclic enol ether followed by the addition of the C--H bond of indole to the unsaturated moiety of cyclic enol ether providing the final product. Experimental evidence to support this proposed mechanism is provided.
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95
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Fürstner A, Davies PW. Catalytic carbophilic activation: catalysis by platinum and gold pi acids. Angew Chem Int Ed Engl 2007; 46:3410-49. [PMID: 17427893 DOI: 10.1002/anie.200604335] [Citation(s) in RCA: 2033] [Impact Index Per Article: 119.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The ability of platinum and gold catalysts to effect powerful atom-economic transformations has led to a marked increase in their utilization. The quite remarkable correlation of their catalytic behavior with the available structural data, coordination chemistry, and organometallic reactivity patterns, including relativistic effects, allows the underlying principles of catalytic carbophilic activation by pi acids to be formulated. The spectrum of reactivity extends beyond their utility as catalytic and benign alternatives to conventional stoichiometric pi acids. The resulting reactivity profile allows this entire field of catalysis to be rationalized, and brings together the apparently disparate electrophilic metal carbene and nonclassical carbocation explanations. The advances in coupling, cycloisomerization, and structural reorganization--from the design of new transformations to the improvement to known reactions--are highlighted in this Review. The application of platinum- and gold-catalyzed transformations in natural product synthesis is also discussed.
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Affiliation(s)
- Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany.
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96
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Affiliation(s)
- A Stephen K Hashmi
- Institut für Organische Chemie, Universität Stuttgart, 70569 Stuttgart, Germany.
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Fürstner A, Davies P. Katalytische carbophile Aktivierung: Platin- und Gold-π-Säuren als Katalysatoren. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604335] [Citation(s) in RCA: 924] [Impact Index Per Article: 54.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Nakamura I, Yamagishi U, Song D, Konta S, Yamamoto Y. Gold- and Indium-Catalyzed Synthesis of 3- and 6-Sulfonylindoles fromortho-Alkynyl-N-sulfonylanilines. Angew Chem Int Ed Engl 2007; 46:2284-7. [PMID: 17348072 DOI: 10.1002/anie.200604038] [Citation(s) in RCA: 187] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Itaru Nakamura
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
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Nakamura I, Yamagishi U, Song D, Konta S, Yamamoto Y. Gold- and Indium-Catalyzed Synthesis of 3- and 6-Sulfonylindoles fromortho-Alkynyl-N-sulfonylanilines. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604038] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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