101
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Nishimura T, Noishiki A, Ebe Y, Hayashi T. Hydroxorhodium/Chiral Diene Complexes as Effective Catalysts for the Asymmetric Arylation of 3-Aryl-3-hydroxyisoindolin-1-ones. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201208593] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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102
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Nishimura T, Noishiki A, Ebe Y, Hayashi T. Hydroxorhodium/Chiral Diene Complexes as Effective Catalysts for the Asymmetric Arylation of 3-Aryl-3-hydroxyisoindolin-1-ones. Angew Chem Int Ed Engl 2013; 52:1777-80. [DOI: 10.1002/anie.201208593] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Indexed: 11/10/2022]
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103
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Nishimura T, Ebe Y, Fujimoto H, Hayashi T. Asymmetric synthesis of gem-diaryl substituted cyclic sulfamidates and sulfamides by rhodium-catalyzed arylation of cyclic ketimines. Chem Commun (Camb) 2013; 49:5504-6. [DOI: 10.1039/c3cc42071j] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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104
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Kumagai N, Shibasaki M. Asymmetrische Katalyse mit Bis(hydroxyphenyl)diamid/Seltenerdmetall-Komplexen. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206582] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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105
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Asymmetric Catalysis with Bis(hydroxyphenyl)diamides/Rare-Earth Metal Complexes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/anie.201206582] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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106
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Chen J, Lu X, Lou W, Ye Y, Jiang H, Zeng W. Palladium(II)-Catalyzed Enantioselective Arylation of α-Imino Esters. J Org Chem 2012; 77:8541-8. [DOI: 10.1021/jo301423e] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiayan Chen
- School
of Chemistry and Chemical Engineering, South China University of Technology, No. 381, Wushan
Road, Tianhe District, Guangzhou 510640, People's Republic of China
| | - Xiaoxia Lu
- Chengdu Institute of Biology, Academy of Sciences, Chengdu 610041, People's
Republic of China
| | - Wenyong Lou
- College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640,
People's Republic of China
| | - Yong Ye
- School
of Chemistry and Chemical Engineering, South China University of Technology, No. 381, Wushan
Road, Tianhe District, Guangzhou 510640, People's Republic of China
| | - Huanfeng Jiang
- School
of Chemistry and Chemical Engineering, South China University of Technology, No. 381, Wushan
Road, Tianhe District, Guangzhou 510640, People's Republic of China
| | - Wei Zeng
- School
of Chemistry and Chemical Engineering, South China University of Technology, No. 381, Wushan
Road, Tianhe District, Guangzhou 510640, People's Republic of China
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107
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Wu Y, Deng L. Asymmetric synthesis of trifluoromethylated amines via catalytic enantioselective isomerization of imines. J Am Chem Soc 2012; 134:14334-7. [PMID: 22906148 PMCID: PMC3475161 DOI: 10.1021/ja306771n] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new approach toward the asymmetric synthesis of optically active trifluoromethylated amines was enabled by an unprecedented, highly enantioselective catalytic isomerization of trifluoromethyl imines with a new chiral organic catalyst. Not only aryl but also alkyl trifluoromethylated amines could be obtained in high enantioselectivities.
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Affiliation(s)
- Yongwei Wu
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02454-9110
| | - Li Deng
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02454-9110
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108
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Tolstoy P, Lee SXY, Sparr C, Ley SV. Synthesis of Enantiomerically Enriched 3-Amino-2-oxindoles through a Palladium-Mediated Asymmetric Intramolecular Arylation of α-Ketimino Amides. Org Lett 2012; 14:4810-3. [DOI: 10.1021/ol302119j] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Päivi Tolstoy
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, United Kingdom
| | - Samantha X. Y. Lee
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, United Kingdom
| | - Christof Sparr
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, United Kingdom
| | - Steven V. Ley
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, United Kingdom
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109
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Yang G, Shen C, Zhang W. An Asymmetric Aerobic Aza-Wacker-Type Cyclization: Synthesis of Isoindolinones Bearing Tetrasubstituted Carbon Stereocenters. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203693] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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110
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Yang G, Shen C, Zhang W. An Asymmetric Aerobic Aza-Wacker-Type Cyclization: Synthesis of Isoindolinones Bearing Tetrasubstituted Carbon Stereocenters. Angew Chem Int Ed Engl 2012; 51:9141-5. [DOI: 10.1002/anie.201203693] [Citation(s) in RCA: 142] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Revised: 07/09/2012] [Indexed: 11/10/2022]
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111
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Kang SY, Ko YK, Park KJ, Park YS. Asymmetric Preparation of D-Phg-L-Pro Dipeptide-derived Chiral Ligands for Enantioselective Addition of Diethylzinc to Aldehydes. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.7.2397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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112
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Nishimura T, Ashouri A, Ebe Y, Maeda Y, Hayashi T. Rhodium/chiral diene-catalyzed asymmetric methylation of N-sulfonylarylimines with trimethylboroxine. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.04.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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113
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Nishimura T, Noishiki A, Chit Tsui G, Hayashi T. Asymmetric Synthesis of (Triaryl)methylamines by Rhodium-Catalyzed Addition of Arylboroxines to Cyclic N-Sulfonyl Ketimines. J Am Chem Soc 2012; 134:5056-9. [DOI: 10.1021/ja300697c] [Citation(s) in RCA: 194] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Takahiro Nishimura
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Akira Noishiki
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Gavin Chit Tsui
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Tamio Hayashi
- Department of Chemistry,
Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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114
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Kang SY, Park YS. Discovery of Dipeptide-Derived Catalysts for the Enantioselective Addition of Dimethylzinc to Aldehydes. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200063] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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115
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Kano T, Song S, Kubota Y, Maruoka K. Highly diastereo- and enantioselective Mannich reactions of synthetically flexible ketimines with secondary amine organocatalysts. Angew Chem Int Ed Engl 2011; 51:1191-4. [PMID: 22173941 DOI: 10.1002/anie.201107375] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Revised: 11/21/2011] [Indexed: 11/06/2022]
Affiliation(s)
- Taichi Kano
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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116
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Kano T, Song S, Kubota Y, Maruoka K. Highly Diastereo- and Enantioselective Mannich Reactions of Synthetically Flexible Ketimines with Secondary Amine Organocatalysts. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201107375] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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117
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Scott HK, Aggarwal VK. Highly Enantioselective Synthesis of Tertiary Boronic Esters and their Stereospecific Conversion to other Functional Groups and Quaternary Stereocentres. Chemistry 2011; 17:13124-32. [DOI: 10.1002/chem.201102581] [Citation(s) in RCA: 149] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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118
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Hata S, Koyama H, Shimizu M. Synthesis of α,α-Disubstituted α-Amino Esters: Nucleophilic Addition to Iminium Salts Generated from Amino Ketene Silyl Acetals. J Org Chem 2011; 76:9670-7. [DOI: 10.1021/jo201692x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shingo Hata
- Department of Chemistry
for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Hiroshi Koyama
- Department of Chemistry
for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Makoto Shimizu
- Department of Chemistry
for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
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119
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Righi M, Bartoccini F, Lucarini S, Piersanti G. Organocatalytic synthesis of α-quaternary amino acid derivatives via aza-Friedel–Crafts alkylation of indoles with simple α-amidoacrylates. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.08.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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120
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Jiang H, Gschwend B, Albrecht Ł, Hansen SG, Jørgensen KA. Asymmetric trienamine catalysis for the construction of structurally rigid cyclic α,α-disubstituted amino acid derivatives. Chemistry 2011; 17:9032-6. [PMID: 21744409 DOI: 10.1002/chem.201101539] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Indexed: 11/05/2022]
Affiliation(s)
- Hao Jiang
- Center for Catalysis, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
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121
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Liu YL, Shi TD, Zhou F, Zhao XL, Wang X, Zhou J. Organocatalytic asymmetric Strecker reaction of di- and trifluoromethyl ketoimines. Remarkable fluorine effect. Org Lett 2011; 13:3826-9. [PMID: 21718056 DOI: 10.1021/ol201316z] [Citation(s) in RCA: 155] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly enantioselective Strecker reaction of difluoromethyl and trifluoromethyl ketoimines was developed. Remarkable fluorine effect on the reactivity and selectivity is observed and discussed.
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Affiliation(s)
- Yun-Lin Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai 200062, PR China
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122
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Shintani R, Takeda M, Soh YT, Ito T, Hayashi T. Rhodium-catalyzed asymmetric addition of potassium organotrifluoroborates to N-sulfonyl ketimines. Org Lett 2011; 13:2977-9. [PMID: 21574614 DOI: 10.1021/ol200958q] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A rhodium-catalyzed asymmetric addition of readily available potassium organotrifluoroborates to both N-tosyl and N-nosyl ketimines has been developed. High enantioselectivity has been achieved by using a chiral diene ligand, and the nosyl group of the addition products can be easily removed while retaining the enantiomeric purity.
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Affiliation(s)
- Ryo Shintani
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan.
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123
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Huang G, Yang J, Zhang X. Highly enantioselective zinc/BINOL-catalyzed alkynylation of α-ketoimine ester: a new entry to optically active quaternary α-CF3 α-amino acids. Chem Commun (Camb) 2011; 47:5587-9. [PMID: 21465056 DOI: 10.1039/c1cc10403a] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An effective method for highly enantioselective alkynylation of ketoimine (α-trifluoromethyl ketoimine ester) has been developed via a zinc/BINOL catalyzed process. This protocol provides a useful and facile access to optically active quaternary α-trifluoromethyl α-amino acids and related derivatives of interest in life sciences.
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Affiliation(s)
- Gaochao Huang
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 3, 45 Lingling Road, Shanghai 200032, China
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124
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Kobayashi S, Mori Y, Fossey JS, Salter MM. Catalytic Enantioselective Formation of C−C Bonds by Addition to Imines and Hydrazones: A Ten-Year Update. Chem Rev 2011; 111:2626-704. [DOI: 10.1021/cr100204f] [Citation(s) in RCA: 761] [Impact Index Per Article: 58.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shu̅ Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yuichiro Mori
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - John S. Fossey
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Matthew M. Salter
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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125
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Rudolphi F, Song B, Gooßen LJ. Synthesis of Azomethines from α-Oxocarboxylates, Amines and Aryl Bromides via One-Pot Three-Component Decarboxylative Coupling. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000798] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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126
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Armstrong A, Emmerson DPG. Enantioselective Synthesis of α-Alkyl,α-Vinyl Amino Acids via [2,3]-Sigmatropic Rearrangement of Selenimides. Org Lett 2011; 13:1040-3. [DOI: 10.1021/ol1030926] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alan Armstrong
- Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, U.K
| | - Daniel P. G. Emmerson
- Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, U.K
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127
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Chuang KV, Navarro R, Reisman SE. Benzoquinone-derived sulfinyl imines as versatile intermediates for alkaloid synthesis: Total synthesis of (–)-3-demethoxyerythratidinone. Chem Sci 2011. [DOI: 10.1039/c1sc00095k] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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128
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Bower JF, Krische MJ. Formation of C-C Bonds via Iridium-Catalyzed Hydrogenation and Transfer Hydrogenation. TOP ORGANOMETAL CHEM 2011; 34:107-138. [PMID: 21822399 PMCID: PMC3149833 DOI: 10.1007/978-3-642-15334-1_5] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The formation of C-C bonds via catalytic hydrogenation and transfer hydrogenation enables carbonyl and imine addition in the absence of stoichiometric organometallic reagents. In this review, iridium-catalyzed C-C bond-forming hydrogenations and transfer hydrogenations are surveyed. These processes encompass selective, atom-economic methods for the vinylation and allylation of carbonyl compounds and imines. Notably, under transfer hydrogenation conditions, alcohol dehydrogenation drives reductive generation of organoiridium nucleophiles, enabling carbonyl addition from the aldehyde or alcohol oxidation level. In the latter case, hydrogen exchange between alcohols and π-unsaturated reactants generates electrophile-nucleophile pairs en route to products of hydro-hydroxyalkylation, representing a direct method for the functionalization of carbinol C-H bonds.
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Affiliation(s)
- John F Bower
- Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station - A5300, Austin, TX 78712-0165, USA and Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford 1 3TA, UK
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129
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Synthesis of Highly Enantioenriched C-Tertiary Amines From Boronic Esters: Application to the Synthesis of Igmesine. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201006037] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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130
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Bagutski V, Elford TG, Aggarwal VK. Synthesis of Highly Enantioenriched C-Tertiary Amines From Boronic Esters: Application to the Synthesis of Igmesine. Angew Chem Int Ed Engl 2010; 50:1080-3. [DOI: 10.1002/anie.201006037] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Indexed: 11/06/2022]
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131
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Kumar A, Samuelson AG. Catalytic reactions of titanium alkoxides with Grignard reagents and imines: a mechanistic study. Chem Asian J 2010; 5:1830-7. [PMID: 20564277 DOI: 10.1002/asia.200900711] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The reactivity of Grignard reagents towards imines in the presence of catalytic and stoichiometric amounts of titanium alkoxides is reported. Alkylation, reduction, and coupling of imines take place. Whereas reductive coupling is the major reaction in stoichiometric reactions, alkylation is favored in catalytic reactions. Mechanistic studies clearly indicate that intermediates involved in the two reactions are different. Catalytic reactions involve a metal-alkyl complex. This has been confirmed by reactions of deuterium-labeled substrates and different alkylating agents. Under the stoichiometric conditions, however, titanium olefin complexes are formed through reductive elimination, probably through a multinuclear intermediate.
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Affiliation(s)
- Akshai Kumar
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
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132
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Nie J, Guo HC, Cahard D, Ma JA. Asymmetric construction of stereogenic carbon centers featuring a trifluoromethyl group from prochiral trifluoromethylated substrates. Chem Rev 2010; 111:455-529. [PMID: 21117644 DOI: 10.1021/cr100166a] [Citation(s) in RCA: 875] [Impact Index Per Article: 62.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jing Nie
- Department of Chemistry, Tianjin University, China
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133
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Gross PJ, Furche F, Nieger M, Bräse S. Asymmetric total synthesis of (+)-fumimycin via 1,2-addition to ketimines. Chem Commun (Camb) 2010; 46:9215-7. [PMID: 21031188 DOI: 10.1039/c0cc03399e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first asymmetric total synthesis of fumimycin was accomplished. As a key step, a 1,2-addition of methyl Grignard reagents to ketimines with quinine as additive was employed. The absolute configuration of (+)-fumimycin was determined by CD-spectroscopy combined with time-dependent density functional calculations.
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Affiliation(s)
- Patrick J Gross
- Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
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134
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Shintani R, Takeda M, Tsuji T, Hayashi T. Rhodium-Catalyzed Asymmetric Arylation ofN-Tosyl Ketimines. J Am Chem Soc 2010; 132:13168-9. [DOI: 10.1021/ja106114q] [Citation(s) in RCA: 130] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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135
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Affiliation(s)
- Patrick J. Gross
- Institut für Organische Chemie, Karlsruher Institut für Technologie (KIT), Fritz‐Haber‐Weg 6, 76131 Karlsruhe (Germany), Fax: (+49) 721‐608‐8581
| | - Stefan Bräse
- Institut für Organische Chemie, Karlsruher Institut für Technologie (KIT), Fritz‐Haber‐Weg 6, 76131 Karlsruhe (Germany), Fax: (+49) 721‐608‐8581
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136
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Jeganmohan M, Knochel P. tmp4Zr: eine atomökonomische Base zur Metallierung von funktionalisierten Arenen und Heteroarenen. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201003558] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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137
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Jeganmohan M, Knochel P. tmp4Zr: An Atom-Economical Base for the Metalation of Functionalized Arenes and Heteroarenes. Angew Chem Int Ed Engl 2010; 49:8520-4. [DOI: 10.1002/anie.201003558] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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138
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Allendörfer N, Sudau A, Bräse S. Expedient Trimethylaluminium-Promoted One-Pot Synthesis of Functional Heteroaromatic and Carbocyclic Trifluoroethylamines. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000188] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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139
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Li CL, Chen MW, Zhang XG. Synthesis of N-aryl trifluoromethylarylketoimines by palladium-catalyzed Suzuki coupling reaction of N-aryltrifluoroacetimidoyl chlorides with aryl boronic acids. J Fluor Chem 2010. [DOI: 10.1016/j.jfluchem.2010.04.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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140
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Liu WB, He H, Dai LX, You SL. A One-Pot Palladium-Catalyzed Allylic Alkylation and Wittig Reaction of Phosphorus Ylides. Chemistry 2010; 16:7376-9. [DOI: 10.1002/chem.201000316] [Citation(s) in RCA: 29] [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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141
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Sun ZM, Chen SP, Zhao P. Tertiary Carbinamine Synthesis by Rhodium-Catalyzed [3+2] Annulation of N-Unsubstituted Aromatic Ketimines and Alkynes. Chemistry 2010; 16:2619-27. [DOI: 10.1002/chem.200902814] [Citation(s) in RCA: 148] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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142
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Colpaert F, Mangelinckx S, Leemans E, Denolf B, De Kimpe N. Asymmetric synthesis of new chiral N-sulfinyl 2,2-disubstituted aziridines by Grignard additions across α-chloro N-sulfinyl ketimines. Org Biomol Chem 2010; 8:3251-8. [DOI: 10.1039/c001471k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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143
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Hsu DC, Lam PCH, Slebodnick C, Carlier PR. Complete mapping of the stereochemical course of retentive deprotonation/alkylation of 1H-benzo[e][1,4]diazepin-2(3H)-ones. J Am Chem Soc 2009; 131:18168-76. [PMID: 19921816 DOI: 10.1021/ja907507j] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Enantiopure amino-acid derived 1H-benzo[e][1,4]diazepin-2(3H)-ones (BZDs) undergo highly retentive deprotonation/alkylation reactions. To confirm the role of stereolabile, axially chiral intermediates in these reactions and to determine the precise stereochemical course of deprotonation and alkylation, a new alanine-derived BZD (S)-1d was prepared. Because of slow diazepine ring inversion of the C3-alkylated derivatives of 1d, it proved possible to determine that electrophiles react at the concave face of the enolate derived from 1d. Furthermore, an enantiopure silyl enol ether derivative of (S)-1d was prepared and characterized by X-ray crystallography, confirming that deprotonation resulted in an (M)-configured axially chiral enolate. Activation parameters for diazepine ring inversion in the potassium enolate of 1d were determined experimentally and are well-matched by density functional calculations. Finally, the factors leading to concave-face alkylation of the enolate derived from 1d are analyzed based on calculated alkylation transition structures. Minimization of torsional effects at the BZD ring fusion and maximization of imine and amide resonance are proposed to favor concave-face alkylation.
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Affiliation(s)
- Danny C Hsu
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA
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144
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Lee Y, Li B, Hoveyda AH. Stereogenic-at-metal Zn- and Al-based N-heterocyclic carbene (NHC) complexes as bifunctional catalysts in Cu-free enantioselective allylic alkylations. J Am Chem Soc 2009; 131:11625-33. [PMID: 19630406 DOI: 10.1021/ja904654j] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Investigations detailed herein demonstrate the ability of chiral bidentate N-heterocyclic carbenes to promote directly-without the need for a Cu salt-site- and enantioselective C-C bond forming reactions. Within this context, catalytic allylic alkylations of various allylic phosphates with dialkylzinc and trialkylaluminum reagents, performed with chiral bidentate imidazolinium salts and in the absence of a Cu salt, are described. The Cu-free transformations deliver products bearing tertiary or (all-carbon) quaternary stereogenic centers with exceptional site- (>98:<2 S(N)2':S(N)2) and high enantioselectivity [up to 97.5:2.5 enantiomer ratio (er)]. A chiral Zn-based N-heterocyclic carbene (NHC) complex, which serves as the catalyst for the enantioselective allylic alkylation reactions, is isolated and fully characterized. Spectroscopic and X-ray crystallographic studies indicate that the sulfonate group within the stereogenic-at-Zn bidentate complexes coordinates syn to the proximal phenyl substituent of the NHC backbone (vs the initially expected anti). Investigations regarding a related NHC-Al complex reveal similar structural attributes. The studies outlined provide a plausible rationale regarding the mechanism of Cu-free allylic alkylation reactions that involve dialkylzinc or trialkylaluminum reagents as well as the previously reported alkylmagnesium halides. On the basis of the research disclosed, it is proposed that bidentate metal-carbene complexes can serve as effective bifunctional catalysts, a critical attribute that differentiates such NHC-based complexes from the corresponding monodentate variants.
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Affiliation(s)
- Yunmi Lee
- Department of Chemistry, Merkert Chemistry Center, Boston College Chestnut Hill, Massachusetts 02467, USA
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145
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Gross PJ, Hartmann CE, Nieger M, Bräse S. Synthesis of Methoxyfumimycin with 1,2-Addition to Ketimines. J Org Chem 2009; 75:229-32. [DOI: 10.1021/jo902026s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Patrick J. Gross
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
| | - Caroline E. Hartmann
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
| | - Martin Nieger
- Laboratory of Inorganic Chemistry, University of Helsinki, 00014 Helsinki, Finland
| | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
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146
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Dickstein JS, Fennie MW, Norman AL, Paulose BJ, Kozlowski MC. Three component coupling of alpha-iminoesters via umpolung addition of organometals: synthesis of alpha,alpha-disubstituted alpha-amino acids. J Am Chem Soc 2009; 130:15794-5. [PMID: 18983153 DOI: 10.1021/ja8073006] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis of alpha,alpha-disubstituted alpha-amino acids by means of a three component coupling is reported. The coupling occurs through umpolung addition of organometallic reagents to the nitrogen of alpha-iminoesters. The resulting enolate intermediates subsequently react with electrophiles (aldehydes, imines, alpha,beta-unsaturated nitro, alkyl halides, acyl cyanides) to form a quaternary center. Tethering of the electrophile and nucleophile components provides cyclic alpha,alpha-disubstituted alpha-amino acid derivatives.
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Affiliation(s)
- Joshua S Dickstein
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
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147
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Wieland LC, Vieira EM, Snapper ML, Hoveyda AH. Ag-catalyzed diastereo- and enantioselective vinylogous Mannich reactions of alpha-ketoimine esters. Development of a method and investigation of its mechanism. J Am Chem Soc 2009; 131:570-6. [PMID: 18980303 DOI: 10.1021/ja8062315] [Citation(s) in RCA: 154] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient diastereo- and enantioselective Ag-catalyzed method for additions of a commercially available siloxyfuran to alpha-ketoimine esters is disclosed. Catalytic transformations require an inexpensive metal salt (AgOAc) and an air stable chiral ligand that is prepared in three steps from commercially available materials in 42% overall yield. Aryl- as well as heterocyclic substituted ketoimines can be used effectively in the Ag-catalyzed process. Additionally, two examples regarding reactions of alkyl-substituted ketoimines are presented. An electronically modified N-aryl group is introduced that is responsible for high reaction efficiency (>98% conversion, 72-95% yields after purification) as well as diastereo- (up to >98:2 dr) and enantioselectivity (up to 97:3 er or 94% ee). The new N-aryl unit is crucial for conversion of the asymmetric vinylogous Mannich (AVM) products to the unprotected amines in high yields. Spectroscopic and X-ray data are among the physical evidence provided that shed light on the identity of the Ag-based chiral catalysts and some of the mechanistic subtleties of this class of enantioselective C-C bond forming processes.
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Affiliation(s)
- Laura C Wieland
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
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148
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Nojiri A, Kumagai N, Shibasaki M. Linking Structural Dynamics and Functional Diversity in Asymmetric Catalysis. J Am Chem Soc 2009; 131:3779-84. [DOI: 10.1021/ja900084k] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Akihiro Nojiri
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Naoya Kumagai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masakatsu Shibasaki
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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149
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Mandai H, Mandai K, Snapper ML, Hoveyda AH. Three-component Ag-catalyzed enantioselective vinylogous mannich and Aza-Diels-Alder reactions with alkyl-substituted aldehydes. J Am Chem Soc 2009; 130:17961-9. [PMID: 19053434 DOI: 10.1021/ja807243t] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Efficient protocols for three-component catalytic enantioselective vinylogous Mannich (VM) reactions of alkyl-substituted aldimines (including those bearing heteroatom-containing substituents) and readily available siloxyfurans are presented. High efficiency and stereoselectivity is achieved through the use of o-thiomethyl-p-methoxyaniline-derived aldimines. Reactions, performed under an atmosphere of air and in undistilled THF, can be promoted in the presence of as little as 1 mol % of easily accessible amino acid-based chiral ligands and commercially available AgOAc. The desired products are obtained in 44 to 92% yield, and in up to >98:<2 diastereomer and >99:<1 enantiomer ratio (>98% ee). Removal of the N-activating group is performed through a one-vessel oxidation/hydrolysis operation, which proceeds via a stable aza-quinone (characterized by X-ray crystallography). Evidence is presented indicating that reactions with chiral nonracemic aldehydes are subject to catalyst control: both substrate enantiomers react to afford the desired product diastereomers in high stereoselectivity. Aryl- and alkynyl-substituted o-thiomethyl-p-methoxyaniline-derived aldimines undergo Ag-catalyzed enantioselective VM reactions more efficiently and with higher selectivity than the corresponding o-anisidyl substrates. Additionally, Ag-catalyzed aza-Diels-Alder reactions of the alkyl-substituted aldimines bearing the structurally modified N-aryl unit afford enantiomerically enriched (up to 95% ee) products in up to 88% yield.
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Affiliation(s)
- Hiroki Mandai
- Department of Chemistry, Merkert Chemistry Center, Boston College Chestnut Hill, Massachusetts 02467, USA
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150
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Masarwa A, Fürstner A, Marek I. Metal-catalyzed rearrangement of enantiomerically pure alkylidenecyclopropane derivatives as a new access to cyclobutenes possessing quaternary stereocenters. Chem Commun (Camb) 2009:5760-2. [DOI: 10.1039/b910465h] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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