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Chandrasekhar DB, Tsay SC, Pradhan TK, Hwu JR. Syntheses of Chroman-2-ones and α-Amino Acids through a Diastereoselective Domino Reaction. J Org Chem 2017; 82:5524-5537. [DOI: 10.1021/acs.joc.7b00260] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. Balaji Chandrasekhar
- Department of Chemistry and Frontier Research Center on Fundamental & Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Shwu-Chen Tsay
- Department of Chemistry and Frontier Research Center on Fundamental & Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Tapan K. Pradhan
- Department of Chemistry and Frontier Research Center on Fundamental & Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Jih Ru Hwu
- Department of Chemistry and Frontier Research Center on Fundamental & Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
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Zhang XZ, Deng YH, Yan X, Yu KY, Wang FX, Ma XY, Fan CA. Diastereoselective and Enantioselective Synthesis of Unsymmetric β,β-Diaryl-α-Amino Acid Esters via Organocatalytic 1,6-Conjugate Addition of para-Quinone Methides. J Org Chem 2016; 81:5655-62. [PMID: 27224285 DOI: 10.1021/acs.joc.6b00390] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A novel strategy based on phase transfer catalysis for the diastereoselective and enantioselective direct assembly of unsymmetric β,β-diaryl-α-amino acid esters via 1,6-conjugate addition of para-quinone methides and glycine derivatives is described. This protocol also provides an alternative route to the synthetically interesting functionalized chiral tetrahydroisoquinoline and its analogues.
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Affiliation(s)
- Xiang-Zhi Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Yu-Hua Deng
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, China
| | - Xu Yan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Ke-Yin Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Fang-Xin Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Xiao-Yan Ma
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Chun-An Fan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , 222 Tianshui Nanlu, Lanzhou 730000, China.,State Key Laboratory of Natural and Biomimetic Drugs, Peking University , 38 Xueyuan Lu, Beijing 100191, China
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Yang R, Guo YF, Gao ZY, Zhao Q, Zhang QY, Lin J. Asymmetric Synthesis of Non-Natural Amino Acid Derivatives: (2R/3S) and (2S/3R) 2-(Tert-Butoxycarbonylamino)-3-Cyclohexyl-3-Phenyl Propanoic Acids. JOURNAL OF CHEMICAL RESEARCH 2015. [DOI: 10.3184/174751915x14219405044187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Highly conformationally-constrained novel α-amino acid derivatives ((2R/3S) and (2S/3R)-2-(tert-butoxycarbonylamino)-3-cyclohexyl-3-phenylpropanoic acids) have been synthesised with high stereoselectivity (> 90% de) and in 36–37% overall yields. In the synthesis, Evans’ auxiliary (4(R/S)-4-phenyl-oxzaolidin-2-one) was used to control the stereoselectivity via the key reactions of asymmetric Michael addition, azidation and catalytic hydrogenolysis.
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Affiliation(s)
- Rui Yang
- Faculty of Science, Kunming University of Science and Technology, Kunming 650500, P.R. China
- Key Laboratory of Medicinal Chemistry for Natural Resource (Ministry of Education), School of Chemical Science and Technology, Yunnan University, Kunming 650091, P.R. China
| | - Ya-Fei Guo
- Faculty of Science, Kunming University of Science and Technology, Kunming 650500, P.R. China
| | - Zhan-Yong Gao
- Key Laboratory of Medicinal Chemistry for Natural Resource (Ministry of Education), School of Chemical Science and Technology, Yunnan University, Kunming 650091, P.R. China
| | - Qian Zhao
- Faculty of Science, Kunming University of Science and Technology, Kunming 650500, P.R. China
| | - Qian-Yang Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Ministry of Education), School of Chemical Science and Technology, Yunnan University, Kunming 650091, P.R. China
| | - Jun Lin
- Faculty of Science, Kunming University of Science and Technology, Kunming 650500, P.R. China
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Molinaro C, Scott JP, Shevlin M, Wise C, Ménard A, Gibb A, Junker EM, Lieberman D. Catalytic, asymmetric, and stereodivergent synthesis of non-symmetric β,β-diaryl-α-amino acids. J Am Chem Soc 2015; 137:999-1006. [PMID: 25523503 DOI: 10.1021/ja511872a] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We report a concise, enantio- and diastereoselective route to novel nonsymmetrically substituted N-protected β,β-diaryl-α-amino acids and esters, through the asymmetric hydrogenation of tetrasubstituted olefins, some of the most challenging examples in the field. Stereoselective generation of an E- or Z-enol tosylate, when combined with stereoretentive Suzuki-Miyaura cross-coupling and enantioselective hydrogenation catalyzed by (NBD)2RhBF4 and a Josiphos ligand, allows for full control over the two vicinal stereogenic centers. High yields and excellent enantioselectivities (up to 99% ee) were obtained for a variety of N-acetyl, N-methoxycarbonyl, and N-Boc β,β-diaryldehydroamino acids, containing a diverse and previously unreported series of heterocyclic and aryl substituted groups (24 examples) and allowing access to all four stereoisomers of these valuable building blocks.
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Affiliation(s)
- Carmela Molinaro
- Department of Process Chemistry, Merck & Co. Inc. , Rahway, New Jersey 07065, United States
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Smith MR, Jang YJ, Kim JY, Ciufolini MA. Selective reactivity of electron-rich aryl iodides in the Heck arylation of disubstituted alkenes catalyzed by palladium–arylurea complexes. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.09.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wilcke D, Herdtweck E, Bach T. SN1-Type Substitution Reactions ofN-Protected β-Hydroxytyrosine Esters: Stereoselective Synthesis of β-Aryl and β-Alkyltyrosines. Chem Asian J 2012; 7:1372-82. [DOI: 10.1002/asia.201101016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Indexed: 11/09/2022]
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Valdez SC, Leighton JL. Tandem Asymmetric Aza-Darzens/Ring-Opening Reactions: Dual Functionality from the Silane Lewis Acid. J Am Chem Soc 2009; 131:14638-9. [DOI: 10.1021/ja9066354] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- S. Corey Valdez
- Department of Chemistry, Columbia University, New York, New York 10027
| | - James L. Leighton
- Department of Chemistry, Columbia University, New York, New York 10027
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Li JF, Yang R, Nie L, Yang LJ, Huang R, Lin J. Asymmetric synthesis of chiral 4-substituted 5,5-diethyl oxazolidin-2-ones as potential effective chiral auxiliaries. ACTA ACUST UNITED AC 2008; 66:319-23. [PMID: 16316447 DOI: 10.1111/j.1399-3011.2005.00310.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Four new chiral 4-substituted 5,5-diethyl oxazolidin-2-ones (5a-5d) as potential effective chiral auxiliaries were synthesized from readily available amino acids via asymmetric etherification, Boc protection, Grignard reaction and cyclization reactions in four steps with overall yields of 50-60%.
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Affiliation(s)
- J-F Li
- Department of Applied Chemistry, Center for Advanced Studies of Medicinal and Organic Chemistry, Yunnan University, Kunming 650091, China
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Bull SD, Davies SG, Epstein SW, Garner AC, Mujtaba N, Roberts PM, Savory ED, Smith AD, Tamayo JA, Watkin DJ. Enantiodiscrimination of racemic electrophiles by diketopiperazine enolates: asymmetric synthesis of methyl 2-amino-3-aryl-butanoates and 3-methyl-aspartates. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.05.033] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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