1
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Vastakaite G, Budinská A, Bögli CL, Boll LB, Wennemers H. Kinetic Resolution of β-Branched Aldehydes through Peptide-Catalyzed Conjugate Addition Reactions. J Am Chem Soc 2024; 146:19101-19107. [PMID: 38960380 PMCID: PMC11258695 DOI: 10.1021/jacs.4c03617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/27/2024] [Accepted: 05/28/2024] [Indexed: 07/05/2024]
Abstract
The catalytic kinetic resolution of racemic β-branched aldehydes offers a straightforward stereoselective entry to aldehydes and addition products. Yet, control over stereoselectivity is difficult due to the conformational flexibility of β-branched aldehydes. Here, we show that the peptide catalyst H-dPro-αMePro-Glu-NH2 resolves β-branched aldehydes through reaction with nitroolefins and provides γ-nitroaldehydes with three consecutive stereogenic centers in high yields and stereoselectivities. Kinetic, NMR spectroscopic, and computational studies provided insights into the selectivity-determining step and origins of the kinetic resolution.
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Affiliation(s)
| | | | - Claude L. Bögli
- Laboratorium für
Organische Chemie, ETH Zürich, D-CHAB, Vladimir-Prelog-Weg 3, Zürich 8093, Switzerland
| | - Linus B. Boll
- Laboratorium für
Organische Chemie, ETH Zürich, D-CHAB, Vladimir-Prelog-Weg 3, Zürich 8093, Switzerland
| | - Helma Wennemers
- Laboratorium für
Organische Chemie, ETH Zürich, D-CHAB, Vladimir-Prelog-Weg 3, Zürich 8093, Switzerland
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2
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Duan D, Tang M, Wang M, Qiu H, Song R, Yang D, Lv J. Switchable Enantioselectivity in Conjugate Alkyne Addition of β,γ-Unsaturated α-Keto Esters by Asymmetric Binary Acid Catalysis. Org Lett 2024; 26:3612-3616. [PMID: 38656195 DOI: 10.1021/acs.orglett.4c01101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Switchable enantioselectivity was uncovered in the enantioselective catalytic conjugate addition of β,γ-unsaturated α-keto esters with terminal alkynes to the chiral Lewis acid complex of In(BF4)3 and chiral phosphoric acid.
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Affiliation(s)
- Depeng Duan
- Key Laboratory of Optic-electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Mengdie Tang
- Key Laboratory of Optic-electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Man Wang
- Key Laboratory of Optic-electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Huixin Qiu
- Key Laboratory of Optic-electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Ran Song
- Key Laboratory of Optic-electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Daoshan Yang
- Key Laboratory of Optic-electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Jian Lv
- Key Laboratory of Optic-electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
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3
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Wang Y, Wang B, Ren Z, Guan Z. Copper‐Catalyzed Synthesis of β‐Alkynyl Ketones from Propargylic Alcohols and Enamides. ASIAN J ORG CHEM 2023. [DOI: 10.1002/ajoc.202300021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
- Yucheng Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education Department of Chemistry & Materials Science Northwest University 710069 Xi'an P. R. China
| | - Bo Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education Department of Chemistry & Materials Science Northwest University 710069 Xi'an P. R. China
| | - Zhihui Ren
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education Department of Chemistry & Materials Science Northwest University 710069 Xi'an P. R. China
| | - Zheng‐Hui Guan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education Department of Chemistry & Materials Science Northwest University 710069 Xi'an P. R. China
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4
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Kong HH, Zhu C, Deng S, Xu G, Zhao R, Yao C, Xiang HM, Zhao C, Qi X, Xu H. Remote Enantioselective [4 + 1] Annulation with Copper-Vinylvinylidene Intermediates. J Am Chem Soc 2022; 144:21347-21355. [DOI: 10.1021/jacs.2c09572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Han-Han Kong
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
| | - Cuiju Zhu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
| | - Shuang Deng
- Engineering Research Center of Organosilicon Compounds and Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Guang Xu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
| | - Ruinan Zhao
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
| | - Chaochao Yao
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
| | - Hua-Ming Xiang
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
| | - Chunhui Zhao
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
| | - Xiaotian Qi
- Engineering Research Center of Organosilicon Compounds and Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Hao Xu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
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5
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Wang Z, Li B. Iridium‐Catalyzed Regiodivergent and Enantioselective Hydroalkynylation of Unactivated 1,1‐Disubstituted Alkenes. Angew Chem Int Ed Engl 2022; 61:e202201099. [DOI: 10.1002/anie.202201099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Zi‐Xuan Wang
- Center of Basic Molecular Science (CBMS) Department of Chemistry Tsinghua University Beijing 100084 China
| | - Bi‐Jie Li
- Center of Basic Molecular Science (CBMS) Department of Chemistry Tsinghua University Beijing 100084 China
- Beijing National Laboratory for Molecular Sciences Beijing 100190 China
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6
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Wang Z, Li B. Iridium‐Catalyzed Regiodivergent and Enantioselective Hydroalkynylation of Unactivated 1,1‐Disubstituted Alkenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zi‐Xuan Wang
- Center of Basic Molecular Science (CBMS) Department of Chemistry Tsinghua University Beijing 100084 China
| | - Bi‐Jie Li
- Center of Basic Molecular Science (CBMS) Department of Chemistry Tsinghua University Beijing 100084 China
- Beijing National Laboratory for Molecular Sciences Beijing 100190 China
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7
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Gao PC, Wang ZX, Li BJ. Iridium-Catalyzed Regioselective Hydroalkynylation of Internal Alkenes Directed by an Oxime. Org Lett 2021; 23:9500-9504. [PMID: 34860536 DOI: 10.1021/acs.orglett.1c03707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We report here an iridium-catalyzed hydroalkynylation of allylic alcohols protected by an oxime group. Catalytic alkynylation occurs exclusively at the distal position of the alkene. This method generates γ-alkynyl alcohol oximes directly from internal alkenes and terminal alkynes. The oxime group can be readily removed to afford a free alcohol, thus providing an indirect route for the catalytic hydroalkynylation of allylic alcohols.
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Affiliation(s)
- Peng-Chao Gao
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Zi-Xuan Wang
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Bi-Jie Li
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China.,Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
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8
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Choo KL, Mirabi B, Demmans KZ, Lautens M. Enantioselective Synthesis of Spiro-oxiranes: An Asymmetric Addition/Aldol/Spirocyclization Domino Cascade. Angew Chem Int Ed Engl 2021; 60:21189-21194. [PMID: 34324779 DOI: 10.1002/anie.202105562] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Indexed: 01/11/2023]
Abstract
Enantioenriched spiro-oxiranes bearing three contiguous stereocenters were synthesized using a rhodium-catalyzed asymmetric addition/aldol/spirocyclization sequence. Starting from a linear substrate, the cascade enabled the formation of a spirocyclic framework in a single step. sp2 - and sp-hybridized carbon nucleophiles were found to be competent initiators for this cascade, giving arylated or alkynylated products, respectively. Derivatization studies demonstrated the synthetic versatility of both the epoxide and the alkyne moieties of the products. DFT calculations were used to reconcile spectroscopic discrepancies observed between the solution- and solid-state structures of the products.
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Affiliation(s)
- Ken-Loon Choo
- Davenport Chemical Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, Ontario, M5S 3H6, Canada
| | - Bijan Mirabi
- Davenport Chemical Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, Ontario, M5S 3H6, Canada
| | - Karl Z Demmans
- Davenport Chemical Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, Ontario, M5S 3H6, Canada
| | - Mark Lautens
- Davenport Chemical Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, Ontario, M5S 3H6, Canada
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9
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Choo K, Mirabi B, Demmans KZ, Lautens M. Enantioselective Synthesis of Spiro‐oxiranes: An Asymmetric Addition/Aldol/Spirocyclization Domino Cascade. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105562] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ken‐Loon Choo
- Davenport Chemical Laboratories Department of Chemistry University of Toronto 80 St. George St. Toronto Ontario M5S 3H6 Canada
| | - Bijan Mirabi
- Davenport Chemical Laboratories Department of Chemistry University of Toronto 80 St. George St. Toronto Ontario M5S 3H6 Canada
| | - Karl Z. Demmans
- Davenport Chemical Laboratories Department of Chemistry University of Toronto 80 St. George St. Toronto Ontario M5S 3H6 Canada
| | - Mark Lautens
- Davenport Chemical Laboratories Department of Chemistry University of Toronto 80 St. George St. Toronto Ontario M5S 3H6 Canada
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10
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Wang CY, Qin ZY, Huang YL, Hou YM, Jin RX, Li C, Wang XS. Enantioselective Copper-Catalyzed Remote C(sp3)–H Alkynylation of Linear Primary Sulfonamides. Org Lett 2020; 22:4006-4009. [DOI: 10.1021/acs.orglett.0c01325] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cheng-Yu Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Zi-Yang Qin
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Yu-Ling Huang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Yi-Ming Hou
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ruo-Xing Jin
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Chao Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
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11
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Bai Z, Bai Z, Song F, Wang H, Chen G, He G. Palladium-Catalyzed Amide-Directed Hydrocarbofunctionalization of 3-Alkenamides with Alkynes. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04285] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Zibo Bai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Ziqian Bai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Fangfang Song
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Hao Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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12
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Policarpo RL, Decultot L, May E, Kuzmič P, Carlson S, Huang D, Chu V, Wright BA, Dhakshinamoorthy S, Kannt A, Rani S, Dittakavi S, Panarese JD, Gaudet R, Shair MD. High-Affinity Alkynyl Bisubstrate Inhibitors of Nicotinamide N-Methyltransferase (NNMT). J Med Chem 2019; 62:9837-9873. [PMID: 31589440 DOI: 10.1021/acs.jmedchem.9b01238] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nicotinamide N-methyltransferase (NNMT) is a metabolic enzyme that methylates nicotinamide (NAM) using cofactor S-adenosylmethionine (SAM). NNMT overexpression has been linked to diabetes, obesity, and various cancers. In this work, structure-based rational design led to the development of potent and selective alkynyl bisubstrate inhibitors of NNMT. The reported nicotinamide-SAM conjugate (named NS1) features an alkyne as a key design element that closely mimics the linear, 180° transition state geometry found in the NNMT-catalyzed SAM → NAM methyl transfer reaction. NS1 was synthesized in 14 steps and found to be a high-affinity, subnanomolar NNMT inhibitor. An X-ray cocrystal structure and SAR study revealed the ability of an alkynyl linker to span the methyl transfer tunnel of NNMT with ideal shape complementarity. The compounds reported in this work represent the most potent and selective NNMT inhibitors reported to date. The rational design principle described herein could potentially be extended to other methyltransferase enzymes.
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Affiliation(s)
| | | | | | - Petr Kuzmič
- BioKin Ltd. , Watertown , Massachusetts 02472 , United States
| | | | | | | | | | | | - Aimo Kannt
- Sanofi Research and Development , Industriepark Hoechst, H823 , D-65926 Frankfurt am Main , Germany
| | - Shilpa Rani
- Jubilant Biosys Ltd. , Yeshwantpur, Bangalore , 560 022 Karnataka , India
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13
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Teng Q, Thirupathi N, Tung CH, Xu Z. Hydroalkynylative cyclization of 1,6-enynes with terminal alkynes. Chem Sci 2019; 10:6863-6867. [PMID: 31391909 PMCID: PMC6657412 DOI: 10.1039/c9sc02341k] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 06/07/2019] [Indexed: 11/25/2022] Open
Abstract
A rhodium-catalyzed highly regio- and enantioselective hydroalkynylation generating cis-hydrobenzofuranone-tethered enynes has been developed. The reaction proceeds with a dynamic kinetic head-to-head insertion and symmetry breaking Michael addition cascade.
A rhodium-catalyzed highly regio- and enantioselective hydroalkynylation, generating cis-hydrobenzofuranone-tethered enynes has been developed. The reaction proceeds with a selective head-to-head insertion and symmetry breaking Michael addition cascade. One product was produced from tens of possible isomers through precise control of chemo-, regio-, and stereoselectivities using a single rhodium catalyst. Notable features of this method include 100% atom-economy, mild reaction conditions and a very broad substrate scope.
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Affiliation(s)
- Qi Teng
- Key Lab for Colloid and Interface Chemistry of Education Ministry , School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , People's Republic of China .
| | - Nuligonda Thirupathi
- Key Lab for Colloid and Interface Chemistry of Education Ministry , School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , People's Republic of China .
| | - Chen-Ho Tung
- Key Lab for Colloid and Interface Chemistry of Education Ministry , School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , People's Republic of China .
| | - Zhenghu Xu
- Key Lab for Colloid and Interface Chemistry of Education Ministry , School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , People's Republic of China . .,State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , Shanghai 200032 , PR China
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14
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Wang ZX, Li BJ. Construction of Acyclic Quaternary Carbon Stereocenters by Catalytic Asymmetric Hydroalkynylation of Unactivated Alkenes. J Am Chem Soc 2019; 141:9312-9320. [PMID: 31117476 DOI: 10.1021/jacs.9b03027] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Quaternary carbon stereocenters are common structural motifs in organic synthesis. The construction of these stereocenters in a catalytic and enantioselective manner remains a prominent synthetic challenge. In particular, methods for the synthesis of alkyne-substituted quaternary carbon stereocenters are very rare. Previous catalytic systems for hydroalkynylation of alkenes create tertiary stereocenters. We describe here an iridium catalyzed asymmetric hydroalkynylation of nonactivated trisubstituted alkene. The hydroalkynylation of β,γ-unsaturated amides occurs with high regio- and enantioselectivities to afford alkyne-substituted acyclic quaternary carbon stereocenters. Computational and experimental data suggest that the enantioselectivity is not only determined by the facial selectivity of the alkene but also by an alkene isomerization process. This strategy provides an efficient method to access alkyne-substituted acyclic quaternary carbon stereocenters with minimally functionalized starting materials.
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Affiliation(s)
- Zi-Xuan Wang
- Center of Basic Molecular Science (CBMS), Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China
| | - Bi-Jie Li
- Center of Basic Molecular Science (CBMS), Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China
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15
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Lei X, Feng J, Liu J, Tang Y. Advances in the Total Synthesis of Xanthanolide‐Type Sesquiterpenoids. Chem Asian J 2019; 14:1888-1899. [DOI: 10.1002/asia.201900040] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Xiaoqiang Lei
- School of Pharmaceutical SciencesMOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical BiologyTsinghua University Beijing 100084 China
| | - Juan Feng
- School of Pharmaceutical SciencesMOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical BiologyTsinghua University Beijing 100084 China
- School of Pharmaceutical SciencesBeijing Area Major Laboratory of Peptide & Small Molecular DrugsEngineering Research Center of Endogenous Prophylactic of Ministry of Education of ChinaBeijing Laboratory of Biomedical MaterialsCapital Medical University Beijing 100069 China
| | - Jingchun Liu
- School of Pharmaceutical SciencesMOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical BiologyTsinghua University Beijing 100084 China
| | - Yefeng Tang
- School of Pharmaceutical SciencesMOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical BiologyTsinghua University Beijing 100084 China
- Collaborative Innovation Center for BiotherapyState Key Laboratory of Biotherapy and Cancer CenterWest China Medical SchoolSichuan University Chengdu 610041 China
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16
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Han YQ, Ding Y, Zhou T, Yan SY, Song H, Shi BF. Pd(II)-Catalyzed Enantioselective Alkynylation of Unbiased Methylene C(sp3)–H Bonds Using 3,3′-Fluorinated-BINOL as a Chiral Ligand. J Am Chem Soc 2019; 141:4558-4563. [DOI: 10.1021/jacs.9b01124] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Ye-Qiang Han
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Yi Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Tao Zhou
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Sheng-Yi Yan
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Hong Song
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Bing-Feng Shi
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
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17
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Duan CL, Tan YX, Zhang JL, Yang S, Dong HQ, Tian P, Lin GQ. Highly Enantioselective Rhodium-Catalyzed Cross-Addition of Silylacetylenes to Cyclohexadienone-Tethered Internal Alkynes. Org Lett 2019; 21:1690-1693. [DOI: 10.1021/acs.orglett.9b00249] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Chang-Lin Duan
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine (IRI), Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China
- Department of Chemistry, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Yun-Xuan Tan
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jun-Li Zhang
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine (IRI), Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China
| | - Shiping Yang
- Department of Chemistry, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Han-Qing Dong
- Arvinas, Inc., 5 Science Park 395 Winchester Avenue, New Haven, Connecticut 06511, United States
| | - Ping Tian
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine (IRI), Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Guo-Qiang Lin
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine (IRI), Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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18
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Fu L, Zhou S, Wan X, Chen P, Liu G. Enantioselective Trifluoromethylalkynylation of Alkenes via Copper-Catalyzed Radical Relay. J Am Chem Soc 2018; 140:10965-10969. [DOI: 10.1021/jacs.8b07436] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Liang Fu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Song Zhou
- School of Biotechnology and Health Science, Wuyi University, Jiangmen 529020, China
| | - Xiaolong Wan
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Pinhong Chen
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Guosheng Liu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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19
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Zheng K, Liu X, Feng X. Recent Advances in Metal-Catalyzed Asymmetric 1,4-Conjugate Addition (ACA) of Nonorganometallic Nucleophiles. Chem Rev 2018; 118:7586-7656. [PMID: 30047721 DOI: 10.1021/acs.chemrev.7b00692] [Citation(s) in RCA: 191] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The metal-catalyzed asymmetric conjugate addition (ACA) reaction has emerged as a general and powerful approach for the construction of optically active compounds and is among the most significant and useful reactions in synthetic organic chemistry. In recent years, great progress has been made in this area with the use of various chiral metal complexes based on different chiral ligands. This review provides comprehensive and critical information on the enantioselective 1,4-conjugate addition of nonorganometallic (soft) nucleophiles and their importance in synthetic applications. The literature is covered from the last 10 years, and a number of examples from before 2007 are included as background information. The review is divided into multiple parts according to the type of nucleophile involved in the reaction (such as C-, B-, O-, N-, S-, P-, and Si-centered nucleophiles) and metal catalyst systems used.
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Affiliation(s)
- Ke Zheng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P. R. China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P. R. China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P. R. China
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20
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Choo KL, Lautens M. Rhodium-Catalyzed Asymmetric Conjugate Alkynylation/Aldol Cyclization Cascade for the Formation of α-Propargyl-β-hydroxyketones. Org Lett 2018; 20:1380-1383. [DOI: 10.1021/acs.orglett.8b00153] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ken-Loon Choo
- Davenport Research Laboratories,
Department
of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Mark Lautens
- Davenport Research Laboratories,
Department
of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
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21
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Zhou Y, Bandar JS, Liu RY, Buchwald SL. CuH-Catalyzed Asymmetric Reduction of α,β-Unsaturated Carboxylic Acids to β-Chiral Aldehydes. J Am Chem Soc 2018; 140:606-609. [PMID: 29283578 PMCID: PMC5800953 DOI: 10.1021/jacs.7b12260] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The copper hydride (CuH)-catalyzed enantioselective reduction of α,β-unsaturated carboxylic acids to saturated aldehydes is reported. This protocol provides a new method to access a variety of β-chiral aldehydes in good yields, with high levels of enantioselectivity and broad functional group tolerance. A reaction pathway involving a ketene intermediate is proposed based on preliminary mechanistic studies and density functional theory calculations.
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Affiliation(s)
- Yujing Zhou
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Jeffrey S. Bandar
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Richard Y. Liu
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Stephen L. Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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22
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Chen Y, Wang ZX, Li Q, Xu LJ, Li BJ. Iridium-catalysed conjugated alkynylation of α,β-unsaturated amide through alkene isomerization. Org Chem Front 2018. [DOI: 10.1039/c8qo00136g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
We have developed an iridium-catalysed conjugated alkynylation of α,β-unsaturated amide.
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Affiliation(s)
- Yun Chen
- Department of Chemistry
- Renmin University of China
- Beijing
- China
- Center of Basic Molecular Science (CBMS)
| | - Zi-Xuan Wang
- Center of Basic Molecular Science (CBMS)
- Department of Chemistry
- Tsinghua University
- Beijing
- China
| | - Qian Li
- The Affiliated High School of Peking University
- Beijing
- China
| | - Li-Jin Xu
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Bi-Jie Li
- Center of Basic Molecular Science (CBMS)
- Department of Chemistry
- Tsinghua University
- Beijing
- China
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23
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Dou X, Liu N, Yao J, Lu T. Rhodium-Catalyzed Homocoupling of γ-Alkylated tert-Propargylic Alcohols. Org Lett 2017; 20:272-275. [DOI: 10.1021/acs.orglett.7b03663] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaowei Dou
- Department
of Organic Chemistry and ‡State Key Laboratory of Natural
Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Na Liu
- Department
of Organic Chemistry and ‡State Key Laboratory of Natural
Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Jian Yao
- Department
of Organic Chemistry and ‡State Key Laboratory of Natural
Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Tao Lu
- Department
of Organic Chemistry and ‡State Key Laboratory of Natural
Medicines, China Pharmaceutical University, Nanjing 210009, China
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24
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Bai XY, Zhang WW, Li Q, Li BJ. Highly Enantioselective Synthesis of Propargyl Amides through Rh-Catalyzed Asymmetric Hydroalkynylation of Enamides: Scope, Mechanism, and Origin of Selectivity. J Am Chem Soc 2017; 140:506-514. [PMID: 29232516 DOI: 10.1021/jacs.7b12054] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Chiral propargyl amides are particularly useful structural units in organic synthesis. The enantioselective synthesis of propargyl amide is highly desirable. Conventional approach involves the use of a stoichiometric amount of metal reagent or chiral auxiliary. In comparison, direct alkynylation with terminal alkyne is attractive because it avoids the use of stoichiometric organometallic reagent. The asymmetric coupling of aldehyde, amine, and alkyne (A3-coupling) provides an efficient method for the synthesis of N-alkyl and N-aryl-substituted propargyl amines, but this strategy is not amenable for the direct enantioselective synthesis of propargyl amide. We have developed a new strategy and report here a Rh-catalyzed asymmetric hydroalkynylation of enamides. Alkynylations occur regioselectively at the α position of an enamide to produce chiral propargyl amides. High yield and enantioselectivity were observed. Previous alkynylation methods to prepare chiral propargyl amine involve the nucleophilic addition to an electron-deficient imine. In contrast, our current approach proceeds through regioselective hydroalkynylation of an electron-rich alkene. Kinetic studies indicated that migratory insertion of the enamide to the rhodium hydride is turnover limiting. Computational studies revealed the origin of regio- and enantioselectivities. This novel strategy provides an efficient method to access chiral propargyl amides directly from terminal alkynes.
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Affiliation(s)
- Xiao-Yan Bai
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University , Beijing 100084, China
| | - Wen-Wen Zhang
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University , Beijing 100084, China
| | - Qian Li
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University , Beijing 100084, China
| | - Bi-Jie Li
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University , Beijing 100084, China
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25
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Feng J, Lei X, Bao R, Li Y, Xiao C, Hu L, Tang Y. Enantioselective and Collective Total Syntheses of Xanthanolides. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710846] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Juan Feng
- The Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
| | - Xiaoqiang Lei
- The Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
| | - Ruiyang Bao
- The Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
| | - Yuanhe Li
- The Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
| | - Chengqian Xiao
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine; Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization; State Key Laboratory Cultivation Base for TCM Quality and Efficacy; School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing PR China
| | - Lihong Hu
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine; Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization; State Key Laboratory Cultivation Base for TCM Quality and Efficacy; School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing PR China
| | - Yefeng Tang
- The Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
- Collaborative Innovation Center for Biotherapy; West China Hospital; Sichuan University; Chengdu 610041 China
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26
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Feng J, Lei X, Bao R, Li Y, Xiao C, Hu L, Tang Y. Enantioselective and Collective Total Syntheses of Xanthanolides. Angew Chem Int Ed Engl 2017; 56:16323-16327. [PMID: 29112300 DOI: 10.1002/anie.201710846] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Indexed: 02/05/2023]
Affiliation(s)
- Juan Feng
- The Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
| | - Xiaoqiang Lei
- The Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
| | - Ruiyang Bao
- The Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
| | - Yuanhe Li
- The Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
| | - Chengqian Xiao
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine; Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization; State Key Laboratory Cultivation Base for TCM Quality and Efficacy; School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing PR China
| | - Lihong Hu
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine; Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization; State Key Laboratory Cultivation Base for TCM Quality and Efficacy; School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing PR China
| | - Yefeng Tang
- The Department of Pharmacology and Pharmaceutical Sciences; School of Medicine; Tsinghua University; Beijing 100084 China
- Collaborative Innovation Center for Biotherapy; West China Hospital; Sichuan University; Chengdu 610041 China
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27
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Chen ZM, Nervig CS, DeLuca RJ, Sigman MS. Palladium-Catalyzed Enantioselective Redox-Relay Heck Alkynylation of Alkenols To Access Propargylic Stereocenters. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703089] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Zhi-Min Chen
- Department of Chemistry; University of Utah; 315 South 1400 East Salt Lake City UT 84112 USA
| | - Christine S. Nervig
- Department of Chemistry; University of Utah; 315 South 1400 East Salt Lake City UT 84112 USA
| | - Ryan J. DeLuca
- Department of Chemistry; University of Utah; 315 South 1400 East Salt Lake City UT 84112 USA
| | - Matthew S. Sigman
- Department of Chemistry; University of Utah; 315 South 1400 East Salt Lake City UT 84112 USA
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28
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Chen ZM, Nervig CS, DeLuca RJ, Sigman MS. Palladium-Catalyzed Enantioselective Redox-Relay Heck Alkynylation of Alkenols To Access Propargylic Stereocenters. Angew Chem Int Ed Engl 2017; 56:6651-6654. [PMID: 28467031 DOI: 10.1002/anie.201703089] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Indexed: 11/09/2022]
Abstract
An enantioselective redox-relay Heck alkynylation of di- and trisubstituted alkenols to construct propargylic stereocenters is disclosed using a new pyridine oxazoline ligand. This strategy allows direct access to chiral β-alkynyl carbonyl compounds employing allylic alcohol substrates in contrast to more traditional conjugate addition methods.
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Affiliation(s)
- Zhi-Min Chen
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT, 84112, USA
| | - Christine S Nervig
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT, 84112, USA
| | - Ryan J DeLuca
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT, 84112, USA
| | - Matthew S Sigman
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT, 84112, USA
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29
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Zhi Y, Huang J, Liu N, Lu T, Dou X. Rhodium-Catalyzed Asymmetric Conjugate Alkynylation of β,γ-Unsaturated α-Ketoesters. Org Lett 2017; 19:2378-2381. [DOI: 10.1021/acs.orglett.7b00909] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Yanle Zhi
- Department
of Organic Chemistry and ‡State Key Laboratory of Natural
Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Jianhang Huang
- Department
of Organic Chemistry and ‡State Key Laboratory of Natural
Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Na Liu
- Department
of Organic Chemistry and ‡State Key Laboratory of Natural
Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Tao Lu
- Department
of Organic Chemistry and ‡State Key Laboratory of Natural
Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Xiaowei Dou
- Department
of Organic Chemistry and ‡State Key Laboratory of Natural
Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
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30
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Singh VK, Upadhyay A, Singh RKP. Zinc-mediated synthesis of 3-alkynyl-3-hydroxyindolin-2-ones by addition of iodoalkynes to isatins. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2016.11.124] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Wang ZX, Bai XY, Yao HC, Li BJ. Synthesis of Amides with Remote Stereocenters by Catalytic Asymmetric γ-Alkynylation of α,β-Unsaturated Amides. J Am Chem Soc 2016; 138:14872-14875. [DOI: 10.1021/jacs.6b10415] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Zi-Xuan Wang
- Center of Basic Molecular
Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xiao-Yan Bai
- Center of Basic Molecular
Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Han-Chao Yao
- Center of Basic Molecular
Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Bi-Jie Li
- Center of Basic Molecular
Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
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32
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Trost BM, Masters JT, Taft BR, Lumb JP. Asymmetric synthesis of chiral β-alkynyl carbonyl and sulfonyl derivatives via sequential palladium and copper catalysis. Chem Sci 2016; 7:6217-6231. [PMID: 27746892 PMCID: PMC5044515 DOI: 10.1039/c6sc01724j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 06/09/2016] [Indexed: 11/21/2022] Open
Abstract
We present a full account detailing the development of a sequential catalysis strategy for the synthesis of chiral β-alkynyl carbonyl and sulfonyl derivatives. A palladium-catalyzed cross coupling of terminal alkyne donors with acetylenic ester, ketone, and sulfone acceptors generates stereodefined enynes in high yield. These compounds are engaged in an unprecedented, regio- and enantioselective copper-catalyzed conjugate reduction. The process exhibits a high functional group tolerance, and this enables the synthesis of a broad range of chiral products from simple, readily available alkyne precursors. The utility of the method is demonstrated through the elaboration of the chiral β-alkynyl products into a variety of different molecular scaffolds. Its value in complex molecule synthesis is further validated through a concise, enantioselective synthesis of AMG 837, a potent GPR40 receptor agonist.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry , Stanford University , Stanford , CA 94305-5080 , USA .
| | - James T Masters
- Department of Chemistry , Stanford University , Stanford , CA 94305-5080 , USA .
| | - Benjamin R Taft
- Department of Chemistry , Stanford University , Stanford , CA 94305-5080 , USA .
| | - Jean-Philip Lumb
- Department of Chemistry , Stanford University , Stanford , CA 94305-5080 , USA .
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33
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Ferrara SJ, Burton JW. A Short Synthesis of Aphanamol I in Both Racemic and Enantiopure Forms. Chemistry 2016; 22:11597-600. [PMID: 27389970 PMCID: PMC5096262 DOI: 10.1002/chem.201602669] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Indexed: 11/17/2022]
Abstract
A short synthesis of the biologically active sesquiterpene natural product (+)-aphanamol I in both racemic and enantiopure forms is reported. Key steps include: a catalytic enantioselective conjugate addition, an oxidative radical cyclization, and a ring-expanding Claisen rearrangement.
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Affiliation(s)
- Steven J Ferrara
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK
| | - Jonathan W Burton
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
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34
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Sanz-Marco A, Blay G, Vila C, Pedro JR. Catalytic Enantioselective Conjugate Alkynylation of β-Aryl-β-trifluoromethyl Enones Constructing Propargylic All-Carbon Quaternary Stereogenic Centers. Org Lett 2016; 18:3538-41. [DOI: 10.1021/acs.orglett.6b01494] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amparo Sanz-Marco
- Departament de Química
Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner 50, E-46100 Burjassot, València, Spain
| | - Gonzalo Blay
- Departament de Química
Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner 50, E-46100 Burjassot, València, Spain
| | - Carlos Vila
- Departament de Química
Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner 50, E-46100 Burjassot, València, Spain
| | - José R. Pedro
- Departament de Química
Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner 50, E-46100 Burjassot, València, Spain
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35
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Sanz-Marco A, Blay G, Muñoz MC, Pedro JR. Catalytic Enantioselective Conjugate Alkynylation of α,β-Unsaturated 1,1,1-Trifluoromethyl Ketones with Terminal Alkynes. Chemistry 2016; 22:10057-64. [DOI: 10.1002/chem.201601303] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Amparo Sanz-Marco
- Department de Química Orgànica-Facultat de Química; Universitat de València; C/Dr. Moliner 50 46100 Burjasso Spain
| | - Gonzalo Blay
- Department de Química Orgànica-Facultat de Química; Universitat de València; C/Dr. Moliner 50 46100 Burjasso Spain
| | - M. Carmen Muñoz
- Departament de Física Aplicada; Universitat Politècnica de València; Camí de Vera s/n 46022 València Spain
| | - José R. Pedro
- Department de Química Orgànica-Facultat de Química; Universitat de València; C/Dr. Moliner 50 46100 Burjasso Spain
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36
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Xu N, Gu DW, Zi J, Wu XY, Guo XX. Enantioselective Synthesis of 3-Alkynyl-3-hydroxyindolin-2-ones by Copper-Catalyzed Asymmetric Addition of Terminal Alkynes to Isatins. Org Lett 2016; 18:2439-42. [DOI: 10.1021/acs.orglett.6b00971] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ning Xu
- Key
Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Da-Wei Gu
- Shanghai
Center for Systems Biomedicine, Ministry of Education Key Laboratory
of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Jing Zi
- Shanghai
Center for Systems Biomedicine, Ministry of Education Key Laboratory
of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Xin-Yan Wu
- Key
Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Xun-Xiang Guo
- Shanghai
Center for Systems Biomedicine, Ministry of Education Key Laboratory
of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
- State
Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, P. R. China
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37
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Bai XY, Wang ZX, Li BJ. Iridium-Catalyzed Enantioselective Hydroalkynylation of Enamides for the Synthesis of Homopropargyl Amides. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601792] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Xiao-Yan Bai
- Center of Basic Molecular Science (CBMS), Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Zi-Xuan Wang
- Center of Basic Molecular Science (CBMS), Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Bi-Jie Li
- Center of Basic Molecular Science (CBMS), Department of Chemistry; Tsinghua University; Beijing 100084 China
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38
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Bai XY, Wang ZX, Li BJ. Iridium-Catalyzed Enantioselective Hydroalkynylation of Enamides for the Synthesis of Homopropargyl Amides. Angew Chem Int Ed Engl 2016; 55:9007-11. [PMID: 27111577 DOI: 10.1002/anie.201601792] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Indexed: 02/04/2023]
Abstract
Reported is an iridium-catalyzed asymmetric hydroalkynylation of enamides with terminal alkynes. The reaction occurs regioselectively at the β-position of an enamide to produce homopropargyl amides. Good to high enantioselectivity was observed with an iridium complex ligated by a chiral bis(phosphine) ligand. This method provides a straightforward route to synthesize chiral homopropargyl amides with a stereocenter β to the amide.
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Affiliation(s)
- Xiao-Yan Bai
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Zi-Xuan Wang
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Bi-Jie Li
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China.
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39
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Brütsch TM, Bucher P, Altmann KH. Total Synthesis and Biological Assessment of Mandelalide A. Chemistry 2015; 22:1292-300. [PMID: 26639765 DOI: 10.1002/chem.201504230] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Indexed: 11/11/2022]
Abstract
A new convergent total synthesis of the marine macrolide mandelalide A (1) has been developed that is based on macrocyclic ring closure by a Shiina-type macrolactonization and the construction of the requisite precursor seco acid by a highly efficient Sonogashira cross-coupling reaction between two fragments of comparable complexity. Key steps in the elaboration of the acid building block were the enantioselective, catalytic addition of a protected acetylene to crotonaldehyde and the construction of the tetrahydropyran unit that is embedded in the macrocycle by means of an acid-catalyzed Prins reaction. The synthesis of the alcohol fragment features the formation of the trisubstituted tetrahydrofuran ring through an acetal cleavage/epoxide opening cascade reaction and a rarely used radical alkynylation of a primary alkyl iodide. Intriguingly, the dihydroxylation of a terminal double bond as part of the synthesis of this building block gave the same major product for both the α- and β-AD-mix reagents, albeit with moderate or low selectivity. Synthetic mandelalide A (1) was a potent proliferation inhibitor of A549, HT460, and H1299 human lung cancer cells in vitro, but not of SK-N-SH neuroblastoma cells. However, in no case did we observe complete cell kill even at the highest compound concentration tested (5 μm).
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Affiliation(s)
- Tobias Michael Brütsch
- Swiss Federal Institute of Technology (ETH) Zürich, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, HCI H405, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| | - Pascal Bucher
- Swiss Federal Institute of Technology (ETH) Zürich, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, HCI H405, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland
| | - Karl-Heinz Altmann
- Swiss Federal Institute of Technology (ETH) Zürich, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, HCI H405, Vladimir-Prelog-Weg 4, 8093, Zürich, Switzerland.
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Dou X, Huang Y, Hayashi T. Asymmetric Conjugate Alkynylation of Cyclic α,β-Unsaturated Carbonyl Compounds with a Chiral Diene Rhodium Catalyst. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201509778] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xiaowei Dou
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Yinhua Huang
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Tamio Hayashi
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
- Institute of Materials Research and Engineering, A*STAR; 2 Fusionopolis Way Singapore 138634 Singapore
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41
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Dou X, Huang Y, Hayashi T. Asymmetric Conjugate Alkynylation of Cyclic α,β-Unsaturated Carbonyl Compounds with a Chiral Diene Rhodium Catalyst. Angew Chem Int Ed Engl 2015; 55:1133-7. [DOI: 10.1002/anie.201509778] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Xiaowei Dou
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Yinhua Huang
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Tamio Hayashi
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
- Institute of Materials Research and Engineering, A*STAR; 2 Fusionopolis Way Singapore 138634 Singapore
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42
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Wang H, Hearne Z, Knauber T, Dalko M, Hitce J, Marat X, Moreau M, Li CJ. Palladium-catalyzed 1,4-addition of terminal alkynes to acrolein. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.05.087] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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43
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Sawano T, Hashizume M, Nishimoto S, Ou K, Nishimura T. Formation of Carbocycles via a 1,4-Rh Shift Triggered by a Rhodium-Catalyzed Addition of Terminal Alkynes to 3,3-Diarylcyclopropenes. Org Lett 2015; 17:2630-3. [DOI: 10.1021/acs.orglett.5b00984] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takahiro Sawano
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Minoru Hashizume
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Shouta Nishimoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Keiyu Ou
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Takahiro Nishimura
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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44
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Capreti NMR, Jurberg ID. Michael Addition of Soft Carbon Nucleophiles to Alkylidene Isoxazol-5-ones: A Divergent Entry to β-Branched Carbonyl Compounds. Org Lett 2015; 17:2490-3. [DOI: 10.1021/acs.orglett.5b01004] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Naylil M. R. Capreti
- Institute
of Chemistry, State University of Campinas, 13083-970, C.P. 6154, Campinas, SP, Brazil
| | - Igor D. Jurberg
- Institute
of Chemistry, State University of Campinas, 13083-970, C.P. 6154, Campinas, SP, Brazil
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45
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Byrd KM. Diastereoselective and enantioselective conjugate addition reactions utilizing α,β-unsaturated amides and lactams. Beilstein J Org Chem 2015; 11:530-62. [PMID: 25977728 PMCID: PMC4419509 DOI: 10.3762/bjoc.11.60] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 04/01/2015] [Indexed: 12/19/2022] Open
Abstract
The conjugate addition reaction has been a useful tool in the formation of carbon-carbon bonds. The utility of this reaction has been demonstrated in the synthesis of many natural products, materials, and pharmacological agents. In the last three decades, there has been a significant increase in the development of asymmetric variants of this reaction. Unfortunately, conjugate addition reactions using α,β-unsaturated amides and lactams remain underdeveloped due to their inherently low reactivity. This review highlights the work that has been done on both diastereoselective and enantioselective conjugate addition reactions utilizing α,β-unsaturated amides and lactams.
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Affiliation(s)
- Katherine M Byrd
- Department of Medicinal Chemistry, University of Kansas, 1251 Wescoe Hall Drive Lawrence, Kansas 66045-7582, USA
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46
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Rajesh N, Prajapati D. A copper-catalyzed one-pot, three-component tandem conjugative alkynylation/6-endo cyclization sequence: access to pyrano[2,3-d]pyrimidines. Org Biomol Chem 2015; 13:4668-72. [DOI: 10.1039/c5ob00380f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A copper-catalyzed one-pot, atom/step-economical, three component method for the construction of pyrano[2,3-d]pyrimidines has been developed via a tandem conjugative alkynylation/6-endo cyclization sequence.
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Affiliation(s)
- Nimmakuri Rajesh
- Medicinal Chemistry Division
- CSIR-North-East Institute of Science and Technology
- Jorhat
- India
| | - Dipak Prajapati
- Medicinal Chemistry Division
- CSIR-North-East Institute of Science and Technology
- Jorhat
- India
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47
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Sanz-Marco A, Blay G, Muñoz MC, Pedro JR. Highly enantioselective copper(i)-catalyzed conjugate addition of 1,3-diynes to α,β-unsaturated trifluoromethyl ketones. Chem Commun (Camb) 2015; 51:8958-61. [DOI: 10.1039/c5cc01676b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The conjugate diynylation of α,β-unsaturated trifluoromethyl ketones with terminal diynes is carried out. Pre-metalation of the terminal 1,3-diyne is not required. Diynes bearing a propargylic stereogenic center are obtained with good yields and ee's.
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Affiliation(s)
- Amparo Sanz-Marco
- Departament de Química Orgànica
- Facultat de Química
- Universitat de València
- 46100-Burjassot
- Spain
| | - Gonzalo Blay
- Departament de Química Orgànica
- Facultat de Química
- Universitat de València
- 46100-Burjassot
- Spain
| | - M. Carmen Muñoz
- Departament de Física Aplicada
- Universitat Politècnica de València
- E-46022-València
- Spain
| | - José R. Pedro
- Departament de Química Orgànica
- Facultat de Química
- Universitat de València
- 46100-Burjassot
- Spain
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48
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Sanz-Marco A, García-Ortiz A, Blay G, Pedro JR. Catalytic asymmetric conjugate addition of terminal alkynes to β-trifluoromethyl α,β-enones. Chem Commun (Camb) 2014; 50:2275-8. [DOI: 10.1039/c3cc48508k] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The first enantioselective conjugate alkynylation of β-trifluoromethyl α,β-enones using terminal alkynes and a taniaphos–Cu(i) complex as catalyst is described.
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Affiliation(s)
- Amparo Sanz-Marco
- Departament de Química Orgànica
- Facultat de Química
- Universitat de València
- 46100-Burjassot, Spain
| | - Andrea García-Ortiz
- Departament de Química Orgànica
- Facultat de Química
- Universitat de València
- 46100-Burjassot, Spain
| | - Gonzalo Blay
- Departament de Química Orgànica
- Facultat de Química
- Universitat de València
- 46100-Burjassot, Spain
| | - José R. Pedro
- Departament de Química Orgànica
- Facultat de Química
- Universitat de València
- 46100-Burjassot, Spain
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49
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Sanz-Marco A, García-Ortiz A, Blay G, Fernández I, Pedro JR. Highly Enantioselective Copper(I)-Catalyzed Conjugate Addition of Terminal Alkynes to 1,1-Difluoro-1-(phenylsulfonyl)-3-en-2-ones: New Ester/Amide Surrogates in Asymmetric Catalysis. Chemistry 2013; 20:668-72. [DOI: 10.1002/chem.201303920] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Indexed: 11/11/2022]
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50
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Fan B, Xu J, Yang Q, Li S, Chen H, Liu S, Yu L, Zhou Y, Wang L. Rh-Catalyzed Highly Enantioselective Hydroalkynylation Reaction of Norbornadiene Derivatives. Org Lett 2013; 15:5956-9. [DOI: 10.1021/ol402804t] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Baomin Fan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan University of Nationalities, Kunming, Yunnan, 650500, China
| | - Jianbin Xu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan University of Nationalities, Kunming, Yunnan, 650500, China
| | - Qingjing Yang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan University of Nationalities, Kunming, Yunnan, 650500, China
| | - Sifeng Li
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan University of Nationalities, Kunming, Yunnan, 650500, China
| | - Hualei Chen
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan University of Nationalities, Kunming, Yunnan, 650500, China
| | - Shanshan Liu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan University of Nationalities, Kunming, Yunnan, 650500, China
| | - Lu Yu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan University of Nationalities, Kunming, Yunnan, 650500, China
| | - Yongyun Zhou
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan University of Nationalities, Kunming, Yunnan, 650500, China
| | - Lin Wang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan University of Nationalities, Kunming, Yunnan, 650500, China
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