1
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You X, Yao Y, Liu P, Chen L, Xie Y, Li G, Hong L. Synthesis of Isoquinuclidines via Dearomative Diels-Alder Reaction of Cyclic Amidines with Indoles. J Org Chem 2024; 89:3635-3643. [PMID: 38359465 DOI: 10.1021/acs.joc.3c02736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
The development and utilization of new dienes and dienophiles for the controlled synthesis of isoquinuclidines is highly appealing. Herein, we describe a novel strategy for diastereoselective synthesis of indoline-fused isoquinuclidines via copper-catalyzed dearomative Diels-Alder reaction of cyclic amidines with indoles. This protocol avoids the use of unstable DHPs and activated alkenes, offering a more efficient and selective approach to synthesize isoquinuclidines.
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Affiliation(s)
- Xiaobin You
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Ying Yao
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Pengyutian Liu
- School of Pharmacy, Shenzhen University Medical School, Shenzhen University, Shenzhen 518055, China
| | - Lu Chen
- School of Pharmacy, Shenzhen University Medical School, Shenzhen University, Shenzhen 518055, China
| | - Yubao Xie
- School of Pharmacy, Shenzhen University Medical School, Shenzhen University, Shenzhen 518055, China
| | - Guofeng Li
- School of Pharmacy, Shenzhen University Medical School, Shenzhen University, Shenzhen 518055, China
| | - Liang Hong
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
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2
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Gabriel P, Almehmadi YA, Wong ZR, Dixon DJ. A General Iridium-Catalyzed Reductive Dienamine Synthesis Allows a Five-Step Synthesis of Catharanthine via the Elusive Dehydrosecodine. J Am Chem Soc 2021; 143:10828-10835. [PMID: 34254792 PMCID: PMC8397322 DOI: 10.1021/jacs.1c04980] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Indexed: 02/08/2023]
Abstract
A new reductive strategy for the stereo- and regioselective synthesis of functionalized isoquinuclidines has been developed. Pivoting on the chemoselective iridium(I)-catalyzed reductive activation of β,γ-unsaturated δ-lactams, the efficiently produced reactive dienamine intermediates readily undergo [4 + 2] cycloaddition reactions with a wide range of dienophiles, resulting in the formation of bridged bicyclic amine products. This new synthetic approach was extended to aliphatic starting materials, resulting in the efficient formation of cyclohexenamine products, and readily applied as the key step in the shortest (five-step) total synthesis of vinca alkaloid catharanthine to date, proceeding via its elusive biosynthetic precursor, dehydrosecodine.
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Affiliation(s)
- Pablo Gabriel
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Yaseen A. Almehmadi
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
- Department
of Chemistry, Rabigh College of Science and Arts, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Zeng Rong Wong
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Darren J. Dixon
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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3
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α-Functionally Substituted α,β-Unsaturated Aldehydes as Fine Chemicals Reagents: Synthesis and Application. Molecules 2021; 26:molecules26144297. [PMID: 34299572 PMCID: PMC8306155 DOI: 10.3390/molecules26144297] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/12/2021] [Accepted: 07/14/2021] [Indexed: 11/16/2022] Open
Abstract
α-Functionalized α,β-unsaturated aldehydes is an important class of compounds, which are widely used in fine organic synthesis, biology, medicine and pharmacology, chemical industry, and agriculture. Some of the 2-substituted 2-alkenals are found to be the key metabolites in plant and animal cells. Therefore, the development of efficient methods for their synthesis attracts the attention of organic chemists. This review focusses on the recent advances in the synthesis of 2-functionally substituted 2-alkenals. The approaches to the preparation of α-alkyl α,β-unsaturated aldehydes are not included in this review.
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4
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Yadav J, Pawar AP, Nagare YK, Iype E, Rangan K, Ohshita J, Kumar D, Kumar I. Direct Amine-Catalyzed Enantioselective Synthesis of Pentacyclic Dibenzo[ b, f][1,4]oxazepine/Thiazepine-Fused Isoquinuclidines along with DFT Calculations. J Org Chem 2020; 85:14094-14108. [PMID: 33030896 DOI: 10.1021/acs.joc.0c02141] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A direct protocol for the asymmetric synthesis of dibenzoxazepine/thiazepine-fused [2.2.2] isoquinuclidines is developed. The reaction proceeds through a proline-catalyzed direct Mannich reaction followed by an intramolecular aza-Michael cascade sequence between 2-cyclohexene-1-one and various tricyclic imines, like dibenzoxazepines/thiazepines, as an overall [4 + 2] aza-Diels-Alder reaction. A series of pentacyclic isoquinuclidines have been prepared, with complete endo-selectivity, in good to high yields and excellent enantioselectivity (>99:1). Density functional theory (DFT) calculations further support the observed high stereochemical outcome of the reaction.
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Affiliation(s)
- Jyothi Yadav
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Pilani 333031, Rajasthan, India
| | - Amol Prakash Pawar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Pilani 333031, Rajasthan, India
| | - Yadav Kacharu Nagare
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Pilani 333031, Rajasthan, India
| | - Eldhose Iype
- Department of Chemical Engineering, Birla Institute of Technology and Science, Pilani, Dubai Campus, Dubai 345055, UAE
| | - Krishnan Rangan
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Hyderabad 500078, Telangana, India
| | - Joji Ohshita
- Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Dalip Kumar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Pilani 333031, Rajasthan, India
| | - Indresh Kumar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Pilani 333031, Rajasthan, India
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5
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Ramaraju P, Pawar AP, Iype E, Mir NA, Choudhary S, Sharma DK, Kant R, Kumar I. Enantio- and Diastereoselective Two-Pot Synthesis of Isoquinuclidines from Glutaraldehyde and N-Aryl Imines with DFT Calculations. J Org Chem 2019; 84:12408-12419. [PMID: 31486644 DOI: 10.1021/acs.joc.9b01865] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A pot-economic method for the enantio- and diastereoselective synthesis of a [2.2.2] azabicyclic isoquinuclidine system is developed. This protocol involves the proline-catalyzed direct Mannich reaction-cyclization/IBX-mediated site-selective oxidation/NaBH4-reduction sequence between glutaraldehyde and imines to generate in situ chiral 1,2-DHPs, followed by the diastereoselective Diels-Alder reaction with N-aryl maleimides furnishing isoquinuclidines in overall five steps. A variety of isoquinuclidines having five-contiguous chiral centers, including an all-carbon quaternary, were prepared with high yields (up to 78%) and excellent stereoselectivity (>50:1 dr, and up to >99:1 er). DFT calculations support the observed high stereoselective reaction outcome.
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Affiliation(s)
- Panduga Ramaraju
- Department of Chemistry , Birla Institute of Technology and Science , Pilani 333 031 , Rajasthan , India
| | - Amol Prakash Pawar
- Department of Chemistry , Birla Institute of Technology and Science , Pilani 333 031 , Rajasthan , India
| | - Eldhose Iype
- Department of Chemical Engineering , BITS Pilani, Dubai Campus , Dubai 345055 , UAE
| | - Nisar A Mir
- Department of Chemistry , Birla Institute of Technology and Science , Pilani 333 031 , Rajasthan , India
| | - Sachin Choudhary
- Department of Chemistry , Birla Institute of Technology and Science , Pilani 333 031 , Rajasthan , India
| | - Devinder Kumar Sharma
- X-ray Crystallography Laboratory, Post-Graduate Department of Physics & Electronics , University of Jammu , Jammu 180 006 , India
| | - Rajni Kant
- X-ray Crystallography Laboratory, Post-Graduate Department of Physics & Electronics , University of Jammu , Jammu 180 006 , India
| | - Indresh Kumar
- Department of Chemistry , Birla Institute of Technology and Science , Pilani 333 031 , Rajasthan , India
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6
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Kono M, Harada S, Nozaki T, Hashimoto Y, Murata SI, Gröger H, Kuroda Y, Yamada KI, Takasu K, Hamada Y, Nemoto T. Asymmetric Formal Synthesis of (+)-Catharanthine via Desymmetrization of Isoquinuclidine. Org Lett 2019; 21:3750-3754. [PMID: 31021094 DOI: 10.1021/acs.orglett.9b01198] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Although (+)-catharanthine is an attractive alkaloid for both clinical research and organic synthetic chemistry, only a limited number of approaches for its catalytic asymmetric synthesis exist. Herein, we describe a novel strategy for synthesizing a chiral intermediate of (+)-catharanthine via phosphoric acid-catalyzed asymmetric desymmetrization of a meso-isoquinuclidine possessing a 1,3-diol unit that was synthesized by a formal amide insertion reaction.
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Affiliation(s)
- Masato Kono
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1, Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Shingo Harada
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1, Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Tomoyuki Nozaki
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1, Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Yoshinori Hashimoto
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1, Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Shun-Ichi Murata
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1, Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Harald Gröger
- Chair of Organic Chemistry I, Faculty of Chemistry , Bielefeld University , Universitätsstraße 25 , 33615 Bielefeld , Germany
| | - Yusuke Kuroda
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Ken-Ichi Yamada
- Graduate School of Pharmaceutical Sciences , Tokushima University , Shomachi, Tokushima 770-8505 , Japan
| | - Kiyosei Takasu
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Yasumasa Hamada
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1, Inohana , Chuo-ku, Chiba 260-8675 , Japan
| | - Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1, Inohana , Chuo-ku, Chiba 260-8675 , Japan.,Molecular Chirality Research Center , Chiba University , 1-33, Yayoi-cho , Inage-ku, Chiba 263-8522 , Japan
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7
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Bulman Page PC, Kinsey FS, Chan Y, Strutt IR, Slawin AMZ, Jones GA. Novel binaphthyl and biphenyl α- and β-amino acids and esters: organocatalysis of asymmetric Diels-Alder reactions. A combined synthetic and computational study. Org Biomol Chem 2018; 16:7400-7416. [PMID: 30259945 DOI: 10.1039/c8ob01795f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Asymmetric catalysis of the Diels-Alder reaction between cyclopentadiene and cinnamaldehydes has been studied using as catalysts a range of novel α- and β-aminoacids and aminoesters with binaphthyl and biphenyl backbones, providing enantioselectivities of up to 62% ee. B3LYP/6-31G* calculations, including free energy corrections, have been carried out on a binaphthyl catalyst example to identify transition state structures and to aid in the identification of major enantiomers. The calculated product ratios agree well with the experimental data; the transition states identified involve preferential approach of cyclopentene along a trajectory adjacent to the acid/ester group. The four lowest energy transition states display a stabilizing dipolar interaction between the carbonyl group oxygen atom and a terminal proton of the diene unit.
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Affiliation(s)
- Philip C Bulman Page
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.
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8
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Kim SJ, Batey RA. Enantioselective isoquinuclidine synthesis via sequential Diels–Alder/visible-light photoredox C–C bond cleavage: a formal synthesis of the indole alkaloid catharanthine. Org Chem Front 2018. [DOI: 10.1039/c8qo00849c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enantioselective formation of isoquinuclidines useful for alkaloid synthesis is achieved through an organocatalyzed Diels–Alder reaction of dihydropyridines with acrolein and a subsequent photoredox catalyzed oxidative deformylation reaction.
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Affiliation(s)
- Simon J. Kim
- Davenport Research Laboratories
- Dept. of Chemistry
- University of Toronto
- Toronto
- Canada
| | - Robert A. Batey
- Davenport Research Laboratories
- Dept. of Chemistry
- University of Toronto
- Toronto
- Canada
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9
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Faisal M, Shahzad D, Saeed A, Lal B, Saeed S, Larik FA, Channar PA, Mahesar PA, Mahar J. Review on asymmetric synthetic methodologies for chiral isoquinuclidines; 2008 to date. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2017.10.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Zhou Y, Lu Y, Hu X, Mei H, Lin L, Liu X, Feng X. Highly diastereo- and enantioselective synthesis of spirooxindole-cyclohexaneamides through N,N′-dioxide/Ni(ii)-catalyzed Diels–Alder reactions. Chem Commun (Camb) 2017; 53:2060-2063. [DOI: 10.1039/c6cc10125a] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New kinds of spirooxindole-cyclohexaneamides were achieved in up to 99% yield, >95 : 5 dr, and 99% ee via N,N′-dioxide/Ni(ii)-catalyzed Diels–Alder reactions.
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Affiliation(s)
- Yuhang Zhou
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Yan Lu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xinyue Hu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Hongjiang Mei
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
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11
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Hayashi Y, Bondzic BP, Yamazaki T, Gupta Y, Ogasawara S, Taniguchi T, Monde K. Asymmetric Diels-Alder Reaction of α-Substituted and β,β-Disubstituted α,β-Enals via Diarylprolinol Silyl Ether for the Construction of All-Carbon Quaternary Stereocenters. Chemistry 2016; 22:15874-15880. [PMID: 27601216 DOI: 10.1002/chem.201602345] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Indexed: 11/11/2022]
Abstract
The asymmetric Diels-Alder reaction of α-substituted acrolein proceeds in the presence of the trifluoroacetic acid salt of trifluoromethyl-substituted diarylprolinol silyl ether to afford the exo-isomer with both excellent diastereoselectivity and high enantioselectivity. In the Diels-Alder reaction of a β,β-disubstituted α,β-unsaturated aldehyde, good exo-selectivity and excellent enantioselectivity was obtained when the perchloric acid salt of the bulky triisopropyl silyl ether of trifluoromethyl substituted diarylprolinol was employed as an organocatalyst in the presence of water. In both cases, all-carbon quaternary stereocenters are constructed enantioselectively.
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Affiliation(s)
- Yujiro Hayashi
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan. .,Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan.
| | - Bojan P Bondzic
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Tatsuya Yamazaki
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Yogesh Gupta
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan
| | - Shin Ogasawara
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan
| | - Tohru Taniguchi
- Faculty of Advanced Life Science, Frontier Research Center for Advanced Material and Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo, 001-0021, Japan
| | - Kenji Monde
- Faculty of Advanced Life Science, Frontier Research Center for Advanced Material and Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo, 001-0021, Japan
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12
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Zhang Y, Xue Y, Li G, Yuan H, Luo T. Enantioselective synthesis of Iboga alkaloids and vinblastine via rearrangements of quaternary ammoniums. Chem Sci 2016; 7:5530-5536. [PMID: 30034694 PMCID: PMC6021789 DOI: 10.1039/c6sc00932h] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 05/13/2016] [Indexed: 11/21/2022] Open
Abstract
An efficient and novel strategy for the enantioselective syntheses of various iboga alkaloids has been developed. The salient features include a gold-catalyzed oxidation of a terminal alkyne followed by cyclization, a Stevens rearrangement and a tandem sequence that combines the gold-catalyzed oxidation, cyclization and [1,2]-shift. The catharanthine analogs provided by our approach were further converted to the vinca alkaloid vinblastine and its analogs, which confirmed the remarkable sensitivity of the cytotoxicity to the C20' substituent of vinblastine.
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Affiliation(s)
- Yun Zhang
- Laboratory of Chemical Genomics , School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen 518055 , China
| | - Yibin Xue
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and Molecular Engineering , Peking-Tsinghua Center for Life Sciences , Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China .
| | - Gang Li
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and Molecular Engineering , Peking-Tsinghua Center for Life Sciences , Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China .
| | - Haosen Yuan
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and Molecular Engineering , Peking-Tsinghua Center for Life Sciences , Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China .
| | - Tuoping Luo
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and Molecular Engineering , Peking-Tsinghua Center for Life Sciences , Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China .
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13
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Reddy UVS, Chennapuram M, Seki C, Kwon E, Okuyama Y, Nakano H. Catalytic Efficiency of Primary β-Amino Alcohols and Their Derivatives in Organocatalysis. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600164] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ummareddy Venkata Subba Reddy
- Synthetic Organic Chemistry Lab; Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Madhu Chennapuram
- Synthetic Organic Chemistry Lab; Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Chigusa Seki
- Synthetic Organic Chemistry Lab; Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules; Graduate School of Sciences; Tohoku University; 6-3 Aoba, Aramaki, Aoba-ku 980-8578 Sendai Japan
| | - Yuko Okuyama
- Tohoku Pharmaceutical University; 4-4-1 Komatsushima, Aoba-ku 981-8558 Sendai Japan
| | - Hiroto Nakano
- Synthetic Organic Chemistry Lab; Department of Bioengineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto 050-8585 Muroran Japan
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14
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Nishikawa Y, Nakano S, Tahira Y, Terazawa K, Yamazaki K, Kitamura C, Hara O. Chiral Pyridinium Phosphoramide as a Dual Brønsted Acid Catalyst for Enantioselective Diels–Alder Reaction. Org Lett 2016; 18:2004-7. [DOI: 10.1021/acs.orglett.6b00608] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yasuhiro Nishikawa
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama,
Tempaku-ku, Nagoya, Aichi 468-8503, Japan
| | - Saki Nakano
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama,
Tempaku-ku, Nagoya, Aichi 468-8503, Japan
| | - Yuu Tahira
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama,
Tempaku-ku, Nagoya, Aichi 468-8503, Japan
| | - Kanako Terazawa
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama,
Tempaku-ku, Nagoya, Aichi 468-8503, Japan
| | - Ken Yamazaki
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama,
Tempaku-ku, Nagoya, Aichi 468-8503, Japan
| | - Chitoshi Kitamura
- Department
of Materials Science, School of Engineering, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga 522-8533, Japan
| | - Osamu Hara
- Faculty
of Pharmacy, Meijo University, 150 Yagotoyama,
Tempaku-ku, Nagoya, Aichi 468-8503, Japan
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15
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Hatano M, Goto Y, Izumiseki A, Akakura M, Ishihara K. Boron Tribromide-Assisted Chiral Phosphoric Acid Catalyst for a Highly Enantioselective Diels–Alder Reaction of 1,2-Dihydropyridines. J Am Chem Soc 2015; 137:13472-5. [DOI: 10.1021/jacs.5b08693] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Manabu Hatano
- Graduate
School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Yuta Goto
- Graduate
School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Atsuto Izumiseki
- Graduate
School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Matsujiro Akakura
- Department
of Chemistry, Aichi University of Education, Igaya-cho, Kariya 448-8542, Japan
| | - Kazuaki Ishihara
- Graduate
School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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16
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Zhang X, Xu XM, Zhao L, You J, Zhu J, Wang MX. Synthesis of diverse di- to penta-substituted 1,2-dihydropyridine derivatives from gold(I)-catalyzed intramolecular addition of tertiary enamides to alkynes. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.105] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Undeela S, Thadkapally S, Nanubolu JB, Singarapu KK, Menon RS. Catalyst-controlled divergence in cycloisomerisation reactions of N-propargyl-N-vinyl sulfonamides: gold-catalysed synthesis of 2-sulfonylmethyl pyrroles and dihydropyridines. Chem Commun (Camb) 2015; 51:13748-51. [DOI: 10.1039/c5cc04871k] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Gold-catalysed, divergent synthesis of 2-sulfonylmethyl pyrroles and dihydropyridines from readily available N-propargyl-N-vinyl sulfonamides is reported.
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Affiliation(s)
- Sridhar Undeela
- Medicinal Chemistry and Pharmacology Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad
- India
| | - Srinivas Thadkapally
- Medicinal Chemistry and Pharmacology Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad
- India
| | | | - Kiran Kumar Singarapu
- Centre for Nuclear Magnetic Resonance
- CSIR-Indian Institute of Chemical Technology
- Hyderabad
- India
| | - Rajeev S. Menon
- Medicinal Chemistry and Pharmacology Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad
- India
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