1
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Sugano M, Inokuma T, Yamaoka Y, Yamada KI. 5- exo-Selective asymmetric bromolactonization of stilbenecarboxylic acids catalyzed by phenol-bearing chiral thiourea. Org Biomol Chem 2024; 22:1765-1769. [PMID: 38099597 DOI: 10.1039/d3ob01895d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
We developed a novel thiourea Lewis-base catalyst with phenol moieties for the enantioselective 5-exo-bromolactonization of stilbenecarboxylic acids to afford chiral 3-substituted phthalides. The phenol moieties are crucial for the enantio- and regio-selectivity.
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Affiliation(s)
- Masayuki Sugano
- Graduate School of Pharmaceutical Sciences, Tokushima University, Shomachi, Tokushima 770-8505, Japan.
| | - Tsubasa Inokuma
- Graduate School of Pharmaceutical Sciences, Tokushima University, Shomachi, Tokushima 770-8505, Japan.
- Research Cluster on "Key Material Development, " Tokushima University, Shomachi, Tokushima 770-8505, Japan
| | - Yousuke Yamaoka
- 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.
- Research Cluster on "Key Material Development, " Tokushima University, Shomachi, Tokushima 770-8505, Japan
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2
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Nishiyori R, Okuno K, Chan B, Shirakawa S. Chiral Bifunctional Selenide Catalysts for Asymmetric Iodolactonizations. Chem Pharm Bull (Tokyo) 2022; 70:599-604. [DOI: 10.1248/cpb.c22-00049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Ryuichi Nishiyori
- Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University
| | - Ken Okuno
- Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University
| | - Bun Chan
- Graduate School of Engineering, Nagasaki University
| | - Seiji Shirakawa
- Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University
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3
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Liu Y, Cao G, Chen L, Li K, Lin X, Xu X, Le Z, Yang G. Synthesis of 3,3′‐Disubstituted Isobenzofuran‐1(3
H
)‐Ones via Cs
0.5
H
2.5
PW
12
O
40
‐Catalyzed Difunctionalization of Carbonyls. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200081] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yu‐Feng Liu
- Jiangxi Province Key Laboratory of Synthetic Chemistry Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of Technology Nanchang 330013 People's Republic of China
| | - Gang‐Ming Cao
- Jiangxi Province Key Laboratory of Synthetic Chemistry Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of Technology Nanchang 330013 People's Republic of China
| | - Lei Chen
- School of Earth Sciences East China University of Technology Nanchang 330013 People's Republic of China
| | - Ke Li
- Jiangxi Province Key Laboratory of Synthetic Chemistry Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of Technology Nanchang 330013 People's Republic of China
| | - Xiao‐Ling Lin
- Jiangxi Province Key Laboratory of Synthetic Chemistry Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of Technology Nanchang 330013 People's Republic of China
| | - Xin‐Xin Xu
- Department of Chemistry College of Science Northeastern University Shenyang Liaoning 110819 People's Republic of China
| | - Zhang‐Gao Le
- Jiangxi Province Key Laboratory of Synthetic Chemistry Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of Technology Nanchang 330013 People's Republic of China
| | - Guo‐Ping Yang
- Jiangxi Province Key Laboratory of Synthetic Chemistry Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of Technology Nanchang 330013 People's Republic of China
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4
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Yan J, Zhou Z, He Q, Chen G, Wei H, Xie W. The applications of catalytic asymmetric halocyclization in natural product synthesis. Org Chem Front 2022. [DOI: 10.1039/d1qo01395e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Catalytic asymmetric halocyclization of olefinic substrate has evolved rapidly and been well utilized as a practical strategy for constructing enantioenriched cyclic skeletons in natural product synthesis.
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Affiliation(s)
- Jiahang Yan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Zhiqiang Zhou
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Qiaoqiao He
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Guzhou Chen
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Hongbo Wei
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Weiqing Xie
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, Shaanxi 712100, China
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5
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Touchet S, Yeardley C, O'Hara CT, Gros PC. Critical Ligand and Salt Effects in Organomagnesiate‐Promoted 3,3‐Disubstituted Phthalides Synthesis from 2‐Iodobenzoate Derivatives. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Callum Yeardley
- WestCHEM University of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
| | - Charles T. O'Hara
- WestCHEM University of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
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6
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Jiang X, Xu X, Xu W, Yu P, Yeung YY. Catalytic Enantioselective Halocyclizations to Access Benzoxazepinones and Benzoxazecinones. Org Lett 2021; 23:6316-6320. [PMID: 34342993 DOI: 10.1021/acs.orglett.1c02117] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a catalytic asymmetric halocyclization protocol to furnish benzoxazepinones and benzoxazecinones using (DHQ)2PHAL as the catalyst. Various halogenated benzoxazepinones and benzoxazecinones were achieved in excellent yields and enantioselectivities under mild conditions. A cocrystal structure of the substrate and the catalyst was studied.
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Affiliation(s)
- Xiaojian Jiang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Xi Xu
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Wei Xu
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Pei Yu
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Ying-Yeung Yeung
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
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7
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Chan YC, Wang X, Lam YP, Wong J, Tse YLS, Yeung YY. A Catalyst-Controlled Enantiodivergent Bromolactonization. J Am Chem Soc 2021; 143:12745-12754. [PMID: 34350758 DOI: 10.1021/jacs.1c05680] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A catalyst-controlled enantiodivergent bromolactonization of olefinic acids has been developed. Quinine-derived amino-amides bearing the same chiral core but different achiral aryl substituents were used as the catalysts. Switching the methoxy substituent in the aryl amide system from meta- to ortho-position results in a complete switch in asymmetric induction to afford the desired lactone in good enantioselectivity and yield. Mechanistic studies, including chemical experiments and density functional theory calculations, reveal that the differences in steric and electronic effects of the catalyst substituent alter the reaction mechanism.
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Affiliation(s)
- Yuk-Cheung Chan
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Xinyan Wang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Ying-Pong Lam
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Jonathan Wong
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Ying-Lung Steve Tse
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Ying-Yeung Yeung
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
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8
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Zhang J, Jalil A, He J, Yu Z, Cheng Y, Li G, Du Y, Zhao K. Lactonization with concomitant 1,2-aryl migration and alkoxylation mediated by dialkoxyphenyl iodides generated in situ. Chem Commun (Camb) 2021; 57:7426-7429. [PMID: 34231573 DOI: 10.1039/d1cc03110d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of alkoxylated isobenzofuranones were conveniently synthesized from the reaction of 2-(1-arylvinyl)benzoic acids with PhI(OR)2, generated in situ from the reaction of iodosobenzene (PhIO) with alkyl alcohols. This hypervalent iodine mediated one-pot transformation is postulated to undergo a cascade reaction involving lactonization, 1,2-aryl migration and alkoxylation processes. The organocatalytic and chiral organoiodine-catalyzed asymmetric reactions of the current transformation were also probed.
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Affiliation(s)
- Jingran Zhang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China.
| | - Ayesha Jalil
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China.
| | - Jiaxin He
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China.
| | - Zhenyang Yu
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China.
| | - Yifu Cheng
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China.
| | - Guangchen Li
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China.
| | - Yunfei Du
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China.
| | - Kang Zhao
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao 266237, China.
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9
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Maria Faisca Phillips A, Pombeiro AJL. Recent Developments in Enantioselective Organocatalytic Cascade Reactions for the Construction of Halogenated Ring Systems. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100364] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ana Maria Faisca Phillips
- Centro de Química Estrutural Instituto Superior Técnico Universidade de Lisboa Av. Rovisco Pais 1049-001 Lisboa Portugal
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural Instituto Superior Técnico Universidade de Lisboa Av. Rovisco Pais 1049-001 Lisboa Portugal
- Рeoples' Friendship University of Russia RUDN University) 6 Miklukho-Maklaya Street Moscow 117198 Russian Federation
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10
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Han B, He XH, Liu YQ, He G, Peng C, Li JL. Asymmetric organocatalysis: an enabling technology for medicinal chemistry. Chem Soc Rev 2021; 50:1522-1586. [PMID: 33496291 DOI: 10.1039/d0cs00196a] [Citation(s) in RCA: 162] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The efficacy and synthetic versatility of asymmetric organocatalysis have contributed enormously to the field of organic synthesis since the early 2000s. As asymmetric organocatalytic methods mature, they have extended beyond the academia and undergone scale-up for the production of chiral drugs, natural products, and enantiomerically enriched bioactive molecules. This review provides a comprehensive overview of the applications of asymmetric organocatalysis in medicinal chemistry. A general picture of asymmetric organocatalytic strategies in medicinal chemistry is firstly presented, and the specific applications of these strategies in pharmaceutical synthesis are systematically described, with a focus on the preparation of antiviral, anticancer, neuroprotective, cardiovascular, antibacterial, and antiparasitic agents, as well as several miscellaneous bioactive agents. The review concludes with a discussion of the challenges, limitations and future prospects for organocatalytic asymmetric synthesis of medicinally valuable compounds.
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Affiliation(s)
- Bo Han
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Xiang-Hong He
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Yan-Qing Liu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Gu He
- State Key Laboratory of Biotherapy and Cancer Centre, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Jun-Long Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China. and Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China.
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11
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Synthesis of C3-Symmetric Cinchona-Based Organocatalysts and Their Applications in Asymmetric Michael and Friedel–Crafts Reactions. Symmetry (Basel) 2021. [DOI: 10.3390/sym13030521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In this work, anchoring of cinchona derivatives to trifunctional cores (hub approach) was demonstrated to obtain size-enlarged organocatalysts. By modifying the cinchona skeleton in different positions, we prepared four C3-symmetric size-enlarged cinchona derivatives (hub-cinchonas), which were tested as organocatalysts and their catalytic activities were compared with the parent cinchona (hydroquinine) catalyst. We showed that in the hydroxyalkylation reaction of indole, hydroquinine provides good enantioselectivities (up to 73% ee), while the four new size-enlarged derivatives resulted in significantly lower values (up to 29% ee) in this reaction. Anchoring cinchonas to trifunctional cores was found to facilitate nanofiltration-supported catalyst recovery using the PolarClean alternative solvent. The C3-symmetric size-enlarged organocatalysts were completely rejected by all the applied membranes, whereas the separation of hydroquinine was found to be insufficient when using organic solvent nanofiltration. Furthermore, the asymmetric catalysis was successfully demonstrated in the case of the Michael reaction of 1,3-diketones and trans-β-nitrostyrene using Hub3-cinchona (up to 96% ee) as a result of the positive effect of the C3-symmetric structure using a bulkier substrate. This equates to an increased selectivity of the catalyst in comparison to hydroquinine in the latter Michael reaction.
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12
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Li J, Shi Y. Catalytic enantioselective bromohydroxylation of cinnamyl alcohols. RSC Adv 2021; 11:13040-13046. [PMID: 35423889 PMCID: PMC8697332 DOI: 10.1039/d1ra02297k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 03/23/2021] [Indexed: 11/21/2022] Open
Abstract
This work describes an effective enantioselective bromohydroxylation of cinnamyl alcohols with (DHQD)2PHAL as the catalyst and H2O as the nucleophile, providing a variety of corresponding optically active bromohydrins with up to 95% ee. Optically active bromohydrins are obtained with up to 95% ee via asymmetric bromohydroxylation of cinnamyl alcohols with H2O as nucleophile.![]()
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Affiliation(s)
- Jing Li
- Institute of Natural and Synthetic Organic Chemistry
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Yian Shi
- Institute of Natural and Synthetic Organic Chemistry
- Changzhou University
- Changzhou 213164
- P. R. China
- Department of Chemistry
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13
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Wang H, Zhong H, Xu X, Xu W, Jiang X. Catalytic Enantioselective Bromoaminocyclization and Bromocycloetherification. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000845] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Haitao Wang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE) College of Pharmacy Jinan University Guangzhou 510632 People's Republic of China
| | - Haijing Zhong
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE) College of Pharmacy Jinan University Guangzhou 510632 People's Republic of China
| | - Xi Xu
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE) College of Pharmacy Jinan University Guangzhou 510632 People's Republic of China
| | - Wei Xu
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE) College of Pharmacy Jinan University Guangzhou 510632 People's Republic of China
| | - Xiaojian Jiang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE) College of Pharmacy Jinan University Guangzhou 510632 People's Republic of China
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14
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Yang XC, Xu M, Wang JB, Liu MM, Mathey F, Hua YZ, Wang MC. Enantioselective synthesis of indanone spiro-isochromanone derivatives via a dinuclear zinc-catalyzed Michael/transesterification tandem reaction. Org Biomol Chem 2020; 18:3917-3926. [PMID: 32400845 DOI: 10.1039/d0ob00541j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enantioselective Michael/transesterification tandem reaction of α-hydroxy indanones with ortho-ester chalcones was realized using dinuclear zinc catalysts. A series of enantiomerically pure spiro[indanone-2,3'-isochromane-1-one] derivatives were obtained in good yields with excellent stereoselectivities (up to >20 : 1 dr, up to >99% ee). This protocol could be conducted on a gram scale without affecting its stereoselectivities. In addition, the absolute stereochemistry of the products was determined by X-ray crystallographic analysis of 3ac, and a positive nonlinear effect was observed. Finally, a possible catalytic cycle was proposed to explain the origin of the enantioselectivity.
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Affiliation(s)
- Xiao-Chao Yang
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - Meng Xu
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - Jin-Bao Wang
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - Meng-Meng Liu
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - François Mathey
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - Yuan-Zhao Hua
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - Min-Can Wang
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
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15
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Sicignano M, Schettini R, Pierri G, Marino ML, Izzo I, De Riccardis F, Bernardi L, Sala GD. An Entry to Enantioenriched 3,3-Disubstituted Phthalides through Asymmetric Phase-Transfer-Catalyzed γ-Alkylation. J Org Chem 2020; 85:7476-7484. [PMID: 32403930 PMCID: PMC8007094 DOI: 10.1021/acs.joc.0c00880] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
![]()
A novel
asymmetric phase-transfer-catalyzed γ-alkylation
of phthalide 3-carboxylic esters has been developed, giving access
to 3,3-disubstituted phthalide derivatives, which present a chiral
quaternary γ-carbon in good to excellent yields and good enantioselectivities
(74–88% ee). The enantiomeric purity could be substantially
enhanced to 94–95% ee by recrystallization. Both electron-withdrawing
and electron-releasing substituents are well tolerated on the phthalide
core as well as on the aromatic moiety of the alkylating agent. This
methodology, enabling the introduction of an unfunctionalized group
at the phthalide γ-position, fully complements previously reported
organocatalytic strategies involving functionalized electrophiles,
thus expanding the scope of accessible 3,3-disubstituted products.
The high synthetic value of this asymmetric reaction has been proven
by the formal synthesis of the naturally occurring alkaloid (+)-(9S,13R)-13-hydroxyisocyclocelabenzine.
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Affiliation(s)
- Marina Sicignano
- Dipartimento di Chimica e Biologia "A. Zambelli", Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Rosaria Schettini
- Dipartimento di Chimica e Biologia "A. Zambelli", Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Giovanni Pierri
- Dipartimento di Chimica e Biologia "A. Zambelli", Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Maria Leda Marino
- Dipartimento di Chimica e Biologia "A. Zambelli", Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Irene Izzo
- Dipartimento di Chimica e Biologia "A. Zambelli", Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Francesco De Riccardis
- Dipartimento di Chimica e Biologia "A. Zambelli", Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Luca Bernardi
- Department of Industrial Chemistry "Toso Montanari" & INSTM RU Bologna, Alma Mater Studiorum University of Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - Giorgio Della Sala
- Dipartimento di Chimica e Biologia "A. Zambelli", Universitá degli Studi di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
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16
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Tamanna, Kumar M, Joshi K, Chauhan P. Catalytic Asymmetric Synthesis of Isochroman Derivatives. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000243] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Tamanna
- Department of Chemistry.Indian Institute of Technology Jammu Jagti NH 44, Nagrota Bypass Jammu (J & K) 181221 India
| | - Mukesh Kumar
- Department of ChemistrySahu Jain College Najibabad, Bijnor 246763 India
| | - Kavita Joshi
- Department of Chemistry.Indian Institute of Technology Jammu Jagti NH 44, Nagrota Bypass Jammu (J & K) 181221 India
| | - Pankaj Chauhan
- Department of Chemistry.Indian Institute of Technology Jammu Jagti NH 44, Nagrota Bypass Jammu (J & K) 181221 India
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17
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Grabarczyk M, Wińska K, Mączka W. An Overview of Synthetic Methods for the Preparation of Halolactones. Curr Org Synth 2020; 16:98-111. [PMID: 31965924 DOI: 10.2174/1570179415666180918152652] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 09/04/2018] [Accepted: 09/07/2018] [Indexed: 11/22/2022]
Abstract
Halolactones are used both in chemical synthesis as intermediates as well as in various industries. These compounds may be secondary metabolites of living organisms, although they are mainly obtained by chemical synthesis. The substrates for the synthesis of chloro-, bromo- and iodolactones are often unsaturated carboxylic acids, and sometimes they are unsaturated esters. The article presents a number of different methods for the production of halolactones, both racemic mixtures and enantiomerically enriched compounds.
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Affiliation(s)
- Małgorzata Grabarczyk
- Department of Chemistry, Wroclaw University of Environmental and Life Sciences, Norwida 25, 50-375 Wroclaw, Poland
| | - Katarzyna Wińska
- Department of Chemistry, Wroclaw University of Environmental and Life Sciences, Norwida 25, 50-375 Wroclaw, Poland
| | - Wanda Mączka
- Department of Chemistry, Wroclaw University of Environmental and Life Sciences, Norwida 25, 50-375 Wroclaw, Poland
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18
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Xing L, Zhang Y, Zhang Y, Ai Z, Li X, Du Y, Deng J, Zhao K. Regioselective Chlorolactonization of Styrene-Type Carboxylic Esters and Amides via PhICl 2-Mediated Oxidative C-O/C-Cl Bond Formations. J Org Chem 2019; 84:13832-13840. [PMID: 31525875 DOI: 10.1021/acs.joc.9b02022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A facile method employing styrene-type carboxylic esters or amides in the presence of PhICl2 in CH3CN was developed to achieve the synthesis of 6-endo products 3,4-dihydroisocoumarins or 3,4-dihydroisocoumarin-1-imines in good to high yields. This metal-free regioselective intramolecular chlorolactonization process was proposed to involve a PhICl2-mediated oxidative C-O bond formation followed by C-Cl bond formation.
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Affiliation(s)
- Linlin Xing
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
| | - Yong Zhang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
| | - Yilin Zhang
- C. Eugene Bennett Department of Chemistry , West Virginia University , Morgantown , West Virginia 26506-6045 , United States
| | - Zhenkang Ai
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
| | - Xuemin Li
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
| | - Yunfei Du
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
| | - Jun Deng
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences , Chongqing University , Chongqing 401331 , China
| | - Kang Zhao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , China
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19
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Gan M, Wang W, Wang H, Wang Y, Jiang X. Enantioselective Halolactonizations Using Amino-Acid-Derived Phthalazine Catalysts. Org Lett 2019; 21:8275-8279. [PMID: 31584284 DOI: 10.1021/acs.orglett.9b03028] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Amino-acid-derived phthalazine catalysts have been designed and synthesized for enantioselective halolactonization of prochiral dienoic acids. The scope of the reaction is evidenced by 17 examples of spiro α-exo-methylene-halolactones with up to 99.8% enantiomeric excess. The resulting enantio-enriched spiro halolactone products are found to exhibit potent antitumor effects. In addition, both antipodes of products with equally excellent enantioselevity could be obtained since a pair of enantiomeric catalysts is guaranteed.
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Affiliation(s)
- Min Gan
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy , Jinan University , Guangzhou 510632 , China
| | - Wei Wang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy , Jinan University , Guangzhou 510632 , China
| | - Haitao Wang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy , Jinan University , Guangzhou 510632 , China
| | - Yuqiang Wang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy , Jinan University , Guangzhou 510632 , China
| | - Xiaojian Jiang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of Pharmacy , Jinan University , Guangzhou 510632 , China
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20
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Wang W, He H, Gan M, Wang H, Wang Y, Jiang X. Enantioselective Syntheses of α‐
exo
‐Methylene‐Lactones via Organocatalytic Halolactonization. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900728] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wei Wang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of PharmacyJinan University Guangzhou 510632 People's Republic of China
| | - Haoquan He
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of PharmacyJinan University Guangzhou 510632 People's Republic of China
| | - Min Gan
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of PharmacyJinan University Guangzhou 510632 People's Republic of China
| | - Haitao Wang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of PharmacyJinan University Guangzhou 510632 People's Republic of China
| | - Yuqiang Wang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of PharmacyJinan University Guangzhou 510632 People's Republic of China
| | - Xiaojian Jiang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), College of PharmacyJinan University Guangzhou 510632 People's Republic of China
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21
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Huang YM, Alharbi NS, Sun B, Shantharam CS, Rakesh KP, Qin HL. Synthetic routes and structure-activity relationships (SAR) of anti-HIV agents: A key review. Eur J Med Chem 2019; 181:111566. [PMID: 31401538 DOI: 10.1016/j.ejmech.2019.111566] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 07/25/2019] [Accepted: 07/26/2019] [Indexed: 01/05/2023]
Abstract
The worldwide increase of AIDS, an epidemic infection in constant development has an essential and still requires potent antiretroviral chemotherapeutic agents for reducing the integer of deaths caused by HIV. Thus, there is an urgent need for new anti-HIV drug candidates with increased strength, new targets, superior pharmacokinetic properties, and compact side effects. From this viewpoint, we first review present strategies of anti-HIV drug innovation and the synthesis of heterocyclic or natural compound as anti-HIV agents for facilitating the development of more influential and successful anti-HIV agents.
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Affiliation(s)
- Yu-Mei Huang
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, PR China
| | - Njud S Alharbi
- Biotechnology Research Group, Deportment of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Bing Sun
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, PR China.
| | - C S Shantharam
- Department of Chemistry, Pooja Bhagavath Memorial Mahajana Education Centre, Mysuru, 570016, Karnataka, India
| | - K P Rakesh
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, PR China.
| | - Hua-Li Qin
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, PR China.
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22
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Zheng J, He M, Xie B, Yang L, Hu Z, Zhou HB, Dong C. Enantioselective synthesis of novel pyrano[3,2-c]chromene derivatives as AChE inhibitors via an organocatalytic domino reaction. Org Biomol Chem 2019; 16:472-479. [PMID: 29265146 DOI: 10.1039/c7ob02794j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of optically active pyrano[3,2-c]chromenes have been synthesized through an asymmetric domino reaction of 4-hydroxy-2H-chromen-2-ones with malononitriles. The targeted molecules were obtained in excellent yields and enantioselectivities (up to 94% yield, 99% ee). The AChE inhibitory activity studies revealed that compounds 4n (IC50 = 21.3 μM) and 4p (IC50 = 19.2 μM) displayed potent acetylcholinesterase inhibition. In most cases, the S-enantiomers were superior to the corresponding R-enantiomers. Moreover, molecular modelling provides a practical method for understanding the enantioselective discrimination of AChE with these kinds of compounds.
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Affiliation(s)
- Jie Zheng
- State Key Laboratory of Virology, Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China.
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23
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Abstract
A concise and selective synthesis of the dichlorinated meroterpenoid azamerone is described. The paucity of tactics for the synthesis of natural-product-relevant chiral organochlorides motivated the development of unique strategies for accessing these motifs in enantioenriched forms. The route features a novel enantioselective chloroetherification reaction, a Pd-catalyzed cross-coupling between a quinone diazide and a boronic hemiester, and a late-stage tetrazine [4+2]-cycloaddition/oxidation cascade.
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Affiliation(s)
- Matthew L Landry
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Grace M McKenna
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Noah Z Burns
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
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24
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Wang J, Li X, Cheng JP. Quinine-derived thiourea promoted enantioselective Michael addition reactions of 3-substituted phthalides to maleimides. Sci China Chem 2019. [DOI: 10.1007/s11426-018-9393-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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25
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Okada M, Kaneko K, Yamanaka M, Shirakawa S. BINOL-derived bifunctional sulfide catalysts for asymmetric synthesis of 3,3-disubstituted phthalides via bromolactonization. Org Biomol Chem 2019; 17:3747-3751. [DOI: 10.1039/c9ob00417c] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
An efficient enantioselective synthesis of 3,3-disubstituted phthalides possessing a chiral quaternary carbon center was achieved via catalytic asymmetric bromolactonization using BINOL-derived bifunctional sulfide catalysts.
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Affiliation(s)
- Megumi Okada
- Department of Environmental Science
- Graduate School of Fisheries and Environmental Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Kazuma Kaneko
- Department of Chemistry and Research Center for Smart Molecules
- Faculty of Science
- Rikkyo University
- Tokyo 171-8501
- Japan
| | - Masahiro Yamanaka
- Department of Chemistry and Research Center for Smart Molecules
- Faculty of Science
- Rikkyo University
- Tokyo 171-8501
- Japan
| | - Seiji Shirakawa
- Department of Environmental Science
- Graduate School of Fisheries and Environmental Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
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26
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Klosowski DW, Hethcox JC, Paull DH, Fang C, Donald JR, Shugrue CR, Pansick AD, Martin SF. Enantioselective Halolactonization Reactions using BINOL-Derived Bifunctional Catalysts: Methodology, Diversification, and Applications. J Org Chem 2018; 83:5954-5968. [PMID: 29717607 PMCID: PMC5984189 DOI: 10.1021/acs.joc.8b00490] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A general protocol is described for inducing enantioselective halolactonizations of unsaturated carboxylic acids using novel bifunctional organic catalysts derived from a chiral binaphthalene scaffold. Bromo- and iodolactonization reactions of diversely substituted, unsaturated carboxylic acids proceed with high degrees of enantioselectivity, regioselectivity, and diastereoselectivity. Notably, these BINOL-derived catalysts are the first to induce the bromo- and iodolactonizations of 5-alkyl-4( Z)-olefinic acids via 5- exo mode cyclizations to give lactones in which new carbon-halogen bonds are created at a stereogenic center with high diastereo- and enantioselectivities. Iodolactonizations of 6-substituted-5( Z)-olefinic acids also occur via 6- exo cyclizations to provide δ-lactones with excellent enantioselectivities. Several notable applications of this halolactonization methodology were developed for desymmetrization, kinetic resolution, and epoxidation of Z-alkenes. The utility of these reactions is demonstrated by their application to a synthesis of precursors of the F-ring subunit of kibdelone C and to the shortest catalytic, enantioselective synthesis of (+)-disparlure reported to date.
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Affiliation(s)
- Daniel W. Klosowski
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712
| | - J. Caleb Hethcox
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712
| | | | | | | | | | - Andrew D. Pansick
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712
| | - Stephen F. Martin
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712
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27
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Jiang X, Liu S, Yang S, Jing M, Xu L, Yu P, Wang Y, Yeung YY. Enantioselective Bromolactonization of Deactivated Olefinic Acids. Org Lett 2018; 20:3259-3262. [DOI: 10.1021/acs.orglett.8b01125] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xiaojian Jiang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Shenghui Liu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Si Yang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Mei Jing
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Lipeng Xu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Pei Yu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Yuqiang Wang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Ying-Yeung Yeung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
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28
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Li X, He P, Zhou HB, Dong C. One-step pathway to selenoisobenzofuran-1(3H)-imine derivatives through highly selective selenocyclization of olefinic amides with benzeneselenyl chloride. Org Biomol Chem 2018. [PMID: 29517094 DOI: 10.1039/c8ob00179k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A 1,4-diazabicyclo[2.2.2]octane (DABCO) catalyzed selenocyclization of olefinic amides was achieved under mild reaction conditions. The reaction formed various benzeneselenyl substituted isobenzofuran-1(3H)-imine derivatives in good yields. The product was determined using single-crystal X-ray analysis. For compound 2u, the relative stereochemistry was established on the basis of NOESY NMR studies.
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Affiliation(s)
- Xiwang Li
- State Key Laboratory of Virology, Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China.
| | - Pei He
- State Key Laboratory of Virology, Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China.
| | - Hai-Bing Zhou
- State Key Laboratory of Virology, Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China.
| | - Chune Dong
- State Key Laboratory of Virology, Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China. and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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29
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Tan X, Pan H, Tian H, Shi Y. Phosphine oxide-Sc(OTf)3 catalyzed enantioselective bromoaminocyclization of tri-substituted allyl N-tosylcarbamates. Sci China Chem 2018. [DOI: 10.1007/s11426-017-9192-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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30
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Hu Y, Pan D, Cong L, Yao Y, Yu C, Li T, Yao C. NHC-Catalyzed Efficient Syntheses of Isoquinolinones or Isochromanones through Formal [4+2] Cycloaddition of o
-Quinodimethanes with Acylhydrazones or Ketones. ChemistrySelect 2018. [DOI: 10.1002/slct.201702925] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Yong Hu
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Di Pan
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Lin Cong
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Yibiao Yao
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Chenxia Yu
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Tuanjie Li
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Changsheng Yao
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
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31
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32
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Kozel V, Daniliuc CG, Kirsch P, Haufe G. C 3 -Symmetric Tricyclo[2.2.1.0 2,6 ]heptane-3,5,7-triol. Angew Chem Int Ed Engl 2017; 56:15456-15460. [PMID: 29044954 DOI: 10.1002/anie.201709279] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Indexed: 11/06/2022]
Abstract
A straightforward access to a hitherto unknown C3 -symmetric tricyclic triol both in racemic and enantiopure forms has been developed. Treatment of 7-tert-butoxynorbornadiene with peroxycarboxylic acids provided mixtures of C1 - and C3 -symmetric 3,5,7-triacyloxynortricyclenes via transannular π-cyclization and replacement of the tert-butoxy group. By refluxing in formic acid, the C1 -symmetric esters were converted to the C3 -symmetric formate. Hydrolysis gave diastereoisomeric triols, which were separated by recrystallization. Enantiomer resolution via diastereoisomeric tri(O-methylmandelates) delivered the target triols on a gram scale. The pure enantiomers are useful as core units of dopants for liquid crystals.
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Affiliation(s)
- Volodymyr Kozel
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | | | - Peer Kirsch
- Integrated Circuit Materials R&D Germany, Merck KGaA, Frankfurter Strasse 250, 64293, Darmstadt, Germany
| | - Günter Haufe
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
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33
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Kozel V, Daniliuc CG, Kirsch P, Haufe G. Das C
3
-symmetrische Tricyclo[2.2.1.02,6
]heptan-3,5,7-triol. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Volodymyr Kozel
- Organisch-Chemisches Institut; Universität Münster; Corrensstraße 40 48149 Münster Deutschland
| | | | - Peer Kirsch
- Integrated Circuit Materials R&D Germany; Merck KGaA; Frankfurter Straße 250 64293 Darmstadt Deutschland
| | - Günter Haufe
- Organisch-Chemisches Institut; Universität Münster; Corrensstraße 40 48149 Münster Deutschland
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34
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Horibe T, Ohmura S, Ishihara K. Selenium-Iodine Cooperative Catalyst for Chlorocyclization of Tryptamine Derivatives. Org Lett 2017; 19:5525-5528. [PMID: 28956932 DOI: 10.1021/acs.orglett.7b02613] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chlorocyclization of tryptamine derivatives has been developed with the use of a diphenyl diselenide-iodine cooperative catalyst. Various tryptamine derivatives can be smoothly converted to the corresponding C3a-chlorohexahydropyrrolo[2,3-b]indoles. Additionally, we demonstrate the formal total syntheses of (-)-psychotriasine and (-)-acetylardeemin by introducing nucleophiles to the C3a position of the products.
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Affiliation(s)
- Takahiro Horibe
- Graduate School of Engineering, Nagoya University , B2-3(611), Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Shuhei Ohmura
- Graduate School of Engineering, Nagoya University , B2-3(611), Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University , B2-3(611), Furo-cho, Chikusa, Nagoya 464-8603, Japan
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35
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Griffin JD, Cavanaugh CL, Nicewicz DA. Reversing the Regioselectivity of Halofunctionalization Reactions through Cooperative Photoredox and Copper Catalysis. Angew Chem Int Ed Engl 2017; 56:2097-2100. [PMID: 28105772 PMCID: PMC5512862 DOI: 10.1002/anie.201610722] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Indexed: 12/24/2022]
Abstract
Halofunctionalization of alkenes is a classical method for olefin difunctionalization. It gives rise to adducts which are found in many natural products and biologically active molecules, and offers a synthetic handle for further manipulation. Classically, this reaction is performed with an electrophilic halogen source and leads to regioselective formation of the halofunctionalized adducts. Herein, we demonstrate a reversal of the native regioselectivity for alkene halofunctionalization through the use of an acridinium photooxidant in conjunction with a copper cocatalyst.
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Affiliation(s)
- Jeremy D Griffin
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
| | - Cortney L Cavanaugh
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
| | - David A Nicewicz
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
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36
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Griffin JD, Cavanaugh CL, Nicewicz DA. Reversing the Regioselectivity of Halofunctionalization Reactions through Cooperative Photoredox and Copper Catalysis. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201610722] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jeremy D. Griffin
- Department of Chemistry; University of North Carolina at Chapel Hill; Chapel Hill NC 27599-3290 USA
| | - Cortney L. Cavanaugh
- Department of Chemistry; University of North Carolina at Chapel Hill; Chapel Hill NC 27599-3290 USA
| | - David A. Nicewicz
- Department of Chemistry; University of North Carolina at Chapel Hill; Chapel Hill NC 27599-3290 USA
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37
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Li J, Li Z, Zhang X, Xu B, Shi Y. Catalytic enantioselective bromohydroxylation of aryl olefins with flexible functionalities. Org Chem Front 2017. [DOI: 10.1039/c6qo00636a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly enantioselective bromohydroxylation of aryl olefins with flexible functionalities has been achieved with (DHQD)2PHAL as a catalyst and H2O as a nucleophile, giving a variety of optically active bromohydrins with up to 98% ee.
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Affiliation(s)
- Jing Li
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Zequan Li
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Xun Zhang
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Bing Xu
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Yian Shi
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
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38
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Denmark SE, Ryabchuk P, Burk MT, Gilbert BB. Toward Catalytic, Enantioselective Chlorolactonization of 1,2-Disubstituted Styrenyl Carboxylic Acids. J Org Chem 2016; 81:10411-10423. [PMID: 27555101 PMCID: PMC5100718 DOI: 10.1021/acs.joc.6b01455] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Indexed: 01/10/2023]
Abstract
An investigation into the use of Lewis base catalysis for the enantioselective chlorolactonization of 1,2-disubstituted alkenoic acids is described. Two mechanistically distinct reaction pathways for catalytic chlorolactonization have been identified. Mechanistic investigation revealed that tertiary amines predominately operate as Brønsted rather than Lewis bases. Two potential modes of activation have been identified that involve donation of electron density of the carboxylate to the C═C bond as well hydrogen bonding to the chlorinating agent. Sulfur- and selenium-based additives operate under Lewis base catalysis; however, due to the instability of the intermediate benzylic chloriranium ion, chlorolactonization suffers from low chemo-, diastereo-, and enantioselectivities. Independent generation of the benzylic chloriranium ion shows that it is in equilibrium with an open cation, which leads to low specificities in the nucleophilic capture of the intermediate.
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Affiliation(s)
| | - Pavel Ryabchuk
- Department
of Chemistry University of Illinois 600 South Mathews Avenue Urbana, Illinois 61801, United States
| | - Matthew T. Burk
- Department
of Chemistry University of Illinois 600 South Mathews Avenue Urbana, Illinois 61801, United States
| | - Bradley B. Gilbert
- Department
of Chemistry University of Illinois 600 South Mathews Avenue Urbana, Illinois 61801, United States
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39
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Gelat F, Coffinet M, Lebrun S, Agbossou-Niedercorn F, Michon C, Deniau E. Regioselective organocatalyzed asymmetric bromolactonization of aryl acrylate-type carboxylic acids: a new approach towards enantioenriched 3-substituted isobenzofuranones. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.tetasy.2016.07.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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40
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Han X, Zhou HB, Dong C. Applications of Chiral Squaramides: From Asymmetric Organocatalysis to Biologically Active Compounds. CHEM REC 2016; 16:897-906. [DOI: 10.1002/tcr.201500266] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Xin Han
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
| | - Hai-Bing Zhou
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
| | - Chune Dong
- State Key Laboratory of Virology; Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of Education Wuhan University School of Pharmaceutical Sciences; Wuhan 430071 P. R. China
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences; Shanghai 200032 P. R. China
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41
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Pan H, Huang H, Liu W, Tian H, Shi Y. Phosphine Oxide-Sc(OTf)3 Catalyzed Highly Regio- and Enantioselective Bromoaminocyclization of (E)-Cinnamyl Tosylcarbamates. An Approach to a Class of Synthetically Versatile Functionalized Molecules. Org Lett 2016; 18:896-9. [PMID: 26894481 DOI: 10.1021/acs.orglett.5b03459] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A highly regio- and enantioselective bromoaminocyclization of (E)-cinnamyl tosylcarbamates catalyzed by a chiral phosphine oxide-Sc(OTf)3 complex is described. A wide variety of optically active aryl 5-bromo-1,3-oxazinan-2-ones can be obtained with high yield and enantioselectivity.
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Affiliation(s)
- Hongjie Pan
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Hu Huang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Weigang Liu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Hua Tian
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Yian Shi
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.,Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523, United States
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42
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Tazeem T, Han X, Zhou Q, Wei J, Tien P, Yang G, Wu S, Dong C. A facile one-pot multi-component synthesis of novel adamantine substituted imidazo[1,2-a]pyridine derivatives: identification and structure–activity relationship study of their anti-HIV-1 activity. RSC Adv 2016. [DOI: 10.1039/c6ra17656a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
A series of adamantine substituted imidazo[1,2-a]pyridine derivatives were developed through a one-pot multi-component Groebke–Blackburn–Bienaymé reaction, among them several compounds were identified to be the potent inhibitors against HIV-1 cells.
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Affiliation(s)
- Tazeem Tazeem
- State Key Laboratory of Virology
- College of Life Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Xin Han
- State Key Laboratory of Virology
- College of Life Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Qingjun Zhou
- Hubei Collaborative Innovation Center for Advanced Organochemical Materials
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- Hubei University
- Wuhan 430062
- China
| | - Jingchen Wei
- Department of Pharmacology
- Guilin Medical University
- Guilin
- China
| | - Po Tien
- State Key Laboratory of Virology
- College of Life Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Guichun Yang
- Hubei Collaborative Innovation Center for Advanced Organochemical Materials
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- Hubei University
- Wuhan 430062
- China
| | - Shuwen Wu
- State Key Laboratory of Virology
- College of Life Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Chune Dong
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals
- Wuhan University School of Pharmaceutical Sciences
- Wuhan 430071
- China
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43
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Guo LN, Gu YR, Yang H, Hu J. Transition-metal free thiocyanooxygenation of functionalized alkenes: facile routes to SCN-containing dihydrofurans and lactones. Org Biomol Chem 2016; 14:3098-104. [DOI: 10.1039/c6ob00221h] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An efficient transition-metal free tandem cyclization of functionalized alkenes with thiocyanate salts has been developed under mild conditions. This protocol offers a simple, easy-to-handle, and atom-economical method for the synthesis of SCN-containing dihydrofurans and lactones with good to excellent yields.
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Affiliation(s)
- Li-Na Guo
- Department of Chemistry
- School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Yu-Rui Gu
- Department of Chemistry
- School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Hua Yang
- Department of Chemistry
- School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Jie Hu
- Xi'an Libang Pharmaceutical Co
- Ltd
- China
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44
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Li Z, Shi Y. Chiral Phosphine Oxide-Sc(OTf)3 Complex Catalyzed Enantioselective Bromoaminocyclization of 2-Benzofuranylmethyl N-Tosylcarbamates. Approach to a Novel Class of Optically Active Spiro Compounds. Org Lett 2015; 17:5752-5. [PMID: 26571147 DOI: 10.1021/acs.orglett.5b02817] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An efficient enantioselective bromoaminocyclization of 2-benzofuranylmethyl N-tosylcarbamates catalyzed by a chiral phosphine oxide-Sc(OTf)(3) complex is described. A wide variety of optically active spiro benzofuran oxazolidinones can be obtained with high enantioselectivities.
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Affiliation(s)
- Zequan Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Yian Shi
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.,State Key Laboratory of Coordination Chemistry, Center for Multimolecular Organic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China.,Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523, United States
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45
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Cheng YA, Yu WZ, Yeung YY. Carbamate-Catalyzed Enantioselective Bromolactamization. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504724] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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46
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Cheng YA, Yu WZ, Yeung YY. Carbamate-catalyzed enantioselective bromolactamization. Angew Chem Int Ed Engl 2015; 54:12102-6. [PMID: 26314397 DOI: 10.1002/anie.201504724] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 07/05/2015] [Indexed: 12/17/2022]
Abstract
A highly facile, efficient, and enantioselective bromolactamization of olefinic amides was effected by a carbamate catalyst and ethanol additive. The amide substrates underwent N-cyclization predominantly to give a diverse range of enantioenriched bromolactam products containing up to two stereogenic centers.
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Affiliation(s)
- Yi An Cheng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543 (Singapore)
| | - Wesley Zongrong Yu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543 (Singapore)
| | - Ying-Yeung Yeung
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543 (Singapore). .,Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong (China).
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47
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Liu W, Pan H, Tian H, Shi Y. Enantioselective 6-exo-Bromoaminocyclization of Homoallylic N-Tosylcarbamates Catalyzed by a Novel Monophosphine-Sc(OTf)3 Complex. Org Lett 2015; 17:3956-9. [PMID: 26186576 DOI: 10.1021/acs.orglett.5b01779] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A highly enantioselective 6-exo-bromoaminocyclization of (E)-homoallylic N-tosylcarbamates catalyzed by a novel monophosphine-Sc(OTf)3 complex is described, giving a wide variety of optically active oxazinanones with high enantioselectivities.
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Affiliation(s)
- Weigang Liu
- †Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hongjie Pan
- †Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hua Tian
- †Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yian Shi
- †Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,‡State Key Laboratory of Coordination Chemistry, Center for Multimolecular Organic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.,§Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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48
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Arcadi A, Fabrizi G, Goggiamani A, Marinelli F. Pd- and Rh-Catalyzed Hydroarylation of γ-(2-Methoxycarbonylphenyl)propargylic Alcohols: Approaches to 4- or 5-Substituted Seven-Membered Benzolactones and 3,3-Disubstituted Phthalides. J Org Chem 2015; 80:6986-95. [DOI: 10.1021/acs.joc.5b00663] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Antonio Arcadi
- Dipartimento
di Scienze Fisiche e Chimiche, Università di L’Aquila, Via Vetoio - 67010 Coppito (AQ), Italy
| | - Giancarlo Fabrizi
- Dipartimento
di Chimica e Tecnologie del Farmaco, Sapienza, Università di Roma, P.le A. Moro 5, 00185, Rome, Italy
| | - Antonella Goggiamani
- Dipartimento
di Chimica e Tecnologie del Farmaco, Sapienza, Università di Roma, P.le A. Moro 5, 00185, Rome, Italy
| | - Fabio Marinelli
- Dipartimento
di Scienze Fisiche e Chimiche, Università di L’Aquila, Via Vetoio - 67010 Coppito (AQ), Italy
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49
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Tang S, Wang ZY, Liu B, Dong CE. C2-symmetric BINOL-squaramide as efficient organocatalyst for the enantioselective α-amination of 1,3-dicarbonyl compounds with dialkyl azodicarboxylates. CHINESE CHEM LETT 2015. [DOI: 10.1016/j.cclet.2015.03.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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50
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Campbell ML, Rackley SA, Giambalvo LN, Whitehead DC. Vanadium (V) oxide mediated bromolactonization of alkenoic acids. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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