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Guo Q, Lai Z, Tian Z, Tang R, Ding T, Jiang X. Organocatalytic Enantioselective Chloroiminocyclization for the Synthesis of Imidazoline. Org Lett 2024; 26:5592-5596. [PMID: 38914478 DOI: 10.1021/acs.orglett.4c02057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Imidazoline is an important scaffold in organic synthesis and a pharmacophore in medicinal chemistry. We apply basic imines as nucleophiles for the catalytic asymmetric chloroiminocyclization to furnish tetrasubstituted stereocenter-containing imidazolines in excellent yields and enantioselectivities. The reaction can be conducted in the polar solvent acetonitrile under concentrated reaction conditions.
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Affiliation(s)
- Qifeng Guo
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, and International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), Jinan University College of Pharmacy, Guangzhou 510632, China
| | - Zhitao Lai
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, and International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), Jinan University College of Pharmacy, Guangzhou 510632, China
| | - Zeng Tian
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, and International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), Jinan University College of Pharmacy, Guangzhou 510632, China
| | - Ran Tang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, and International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), Jinan University College of Pharmacy, Guangzhou 510632, China
| | - Tengbo Ding
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, and International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), Jinan University College of Pharmacy, Guangzhou 510632, China
| | - Xiaojian Jiang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, and International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), Jinan University College of Pharmacy, Guangzhou 510632, China
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Tsuji Y, Kon K, Horibe T, Ishihara K. Catalytic Site-, Diastereo-, and Enantioselective Cascade Iodocyclization of 2-Geranylarenols. Chem Asian J 2023; 18:e202300019. [PMID: 36745467 DOI: 10.1002/asia.202300019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/07/2023]
Abstract
A chiral amidophosphate-N-iodosuccinimide cooperative catalysis has been developed for the site-, diastereo-, and enantioselective iodocyclization of 2-geranylarenols with molecular iodine to give the corresponding iodo-containing polycyclic compounds with good levels of selectivity. This is the first example of a catalytic enantioselective iodocarbocyclization. A reactive chiral iodonium species is generated from molecular iodine via the dual halogen-bonding interactions with a chiral Lewis base and Lewis acid. The sterically demanding 3,3'-substituents of the chiral BINOL-derived amidophosphate are critical to induce the site-selective iodination at the less-hindered terminal alkenyl moiety of 2-geranylarenols.
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Affiliation(s)
- Yasutaka Tsuji
- Graduate School of Engineering, Nagoya University B2-3(611), Furo-cho, Chikusa, Nagoya, 464-8603, Japan
| | - Kazumasa Kon
- Graduate School of Engineering, Nagoya University B2-3(611), Furo-cho, Chikusa, Nagoya, 464-8603, Japan.,Venture Business Laboratory, Nagoya University B2-4, Furo-cho, Chikusa, Nagoya, 464-814, Japan
| | - Takahiro Horibe
- 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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3
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Cross-assembly confined bifunctional catalysis via non-covalent interactions for asymmetric halogenation. Chem 2023. [DOI: 10.1016/j.chempr.2023.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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4
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Suzuki TK, Yamanaka M, Arai T. Intermolecular Catalytic Asymmetric Iodoetherification of Unfunctionalized Alkenes. Org Lett 2022; 24:3872-3877. [PMID: 35604948 DOI: 10.1021/acs.orglett.2c01490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A newly prepared trinuclear Zn3-(R,S,S)-aminoiminobinaphthoxide complex (triZn-II) catalyzed the first general intermolecular asymmetric iodoetherification of unfunctionalized alkenes. Using triZn-II, the iodoetherification reaction of unfunctionalized alkenes with o-nitrophenols proceeded smoothly to give the products with up to 92.5:7.5 er, and diene substrates were converted to the products with up to 99:1 er with the formation of a meso-isomer (dl/meso = 78/22). The chiral iodoethers gave a new platform for the synthesis of chiral morpholines.
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Affiliation(s)
- Takumi K Suzuki
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Resource Innovation Center (CIRIC), Molecular Chirality Research Center (MCRC), Synthetic Organic Chemistry, Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Masahiro Yamanaka
- Department of Chemistry, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Takayoshi Arai
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Resource Innovation Center (CIRIC), Molecular Chirality Research Center (MCRC), Synthetic Organic Chemistry, Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
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Zhong H, Ding T, Guo Q, Tian Z, Yu P, Jiang X. Accessing Chiral 2,2-Disubstituted Morpholines via Organocatalytic Enantioselective Chlorocycloetherification. Org Chem Front 2022. [DOI: 10.1039/d2qo00390b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral morpholine is an important scaffold in organic synthesis and a pharmacophore in medicinal chemistry. However, catalytic enantioselective procedure for the construction of morpholine remains sparse. We report herein a...
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Han C, Feng X, Du H. Asymmetric Halocyclizations of 2-Vinylbenzyl Alcohols with Chiral FLPs. Org Lett 2021; 23:7325-7329. [PMID: 34505791 DOI: 10.1021/acs.orglett.1c02361] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
By the use of a chiral frustrated Lewis pair (FLP) consisting of a chiral-diene-derived borane and tBu3P as the catalyst, an asymmetric halocyclization of 2-vinylbenzyl alcohols with NBS or NIS was successfully realized. A variety of optically active 1,3-dihydroisobenofuran derivatives were obtained in high yields with up to 87% ee and could be conveniently converted to other useful chiral compounds.
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Affiliation(s)
- Caifang Han
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiangqing Feng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haifeng Du
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
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