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Imaizumi T, Yamashita Y, Nakazawa Y, Okano K, Sakata J, Tokuyama H. Total Synthesis of (+)-CC-1065 Utilizing Ring Expansion Reaction of Benzocyclobutenone Oxime Sulfonate. Org Lett 2019; 21:6185-6189. [PMID: 31188001 DOI: 10.1021/acs.orglett.9b01690] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An indole synthesis via ring expansion of benzocyclobutenone oxime sulfonate was developed. Utility of the indole synthesis was demonstrated by the total synthesis of (+)-CC-1065. The middle and right segments were constructed by a sequential ring expansion of the symmetrical benzo-bis-cyclobutenone. The left segment was also constructed via ring expansion of the methyl-substituted benzocyclobutenone oxime sulfonates. After condensation of these three segments, the dienone cyclopropane structure was formed to complete the total synthesis.
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Affiliation(s)
- Taku Imaizumi
- Graduate School of Pharmaceutical Sciences , Tohoku University , Aoba 6-3, Aramaki , Aoba-ku, Sendai 980-8578 , Japan
| | - Yumi Yamashita
- Graduate School of Pharmaceutical Sciences , Tohoku University , Aoba 6-3, Aramaki , Aoba-ku, Sendai 980-8578 , Japan
| | - Yuki Nakazawa
- Graduate School of Pharmaceutical Sciences , Tohoku University , Aoba 6-3, Aramaki , Aoba-ku, Sendai 980-8578 , Japan
| | - Kentaro Okano
- Graduate School of Pharmaceutical Sciences , Tohoku University , Aoba 6-3, Aramaki , Aoba-ku, Sendai 980-8578 , Japan
| | - Juri Sakata
- Graduate School of Pharmaceutical Sciences , Tohoku University , Aoba 6-3, Aramaki , Aoba-ku, Sendai 980-8578 , Japan
| | - Hidetoshi Tokuyama
- Graduate School of Pharmaceutical Sciences , Tohoku University , Aoba 6-3, Aramaki , Aoba-ku, Sendai 980-8578 , Japan
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2
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Nishida Y, Takeda N, Matsuno K, Miyata O, Ueda M. Acylative Coupling of Amine and Indole Using Chloroform as a Carbonyl Group. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800571] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yuika Nishida
- Kobe Pharmaceutical University; Motoyamakita, Higashinada 658-8558 Kobe Japan
| | - Norihiko Takeda
- Kobe Pharmaceutical University; Motoyamakita, Higashinada 658-8558 Kobe Japan
| | - Kenji Matsuno
- Department of Chemistry and Life Science; Kogakuin University; Nakano, Hachi-oji 192-0015 Tokyo Japan
| | - Okiko Miyata
- Kobe Pharmaceutical University; Motoyamakita, Higashinada 658-8558 Kobe Japan
| | - Masafumi Ueda
- Kobe Pharmaceutical University; Motoyamakita, Higashinada 658-8558 Kobe Japan
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3
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Doi N, Takeda N, Miyata O, Ueda M. Regiodivergent Chlorine-Atom-Transfer Ring-Opening Reactions of Trichloromethylcyclopropanes. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700567] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nobuyoshi Doi
- Kobe Pharmaceutical University; Motoyamakita; Higashinada; 658-8558 Kobe Japan
| | - Norihiko Takeda
- Kobe Pharmaceutical University; Motoyamakita; Higashinada; 658-8558 Kobe Japan
| | - Okiko Miyata
- Kobe Pharmaceutical University; Motoyamakita; Higashinada; 658-8558 Kobe Japan
| | - Masafumi Ueda
- Kobe Pharmaceutical University; Motoyamakita; Higashinada; 658-8558 Kobe Japan
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Sun B, Gao L, Shen S, Yu C, Li T, Xie Y, Yao C. NHC-catalyzed [4 + 2] annulation of 2-bromo-2-enals with acylhydrazones: enantioselective synthesis of δ-lactams. Org Biomol Chem 2017; 15:991-997. [DOI: 10.1039/c6ob02253g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
An asymmetric assembly of δ-lactams was realized via the NHC-catalyzed formal [4 + 2] annulation of acylhydrazones and 2-bromo-2-enals bearing γ-H.
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Affiliation(s)
- Baomin Sun
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Lijiu Gao
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Shide Shen
- Xuzhou Institute of Architectural Technology
- Xuzhou
- China
| | - Chenxia Yu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Tuanjie Li
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Yuanwei Xie
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Changsheng Yao
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
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