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Seki R, Nagai K, Kobayashi K, Shigeno S, Shirahata T, Kobayashi Y, Ohshiro T, Tomoda H. Celludinone C, a new dihydroisobenzofuran isolated from Talaromyces cellulolyticus BF-0307. J Antibiot (Tokyo) 2025; 78:26-34. [PMID: 39543335 DOI: 10.1038/s41429-024-00785-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2024] [Revised: 10/03/2024] [Accepted: 10/17/2024] [Indexed: 11/17/2024]
Abstract
Celludinones A and B, isolated from the fungus Talaromyces cellulolyticus BF-0307, were inhibitors of sterol O-acyltransferase (SOAT). Further searches for their congeners in the culture broth of the fungus by LC/UV and LC/MS analysis resulted in the discovery of four structurally related compounds, including a new dihydroisobenzofuran named celludinone C (1). The structure of 1, including its absolute stereochemistry, was elucidated by 1D/2D NMR and electronic circular dichroism (ECD) spectra. All of these compounds inhibited both SOAT1 and 2, with IC50 values ranging from 8.5 to 30 µM.
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Affiliation(s)
- Reiko Seki
- Medical Research Laboratories, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Kenichiro Nagai
- Medical Research Laboratories, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan.
| | - Keisuke Kobayashi
- Medical Research Laboratories, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
- Department of Microbial Chemistry, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Satoru Shigeno
- Medical Research Laboratories, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
- Department of Microbial Chemistry, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Tatsuya Shirahata
- Medical Research Laboratories, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
- Department of Pharmacognosy, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Yoshinori Kobayashi
- Medical Research Laboratories, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
- Department of Pharmacognosy, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Taichi Ohshiro
- Medical Research Laboratories, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan.
- Department of Microbial Chemistry, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan.
| | - Hiroshi Tomoda
- Medical Research Laboratories, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
- Department of Microbial Chemistry, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
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Aggarwal S, Srinivas D, Sreenivasulu C, Satyanarayana G. Nickel catalyzed intramolecular oxidative coupling: synthesis of 3-aryl benzofurans. RSC Adv 2020; 10:22264-22272. [PMID: 35516592 PMCID: PMC9054549 DOI: 10.1039/d0ra03071f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 05/27/2020] [Indexed: 11/21/2022] Open
Abstract
Recent research has been focused on the transition metal-catalyzed reactions. Herein we have developed nickel-catalyzed synthesis of 3-aryl benzofurans from ortho-alkenyl phenols via intramolecular dehydrogenative coupling. Notably, simple O2 gas served as an oxidant, without using any sacrificial hydrogen acceptor. The strategy enabled the synthesis of 3-aryl benzofurans in good to excellent yields.
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Affiliation(s)
- Sakshi Aggarwal
- Department of Chemistry, Indian Institute of Technology Kandi, Sangareddy Hyderabad 502 285 Telangana India +91 40 2301 6003/32 +91 40 2301 6033
| | - Dasari Srinivas
- Department of Chemistry, Indian Institute of Technology Kandi, Sangareddy Hyderabad 502 285 Telangana India +91 40 2301 6003/32 +91 40 2301 6033
| | - Chinnabattigalla Sreenivasulu
- Department of Chemistry, Indian Institute of Technology Kandi, Sangareddy Hyderabad 502 285 Telangana India +91 40 2301 6003/32 +91 40 2301 6033
| | - Gedu Satyanarayana
- Department of Chemistry, Indian Institute of Technology Kandi, Sangareddy Hyderabad 502 285 Telangana India +91 40 2301 6003/32 +91 40 2301 6033
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