Non-enzymatic synthesis of <i>C</i>-methylated fluostatins: discovery and reaction mechanism
作者:Bidhan Chandra De、Chunfang Yang、Chunshuai Huang、Changsheng Zhang、Wenjun Zhang
DOI:10.1039/d3ob01920a
日期:——
Two C-methylated fluostatins (FSTs) B3 (1) and B4 (2) were synthesized from flavin-mediated nonenzymatic epoxide ring-opening reactions of FST C. The structures of 1 and 2 were elucidated by HRESIMS, NMR, and ECD spectroscopic analyses. A subsequent 13C labeling study demonstrated that the C-methyl groups of 1 and 2 were derived from DMSO and enabled the mechanistic proposal of a nonenzymatic C-methylation
两种 C 甲基化氟他汀 (FST) B3 (1) 和 B4 (2) 是由黄素介导的 FST C 的非酶环氧化物开环反应合成的。通过 HRESIMS、NMR 和 ECD 波谱分析阐明 1 和 2 的结构。随后的 13C 标记研究表明,1 和 2 的 C 甲基来源于 DMSO,并实现了非酶 C 甲基化的机制提出。