Synthesis of Antimitotic Analogs of the Microtubule Stabilizing Sponge Alkaloid Ceratamine A
作者:Matt Nodwell、Jenna L. Riffell、Michel Roberge、Raymond J. Andersen
DOI:10.1021/ol7030284
日期:2008.3.1
Antimitotic analogs of the microtubule stabilizing sponge alkaloid ceratamine A (1) have been synthesized starting from tribromoimidazole. A key step in the synthesis is the formation of the azepine ring via an intramolecular Buchwald coupling between a vinyl bromide and a N-methyl amide. This represents the first synthesis of a fully unsaturated imidazo[4,5,d]azepine. NMR data obtained for the synthetic
从三溴咪唑开始合成了微管稳定海绵生物碱ceratamine A(1)的抗有丝分裂类似物。合成中的关键步骤是通过乙烯基溴化物和N-甲基酰胺之间的分子内布赫瓦尔德偶联形成氮杂环。这代表了完全不饱和咪唑并[4,5,d]氮杂的首次合成。从合成的ceratamine类似物获得的NMR数据为归属于天然产物的结构提供了支持。