Enantioselective Total Synthesis of (+)-Stachyflin: A Potential Anti-Influenza A Virus Agent Isolated from a Microorganism
作者:Junji Sakurai、Takuya Kikuchi、Ohgi Takahashi、Kazuhiro Watanabe、Tadashi Katoh
DOI:10.1002/ejoc.201100173
日期:2011.6
O-induced cascade epoxide-opening/rearrangement/cyclization reaction to stereoselectively construct the requisite pentacyclic ring system in one step. In order to rationalize the mechanism of the cascade reaction, quantum chemical calculations of the possible intermediary carbocations and transition states in the model synthesis were carried out. An alternative approach to synthesize (+)-stachyflin by
从 (+)-5-甲基-维兰德-米歇尔酮开始,以对映选择性方式有效合成了一种新型且有效的血凝素抑制剂 (+)-stachyflin。该合成方法采用BF 3 ·Et 2 O诱导的级联环氧化物开环/重排/环化反应一步立体选择性地构建所需的五环体系。为了使级联反应的机理合理化,对模型合成中可能的中间碳正离子和过渡态进行了量子化学计算。还描述了通过采用类似的级联反应合成 (+)-stachyflin 的替代方法。