Total syntheses of the cyclopentane sesquiterpenes of the title using an epoxynitrile anion cyclization reaction as key step, are described. The preferential formation of the cyclopentane ring from a terminal disubstituted 5-epoxynitrile (e.g. 2b) had not previously been observed. The 2-aryl substituent is reasonably assumed to be responsible for this divergence.
描述了以环氧腈阴离子环化反应为关键步骤的总合成方法,合成了题目中的
环戊烯倍半萜。来自末端双取代的5-环氧腈(例如2b)形成
环戊烯环的优先性以前尚未观察到。可以合理地认为2-芳基取代基是导致这种分歧的原因。