作者:Takafumi Hirokawa、Shigefumi Kuwahara
DOI:10.1002/ejoc.201300257
日期:2013.5
The first enantioselective synthesis of hushinone, a tricyclic norsesquiterpenoid with an unprecedented carbon framework identified from the essential oils of birch trees, was accomplished by using intramolecular halolactone alkylation as the key step. Two other bicyclic norsesquiterpenoids in the essential oils, birkenol and birkenal, which share the same carbon skeleton as hushinone, were also synthesized
通过使用分子内卤内酯烷基化作为关键步骤,首次对映选择性合成胡参酮,一种从桦树精油中鉴定出的具有前所未有的碳骨架的三环去甲倍半萜类化合物。精油中的另外两种双环去甲倍半萜类化合物,birkenol 和 birkenal,与hushinone 具有相同的碳骨架,也是通过消除hushinone 的内酯开环首次合成的。合成和天然产物之间比旋光度数据的比较导致对天然产物的绝对构型的确认。