First Enantioselective Syntheses of (+)- and (−)-Wilforonide by Using Chiral Auxiliaries Derived from the Same Chiral Source
作者:Dan Yang、Ming Xu
DOI:10.1021/ol015722p
日期:2001.6.1
[see structure]. The first enantioselective syntheses of both (+)-wilforonide (>98% ee) and (-)-wilforonide (>98% ee) have been accomplished by employing chiral auxiliaries derived from the same chiral source, (R)-pulegone. The bicyclic skeleton of wilforonide was constructed by using Mn(III)-based oxidative radical cyclization reactions of chiral beta-keto esters. The absolute configuration of natural
[请参阅结构]。通过使用衍生自相同手性来源(R)-普勒高酮的手性助剂,完成了(+)-野生型(> 98%ee)和(-)-野生型(> 98%ee)的第一个对映选择性合成。wilforonide的双环骨架是通过使用基于Mn(III)的手性β-酮酸酯的氧化自由基环化反应构建的。天然维福宁的绝对构型已确定为(5aR,9aR)。