作者:Bowen Fang、Huaiji Zheng、Changgui Zhao、Peng Jing、Huilin Li、Xingang Xie、Xuegong She
DOI:10.1021/jo301533f
日期:2012.9.21
A concise synthesis of the tetracyclic core (ABCE rings) of daphenylline has been accomplished involving a benzobicyclo[3.3.1] lactam as the key intermediate. This bridged bicyclic intermediate was efficiently constructed via a Brønsted acid promoted intramolecular Friedel–Crafts type Michael addition of a δ-benzyl α,β-unsaturated δ-lactam.
已经完成了以苯并双环[3.3.1]内酰胺为主要中间体的联苯四环核(ABCE环)的简明合成。该桥联的双环中间体是通过布朗斯台德酸促进的分子内Friedel–Crafts型Michael加成δ-苄基α,β-不饱和δ-内酰胺而有效构建的。