Vinylogous anionic processes in the formation and interconversion of tetracyclic ring systems
作者:Paul D. Thornton、T. Stanley Cameron、D. Jean Burnell
DOI:10.1039/c0ob01152e
日期:——
Tandem oxy-Cope and transannular vinylogous aldol reactions and/or vinylogous retro-aldol, conjugate addition, and transannular vinylogous aldol reactions transformed some tricyclic vinyl enones into fused tetracycles under basic conditions. Mesylates derived from similar tetracyclic products underwent efficient skeletal reorganization via transannular ring-opening but then different modes of transannular
在碱性条件下,串联氧-Cope和跨环乙烯基羟醛反应和/或乙烯基逆向羟醛,共轭加成和跨环乙烯基羟醛反应将一些三环乙烯基烯酮转化为稠合的四环。衍生自相似四环产物的甲磺酸酯经过环戊环开环进行了有效的骨架重组,但是在用叔丁醇盐处理后,环戊环闭环的模式不同。