Dipolar cyclization reactions in heterocyclic synthesis: a novel route to furanophanes
作者:Wolfgang Eberbach、Norbert Laber
DOI:10.1016/s0040-4039(00)77672-6
日期:1992.1
The multistep transformation of 2,3-bridged butenynyl oxiranes 8 into furanophanes 12 involving bridgehead olefins 11 as key intermediates is described. The two lower members of 12 undergo rapid air oxidation resulting in the formation of the dienediones 14a,b. 14b is converted by base into the bicyclo[6.3.0]undecadienone 15.
描述了将2,3-桥连的丁炔基环氧乙烷8经多步转化为呋喃并烷12,其涉及桥头烯烃11作为关键中间体。12的两个下部构件经历快速的空气氧化,从而导致二叉二酮14a,b的形成。14b被碱基转化为双环[6.3.0] undecadienone 15。