The syntheses of 6β,7β, 8α, and 6β, 7β, 8β-trihydroxy labdadienes, 2a and 2b respectively, were performed starting from the decalin 3, in order to determine the exact structure of compounds, isolated from plant sources, for which configuration at C-8 was not clearly demonstrated. As a result, the structure 2a was established with certainty for crotomachlin, a diterpine from Croton macrostachys.
从十氢化
萘3开始分别进行6β,7β,8α和6β,7β,8β-三羟基拉达二烯2a和2b的合成,以确定从植物来源分离的化合物的确切结构在C-8上没有清楚地展示出来。结果,确定地建立了克罗托马克林(crotomachlin)的结构2a,克罗托马克林是来自
巴豆大
水杨酸的二萜。