[reaction: see text] The use of anionic polycyclization (AP) in constructing the steroidal backbone of cardenolides was investigated. The reaction of 2-carbomethoxy-2-cyclohexenone I with the enolate of Nazarov reagent II gave, after decarboxylation and aldol condensation, steroid III with control of stereochemistry.
[反应:见正文]研究了阴离子多环化(AP)在构建烯醇
内酯类固醇骨架中的应用。2-羧甲氧基-2-
环己烯酮Ⅰ与纳扎罗夫试剂Ⅱ的烯醇化物反应,在脱羧和醛醇缩合后,在立体
化学控制下得到甾族化合物Ⅲ。