Stereoselective construction of 3-trifluoromethyl conjugated dienoates, trienoates or dienynoates was achieved from ethyl (Z)-4,4,4-trifluoro-3-iodobutenoate and alkenyltin or alkynyltin reagents through the Stille reaction or under HeckâSonogashira coupling conditions. Reduction of ethyl 3-trifluoromethyldienoates using DIBAL-H selectively yielded allylic alcohols and hydrolysis with lithium hydroxide yielded the corresponding acids.
通过Stille反应或Heck-Sonogashira偶联条件,从乙基(Z)-4,4,4-三
氟-3-
碘丁烯酸酯和烯基
锡或炔基
锡试剂,成功实现了3-三
氟甲基共轭二烯酸酯、
三烯酸酯或二烯炔酸酯的立体选择性构建。使用D
IBAL-H还原乙基3-三
氟甲基二烯酸酯可选择性地得到烯丙基醇,而用
氢氧化锂水解则得到相应的酸。