A mild and selective synthesis of cyclopropene and cyclopropane derivatives via cycliallylation of alkenyllithiums
作者:A.Timothy Stoll、Ei-ichi Negishi
DOI:10.1016/s0040-4039(01)80915-1
日期:1985.1
Treatment of cis-1-iodo-3-chloro-1-propene derivatives, readily obtainable via trans addition of organometals to propargyl alcohols followed by iodinolysis and chlorination, with alkyllithiums, such as t-BuLi and n-BuLi, can proceed rapidly and cleanly even at −78°C to give in high yields cyclopropene derivatives, which undergo cis hydrometalation and carbometalation reactions more rapidly than the