Treatment of aryl bromides with homoallyl alcohols bearing a trimethylene group at the allylic position in the presence of cesium carbonate under palladium catalysis affords (2-arylethylidene)cyclobutanes selectively. The selective formation of the alkylidenecyclobutane skeleton results from regiospecific retro-allylation of the homoallyl alcohols, which accompanies the transposition of the double bonds.
在
钯催化剂和
碳酸铯存在下,芳基
溴与带有三元环基的同烯丙基醇在烯丙位反应,可以选择性地得到(2-芳基乙叉基)
环丁烷。这种选择性的烷叉
环丁烷骨架的形成源于同烯丙基醇的区域选择性逆烯丙基化反应,该反应伴随着双键的转移。