thermal reaction of 1,4-bisallenes with the aid of Cu salt/amine significantly suppressed the formal [3,3] sigmatropic rearrangement resulting in the highly selective formation of the bicyclo[4.2.0]octadiene framework. This reaction could be applied to the one-pot synthesis of bicyclo[4.2.0]octadienes from 1,5-hexadiynes via the Crabbé homologation.
1,4-双烯
丙烯与
铜盐/胺的热反应显着抑制了形式上的[3,3]σ重排,从而导致了双环[4.2.0]
辛二烯骨架的高度选择性形成。该反应可用于通过Crabbé同源性由
1,5-己二炔一锅法合成双环[4.2.0]
辛二烯。