Ring-opening allylation of semicyclic N,O-acetals with allylic silanes is effectively catalyzed by a Lewis acid showing high diastereoselectivities. The synthetic utility of this method has been demonstrated in a stereoselective synthesis of an antimalarial agent, isofebrifugine.
半环状N,O-
缩醛与烯丙基
硅烷的环开环烯丙基化反应可由
路易斯酸高效催化,表现出高度的立体选择性。该方法的合成实用性已在抗疟疾药物异
黄连素(isofebrifugine)的立体选择性合成中得到验证。