An intramolecular ketene aza-Claisen rearrangement is developed for the first time to enable the stereoselective synthesis of α-ally-α-cyano-lactams from N-allyl amino esters. This reaction also exhibits outstanding chemoselectivity when an unsymmetrical bis-N-allyl group is present in the starting molecule. The usefulness of this method is demonstrated by a short synthesis of optically active bicyclolactam
首次开发了分子内的烯酮氮杂-克莱森重排,以使得能够从N-烯丙基
氨基酯立体选择性地合成α-烯丙基-α-
氰基-内酰胺。当起始分子中存在不对称的双-N-烯丙基基团时,该反应还表现出优异的
化学选择性。由1-脯
氨酸短暂合成旋光性双环内酰胺证明了该方法的有效性。