Mannich bases react thermally with ketones to give 1,5-diketones by what appears to be a Michael reaction. In some cases the orientation of the product differs significantly from that observed in the Michael reaction, and Mannich bases lacking a hydrogen β to the N atom are able to react via an intermediate migration.
曼尼希碱与
酮发生热反应,通过看似迈克尔反应的方式生成1,5-二
酮。在某些情况下,产物的取向与迈克尔反应中观察到的显着不同,并且在N原子上缺少
氢β的曼尼希碱能够通过中间迁移反应。