申请人:Sun Chemical Corporation
公开号:US06388093B1
公开(公告)日:2002-05-14
A synthesis for preparing asymmetrical 1,4-diketopyrrolo[3,4-c]pyrroles involving: (a) reacting a &bgr;-ketoamide with a strong base; (b) halogenating the same or a different &bgr;-ketoamide; (c) reacting the reaction products of step (a) and (b) to form a succinamide; and (d) heating the succinamide in the presence of a Lewis Acid. Symmetrical 1,4-diketopyrrolo [3,4-c]pyrroles are synthesized by oxidatively dimerizing the reaction product of step (b) to form a succinamide; and heating the succinamide in the presence of a Lewis Acid.
一种制备不对称1,4-二酮吡咯[3,4-c]吡咯的合成方法,包括:(a)用强碱反应β-酮酰胺;(b)卤代相同或不同的β-酮酰胺;(c)将步骤(a)和(b)的反应产物反应形成琥珀酰胺;(d)在路易斯酸存在下加热琥珀酰胺。通过氧化二聚步骤(b)的反应产物形成琥珀酰胺,并在路易斯酸存在下加热琥珀酰胺,可以合成对称1,4-二酮吡咯[3,4-c]吡咯。