申请人:Lonza AG
公开号:US05583226A1
公开(公告)日:1996-12-10
A novel pyrimidine derivative, N-(2-amino-4,6-dichloropyrimidine-5-yl)formamide for use, e.g., in the production of antiviral nucleotide derivatives, can be made by a process involving cyclyzing an aminomalonic ester with guanidine or its salt in the presence of a base to produce 2,5-diamino-4,6-dihydroxypyrimidine or its salt, chlorinating this product with a chlorinating agent in the presence of an amide to produce 4,6-dichloropyrimidine, and reacting the 4,6-dichlororpyrimidine with an aqueous solution of a carboxylic acid to produce the N-(2-amino-4,6-dichloropyrimidine-5-yl)formammide. Novel also are 4,6-dichloropyrimidine, 4,6-dichloro-N'-(dimethylaminomethylene)pyrimidine-2,5-diamine, 4,6-dichloro-N'-(piperidine-1-ylmethylene)pyrimidine-2,5-diamine, and a process for making 2,5-diamino-4,6-dichloropyrimidine.
一种新的嘧啶衍生物N-(2-氨基-4,6-二氯嘧啶-5-基)甲酰胺,可用于制备抗病毒核苷衍生物,其制备过程包括在碱存在下,使氨基丙二酸酯与胍或其盐环化,生成2,5-二氨基-4,6-二羟基嘧啶或其盐,使用氯代试剂在酰胺存在下氯化该产物,生成4,6-二氯嘧啶,然后将4,6-二氯嘧啶与羧酸的水溶液反应,生成N-(2-氨基-4,6-二氯嘧啶-5-基)甲酰胺。此外,还涉及4,6-二氯嘧啶、4,6-二氯-N'-(二甲基氨基甲烯基)嘧啶-2,5-二胺、4,6-二氯-N'-(哌啶-1-基甲烯基)嘧啶-2,5-二胺和制备2,5-二氨基-4,6-二氯嘧啶的方法。