Preparation of N-acyl amino carboxylic acids, amino carboxylic acids and their derivatives by metal-catalyzed carboxymethylation in the presence of a promoter
申请人:——
公开号:US20020058834A1
公开(公告)日:2002-05-16
A process for the preparation of amino carboxylic acids, N-acyl amino carboxylic acids, or derivatives thereof by carboxymethylation of an amide, amide precursor or amide source compound in the presence of a carboxymethylation catalyst precursor and a promoter is provided. A carboxymethylation reaction mixture is formed by introducing a promoter, an amide, amide precursor or amide source compound, carbon monoxide, hydrogen, an aldehyde or aldehyde source compound, and a carboxymethylation catalyst precursor into a carboxymethylation reaction zone. In a preferred embodiment, the promoter is a supported noble metal promoter. In another preferred embodiment, the amide compound and aldehyde are selected to yield an N-acyl amino carboxylic acid which is readily converted to N-phosphonomethyl)glycine, or a salt or ester thereof.
提供了一种通过在存在羧甲基化催化剂前体和促进剂的情况下,通过羧甲基化酰胺、酰胺前体或酰胺源化合物的羧甲基化制备氨基羧酸、N-酰基氨基羧酸或其衍生物的方法。通过将促进剂、酰胺、酰胺前体或酰胺源化合物、一氧化碳、氢气、醛或醛源化合物以及羧甲基化催化剂前体引入羧甲基化反应区域形成羧甲基化反应混合物。在一种首选实施例中,促进剂是支持的贵金属促进剂。在另一种首选实施例中,所选的酰胺化合物和醛可产生一种易于转化为N-磷酸甲基)甘氨酸或其盐或酯的N-酰基氨基羧酸。