Preparing beta-aminopropionic acid derivative, useful as hardener, comprises reacting amine with acrylic acid to give beta-aminopropionic acid and unreacted acrylic acid derivative; and reacting obtained acid derivative with amine

摘要

Preparation of beta -aminopropionic acid derivatives by reacting primary/secondary amine with an acrylic acid derivative, comprises reacting first primary or secondary amine with acrylic acid derivative to obtain a first beta -aminopropionic acid derivative and unreacted acrylic acid derivative; and completely reacting the unreacted acrylic acid derivative with a second secondary amine to obtain a second beta -aminopropionic acid derivative, where the reaction mixture contains beta -aminopropionic acid derivative and unreacted secondary amine. Preparation of beta -aminopropionic acid derivatives by reacting a primary/ secondary amine with an acrylic acid derivative, comprises reacting first primary or secondary amine as value amine with acrylic acid derivative to obtain reaction mixture containing a first beta -aminopropionic acid derivative as an end product in addition with unreacted acrylic acid derivative, where the amount of the acrylic acid derivative is large, when compared with the value amine; and completely reacting the unreacted acrylic acid derivative with a second secondary amine as a trapping amine to obtain a second beta -aminopropionic acid derivative, where the reaction mixture contains first beta -aminoproionic acid derivative as end product, second beta -aminopropionic acid derivative and unreacted secondary amine.