| abstract |
Prodn. of amidine carboxylic acid salts R1-C(=NR2)-NHR2.R3-COOH (I) comprises reacting a trimethyl orthocarboxylate R1-C(OCH3)3 (II), after reaction with or in the presence of an alcohol contg. more than 2C (III), with ammonia or a prim. amine NHR12 (IV) and a carboxylic acid and/or carboxylic acid ammonium salt R3-COOH (V). R1, R3 = H or 1-6C alkyl; R2 = H, alkyl, cycloalkyl, aryl or aralkyl. |