Method for the preparation of O-carboxyarylimindazolinones.

摘要

A method for the preparation of o-carboxyl imidazolinone compounds of formula (I) <CHEM> wherein A is CH or N; R1 is H or C1-C12 alkyl; R2 is H or C1-C6 alkyl; R3 is H, C1-C6 alkyl, or when R2 and R3 are taken together they may form a ring represented by -CH=C-CH=CH-; including oxidizing the appropriate 2-{[(1-carbamoyl-1,2-dimethylpropyl)amino]methyl}-benzoic acid intermediate with a brominating agent. Compounds useful as intermediates in the oxidation method and methods for preparing them are disclosed.