Method for the preparation of o-carboxyarylimidazolinones

Details Method for the preparation of o-carboxyarylimidazolinones Method for the preparation of o-carboxyarylimidazolinones

C - Chemistry, Metallurgy

07

D

260/280, 260/289

C07D 233/70 (2006.01) C07C 237/06 (2006.01) C07D 213/80 (2006.01) C07D 213/803 (2006.01) C07D 215/48 (2006.01) C07D 401/04 (2006.01)

Patent

CA 1338248

A method for the preparation of o-carboxyl imidazolinone compounds of formula (I) Image [I] 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.

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