Sodium Hydroxide → 2-{2,6-Dichloro-3-[(2,2-dimethyl-propionylamino)-methyl]-phenylamino}-6-[3,3-difluoro-pyrrolidinyl]-1-methyl-1H-benzimidazole-5-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-{2,6-dichloro-3-[(2,2-dimethyl-propionylamino)-methyl]-phenylamino}-6-[3,3-difluoro-pyrrolidinyl]-1-methyl-1H-benzimidazole-5-carboxylic acid methyl ester (2.37 g, 4.17 mmol), 2 N NaOH-solution (9.8 ml) and EtOH (20 ml) is stirred for 1 h at rt and for 2 h at 50° C. and concentrated. Water is added and it is filtered. The filtrate is acidified with 4N HCl (pH 5) and the precipitate is filtered, washed with water and dried.

Provenance & Evidence