PROCEDIMIENTO PARA LA OBTENCION DE ACIDO (1-(4-CLOROBENZOIL)-5-METOXI-2-METIL-3-INDOL)ACETOXIACETICO

摘要

The invention relates to a process for the production of 1-(4-chlorobenzoyl)-5-methoxy-2-methyl-3-indolylacetoxyacetic acid (known to be useful as an antiphlogistic agent) which comprises reacting alpha -(4-chlorobenzoyl)-4-methoxyphenylhydrazine hydrochloride or sulphonate with laevulinoyloxyacetic acid and cyclizing the resulting hydrazone to obtain a product free from 1-benzoyl-5-methoxy-2-methyl-3-indolylacetoxyacetic acid.