[EN] A METHOD FOR PREPRATION OF CHLORPHENIRAMINE MALEATE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE MALÉATE DE CHLORPHÉNIRAMINE
申请人:[en]SUPRIYA LIFESCIENCE LTD.
公开号:WO2022229684A1
公开(公告)日:2022-11-03
A process for preparing a chlorpheniramine maleate, comprising addition of a predetermined amount of an isopropyl alcohol and a maleic acid to obtain a mixture, heating the isopropyl alcohol and the maleic acid mixture at a predetermined temperature, adding the isopropyl alcohol and the maleic acid mixture to a (4-chlorophenyl)-N, N-dimethyl-3-pyridin-2-ylpropan-1-amine prepared by a predetermined process to obtain a reaction mass, heating the reaction mass at a temperature in the range of 60°C to 65°C for a predetermined period of time to isolate the product, cooling the isolated product at a temperature in the range of 10°C to 15°C and filtering and drying the isolated product to obtain a pure chlorpheniramine maleate.