Process for the preparation of pentachloro-3-butenoic acid esters

摘要

A process for preparing a pentachloro-3-butenoic acid alkyl ester comprises reacting the corresponding 1-alkoxyheptachloro-3-butene with an aqueous solution of an alkali metal carbonate. In a preferred embodiment, the starting material 1-alkoxyheptachloro-3-butene is the solution obtained as the reaction product of the reaction of the corresponding 1-alkoxypentachloro-1,3-butadiene with chlorine.