PROCESS FOR THE PREPARATION OF 2-CHLORO-ACETOACETIC ACID ESTERS

摘要

1. Process for the production of 2-chloroacetoacetic esters, characterized in converting diketene at temperatures of from +10 to -40 degrees C in the presence of chlorinated aliphatic hydrocarbons as solvent by using hydrogen chloride into the acetoacetic chloride, forming the 2-chloroacetoacetic chloride by introducing of chlorine at temperature of from +10 to -40 degrees C, and converting the 2-chloroacetoacetic chloride by adding of alcohols having from 1 to 4 carbon atoms at temperatures of from +10 to -40 degrees C into the corresponding esters.