| abstract |
(57) [Summary] [Structure] Chlorobutene and carbon monoxide are reacted in the presence of a palladium catalyst to give 3-pentenoyl chloride, carbon monoxide, 3-chloro-1-butene and 1-chloro-2-. A reaction mixture containing butenes is formed, a mixture containing 3-pentenoyl chloride and chlorobutenes is separated from the rest of the reaction mixture above, and the separated mixture is reacted with water, butadiene and hydrochloric acid. 3-pentenoic acid, 3-chloro-1-butene, which comprises the steps of forming two phases including an organic phase containing pentenoic acid, chlorovaleric acid and chlorobutenes and an aqueous phase, and separating the two phases Production of 1-chloro-2-butene. [Effect] According to the method of the present invention, the amount of by-products generated due to the formation of chlorovaleric acid is small. |