Preparation of α,α,ω-trichloroalkenes from α,α,α,ω-tetrachloroalkanes

Summary

• 1. Some higher α,α,α,ω-tetrachloroalkenes were dehydrochlorinated over zinc chloride, and CCl₂ = CH(CH₂)₉ Cl and CCl₂=CH(CH₂)₁₁Cl.

• 2. In the dehydrochlorination of 1,1,1,3-tetrachloropropane over zinc chloride a high yield of 1,1,3-trichloropropene is obtained. The same substance may be isolated in the pure state by the dehydrochlorination of 1,1,1,3-tetrachloropropane with caustic alkali when 2-ethoxyethanol is used as solvent.