Improved Method of Dibromocyclopropane Derivatives Synthesis in Catalytic Two-Phase Reaction

Abstract

Recently we have described a new catalytic method of generation of dichlorocarbene and simple synthesis of dichlorocyclo-propane derivatives in two-phase system¹. This method consists in reaction of chloroform and olefin with concentrated aqueous NaOH solution in the presence of quaternary ammonium compounds that acts as a catalyst. In our hands triethylbenzylammonium chloride TEBA was the most convenient catalyst.