Copper Catalysis in the Methylenation of Arsenic Trichloride and Arsenic Tribromide.

摘要

Dramatic increases in yields of methylene-insertion products in the reactions of diazomethane with arsenic trichloride and arsenic tribromide were achieved through the use of copper catalysis. Mono-and bis-insertion products, XCH2AsX2and (XCH2)2AsX (X =Cl or Br),but no tris-halomethyl arsines were obtained. The success of the procedure depends upon the use of ether solvent reclaimed from previous reactions.