Catalysis of reactions of allyltin compounds and organotin phenoxides by lithium perchlorate

Metalloene reactions of allyltin compounds and organotin phenoxides with azo enophiles are strongly catalysed by LiClO4. The analogous effect has been observed for photochemical oxidation of allyltin derivatives and reactions of organotin phenoxides with diethyl acetylenedicarboxylate.