Novel Synthesis of Difluoromethyl-Containing 1,4-Disubstituted 1,2,3-Triazoles via a Click-Multicomponent Reaction and Desulfanylation Strategy

Fourteen difluoromethyl-containing 1,4-disubstituted 1,2,3-triazoles were synthesized via a novel copper-catalyzed click-multicomponent reaction of 2,2-difluoro-2-phenylsulfanylethanol, sodium azide and terminal alkynes in the presence of N-(p-toluenesulfonyl) imidazole, tetrabutylammonium iodide and triethylamine, followed by reductive cleavage of the phenylsulfanyl group using tributyltin hydride and azobisisobutyronitrile.