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Fast and highly efficient oxidative coupling of thiols by o-xylylene bis (triphenylphosphonium) dichromate under solvent-free conditions

Ali Noorani, Ali Amoozadeh, Mahmood Tajbaksh, Yaser Kamel, Hassan Ghasemnejad-Bosra

A fast and efficient solid state method for the chemoselective room temperature oxidative coupling of thiols to afford their corresponding disulfides using o-xylylene bis (triphenylphosphonium) dichromate as reagent is described. The reaction was applicable to a variety of thiols for giving high yields after short reaction times. Comparison of time/yield ratios of this method with some of those reported in the literature shows the superiority of this reagent over others under these conditions.