ACTIVATION AND FACILE DEALKYLATION OF MONOOXIDES OF 2,2'-BIS(ALKYLTHIO)BIPHENYL WITH TRIFLIC ANHYDRIDE VIA DITHIADICATIONS - A NEW METHOD FOR PREPARATION OF THIASULFONIUM SALTS

摘要

Monooxides of 2,2'-bis(alkylthio)biphenyl undergo facile monodealkylation on treatment with triflic anhydride to afford the corresponding thiasulfonium salts except bis(methylthio) derivative. The reaction proceeds via an initial formation of the corresponding dithiadications. [References: 11]