A combined use of trityl tetrakis(pentafluorophenyl) borate [TrB(C6F5)(4)], iodine (I-2) and 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) effectively activates disarmed thioglycosides to afford the corresponding disaccharides in high yields on treatment with several glycosyl accepters.
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