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Synthesis of triazoles 31 and 32: a) 1H-mercaptophenyltetrazole, PPh3, DIAD, 0 °C; b) (NH4)6Mo7O24·4H2O, H2O2, EtOH, 0 °C → RT; c) NaHMDS, THF, −78 °C; then 30, THF −78 → −20 °C; d) TsNHNH2, NaOAc, DME, H2O, 100 °C. PT = phenyl tetrazole, NaHMDS = sodium hexamethyldisilylazide, DME = dimethoxyethane.
