Synthesis of O-(triazol-4-yl)alkyl carbamates 17-30, 32-33. Reagents and conditions: a) prop-2-yn-1-yl N-cyclohexylcarbamate, sodium L-ascorbate, copper (II) sulfate pentahydrate, H2O-tert-BuOH 1:1, rt, 3h; a’) but-3-yn-1-ol, sodium L-ascorbate, copper (II) sulfate pentahydrate, H2O-tert-BuOH 1:1, rt, 3h; b’) cyclohexyl isocyanate, DMAP, dry MeCN, 80 °C, 5h.