乙酸酐 、
5-Ethyl-4-((2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yl)-2,4-dihydro-[1,2,4]triazole-3-thione 以
吡啶 为溶剂,
反应 12.0h,
以51%的产率得到[(2R,3R,4S,5R,6R)-3,4,5-triacetyloxy-6-(3-ethyl-5-sulfanylidene-1H-1,2,4-triazol-4-yl)oxan-2-yl]methyl acetate