[(2R,3S,4S,5R,6R)-3,4,5-triacetyloxy-6-(5-cyano-2,3-dimethyl-6-sulfanylidenepyridin-1-yl)oxan-2-yl]methyl acetate 在
氨 作用下,
以
甲醇 为溶剂,
反应 0.5h,
以84%的产率得到5,6-Dimethyl-2-thioxo-1-((2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yl)-1,2-dihydro-pyridine-3-carbonitrile