5-(4-chlorophenylazo)-3-cyano-4,6-dimethyl-pyridine-2-(1H)-thione 、
2,3,4,6-四乙酰氧基-alpha-D-吡喃糖溴化物 在
氢氧化钾 作用下,
以
丙酮 为溶剂,
以70%的产率得到Acetic acid (2R,3R,4S,5S,6R)-4,5-diacetoxy-6-acetoxymethyl-2-[5-(4-chloro-phenylazo)-3-cyano-4,6-dimethyl-2-thioxo-2H-pyridin-1-yl]-tetrahydro-pyran-3-yl ester