5-(4-methylphenylazo)-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74%的产率得到Acetic acid (2R,3R,4S,5S,6R)-4,5-diacetoxy-6-acetoxymethyl-2-(3-cyano-4,6-dimethyl-2-thioxo-5-p-tolylazo-2H-pyridin-1-yl)-tetrahydro-pyran-3-yl ester