Acetic acid (2R,3R,4S,5R,6R)-4,5-diacetoxy-6-acetoxymethyl-2-[5-(4-chloro-phenylazo)-3-cyano-4-methyl-2-oxo-6-phenyl-2H-pyridin-1-yl]-tetrahydro-pyran-3-yl ester 在
氨 作用下,
以
甲醇 为溶剂,
以90%的产率得到5-(4-Chloro-phenylazo)-4-methyl-2-oxo-6-phenyl-1-((2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yl)-1,2-dihydro-pyridine-3-carbonitrile