Acetic acid (2R,3R,4S,5S)-4,5-diacetoxy-2-[3-cyano-4-(4-methoxy-phenyl)-2-thioxo-6-p-tolyl-2H-pyridin-1-yl]-tetrahydro-pyran-3-yl ester 在
氨 作用下,
以
甲醇 为溶剂,
以84%的产率得到4-(4-methoxyphenyl)-6-(4-methylphenyl)-2-sulfanylidene-1-[(2R,3R,4S,5S)-3,4,5-trihydroxyoxan-2-yl]pyridine-3-carbonitrile