(2R,3S,4R,5R,6R)-2-(acetoxymethyl)-6-(cyclohexylthio)-5-(2-(3-fluorophenyl)-5,6-dihydro-4H-1,3-oxazine-4-carboxamido)-tetrahydro-2H-pyran-3,4-diyl diacetate 在
sodium methylate 作用下,
以
甲醇 为溶剂,
生成 (S)-N-((2R,3R,4R,5S,6R)-2-(cyclohexylthio)-4,5-dihydroxy-6-(hydroxymethyl)-tetrahydro-2H-pyran-3-yl)-2-(3-fluorophenyl)-5,6-dihydro-4H-1,3-oxazine-4-carboxamide 、 (R)-N-((2R,3R,4R,5S,6R)-2-(cyclohexylthio)-4,5-dihydroxy-6-(hydroxymethyl)-tetrahydro-2H-pyran-3-yl)-2-(3-fluorophenyl)-5,6-dihydro-4H-1,3-oxazine-4-carboxamide