乙酸酐 、 3-[(3aS,4S,6S,7S,7aS)-7-hydroxy-2,2,6-trimethyl-3,3a,4,6,7,7a-hexahydrooxasilolo[4,5-c]pyran-4-yl]propanenitrile 在
吡啶 、 potassium fluoride 、
间氯过氧苯甲酸 作用下,
生成
Acetic acid (2S,3S,4S,5S,6S)-4-acetoxy-6-(2-cyano-ethyl)-5-hydroxymethyl-2-methyl-tetrahydro-pyran-3-yl ester