Acetic acid (2R,3aR,5R,6R,7S,7aR)-6-acetoxy-2-cyano-2,5-dimethyl-tetrahydro-[1,3]dioxolo[4,5-b]pyran-7-yl ester 在
sodium methylate 作用下,
以
吡啶 、
甲醇 为溶剂,
以94%的产率得到(2R,3aR,5R,6S,7S,7aR)-6,7-Dihydroxy-2,5-dimethyl-tetrahydro-[1,3]dioxolo[4,5-b]pyran-2-carbonitrile