Acetic acid (2R,3S,4S,5R,6R)-4,5-diacetoxy-2-acetoxymethyl-2-allyl-6-((2R,3R,4S,5R,6S)-4,5-bis-benzyloxy-2-benzyloxymethyl-6-methoxy-tetrahydro-pyran-3-yloxy)-tetrahydro-pyran-3-yl ester 在
sodium methylate 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
生成 (2R,3S,4S,5R,6R)-2-Allyl-6-((2R,3R,4S,5R,6S)-4,5-bis-benzyloxy-2-benzyloxymethyl-6-methoxy-tetrahydro-pyran-3-yloxy)-2-hydroxymethyl-tetrahydro-pyran-3,4,5-triol