Benzoic acid (2S,3S,4S,5R,6R)-4,5-bis-benzyloxy-6-benzyloxymethyl-2-((2R,3R,4S,5S,6S)-3,4,5-tris-benzyloxy-6-pent-4-enyloxy-tetrahydro-pyran-2-ylmethoxy)-tetrahydro-pyran-3-yl ester 在
sodium methylate 作用下,
以
甲醇 、
二氯甲烷 为溶剂,
以92%的产率得到(2S,3S,4R,5R,6R)-4,5-Bis-benzyloxy-6-benzyloxymethyl-2-((2R,3R,4S,5S,6S)-3,4,5-tris-benzyloxy-6-pent-4-enyloxy-tetrahydro-pyran-2-ylmethoxy)-tetrahydro-pyran-3-ol