Acetic acid (2R,3R,4S,5R,6R)-4,5-bis-benzyloxy-2-[((2S,3S,4S,5R,6S)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran-2-carbonyl)-amino]-6-trityloxymethyl-tetrahydro-pyran-3-yl ester 在
对甲苯磺酸 作用下,
以
甲醇 、
二氯甲烷 为溶剂,
反应 2.0h,
以94%的产率得到Acetic acid (2R,3R,4S,5R,6R)-4,5-bis-benzyloxy-6-hydroxymethyl-2-[((2S,3S,4S,5R,6S)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran-2-carbonyl)-amino]-tetrahydro-pyran-3-yl ester