2,3,4,6-四-O-乙酰基-α-D-吡喃甘露糖 三氯乙酰亚胺酯 、
Methyl 2,4-di-O-benzyl-6-O-(tert-butyldiphenylsilyl)-α-D-mannopyranoside 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
以74%的产率得到Acetic acid (2R,3S,4S,5R,6R)-4,5-diacetoxy-6-acetoxymethyl-2-[(2R,3R,4S,5S,6S)-3,5-bis-benzyloxy-2-(tert-butyl-diphenyl-silanyloxymethyl)-6-methoxy-tetrahydro-pyran-4-yloxy]-tetrahydro-pyran-3-yl ester