双丙酮半乳糖 、
3,4-di-O-benzyl-6-O-4'-oxo-5'-phenyl-valeryl-2-pivaloyl-D-glucopyranosyl trichloroacetamide 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以37%的产率得到4-Oxo-5-phenyl-pentanoic acid (2R,3R,4S,5R,6R)-3,4-bis-benzyloxy-5-(2,2-dimethyl-propionyloxy)-6-((3aR,5R,5aS,8aS,8bR)-2,2,7,7-tetramethyl-tetrahydro-bis[1,3]dioxolo[4,5-b;4',5'-d]pyran-5-ylmethoxy)-tetrahydro-pyran-2-ylmethyl ester