双丙酮半乳糖 、
Benzoic acid (2R,3R,4R,5R,6R)-3-azido-5-benzyloxy-2-fluoro-6-(2,2,2-trifluoro-ethoxysulfonyloxymethyl)-tetrahydro-pyran-4-yl ester 在
二氯二茂锆 、 silver perchlorate 作用下,
以
二氯甲烷 为溶剂,
以64%的产率得到Benzoic acid (3R,4R,5R,6R)-3-azido-5-benzyloxy-2-((3aR,5R,5aS,8aS,8bR)-2,2,7,7-tetramethyl-tetrahydro-bis[1,3]dioxolo[4,5-b;4',5'-d]pyran-5-ylmethoxy)-6-(2,2,2-trifluoro-ethoxysulfonyloxymethyl)-tetrahydro-pyran-4-yl ester