(2R,3S,4S,5R,6R)-5-Acetoxy-6-[(2R,3R,4S,5R)-2-acetoxymethyl-5-benzyloxy-4-methoxy-6-(2,2,2-trichloro-acetimidoyloxy)-tetrahydro-pyran-3-yloxy]-3,4-dimethoxy-tetrahydro-pyran-2-carboxylic acid benzyl ester 、
(2R,3S,4S,5R,6R)-5-Acetoxy-6-((2R,3R,4S,5R,6S)-2-acetoxymethyl-6-{2-[2-(2-{2-[2-(2-azido-ethoxy)-ethoxy]-ethoxy}-ethoxy)-ethoxy]-ethoxy}-5-benzyloxy-4-methoxy-tetrahydro-pyran-3-yloxy)-3-hydroxy-4-methoxy-tetrahydro-pyran-2-carboxylic acid benzyl ester 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
以64%的产率得到