2,3,6,2',3',4',6'-hepta-O-acetyl-α-D-lactosyl trichloroacetimidate 、
(2S,3S,4S,5R,6R)-3,5-Diacetoxy-6-azido-4-hydroxy-tetrahydro-pyran-2-carboxylic acid allyl ester 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
以55%的产率得到prop-2-enyl (2S,3S,4S,5R,6R)-4-[[(3aR,5R,6R,7S,7aR)-7-acetyloxy-5-(acetyloxymethyl)-2-methyl-6-[(2S,3R,4S,5S,6R)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-5,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-b]pyran-2-yl]oxy]-3,5-diacetyloxy-6-azidooxane-2-carboxylate