methyl (2S)-2-amino-3-O-benzyl-4,6-O-benzylidene-2-deoxy-2-C-methoxycarbonyl-α-D-arabino-hexoside 、
methyl (2S)-2-azido-3-O-benzyl-4,6-O-benzylidene-2-C-carboxy-2-deoxy-α-D-arabino-hexoside 在
对甲苯磺酰氯 作用下,
以
吡啶 为溶剂,
以62%的产率得到(2R,4aR,6S,7S,8R,8aS)-7-[((2R,4aR,6S,7S,8R,8aS)-7-Azido-8-benzyloxy-6-methoxy-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxine-7-carbonyl)-amino]-8-benzyloxy-6-methoxy-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxine-7-carboxylic acid methyl ester