(2R,3S,4S,5R,6R)-3,4,5-Triacetoxy-6-[(2R,3S,4R,5R,6S)-2-acetoxymethyl-5-azido-4-benzyloxy-6-(2,2,2-trichloro-acetimidoyloxy)-tetrahydro-pyran-3-yloxy]-tetrahydro-pyran-2-carboxylic acid methyl ester 、 methyl [methyl (methyl 2-O-acetyl-3-O-benzyl-α-L-idopyranosyluronate)-(1->4)-(6-O-acetyl-2-azido-3-O-benzyl-2-deoxy-α-D-glucopyranosyl)-(1->4)-2-O-allyl-3-O-benzyl-α-L-idopyranosid]uronate 在
4 A molecular sieve 、
叔丁基二甲硅基三氟甲磺酸酯 作用下,
以
甲苯 为溶剂,
反应 1.5h,
以68%的产率得到methyl O-(methyl 2,3,4-tri-O-acetyl-α-L-idopyranosyluronate)-(1->4)-O-(6-O-acetyl-2-azido-3-O-benzyl-2-deoxy-α-D-glucopyranosyl)-(1->4)-O-(methyl 2-O-acetyl-3-O-benzyl-α-L-idopyranosyluronate)-(1->4)-O-(6-O-acetyl-2-azido-3-O-benzyl-2-deoxy-α-D-...)