(2S,3S,4S,5R,6R)-3-((2R,3R,4R,5S,6R)-4,5-Diacetoxy-6-acetoxymethyl-3-azido-tetrahydro-pyran-2-yloxy)-4,5-bis-(4-methyl-benzoyloxy)-6-(2,2,2-trichloro-acetimidoyloxy)-tetrahydro-pyran-2-carboxylic acid methyl ester 、 C
71H
78O
16 在
3 A molecular sieve 、
三氟化硼乙醚 作用下,
以
甲苯 为溶剂,
以71%的产率得到Benzyl O-(2-azido-3,4,6-tri-O-acetyl-2-deoxy-α-D-glucopyranosyl)-(1->4)-O-(methyl 2,3-di-O-p-methylbenzoyl-β-D-glucopyranosyluronate)-(1->3)-O-(2-O-benzyl-4,6-O-benzylidene-β-D-galactopyranosyl)-(1->3)-O-(2,4,6-tri-O-benzyl-β-D-galactopyranosyl)-...