mercapto-tert-butyl 2-O-acetyl-3,4,6-tri-O-benzoyl-α-D-mannopyranosyl-(1→3)-2,4-di-O-benzoyl-1-thio-β-D-mannopyranose 、
2-O-acetyl-3,4,6-tri-O-benzoyl-α-D-mannopyranosyl-(1→6)-[2-O-acetyl-3,4,6-tri-O-benzoyl-α-D-mannopyranosyl-(1→3)]-2,4-di-O-benzoyl-α-D-mannopyranosyl trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以93%的产率得到mecapto-tert-butyl 2-O-acetyl-3,4,6-tri-O-benzoyl-α-D-mannopyranosyl-(1→6)-[2-O-acetyl-3,4,6-tri-O-benzoyl-α-D-mannopyranosyl-(1→3)]-2,4-di-O-benzoyl-α-D-mannopyranosyl-(1→6)-[2-Oacetyl-3,4,6-tri-O-benzoyl-α-D-mannopyranosyl-(1→3)]-2,4-di-Obenzoyl-1-thio-β-D-mannopyranoside