(2,3,7-tri-O-acetyl-6-O-benzyl-4-O-para-bromobenzyl-L-glycero-α-D-mannoheptopyranosyl)-(1→7)-2,3-di-O-acetyl-6-O-benzyl-4-O-para-bromobenzyl-L-glycero-α-D-mannoheptopyranosyl trichloroacetimidate 、
N-benzyl-N-benzyloxycarbonyl-5-aminopentyl 2-O-acetyl-6-O-benzyl-4-O-para-bromobenzyl-7-O-tert-butyldiphenylsilyl-L-glycero-α-D-mannoheptopyranoside 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 、
甲苯 为溶剂,
反应 1.0h,
以67%的产率得到N-benzyl-N-benzyloxycarbonyl-5-aminopentyl (2,3,7-tri-O-acetyl-6-O-benzyl-4-O-para-bromobenzyl-L-glycero-α-D-mannoheptopyranosyl)-(1→7)-(2,3-di-O-acetyl-6-O-benzyl-4-O-para-bromobenzyl-L-glycero-α-D-mannoheptopyranosyl)-(1→3)-2-O-acetyl-6-O-benzyl-4-O-para-bromobenzyl-7-O-tert-butyldiphenylsilyl-L-glycero-α-D-mannoheptopyranoside