tert-butyldiphenylsilyl 2-azido-4,6-O-benzylidene-2-deoxy-β-D-galactopyranoside 、
O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1<*>4)-3,6-di-O-acetyl-2-deoxy-2-phthalimido-D-glucopyranosyl trichloroacetimidate 在
3 A molecular sieve 、
三氟化硼乙醚 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 2.0h,
以84%的产率得到tert-butyldiphenylsilyl O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1<*>4)-3,6-di-O-acetyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl-(1<*>3)-2-azido-4,6-O-benzylidene-2-deoxy-β-D-galactopyranoside