O-(methyl 2,3,4-tri-O-acetyl-β-D-glucopyranosyluronate)-(1->3)-4,6-di-O-acetyl-2-deoxy-2-trichloroacetamido-1-O-trichloroacetimidoyl-α-D-galactopyranose   、                                                                                      2-(benzyloxycarbonylamino)ethyl O-(methyl 2,3-di-O-benzoyl-β-D-glucopyranosyluronate)-(1->3)-4-O-benzoyl-6-O-chloroacetyl-2-deoxy-2-trichloroacetamido-β-D-galactopyranoside                                                                                                                                                              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2-(benzyloxycarbonylamino)ethyl O-(methyl 2,3,4-tri-O-acetyl-β-D-glucopyranosyluronate)-(1>3)-(4,6-di-O-acetyl-2-deoxy-2-trichloroacetamido-β-D-galactopyranosyl)-(1->4)-(methyl 2,3-di-O-benzoyl-β-D-glucopyranosyluronate)-(1->3)-4-O-benzoyl-6-O-chloroacetyl-2-deoxy-2-trichloroacetamido-β-D-galactopyranoside