tert-butyldimethylsilyl 3,6-di-O-benzyl-2-(benzyloxycarbonyl)amino-2-deoxy-β-D-glucopyranoside   、                                                                                      
4-O-acetyl-3,6-di-O-benzyl-2-(benzyloxycarbonyl)amino-2-deoxy-1-O-trichloroacetimidoyl-α-D-glucopyranose                                                                                                                                                              在
                                                                                                                                                                                 
三氟化硼乙醚                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以70%的产率得到tert-butyldimethylsilyl 4-O-acetyl-3,6-di-O-benzyl-2-(benzyloxycarbonyl)amino-2-deoxy-β-D-glucopyranosyl-(1->4)-3,6-di-O-benzyl-2-(benzyloxycarbonyl)amino-2-deoxy-β-D-glucopyranoside