p-Methoxyphenyl 4,6-O-benzylidene-2-deoxy-2-phthalimido-β-D-glucopyranoside   、                                                                                      
3,4,6-tri-O-benzyl-2-O-acetyl-α-D-glucosyl trichloroimidate                                                                                                                                                              在
                                                                                                                                                                                 silica gel supported sulfuric acid                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 0.75h,
                                                                                                                以91%的产率得到p-methoxyphenyl 2-O-acetyl-3,4,6-tri-O-benzyl-β-D-glucopyranosyl-(1→3)-4,6-O-benzylidene-2-deoxy-2-phthalimido-β-D-glucopyranoside