O-(2,3,4-Tri-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1-2)-(3,4,6-tri-O-benzyl-β-D-galactopyranosyl)-(1-4)-<(2,3,4-tri-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1-2)>-3-O-benzyl-α/β-D-xylopyranosyl trichloroacetimidate   、                                                                                      
Benzyl 2,4-Di-O-benzyl-6-deoxy-β-D-glucopyranoside                                                                                                                                                              在
                                                                                                                                                                                 4 A molecular sieve   、                                                                                                  
三氟化硼乙醚                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 0.5h,
                                                                                                                以87%的产率得到Benzyl O-(2,3,4-Tri-O-benzyl-6-deoxy-β-D-glucopyranosyl)-(1-2)-(3,4,6-tri-O-benzyl-β-D-galactopyranosyl)-(1-4)-<(2,3,4-tri-O-benzyl-6-desoxy-β-D-glucopyranosyl)-(1-2)>-3-O-benzyl-β-D-xylopyranosyl-(1-3)-2,4-di-O-benzyl6deoxy-β-D-glucopyranoside