bis-(4,6-O-benzylidene-β-D-galactopyranosyl)sulfane   、                                                                                      
苯甲酰氯                                                                                                                                                                                              以
                                                                                         
吡啶                                                                                  为溶剂,
                                                                                                                                                    反应 2.67h,
                                                                                                                以40%的产率得到[(2S,4aR,6S,7R,8R,8aS)-6-[[(2S,4aR,6S,7R,8S,8aS)-7,8-dibenzoyloxy-2-phenyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-6-yl]sulfanyl]-7-hydroxy-2-phenyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-8-yl] benzoate