phenyl 4-O-acetyl-2,3,6-tri-O-methyl-β-D-glucopyranosyl-[1-4]-2,3,6-tri-O-methyl-1-thio-β-D-glucopyranoside                                                                                                                                                              在
                                                                                                                                                                                 
N-溴代丁二酰亚胺(NBS)   、                                                                                                  
二乙胺基三氟化硫                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 20.0h,
                                                                                                                以80%的产率得到4-O-acetyl-2,3,6-tri-O-methyl-β-D-glucopyranosyl-[1-4]-2,3,6-tri-O-methyl-α-D-glucopyranosyl fluoride