Acetic acid (3R,4S,6R)-4,5-bis-(tert-butyl-dimethyl-silanyloxy)-2-(tert-butyl-diphenyl-silanyloxymethyl)-6-phenylsulfanyl-tetrahydro-pyran-3-yl ester                                                                                                                                                              在
                                                                                                                                                                                 
N-溴代丁二酰亚胺(NBS)   、                                                                                                  
4,4'-二氨基二苯乙烯-2,2'-二磺酸                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 Acetic acid (3R,4S,6R)-4,5-bis-(tert-butyl-dimethyl-silanyloxy)-2-(tert-butyl-diphenyl-silanyloxymethyl)-6-fluoro-tetrahydro-pyran-3-yl ester   、                                                                                             Acetic acid (3R,4S,6S)-4,5-bis-(tert-butyl-dimethyl-silanyloxy)-2-(tert-butyl-diphenyl-silanyloxymethyl)-6-fluoro-tetrahydro-pyran-3-yl ester