(1S)-2,3,4,6-tetra-O-acetyl-1,5-anhydro-D-glucitol-spiro[1.5]-3-(4-cyanophenyl)-1,4,2-oxathiazole                                                                                                                                                              在
                                                                                                                                                                                 
甲醇   、                                                                                                  
sodium methylate   、                                                                                                  Amberlite IR-120 resin (H
+ form)                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以84%的产率得到(1S)-1,5-anhydro-D-glucitol-spiro[1.5]-3-(4-cyanophenyl)-1,4,2-oxathiazole