(4R,5R,E)-methyl 4,5,6-trihydroxy-4-C-hydroxymethyl-4,5-O-isopropylidene-4'-O-tert-butyldiphenylsilylhex-2-enoate                                                                                                                                                              在
                                                                                                                                                                                 
甲醇   、                                                                                                  
sodium methylate                                                                                                                                  作用下,
                                                                                                                                                                                        反应 1.5h,
                                                                                                                以99%的产率得到methyl 3,6-anhydro-2-deoxy-4-C-hydroxymethyl-4,5-O-isopropylidene-4'-O-tert-butyldiphenylsilyl-D-gluconate