(E,1S,4S,5R,6R)-6-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-1-[(2R,3S,4S,5R,6S)-6-methoxy-3,4,5-tris(phenylmethoxy)oxan-2-yl]-4,5,6-tris(phenylmethoxy)hex-2-en-1-ol   、                                                                                      
溴甲苯                                                                                                                                                              在
                                                                                                                                                                                 
咪唑   、                                                                                                  sodium hydride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                                                        以75%的产率得到methyl 2,3,4,6,9,10,11-hepta-O-benzyl-7,8-dideoxy-7,8-didehydro-12,13-O-isopropylidene-α-D-glycero-D-ido-D-gluco-tridec-7(E)-eno-1,5-pyranoside