Methyl (2S,3S,4S,9RS)-4-(1,3-Dioxolan-2-ylmethyl)-3,4-dihydro-3-<1-(methylsulfonyloxy)ethyl>-2-(2,3,4,6-tetraacetyl-β-D-glucopyranosyloxy)-2H-pyran-5-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
1,5-二氮杂双环[4.3.0]壬-5-烯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
吡啶                                                                                  为溶剂,
                                                                                                                                                    反应 48.0h,
                                                                                                                以40%的产率得到Methyl (2S,4S)-4-(1,3-Dioxolan-2-ylmethyl)-3-<(E)-ethylidene>-3,4-dihydro-2-(2,3,4,6-tetraacetyl-β-D-glucopyranosyloxy)-2H-pyran-5-carboxylate