乙酸酐   、                                                                                      
(1R,5S,6S,7S,8R)-3-(α-D-glucopyranosylimino)-6,7,8-trihydroxy-6-hydroxymethyl-2-oxa-4-azabicyclo<3.3.0>octane                                                                                                                                                                                              以
                                                                                         
吡啶                                                                                  为溶剂,
                                                                                                                                                                                        以85%的产率得到(3aS,4S,5S,6R,6aR)-4-Hydroxymethyl-2-[(Z)-(2S,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-ylimino]-hexahydro-cyclopentaoxazole-4,5,6-triol