3-(5-tert-butoxycarbonyl-pyridin-2-yl)-5-(3-cyano-5-fluorophenyl)-1,2,4-oxadiazole                                                                                                                                                                                              以
                                                                                         
甲酸                                                                                  为溶剂,
                                                                                                                                                    反应 17.0h,
                                                                                                                以afforded crude 3-(5-hydroxycarbonylpyrid-2-yl)-5-(3-cyano-5-flourophenyl)-1,2,4-oxadiazole as a white solid的产率得到3-(5-hydroxycarbonylpyrid-2-yl)-5-(3-cyano-5-flourophenyl)-1,2,4-oxadiazole