1,8-二氮杂双环[5.4.0]十一碳-7-烯 、
3-(4-pentafluoroethylpyridin-2-yl)-1,2,4-oxadiazol-5-one 、
1-吡咯烷羰酰氯 在
resultant solution 、
4-(1-pyrrolidinecarbonyl)-3-(4-pentafluoroethylpyridin-2-yl)-1,2,4-oxadiazol-5-one 作用下,
以
吡啶 为溶剂,
反应 4.0h,
以to obtain 0.17 g of 4-(1-pyrrolidinecarbonyl)-3-(4-pentafluoroethylpyridin-2-yl)-1,2,4-oxadiazol-5-one (present compound (63))的产率得到4-(1-pyrrolidinecarbonyl)-3-(4-pentafluoroethylpyridin-2-yl)-1,2,4-oxadiazol-5-one