1,8-二氮杂双环[5.4.0]十一碳-7-烯 、
3-(4-trifluoromethylpyridin-2-yl)-1,2,4-oxadiazol-5-one 、
2,2-二甲基丁酰氯 在
resultant solution 、
4-(2,2-dimethylbutanoyl)-3-(4-trifluoromethylpyridin-2-yl)-1,2,4-oxadiazol-5-one 作用下,
以
吡啶 为溶剂,
反应 3.0h,
以to obtain 0.24 g of 4-(2,2-dimethylbutanoyl)-3-(4-trifluoromethylpyridin-2-yl)-1,2,4-oxadiazol-5-one (present compound (11))的产率得到4-(2,2-dimethylbutanoyl)-3-(4-trifluoromethylpyridin-2-yl)-1,2,4-oxadiazol-5-one