反应详情

To 2.50 g (11.2 mmol) of 7-fluoro-4-isobutyl-2H-1,4-benzoxazin-3(4H)-one in 25 ml of acetic anhydride was added dropwise over 10 min. a solution of 2.5 g (26.9 mmol) of 70% nitric acid in 5 ml of glacial acetic acid. After the addition was complete, the reaction was stirred for 1 hour at room temperature then it was quenched by pouring into 50 ml of ice/water. The resulting white precipitate was collected by vacuum filtration and dried in a vacuum oven at 60° C. overnight to yield 2.71 g (90% yield) of the desired nitrated product, m.p. 108°-110° C.

1. additionAfter the addition
2. customit was quenched
3. additionby pouring into 50 ml of ice/water
4. filtrationThe resulting white precipitate was collected by vacuum filtration
5. customdried in a vacuum oven at 60° C. overnight
6. customto yield 2.71 g (90% yield) of the desired nitrated product, m.p. 108°-110° C.