反应详情

Aqueous 65% nitric acid (5.04 g, 0.052 mole) was added under stirring at room temperature to the oxazinone ((d), 12 g, 0.047 mole) in acetic acid (ml 30). After 1 hour, the separated solid was filtered and washed with acetic acid to give the nitroxazinone ((e), 9 g, 64%) as yellow prisms. The product structure was confirmed by NMR analysis.

1. filtrationthe separated solid was filtered
2. washwashed with acetic acid