反应详情

Under ice-cooling, 0.569 g of 6,8-dibromo-2-[4-bromo-1-(3-chloro-2-pyridinyl)-1H-pyrrol-2-yl]-4H-3,1-benzoxazine-4-one, 0.20 g of hydrazine monohydrate and 2 ml of tetrahydrofuran were mixed, and the mixture was stirred at room temperature for 1 hour. Water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with water, dried over sodium sulfate, and concentrated under reduced pressure to obtain 0.53 g of 4-bromo-N-[4,6-dibromo-2-(hydrazinocarbonyl)phenyl]-1-(3-chloro-2-pyridinyl)-1H-pyrrole-2-carboxamide of the formula:

1. temperatureUnder ice-cooling
2. extractionthe mixture was extracted with ethyl acetate
3. washThe organic layer was washed with water
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated under reduced pressure