反应详情

A solution of 4-chloro-2-fluoro-5-nitroaniline (5.0 g, 26.3 mmol) and 2-dimethylamino-4-(trifluoromethyl)-6H-1,3-oxazin-6-one (5.73 g, 27.6 mmnol) in acetic acid is refluxed for 4 hours and poured onto ice. The resultant aqueous mixture is filtered to obtain a solid. The solid is washed with water and air-dried to give the title product as a beige solid (7.5 g, 81% yield, mp 230-232° C.) which is identified by 1H, 13C and 19F NMR spectral analyses.

1. additionpoured onto ice
2. filtrationThe resultant aqueous mixture is filtered
3. customto obtain a solid
4. washThe solid is washed with water
5. customair-dried