反应详情

7-Fluoro-1,5-naphthyridin-2(1H)-one (1.280 g, 7.798 mmol) and m-chloroperoxybenzoic acid (2.123 g, ca. 1.2 eq. based on an mCPBA content of 75%) were stirred in chloroform (60 mL) at reflux overnight. Further mCPBA (0.420 g) was added and the mixture was stirred at reflux for an additional 6 hours. The mixture was diluted with DCM to a total volume of ca. 100 ml and filtered with suction. The solid collected was washed with DCM (2×20 mL) and air-dried to give 7-fluoro-1,5-naphthyridin-2(1H)-one 5-oxide as a tan solid (1.045 g, contaminated with ca. 12% starting material).

1. temperatureat reflux overnight
2. temperatureat reflux for an additional 6 hours
3. filtrationfiltered with suction
4. customThe solid collected
5. washwas washed with DCM (2×20 mL)
6. customair-dried