反应详情

A mixture of 2-methyl-1,5-naphthyridine (8-2) (2.9 g, 20.1 mmol) and SeO2(2.2 g, 20.1 mmol) in 40 mL of dioxane was refluxed for 3 h. After cooled to room temperature, the reaction mixture was concentrated. The residue was treated with brine and extracted with DCM/i-PrOH=4/1. The organic layer was washed with brine, dried over Na2SO4, concentrated and purified by chromatography on silica gel to afford the title compound (1.81 g).

1. temperaturewas refluxed for 3 h
2. concentrationthe reaction mixture was concentrated
3. additionThe residue was treated with brine
4. extractionextracted with DCM/i-PrOH=4/1
5. washThe organic layer was washed with brine
6. dry with materialdried over Na2SO4
7. concentrationconcentrated
8. custompurified by chromatography on silica gel