Dimethylformamide → 2-methyl-2,6-naphthyridin-1(2H)-one

Sodium hydride (60% in mineral oil, 328 mg, 8.2 mmol) was added portionwise to a suspension of 2H-[2,6]naphthyridin-1-one (1 g, 2.05 mmol) (see reference J. Het. Chem. 1981, 18(7), 1349) in anhydrous N,N-dimethylformamide (25 ml) under a nitrogen atmosphere and the mixture was stirred at room temperature for 1 hour. lodomethane (510 μl, 8.2 mmol) was added and the mixture was stirred for 18 hours. The reaction mixture was evaporated under reduced pressure and the residue was partitioned between dichloromethane (50 ml) and water (20 ml). The aqueous phase was extracted with dichloromethane (2×30 ml) and the combined organic layers were dried over magnesium sulphate and evaporated under reduced pressure. The residue was purified by chromatography on silica gel using methanol in dichloromethane (gradient from 2:98 to 5:95) to give the title compound (750 mg).

1. additionlodomethane (510 μl, 8.2 mmol) was added
2. stirringthe mixture was stirred for 18 hours
3. customThe reaction mixture was evaporated under reduced pressure
4. customthe residue was partitioned between dichloromethane (50 ml) and water (20 ml)
5. extractionThe aqueous phase was extracted with dichloromethane (2×30 ml)
6. dry with materialthe combined organic layers were dried over magnesium sulphate
7. customevaporated under reduced pressure
8. customThe residue was purified by chromatography on silica gel

ORD record

ord-52278ad80ee347d9aeafd3a7683ef33b

Source dataset

uspto-grants-2007_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07157468B2