Triethylamine → HCID 59699661, compound

Participants

Reaction Conditions

Reaction Steps

Triethylamine (1.2 mL, 8.6 mmol) was added to a suspension of 1-benzyl-4-hydroxy-3-(methylsulfonyl)-[1,8]-naphthyridin-2(1H)-one (114) (0.94 g, 2.9 mmol) in neat POCl3 and heated at 90° C. for 3 h. The solution was cooled and the excess POCl3 was distilled under vacuum. The residue was suspended in water, neutralized by solid NaHCO3, and extracted by dichloromethane. The organic layer was subsequently washed by saturated NaHCO3 solution, water and brine, dried over Na2SO4, and evaporated to yield 1-benzyl-4-chloro-3-(methylsulfonyl)-[1,8]-naphthyridin-2(1H)-one (115) as yellow solid. Yield 0.92 g (92%), mp 191° C. 1H-NMR (DMSO-d6): δ 3.50 (s, 3H), 5.65 (s, 2H), 7.28 (m, 5H), 7.55 (m, 1H), 8.70 (dd, J=1.6, 8.4 Hz, 1H), 8.84 (dd, J=1.6, 4.4 Hz, 1H); EIMS m/z 349 (M+1).

Provenance & Evidence