Water → HCID 18548528, compound

Participants

Reaction Steps

Potassium carbonate (43.32 mmol, 5.987 g) was added to a solution of Example 161 (7.22 mmol, 2.066 g) in 200 mL MeOH (gently heated with a heat gun to get it in solution) and 100 mL H2O. The reaction mixture was stirred at rt for 24 h. The MeOH was removed in vacuo and the residue was taken up in H2O and extracted with EtOAc. The aqueous layer was made acidic (pH 0-1) using 2N HCl when the product precipitates out of solution as a white solid. The solid was filtered, washed with H2O and dried (1.878 g; 96%). The product was used without further purification: mp=257-259° C.; 1H NMR (DMSO-d6) δ 1.83-1.93 (m, 2H), 2.33 (t, 2H, J=6.0 Hz), 2.75 (t, 2H, J=6.0 Hz), 3.52-3.56 (m, 2H), 4.22 (br s, 2H), 6.34 (s, 1H), 7.07 (t, 1H, J=6.0 Hz), 7.65 (d, 1H, J=6.0 Hz), 7.75 (d, 1H, J=6.0 Hz), 8.23 (t, 1H, J=6.0 Hz), 11.98 (br s, 1H); HRMS calcd. for C15H16N2O3 (M+) 272.1161, found (M+) 272.1151.

Provenance & Evidence