Potassium Hydroxide → HCID 9823662, compound

Participants

Reaction Conditions

Reaction Steps

Potassium hydroxide (1.18 g, 21.1 mmol) was added to a solution of (3) (0.5 g, 1.05 mmol) in MeOH/H2O (20 mL, 10%; v/v). The reaction mixture was heated to 85° C. for 12 h, then cooled to room temperature. The mixture was concentrated, acidified with HCl (aq) (20 mL, 3M) and the desired product was filtered and rinsed with cold H2O to give 0.46 g (quantitative yield) of the title compound: 1H NMR (DMSO) δ 12.36 (br s, 1H), 9.56 (br s, 1H), 8.78 (br s, 2H), 8.36 (s, 1H), 8.07 (d, 1H, J=9.2), 7.75 (s, 1H), 7.61 (s, 1H), 7.11 (d, 1H, J=9.3), 4.64 (m, 2H), 4.29 (m, 1H), 3.85 (s, 3H), 3.83 (s, 3H), 3.37 (m, 2H), 2.12 (m, 2H), 1.60 (m, 2H); 13C NMR (DMSO) δ 164.7, 161.3, 155.2, 154.4, 151.0, 146.7, 141.8, 140.1, 136.3, 115.2, 112.4, 105.2, 101.6, 99.3, 56.3, 56.0, 48.4, 43.3, 30.4; HRMS (FAB) m/z 425.1948 (M+H)+ (C21H24N6O4 requires 425.1937); Anal. (C21H24N6O4 ·2HCl·2H2O) C, H, N.

Provenance & Evidence