Formaldehyde → HCID 53630950, compound

Participants

Reaction Conditions

Reaction Steps

Aqueous formaldehyde (37%, 894 ml, 12.0 mmol) was added to a solution of N-(3,4-dichlorophenyl)-6-(methyloxy)-7-{[(5-piperidin-4-yl-1,2,4-oxadiazol-3-yl)methyl]oxy}quinazolin-4-amine (1 g, 2.0 mmol) in formic acid (2 ml). The mixture was heated at 95° C. for two hours. The volatiles were removed under vacuum, the residue was dissolved in CH3OH and the pH of the solution was adjusted to 9 by addition of Biorad AG® 1-X8 hydroxide form resin. The solution was filtered, concentrated in vacuo and the residue was crystallized from MeOH/H2O to give N-(3,4-dichlorophenyl)-6-(methyloxy)-7-({[5-(1-methylpiperidin-4-yl)-1,2,4-oxadiazol-3-yl]methyl}oxy)quinazolin-4-amine (714 mg; 69% yield). 1H NMR (400 MHz; DMSO-d6): 1.69-1.82 (m, 2H), 1.97-2.05 (m, 4H), 2.16 (s, 3H), 2.71-2.78 (m, 2H), 2.98-3.10 (m, 1H), 3.96 (s, 3H), 5.44 (s, 2H), 7.39 (s, 1H), 7.62 (d, 1H), 7.83 (s, 1H), 7.87 (dd, 1H), 8.22 (d, 1H), 8.53 (s, 1H), 9.63 (s, 1H); MS (EI) for C24H24Cl2N6O3: 515.07 (MH+)

Provenance & Evidence