3-Aminophenol → 3-({7-Aminopyrido[4,3-d]pyrimidin-4-yl}amino)phenol

Participants

Reaction Conditions

Reaction Steps

A mixture of 7-amino-4-methylthiopyrido[4,3-d]pyrimidine (299 mg, 1.56 mmole) and 3-aminophenol (1.60 g, 14.7 mmole) is stirred at 160° C. for 15 min. The resulting product is chromatographed over silica gel (9% MeOH/CH2Cl2) to give 7-amino-4-(3-hydroxyanilino)pyrido[4,3-d]pyrimidine (108 mg, 18%) as a pale orange solid. 1H NMR (DMSO) δ 9.69 (1H, brs), 9.44 (1H, brs), 9.33 (1H, s), 8.38 (1H, s), 7.37 (1H, t, J=2.1 Hz), 7.21 (1H, brd, J=8.4 Hz), 7.14 (1H, t, J=8.0 Hz), 6.59 (2H, brs), 6.53 (1H, ddd, J=7.9, 2.2, 0.8 Hz), 6.43 (1H, s).

Provenance & Evidence