6-(2,6-Dimethylphenyl)pyrido[2,3-d]pyrimidin-7-amine

In the title compound, C15H14N4, the pyrido[2,3-d]pyrimidine system is almost ideally planar (r.m.s. deviation 0.028 Å) with its mean plane almost orthogonal to the 2,6-dimethylphenyl plane. The dihedral angle formed by these planes [87.3 (2)°] is close to the predicted value (89.7°) obtained by molecular-mechanics force-field calculations. Only one of the two active amine H atoms participates in hydrogen bonding, which links molecules into centrosymmetric dimers