B.-To 10 ml. of refluxing aniline was carefully added 2.0 g. of 4-ammo-2-chloropyrido(3,2-d)pyrimidine (VII) and the heating was continued for 30 minutes. After cooling, the product was treated with 10 ml. of 50% ethanol containing a little sodium hydroxide, and filtered. The solid was recrystallized from ethanol to yield 0.6 g. of tan needles, m.p. 168-170°. A mixed melting point of this product with that of III prepared by method A was 168-170°.2,4-Bis-(dimethylamino)-pyrido(3,2-d)pyrimidme (II).-• This product was prepared from 2,4-dichloropyrido(3,2-d)-
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