D a Carried on directly to next step.* Required chromatography on silica. Compounds analyzed for C, H, and E; 8, 10, and 12, analyzed for N only. Uoiliiig point. 3-substituted quinazolinories were carried out using S a H in DlISO to give the desired products. The diamines required for the ring-closure step were prepared in several different ways (Chart 11). The most convenient method is reduction of the appropriately substituted 2- ...