Facile synthesis of 2,4‐diamino‐6‐alkyl‐ or 6‐aryl‐pyrimidine derivatives

Facile methods were developed to prepare a series of 6-phenyl and 6-alkyl-2,4-diaminopyrimidine derivatives. The pyrimidine ring of the final products was constructed by treatment of a 1,3-dicarbonyl derivative with an amidine or guanidine. The 6-phenyl-pyrimidine derivatives were also prepared by Suzuki coupling reaction, using 2-methylthio-4,6-dichloropyrimidine as the starting material. J. Heterocyclic Chem., (2010).