Method A, applied to the 2-trifluoromethyl series gave the.~-acetamido-6-chloro-4- alkylamino-2-trifluoro-methylpyrimidines as side products. With method B, the side products were the corresponding>-formamidopyrimidines. KO side product was isolated when using method C 011 the 2-trifluoroniethyl compounds or when using any of the methods on the 6- trifluoromethyl series. X o attempt was made to cyclize the butylamino pyrimidines (111 ...