Novel Pyrimidines with Extended π-Conjugated Chains

The reactions of benzamidine, 4-methyl-, 4- iso -butoxy-, and 4-butoxybenzamidine hydrochlorides with chalcone and substituted chalcones in alcohol in the presence of KOH yielded 2,4,6-triarylpyrimidines. 4-Phenyl-2,6-bis(4-methylphenyl)pyrimidine and 1,3-bis(4-phenyl-6-{4-[( E )-styryl]phenyl]pyrimidin-2-yl}benzene) were reacted with (2-chlorophenyl)[(1 E )-phenylmethylene]amine in the system KOH/LiH/DMF to give, respectively, 4-phenyl-2,6-bis{4-[( E )-styryl]phenyl}pyrimidine and 1,3-bis(4-phenyl-6-{4-[( E )-styryl]phenyl}pyrimidin-2-yl)benzene.