Synthesis of optically active imidazo[1,2-a]pyrimidin-3(2H)-ones
摘要:
The reactions of 2-chloro-4-(substituted amino)-6-methyl-5-nitropyrimidine 1 with (L)-alpha-amino acids gave substituted derivatives 3, which were converted to optically active imidazo[1,2-a]pyrimidines 4 by treatment with either phosphorus oxychloride or polyphosphoric acid.
Synthesis of New Derivatives of 4-Methyl-3-nitro-6H-pyrimido[2,1-b]quinazoline
摘要:
-Various derivatives of 2-chloro-4-methyl-5-nitropyrimidine were synthesized by the reaction of 2,4-dichloro-6-methyl-5-nitro pyrimidine with amines. The synthesized derivatives were reacted with 2-aminobenzyl alcohol in m-xylene to obtain derivatives of a novel 4-methyl-3-nitro-6H-pyrimido[2,1-b]quinazoline heterocyclic system. The composition and structure of the products was confirmed by CHN analysis, IR, H-1 NMR, and C-13 NMR spectroscopy, and mass spectrometry.