期刊
JOURNAL OF COMBINATORIAL CHEMISTRY
卷 9, 期 2, 页码 275-284出版社
AMER CHEMICAL SOC
DOI: 10.1021/cc0601377
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An efficient and rapid microwave-assisted solution-phase method for the synthesis of 2-amino-4-arylpyrimidine-5-carboxylic acid derivatives has been developed. The five-step linear protocol involves an initial Biginelli multicomponent reaction leading to dihydropyrimidine-2-thiones which are subsequently S-alkylated with methyl iodide. The resulting 2-methylthiodihydropyrimidines are sequentially oxidized first with manganese dioxide and then with Oxone to provide 2-methylsulfonyl-pyrimidines which serve as excellent precursors for the generation of a variety of 2-substituted pyrimidines via displacement of the reactive sulfonyl group with nitrogen, oxygen, sulfur, and carbon nucleophiles. A modified protocol using a solid-phase method has also been developed.
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