作者:Rita Vaickelioniene、Vytautas Mickevicius、Gema Mikulskiene
DOI:10.3390/10020407
日期:——
A series of 1-aryl substituted dihydro-, 5-methyldihydro- and 6-methyl-dihydro-2,4(1H,3H)pyrimidinediones and their 2-thio analogues were obtained byreaction of the corresponding β-alanines or α-methyl- and β-methyl-β-alanines with ureaor potassium thiocyanate. The reaction of N-(2,3- and 3,5-dimethylphenyl)-α-methyl-β-alanines with ethyl acetoacetate gave 1-(2,3- or 3,5-dimethylphenyl)-2,5-dimethyl-1,4,5,6-tetrahydro-4(1H)pyridones. The combined spectral data obtained by 1H-, 13C-,1 H/13C (HETCOR) NMR and IR provided useful information about the structure of theproducts synthesized in this work.
通过将相应的β-丙氨酸或α-甲基-和β-甲基-β-丙氨酸与尿素或氰氢钾反应,得到了一系列1-芳基取代的二氢、5-甲基二氢和6-甲基二氢-2,4(1H,3H)嘧啶二酮及其2-硫代类似物。N-(2,3-和3,5-二甲基苯基)-α-甲基-β-丙氨酸与乙酰乙酸乙酯的反应生成了1-(2,3-或3,5-二甲基苯基)-2,5-二甲基-1,4,5,6-四氢-4(1H)吡啶酮。通过1H、13C、1H/13C (HETCOR) NMR和红外光谱获得的组合光谱数据为本研究中合成产品的结构提供了有益的资料。