| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| 乙基4-乙基-6-甲基-2-氧代-1,2,3,4-四氢-5-嘧啶羧酸酯 | 5-ethoxycarbonyl-4-ethyl-6-methyl-3,4-dihydro-pyrimidin-2(1H)-one | 17994-57-9 | C10H16N2O3 | 212.249 |
4-Alkyl-3,4-dihydropyrimidin-2(1 H)-ones possess a number of important properties in comparison with their 4-aryl analogues. We show that these compounds can be synthesised by a simple one-pot reaction of urea or thiourea, different aliphatic aldehydes (from acetaldehyde to valeraldehyde) and various dicarbonyl compounds (ethyl acetoac-etate, pentane-2,4-dione, N-(4-chlorophenyl)-3-oxobutanamide, acetoacetaldehyde dimethylacetal) in refluxing DMF or HOAc without use of any catalyst. The methylation of 4-alkyl-5-C(O)R-3,4-dihydropyrimidin-2(1 H)-ones leads to 1-methyl derivatives.