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An efficient sonochemical methodology is described for the synthesis of new podands containing substituted dihydropyrimidines. 相似文献
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Zhidovinova M. S. Fedorova O. V. Rusinov G. L. Ovchinnikova I. G. 《Russian Chemical Bulletin》2003,52(11):2527-2528
The ultrasound effect accelerates the Biginelli reaction 40 and more times. A sonochemical method for the synthesis of ethyl 4-R-6-methyl-2-oxo- and 4-R-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylates was developed. The target products were obtained within 2 to 5 min in 90—95% yields. 相似文献
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Fedorova O. V. Zhidovinova M. S. Rusinov G. L. Ovchinnikova I. G. 《Russian Chemical Bulletin》2003,52(8):1768-1769
The three-component synthesis of 7-substituted 6-ethoxycarbonyl-5-methyl-4,7-dihydroazolo[1,5-a]pyrimidines was carried out for the first time by the reactions of aminoazoles (3-aminopyrazole, 3-amino-1,2,4-triazole, or 5-aminotetrazole) with acetoacetic ester and aliphatic, aromatic, or heteroaromatic aldehyde. 相似文献
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