Polyfunctional nitriles in the synthesis of derivatives of 1,3,4-thiadiazolo-[3,2-a]pyrimidines
作者:M. A. Kukaniev、M. D. Osimov、Z. G. Sangov、S. S. Safarov、M. B. Karimov、T. R. Radjabov
DOI:10.1007/s10593-008-0125-2
日期:2008.7
A one-pot method has been developed for the synthesis of 2-R-7-methyl-5-oxo-5H-1,3,4-thia-diazolo[3,2-a]pyrimidine by condensation of beta-alkylthio(alkoxy)propionitrile, thiosemicarbazide, and ethyl acetoacetate in PPA, and also (7-methyl-5-oxo-5H-1,3,4-thidiazolo[3,2-a]pyrimidin-2-yl)-acetamide from cyanoacetamide, thiosemicarbazide, and ethyl acetoacetate.