Formation, structure and heterocyclization of aminoguanidine and ethyl acetoacetate condensation products
作者:A. V. Erkin、V. I. Krutikov
DOI:10.1134/s1070363209060309
日期:2009.6
Condensation of aminoguanidine hydrochloride and ethylacetoacetate results in 2,3-diamino-6-methylpyrimidin-4(3H)-one, 5-hydroxy-1-carboxamidino-3-methylpyrazole or ethyl N-[(5-hydroxy-3-methylpyrazol-1-yl)imidoyl]aminocrotonoate depending on the type of the base. Formation of pyrazole derivatives occurs in the case of dequaternized substrate imine-group protonating by the acids formed as a result