1-Amino-2-nitroguanidine in reactions with α-ketocarboxylic acids
作者:Olga Yu. Ozerova、Tatiana P. Efimova、Tamara A. Novikova
DOI:10.1007/s10593-020-02649-w
日期:2020.2
The reactions of 1-amino-2-nitroguanidine with α-ketocarboxylic acids gave substituted hydrazones of α-ketocarboxylic acids, the cyclization of which depended on the geometry of the azomethine moiety. It was established that the obtained hydrazones were able to form a 1,2,4-triazine system in the case when the hydrazone of its linear precursor existed in the form of Z(syn)-isomer. Thus, the phenylglyoxalic