G 33 Gein, V. L. A novel four-component synthesis of ethyl 6-amino-4-aryl-5-cyano-2,4-dihydropyrano[2,3-c]pyrazole-3-carboxylates [Electronic resource] / V. L. Gein, T. M. Zamaraeva, P. A. Slepukhin. - [Б. м. : б. и.]. - Bibliogr. : p. 4528 (26 ref.). - Б. ц. Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): MULTICOMPONENT REACTION -- AROMATIC ALDEHYDES -- SODIUM DIETHYLOXALOACETATE Аннотация: Ethyl 6-amino-4-aryl-5-cyano-2,4-dihydropyrano[2,3-с]pyrazole-3-carboxylates were synthesized via a four-component reaction of the sodium salt of diethyloxaloacetate, an aromatic aldehyde, hydrazine hydrate, and malononitrile. The products were obtained in moderate to high yields. \\\\expert2\\nbo\\Tetrahedron Letters\\2014, v. 55, p. 4525.pdf |