3-Phenacyl-2-quinoxalones and 3-phenacylidene-3,4-dihydro-2-quinoxalones

Autor:	G. D. Plakhina, V. L. Gein, L. A. Voronova, R. F. Saraeva, S. G. Pitirimova, Yu. S. Andreichikov
Rok vydání:	1978
Předmět:	chemistry.chemical_compound Ultraviolet visible spectroscopy chemistry Stereochemistry Organic Chemistry Atom Substituent Ionic bonding Phenacyl Medicinal chemistry
Zdroj:	Chemistry of Heterocyclic Compounds. 14:336-339
ISSN:	1573-8353 0009-3122
Popis:	A number of 2-quinoxalone derivatives were synthesized by reaction of aroylpyruvic acid esters with o-phenylenediamine. It was established by IR and UV spectroscopy that compounds with a substituent attached to the α-carbon atom of the phenacyl group exist in the 3-phenacyl-2-quinoxalone form, whereas unsubstituted 2-quinoxalones have a 3-phenacylidene-3, 4-dihydro-2-quinoxalone structure. A relationship between the spectral shifts of the long-wave maximum and the σ+ para substituent constants on passing from the molecular forms to the ionic forms of 3-phenacylidene-3,4-dihydro-2-quinoxalones was established.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::919939bd589d98f2aaa8ff14167b3aa0 https://doi.org/10.1007/bf00470572 Zobrazit plný text záznamu Full text from SpringerLink