caa a22 4500 467954593 CHVBK 20180405193745.0 cr unu---uuuuu 170328e20041001xx s 000 0 eng 10.1007/s10593-005-0007-9 doi (NATIONALLICENCE)springer-10.1007/s10593-005-0007-9 (NATIONALLICENCE)springer-10.1007/s10593-005-0060-4 Chemistry of acyl(imidoyl)ketenes. 8*. Thermolysis of 3-alkoxycarbonyl- 5-phenyl-1,2,4,5-tetrahydropyrrolo[1,2-a]- quinoxaline-1,2,4-triones. Structure of 2-(3-oxo-4-phenyl-3,4-dihydro-2-quinoxalinyl)- 2,4-di(ethoxycarbonyl)-6-phenyl-2,3,5,6-tetrahydro- 1h-pyrido[1,2-a]quinoxaline-1,3,5-trione [Elektronische Daten] [A. Maslivets, Z. Aliev, O. Krasnykh, O. Golovnina, L. Atovmyan] 3-Alkoxycarbonylmethylene-1-phenyl-1,2,3,4-tetrahydro-2-quinoxalones, obtained by the interaction of dialkyl esters of oxaloacetic acid and N-phenyl-o-phenylenediamine, react with oxalyl chloride with the formation of 3-alkoxycarbonyl-5-phenyl-1,2,4,5-tetrahydropyrrolo[1,2-a]quinoxaline-1,2,4-triones. Alkoxycarbonyl(2-oxo-1-phenyl-1,2-dihydro-3-quinoxalinyl)ketenes, generated on thermal decarbonylation of the latter, are stabilized by participation in a [4+2] cyclodimerization reaction with the formation of 2,4-di(alkoxycarbonyl)-2-(3-oxo-4-phenyl-3,4-dihydro-2-quinoxalinyl)-6-phenyl-2,3,5,6-tetrahydro-1H-pyrido[1,2-a]quinoxaline-1,3,5-triones. The crystal and molecular structure of the di(ethoxycarbonyl) derivative have been investigated by X-ray structural analysis. Springer Science+Business Media, Inc., 2004 alkoxycarbonyl(imidoyl)ketene nationallicence acyl(imidoyl)ketene nationallicence pyrroledione nationallicence crystal and molecular structure nationallicence [4 + 2] cyclodimerization nationallicence Maslivets A. Perm State University, 614000, Perm, Russia aut Aliev Z. Institute of the Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow region, Russia aut Krasnykh O. Perm State University, 614000, Perm, Russia aut Golovnina O. Perm State University, 614000, Perm, Russia aut Atovmyan L. Institute of the Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow region, Russia aut Chemistry of Heterocyclic Compounds Kluwer Academic Publishers-Consultants Bureau 40/10(2004-10-01), 1295-1299 0009-3122 40:10<1295 2004 40 10593 https://doi.org/10.1007/s10593-005-0007-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10593-005-0007-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Maslivets A. Perm State University, 614000, Perm, Russia aut NATIONALLICENCE 700 1- Aliev Z. Institute of the Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow region, Russia aut NATIONALLICENCE 700 1- Krasnykh O. Perm State University, 614000, Perm, Russia aut NATIONALLICENCE 700 1- Golovnina O. Perm State University, 614000, Perm, Russia aut NATIONALLICENCE 700 1- Atovmyan L. Institute of the Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow region, Russia aut NATIONALLICENCE 773 0- Chemistry of Heterocyclic Compounds Kluwer Academic Publishers-Consultants Bureau 40/10(2004-10-01), 1295-1299 0009-3122 40:10<1295 2004 40 10593 NATIONALLICENCE 856 40 https://doi.org/10.1007/s10593-005-0060-4 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer