Efficient Synthesis of Dialkyl (2Z)-2-[(E)-1-Aryl-2-(3-arylquinoxalin-2-yl)ethenyl]but-2-enedioates
作者:Issa Yavari、Anvar Mirzaei、Loghman Moradi
DOI:10.1002/hlca.200690253
日期:2006.11
The reaction of dialkyl acetylenedicarboxylates 4 with 1-aryl-2-[(3-arylquinoxalin-2(1H)-ylidene)ethanones 3 in the presence of Ph3P leads to dialkyl (2Z)-2-[(E)-1-aryl-2-(3-arylquinoxalin-2-yl)ethenyl]but-2-enedioates 1 in good yields.
Synthesis of 2-(<i>p</i>-R-benzoylmethylene)-3-(<i>p</i>-R-phenyl)-1<i>H</i>-quinoxalines
作者:Braulio Insuasty、Fernando Fernéandez、Jairo Quiroga、Rodolfo Moreno、Roberto Martinez、Enrique Angeles、Rubéan Gaviñto、Regina H. S. De Almeida
DOI:10.1002/jhet.5570350432
日期:1998.7
The reaction of 1,2-diaminobenzenes with substituted 1,2-dibenzoyl-1,2-dibromoethanes constitutes a convenient synthetic route to the hitherto 2-(p-R-benzoylmethylene)-3-(p-R-phenyl)-1H-quinoxalines. Structures of all products were elucidated by ir, 1H and 13C-nmr, mass spectra data. X-Ray crystallography data confirm assigned structures.
Opening of the Furandione Ring with o-Aminothiophenol: Synthesis of 2H-1,4-Benzothiazine-2,3(4H)-dione
作者:N. A. Tretyakov、M. V. Dmitriev、A. B. Shein、A. N. Maslivets
DOI:10.1134/s107042801905021x
日期:2019.5
5-Aryl-4-(3-arylquinoxalin-2-yl)furan-2,3-diones react with o-aminothiophenol to form 2H-1,4-benzothiazin-2,3-(4H)-dione and (2Z)-1-aryl-2-[3-arylquinoxalin-2(1H)-ylidene]ethan-1-ones.
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作者:A. N. Maslivets、N. Yu. Lisovenko、O. P. Krasnykh、O. P. Tarasova、Z. G. Aliev、L. O. Atovmyan
DOI:10.1023/a:1016097120253
日期:——
3-Aryl-Z-2-aroylmethylidene-1,2-dihydroquinoxalines react with oxalyl chloride to form 3-aryl-2-(2-aryl-4,5-dioxo-4,5-dihydro-3-furyl)quinoxalines, whose thermal decarbonylation generate 5-aryl-2-3(arylquinoxalin-2-yl)-4-aroyl-3-aroyloxy-1H-pyrido[1,2-a]quinoxalin-1-ones. The crystal and molecular structures of one of them (Ar = Ph) were established by X-ray diffraction analysis.