• Title/Summary/Keyword: Pyridazino[3,4-b]quinoxaline

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Synthesis of Novel 1,2-Diazepino[3,4-b]quinoxaline and Pyridazino[3,4-b]quinoxaline Derivatives (새로운 1,2-Diazepino[3,4-b]quinoxaline과 Pyridazino[3,4-b]quinoxaline)

  • Kim, Ho Sik;Jeong, Geuk
    • Journal of the Korean Chemical Society
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    • v.43 no.3
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    • pp.302-306
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    • 1999

  • The 1,3-dipolar cycloaddition reaction of the quinoxaline 4-oxide 10 with 2-chloroacrylonitrile gave the 2,3-dihydro-lH-1,2-diazepino[3,4-blquinoxalines lla, b, respectively, which were converted into the 2,3,4,6-tetrahydro-lH-l,2-diazepino[3,4-b]quinoxaline 12. The reaction of compound lla with selenium dioxide in acetic acid/water resulted in ring transformation to give the 1,4-dihydro-4-oxopyridazino[3,4-blquinoxaline 13.

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Synthesis of Novel 1,2-Diazepino[3,4-b] quinoxalines and pyridazino[3,4-b] quinoxalines (새로운 1,2-다이아제피노 [3,4-b]퀴녹살린류와 피리다지노 [3,4-b] 퀴녹살린류의 합성)

  • Kim, Ho-Sik;Lee, Seong-Uk;Jeong, Geuk;Lee, Man-Kil;Kurasawa, Yoshihisa
    • YAKHAK HOEJI
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    • v.44 no.4
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    • pp.325-333
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    • 2000

  • The 1,3-dipolar cycloaddition reaction of the quinoxaline 4-oxides 2 with 2-chloroacrylonitrile gave the 2,3-dihydro-1H-1,2-diazepino[3,4-b]quinoxalines 3, which were converted into the 2,3,4,6-tetrahydro-1H-1,2-diazepino[3,4-b]quinoxalines 5-7. The reaction of compounds 3 with selenium dioxide in acetic acid/water resulted in ring transformation to give the 1,4-dihydro-4-oxopyridazino[3,4-b]quinoxalines 8.

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