Tetracyclic Heteroaromatic Systems-Synthesis of Ethoxycarbonylphenylpyrido[3',2':5,6] Thiopyranoquinolines

M. N. Khan, M. Khan, Noreen Aslam, Pir Bakhsh Khan, E. Haq
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Abstract

7-benzylideneamino-5H-thiochromeno[2,3-b]pyridin-5-ones and 9-benzylideneamino-5H-thio- chromeno[2,3-b]pyridin-5-ones, on reaction with ethyl pyruvate to afford 1-ethoxycarbonyl-3-phenyl-12H- pyrido[3',2':5,6]thiopyrano[3,2-f]quinoline-12-ones and 4-ethoxycarbonyl-2-phenyl-7H- pyrido[3',2':5,6]thiopyrano[3,2-h]quinoline-7-ones respectively by the two different methods. These products were precipitated by addition of ethanol, water (1:1), were purified by recrystalizing from appropriate solvents and were characterized from their IR, 1H-NMR, mass spectra and elemental analysis data.  
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四环杂芳体系-乙氧羰基苯基吡啶[3',2':5,6]硫代吡喃喹啉的合成
7-苄基氨基- 5h -硫代氨基[2,3-b]吡啶-5-酮和9-苄基氨基- 5h -硫代氨基[2,3-b]吡啶-5-酮与丙酮酸乙酯反应,分别得到1-乙氧羰基-3-苯基- 12h -吡啶[3′,2′:5,6]硫代氨基[3,2-f]喹啉-12-酮和4-乙氧羰基-2-苯基- 7h -吡啶[3′,2′:5,6]硫代氨基[3,2-h]喹啉-7-酮。用乙醇和水(1:1)沉淀,用合适的溶剂重结晶纯化,并用IR、1H-NMR、质谱和元素分析数据对产物进行了表征。
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