Synthesis of Imidazo[1′,5′:1,2]pyrido[3,4-b]indole Derivatives

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作者
Magdolna Solymár
Márta Palkó
Tamás Martinek
Ferenc Fülöp
机构
[1] Institute of Pharmaceutical Chemistry,
[2] University of Szeged,undefined
[3] H-6701 Szeged,undefined
[4] Hungary,undefined
关键词
Keywords. β-Carbolines; Hydantoins; Thiohydantoins; Keto-enol tautomerism.;
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摘要
 The reactions of 1,2,3,4-tetrahydro-β-carboline-1-carboxylic acid and its ethyl ester with alkyl and aryl isothiocyanates under mild conditions resulted in the corresponding thiohydantoin-fused tetrahydro-β-carbolines. Treatment of the ethyl ester with isocyanates furnished ethyl 2-alkyl- or arylcarbamoyl-1,2,3,4-tetrahydro-β-carboline-1-carboxylates which were transformed to hydantoin-fused tetrahydro-β-carbolines. The structures of the thiohydantoin compounds, involving two conformers and the presence of keto-enol tautomerism, were determined by NMR spectroscopy.
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页码:1423 / 1430
页数:7
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