Reactions of 9-Alkyl-3-aminocarbazoles with Ethyl-3-oxo-butanoate and Identification of the Products Obtained
作者:Birute Sapijanskaite、Ytautas Mickevicius、Gema Mikulskiene
DOI:10.3390/11010072
日期:——
The reactions in benzene of 9-alkyl-3-aminocarbazoles with ethyl-3-oxobutanoateyielded ethyl-3-[(9-alkyl-9H-carbazol-3-yl)amino]but-2-enoate condensation products or N-(9-ethyl-9H-carbazol-3-yl)-3-oxobutanamide acylation products. The condensation productswere cyclized to the corresponding 4,7-dihydro-pyrido[2,3-c]-carbazol-1-ones upon heatingin mineral oil at 240-250 °C. The structures of the synthesized compounds were investigatedby IR, mass spectrometry, 1H- and 13C-NMR spectroscopy and MM2 molecular mechanicsand AM1 semi-empirical quantum mechanical methods.
9-烷基-3-氨基卡巴佐尔与乙基-3-氧代丁酸酯在苯中反应生成了乙基-3-[(9-烷基-9H-卡巴佐尔-3-基)氨基]丁-2-烯酸酯冷凝产物或N-(9-乙基-9H-卡巴佐尔-3-基)-3-氧代丁酰胺酰化产物。冷凝产物在240-250°C的矿物油中加热环化生成相应的4,7-二氢-吡啶[2,3-c]-卡巴佐尔-1-酮。合成化合物的结构通过红外光谱、质谱、1H及13C核磁共振光谱以及MM2分子力学和AM1半经验量子力学方法进行了研究。