Pyrrolo(1',2':1,2)pyrazino(6,5-b)carbazoles.
作者:JEAN-CHARLES LANCELOT、JEAN-MARIE GAZENGEL、SYLVAIN RAULT、MAX ROBBA
DOI:10.1248/cpb.31.45
日期:——
The synthesis of the new heterocycles pyrrolo [1', 2' : 1, 2] pyrazino [6, 5-b] carbazoles was achieved by the intramolecular cyclisation of 2-(1-pyrrolyl) carbazole derivatives. These latter compounds were obtained by the Clauson-Kaas reaction starting from the corresponding 2-aminocarbazoles, obtained by reduction of 2-nitrocarbazoles. A study of this reduction has shown that the introduction of acetyl grouping in position 9 makes this reaction easier and gives better results than previous methods. 1H-NMR spectra are studied.
新杂环吡咯 [1', 2' : 1, 2] 吡嗪并 [6, 5-b] 咔唑的合成是通过 2-(1-吡咯基) 咔唑衍生物的分子内环化反应实现的。后一种化合物是通过克劳森-卡斯反应从相应的 2-氨基咔唑(由 2-硝基咔唑还原而成)获得的。对该还原反应的研究表明,在第 9 位引入乙酰基使该反应更容易进行,并比以前的方法得到更好的结果。对 1H-NMR 光谱进行了研究。