作者:María E. Budén、Victoria A. Vaillard、Sandra E. Martin、Roberto A. Rossi
DOI:10.1021/jo9006249
日期:2009.6.19
The synthesis of a series of substituted 9H-carbazoles by the photostimulated SRN1 substitution reaction with diarylamines as starting substrate was performed. The diarylamines were obtained by two approaches, the Pd-catalyzed reactions (Buchwald−Hartwig) or Cu-catalyzed reactions of 2-haloanilines with aryl halides, or 2-bromoiodobenzene with anilines, with moderate to very good isolated yields (45−89%)
通过以二芳基胺为起始底物的光刺激的S RN 1取代反应进行一系列取代的9 H-咔唑的合成。二芳基胺是通过两种方法获得的,钯催化的2-卤代苯胺与芳基卤化物的反应或铜催化的2-卤代苯胺与芳基卤化物的反应或2-溴碘代苯与苯胺的反应,具有中等至非常好的分离产率(45-89% )。通过S RN 1机理通过二芳基胺的分子内CC键形成,可得到咔唑。这些反应在液氨和DMSO中以很高的合成率进行了很好的收率(81-99%)。N-(2-溴苯基)-2-苯基苯甲胺的反应得到1-苯基-9 H-咔唑(38%)和异构体9 H -tribenz [ b,d,f ]氮杂(58%)。通过使用该方法,通过与联苯胺的双重S RN 1反应,获得了9 H-咔唑,取代的9 H-咔唑,苯并咔唑,甚至3,3'-bi(9 H-咔唑)。