Regioselective intramolecular annulations of ambident β-enamino esters: A diversity-oriented synthesis of nitrogen-containing privileged molecules
作者:Srinivasarao Yaragorla、Abhishek Pareek
DOI:10.1016/j.tetlet.2018.01.064
日期:2018.3
intramolecular annulation of β-enamino esters is described under solvent-free, calcium-catalysis. 2-aminoaryl ketones and alkyl propiolates undergone a [4+2] annulation to yield substituted quinolines; with an excess of alkyl propiolates, benzodiazepines were formed via a [4+2+1] annulation. We also described a one-pot, 3-component synthesis of quinoline derivatives via a [4+2+2] annulation. Interestingly
在无溶剂的钙催化下描述了多样性导向的区域选择性β-烯氨基酯的分子内环化反应。对2-氨基芳基酮和丙酸烷基酯进行[4 + 2]环化,生成取代的喹啉;与过量的丙酸烷基酯一起,通过[4 + 2 + 1]环化形成苯并二氮杂。我们还描述了通过[4 + 2 + 2]环化法一锅,三组分合成喹啉衍生物。有趣的是,2-氨基芳基酮会发生自缩合[4 + 4],生成二苯并重氮电影。