Reaction behaviour of arylamines with nitroalkenes in the presence of bismuth(<scp>iii</scp>) triflate: an easy access to 2,3-dialkylquinolines
作者:Saghir Ali、Radhakrishna Gattu、Varun Singh、Santa Mondal、Abu T. Khan、Gurudutt Dubey、P. V. Bharatam
DOI:10.1039/c9ob02214g
日期:——
We report the reaction behaviour of arylamines with nitroalkenes in the presence of bismuth(iii) triflate (10 mol%) and diacetoxyiodobenzene (10 mol%). We obtained 2,3-dialkylquinoline derivatives instead of the expected 3-alkylindole derivatives. The present reaction is an alternative approach for the synthesis of 2,3-dialkylquinoline derivatives under milder conditions. Furthermore, we establish
我们报告了在三氟甲磺酸铋(iii)(10 mol%)和二乙酰氧基碘苯(10 mol%)存在下芳基胺与硝基烯烃的反应行为。我们获得了2,3-二烷基喹啉衍生物,而不是预期的3-烷基吲哚衍生物。本反应是在较温和的条件下合成2,3-二烷基喹啉衍生物的另一种方法。此外,我们使用高斯09软件[B3LYP / 6-311 + G(d,p)]通过理论计算建立了机理途径,表明传统的氮杂-迈克尔反应比迈克尔加成反应更可取。脂肪族硝基烯烃的行为与芳香族硝基烯烃不同。氮杂-迈克尔加合物通过消除水而生成亚胺,水可能互变为相应的烯胺。所得的亚胺和烯胺中间体一起反应,得到所需的喹啉衍生物。该方案的优点是连续形成一个CN和两个CC键,区域选择性高,底物范围宽和产率高。