Inter- and intra-molecular aromatic N-substitution by arylnitrenium–aluminium chloride complexes generated from aryl azides in the presence of aluminium chloride
作者:Hiroshi Takeuchi、Munenori Maeda、Michiharu Mitani、Kikuhiko Koyama
DOI:10.1039/p19870000057
日期:——
benzene, toluene, ethylbenzene, cumene, anisole, and bromobenzene) in the presence of AlCl3 gave diarylamines, whereas those of phenyl azides with an electron-donating group such as Me and OMe yield little of the corresponding diarylamines (tar formation takes place). The reaction of 4-nitrophenyl azide with benzene in the presence of AlCl3 gave 4-nitrophenyl(phenyl)amine and a C-substitution product,
在AlCl 3存在下,叠氮化苯与芳族化合物(即苯,甲苯,乙苯,枯烯,苯甲醚和溴苯)的反应生成二芳基胺,而带有给电子基团(例如Me和OMe)的叠氮化苯的反应很少相应的二芳基胺(发生焦油形成)。4-硝基苯基叠氮化物与苯在AlCl 3存在下的反应得到4-硝基苯基(苯基)胺和C-取代产物2-氨基-5-硝基联苯。在AlCl 3存在下,在CH 2 Cl 2中分解2-叠氮基苯基(苯基)甲烷和2-叠氮基联苯进行N-环化,分别以良好收率得到9,10-二氢ac啶和咔唑。关于二芳基胺的形成芳基叠氮化物和哈米特图(与ρ-6.0)的分解动力学数据表明,产品是由芳香族形成Ñ arylnitrenium-的AlCl的3'-取代3个络合物经由叠氮化物的AlCl 3的络合物。我们进一步论证了芳基氮化物-AlCl 3配合物的特性。