Synthesis and characterization of propeller-shaped mono- to hexacationic quinolinium-substituted benzenes
作者:Sviatoslav Batsyts、Eike G. Hübner、Jan C. Namyslo、Mimoza Gjikaj、Andreas Schmidt
DOI:10.1039/c9ob00357f
日期:——
and -4-yl)benzenes. Restricted rotation of the 3-yl and 4-yl substituted derivatives is observed between the central core and the substituents, resulting in propeller-shaped molecules. Likewise, 1,2-diquinolinyl-3,4,5,6-tetraphenylbenzenes with 3-yl,3-yl and 3-yl,4-yl connectivity were prepared. As evidenced by NMR spectroscopy, they form two diasteromers due to their restricted rotation. A cobalt-catalyzed
2-,3-和4-(苯基乙炔基)喹啉与四苯基环戊二烯酮的狄尔斯-阿尔德反应产生了三个区域异构体2,3,4,5,6-五苯基-1-(喹啉-2-基,-3-基和- 4-基)苯。在中心核和取代基之间观察到3-基和4-基取代的衍生物的旋转受限,从而产生了螺旋桨状的分子。同样,制备了具有3-基,3-基和3-基,4-基连接性的1,2-二喹啉基-3,4,5,6-四苯基苯。NMR光谱证明,由于旋转受限,它们形成了两个非对映异构体。钴催化的2-(苯基乙炔基)喹啉的[2 + 2 + 2]-环三聚反应导致形成三苯基-2,4,6-和-3,5,6-三(喹啉-2-基)苯。将相同的反应应用于形成六(喹啉-3-基)苯的3,3'-乙炔-1,2-二基二喹啉。ñ-甲基化得到标题化合物。其中,描述了六阳离子六(N-甲基喹啉基-3-基)苯。立体化学方面主要通过NMR实验的结果来讨论。已对六价阳离子及其中性前体的最稳定构象和前沿轨道轮廓进行了DFT计算。