4‘-diamine 2g shows significant differences in the torsion angle between the naphthalene moieties depending on its oxidation state. Twisted structures are preferred for neutral compounds, whereas more planar are favored for the oxidized forms 2g•+ and 2g2.2+ to realize spin and/or charge delocalizations over the whole π-system. Such conformation changes concerted with the electron transfers contribute to explain
Iron(III)-Promoted Oxidative Coupling of Naphthylamines: Synthetic and Mechanistic Investigations
作者:Xin-Le Li、Jin-Hua Huang、Lian-Ming Yang
DOI:10.1021/ol202058r
日期:2011.9.16
A facile route to the synthesis of 1,1'-binaphthyl-4,4'-diamines (naphthidines) and 1,1'-binaphthyl-2,2'-diamines (BINAMs) was developed by the oxidative homocoupling of 1- and 2-naphthylamines, respectively, using FeCl(3) as oxidant and K(2)CO(3) as base in 1,2-dichloroethane under ambient conditions. A preliminary mechanistic investigation was performed by the ESR spectroscopy and intermediate-trapping technique.
Oxidative Biaryl Coupling of N-Aryl Anilines by Using a Hypervalent Iodine(III) Reagent
作者:Koji Morimoto、Doichi Koseki、Toshifumi Dohi、Yasuyuki Kita
DOI:10.1055/s-0036-1590875
日期:2017.12
it is desirable to develop a general and mild synthetic approach to diverse biaryl diamines. Oxidativecoupling is an efficient and promising strategy for the synthesis of these targets. We have now developed a direct formation of biaryl diamines by oxidativecoupling using a hypervalent iodine(III) reagent.