Naphthalene-1,8-diylbis(diphenylmethylium) as an Organic Two-Electron Oxidant:  Benzidine Synthesis via Oxidative Self-Coupling of N,N-Dialkylanilines

Naphthalene-1,8-diylbis(diphenylmethylium) exhibits a unique electron-transfer reduction behavior due to the close proximity of the two triarylmethyl cations, which form a C−C bond while accepting two electrons, leading to 1,1,2,2-tetraphenylacenaphthene. The preparation of the dication was readily...

Full description

Saved in:
Bibliographic Details
Published in:Journal of organic chemistry 2006-08, Vol.71 (17), p.6414-6419
Main Authors: Saitoh, Terunobu, Yoshida, Suguru, Ichikawa, Junji
Format: Article
Language:English
Subjects:
Chemistry
Condensed benzenic and aromatic compounds
Exact sciences and technology
Organic chemistry
Preparations and properties
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Naphthalene-1,8-diylbis(diphenylmethylium) exhibits a unique electron-transfer reduction behavior due to the close proximity of the two triarylmethyl cations, which form a C−C bond while accepting two electrons, leading to 1,1,2,2-tetraphenylacenaphthene. The preparation of the dication was readily accomplished under anhydrous conditions starting from a cyclic bis(triarylmethyl) ether, derived from 1,8-dibromonaphthalene. The process proceeded via deoxygenation accompanying the formation of a disiloxane on treatment with a silylating agent (Me3SiClO4 or Me3SiOTf) in 1,1,1,3,3,3-hexafluoropropan-2-ol. The dication was successfully employed for oxidative coupling of N,N-dialkylanilines at the para-position to afford the corresponding benzidines in good to excellent yield.
ISSN:0022-3263
1520-6904
DOI:10.1021/jo060662s