作者:V. A. Ozeryanskii、A. F. Pozharskii、A. M. Fomchenkov
DOI:10.1007/bf02498957
日期:1998.2
First indirect evidence for the formation of a radical cation of 1,8-bis(dimethylamino)naphthalene (“protonsponge”) in reactions with HNO3, HNO2, NO2, and I2 has been obtained. In all cases, the products of reaction of the radical cation with nucleophiles and/or its dimer, 4,5,4′,5′-tetrakis(dimethylamino)-1,1′-binaphthyl, have been isolated. 4-Chloro-1,8-bis(dimethylamino)naphthalene has been regioselectively
1,8-Bis(diphenylmethylium)naphthalenediyl Dication as an Organic Oxidant: Synthesis of Benzidines via Self-Coupling of <i>N,N</i>-Dialkylanilines
作者:Terunobu Saitoh、Suguru Yoshida、Junji Ichikawa
DOI:10.1021/ol048058w
日期:2004.11.1
1,8-Bis(diphenylmethylium)naphthalenediyl dications promoted oxidative coupling of various N,N-dialkylanilines to afford the corresponding para-coupled bisanilines, benzidines, in good to excellent yield. The dications were readily prepared from a cyclic ether precursor, derived from 1,8-dibromonaphthalene, via deoxygenation with a silylating reagent in 1,1,1,3,3,3-hexafluoro-2-propanol under anhydrous conditions.
Naphthalene-1,8-diylbis(diphenylmethylium) as an Organic Two-Electron Oxidant: Benzidine Synthesis via Oxidative Self-Coupling of <i>N,N</i>-Dialkylanilines
作者:Terunobu Saitoh、Suguru Yoshida、Junji Ichikawa
DOI:10.1021/jo060662s
日期:2006.8.1
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 paraposition to afford the corresponding benzidines in good to excellent yield.
peri-Naphthylenediamines
作者:N. V. Vistorobskii、A. F. Pozharskii、M. I. Rudnev
DOI:10.1007/bf02495514
日期:1998.1
at low temperatures. Treatment of the reaction product with excess Li and then with O2 gave, depending on the reaction temperature, perylene or 4,4′-bis(dimethylamino)-1,1′-binaphthalene in good yields, instead of expected 3,4,9,10-tetrakis(dimethyl-amino)perylene.