Fast Synthesis of Hydrazine and Azo Derivatives by Oxidation of Rare-Earth-Metal−Nitrogen Bonds
作者:Lijun Zhang、Jing Xia、Qinghai Li、Xihong Li、Shaowu Wang
DOI:10.1021/om1009928
日期:2011.2.14
A novel N−N coupling reaction was developed through the oxidation of rare-earth-metal−nitrogen bonds produced by treatment of the easily available rare-earth-metal amides [(Me3Si)2N]3RE(μ-Cl)Li(THF)3 with aromatic primary or secondary amines. The reaction provides the symmetrical or unsymmetrical azo compounds and hydrazinederivatives in good to high yields within a very short time under mild conditions
Excited-State Mixed-Valence Distortions in a Diisopropyl Diphenyl Hydrazine Cation
作者:Jenny V. Lockard、Jeffrey I. Zink、Yun Luo、Michael N. Weaver、Asgeir E. Konradsson、Joseph W. Fowble、Stephen F. Nelsen
DOI:10.1021/ja0609093
日期:2006.12.1
employed to interpret the absorption spectrum and coupling. ResonanceRaman spectroscopy is used to determine the excited-state distortions. The frequencies of the enhanced modes from the resonanceRaman spectra are used together with the time-dependent theory of spectroscopy to fit the two observed absorption bands that have resolved vibronic structure. The origins of the vibronic structure and relationships
An efficient protocol for the synthesis of a variety of azobenzenes and hydrazines from aromatic amines under mild reaction conditions is developed using Cu(I) catalyst. The copper cataylst used in this study comprises of CuBr, DMAP and AIBN. The plausible proposed mechanism for this dehydrogenative homo coupling of aromatic amines is depicted. (C) 2014 Elsevier B.V. All rights reserved.
Gilman; Pickens, Journal of the American Chemical Society, 1925, vol. 47, p. 2408