A metal‐free deoxygenation and reductive disilylation of nitroarenes was achieved using N,N′‐bis(trimethylsilyl)‐4,4′‐bipyridinylidene (1) under mild and neutral reaction conditions, and a broad functional group tolerance was possible in this reaction. Mono‐deoxygenation, giving a synthetically valuable N,O‐bis(trimethylsilyl)phenylhydroxylamine (7 a) as a readily available and safe phenylnitrene source
使用N,N'-双(三甲基甲硅烷基)-4,4'-联吡啶亚烷基(1)在温和和中性的反应条件下实现了硝基芳烃的无金属脱氧和还原二甲硅烷基化反应,并且该反应可能具有广泛的官能团耐受性。单脱氧可得到合成上有价值的N,O-双(三甲基甲硅烷基)苯羟胺(7 a),是一种容易获得且安全的硝基苯来源的苯基亚硝酸,双脱氧可得到N,N-双(三甲基硅烷基)苯胺8。改变1的量很容易控制反应温度以及加入二苯并噻吩(DBTP)。2-芳基硝基苯与1的反应通过N,O-双(三甲基甲硅烷基)苯基羟胺7的热解衍生的原位生成的亚苯基硝基苯胺生成相应的咔唑14,随后将其插入分子内CH。此外,分子内的N-N偶联反应将2,2'-二硝基联苯衍生物还原1,得到相应的苯并[ c ]喹啉。
Aryl nitrenes from N,N′-diarylbenzoquinone di-imine N,N′-dioxides and N-arylbenzoquinone imine N-oxides
作者:Alexander R. Forrester、Munro M. Ogilvy、Ronald H. Thomson
DOI:10.1039/p19820002023
日期:——
Photolyses of the title quinoneimineN-oxides give mainly azoarenes formed by dimerisation of triplet aryl nitrenes.
4,4′-Bipyridyl-Catalyzed Reduction of Nitroarenes by Bis(neopentylglycolato)diboron
作者:Hiromu Hosoya、Luis C. Misal Castro、Ibrahim Sultan、Yumiko Nakajima、Toshimichi Ohmura、Kazuhiko Sato、Hayato Tsurugi、Michinori Suginome、Kazushi Mashima
DOI:10.1021/acs.orglett.9b03419
日期:2019.12.20
4,4'-Bipyridyl worked as an organocatalyst for the reduction of nitroarenes by bis(neopentylglycolato)diboron (B2nep2), followed by hydrolysis to give the corresponding anilines. This reduction proceeded under aerobic conditions without any prepurification of substrates and reagents. We found broad functional group tolerance and compatibility for O- and N-protecting groups under the reaction conditions
Photochemistry of phenyl azide: chemical properties of the transient intermediates
作者:Alan K. Schrock、Gary B. Schuster
DOI:10.1021/ja00330a032
日期:1984.9
La photochimie du phenylazide est examinee par photolyse eclair-laser dans des solvants inertes et reactifs. Mise en evidence de phenylnitrene triplet comme intermediaire. Structure de cet intermediaire et etude de ses reactions avec lesaminessecondaires
La photochimie du phenylazide est 考生 par photolyse eclair-laser dans des solvants inertes et reactifs。Mise en evidence de phenylnitrene 三联体 comme intermediaire。Structure de cet intermediaire 练习曲练习曲 de ses 反应 avec les amines secondaires
Evidence for stepwise nitrogen extrusion and ring expansion upon photolysis of phenyl azide
作者:Andrzej Marcinek、Elisa Leyva、David Whitt、Matthew S. Platz
DOI:10.1021/ja00072a013
日期:1993.9
of the products formed on photolysis of two independent precursors of phenylnitrene has been studied. The identity of the product-forming intermediates (triplet phenylnitrene versus ketene imine) produced on photolysis of phenyl azide and benzenesulfoximine in the presence of diethylamine show the same qualitative variation with temperature. An excited state of the nitrene precursor is not responsible