Limaye et al., Journal of the University of Bombay, Science: Physical Sciences, Mathematics, Biological Sciences and Medicine, 1952, vol. 21/3 A, p. 42,44
Alkylation of nitroarenes with Grignard reagents via oxidative nucleophilic substitution of hydrogen
作者:Mieczysław Mąkosza、Marek Surowiec
DOI:10.1016/s0022-328x(00)00931-1
日期:2001.4
Alkylation of nitroarenes with Grignard reagents via oxidative nucleophilic substitution of hydrogen (ONSH) can be efficiently executed with potasium permanganate in liquid ammonia as an oxidative system for the σH adducts. The addition of RMgX to ArNO2 of stoichiometry 1:1 is accompanied with a redoxprocess apparently of stoichiometry 2:1. Because of that, real stoichiometry of the reactionbetween nitroarenes
sphinomethyl)cyclopentane as a catalyst, a range of aryl bromides and chlorides undergoes Suzuki cross-coupling with alkylboronic acids in good yields. Several alkyl substituents such as ethyl, n-butyl, n-octyl, isobutyl or 2,2-dimethylpropyl on the alkylboronic acids have been successfully used. The functional group tolerance on the arylhalide is remarkable; substituents such as fluoro, methyl, methoxy
通过使用[PdCl(C 3 H 5)] 2 /顺式,顺式,顺式-1,2,3,4-四(二苯基膦甲基)环戊烷作为催化剂,一系列芳基溴化物和氯化物进行铃木交叉偶联与烷基硼酸的收率很好。几个烷基取代基,例如乙基,正丁基,n已经成功地使用了烷基硼酸上的-辛基,异丁基或2,2-二甲基丙基。芳基卤对官能团的耐受性显着;可以容忍诸如氟,甲基,甲氧基,乙酰基,甲酰基,苯甲酰基,硝基或腈之类的取代基。此外,该催化剂即使在位阻芳基溴的反应中也可以低负荷使用。
Regioselective Nitration of Aromatic Hydrocarbons by Metallic Nitrates on the K10 Montmorillonite under Menke Conditions
作者:Pierre Laszlo、Joseph Vandormael
DOI:10.1246/cl.1988.1843
日期:1988.11.5
Aromatic hydrocarbons are nitrated with good regioselectivities by clay-supported cupric nitrate in the presence of aceticanhydride. The procedure commends itself by its simplicity and gives useful yields (75–98%). In each case, the predominant product can be predicted by consideration of the Huckel HOMO for the aromatic ring.
在乙酸酐存在下,粘土负载的硝酸铜以良好的区域选择性硝化芳烃。该程序以其简单性而著称,并提供了有用的产量 (75-98%)。在每种情况下,可以通过考虑芳环的 Huckel HOMO 来预测主要产物。
Palladium-Catalyzed Cross-Coupling Alkylation of Arenediazonium <i>o</i>-Benzenedisulfonimides
were reacted with tetramethyltin, tetrabutyltin or trialkylboranes. The reactions, carried out in the presence of palladium(II) derivatives as precatalysts, gave the methylation and alkylation products with good overall conversions. The o-benzenedisulfonimide was recovered in high yield from all the reactions and could be recycled for the preparation of other salts.
芳基重氮邻苯二磺酰亚胺与四甲基锡、四丁基锡或三烷基硼烷反应。在钯 (II) 衍生物作为预催化剂存在下进行的反应得到甲基化和烷基化产物,具有良好的总转化率。邻苯二磺酰亚胺从所有反应中以高收率回收,并可循环用于制备其他盐。
Direct Catalytic Decarboxylative Amination of Aryl Acetic Acids
作者:Duanyang Kong、Patrick J. Moon、Odey Bsharat、Rylan J. Lundgren
DOI:10.1002/anie.201912518
日期:2020.1.13
the acid unit to generate isocyanate or radical intermediates. Reported here is a process for the direct chemoselective decarboxylative amination of electron-poor arylacetates by oxidative Cu catalysis. The reaction proceeds at (or near) roomtemperature, uses native carboxylicacid starting materials, and is compatible with protic, electrophilic, and other potentially complicating functionality. Mechanistic