The Mitsonubo reagent (triphenylphosphine and dialkyl azodicarboxylates) was employed as a potential anionic nucleophile in a reaction involving aryl halides to produce aryl hydrazides. Aryl iodides and bromides, with electron-withdrawing as well as electron-releasing groups on the aromatic ring, undergo coupling reactions in good yields. The optimized conditions are developed for aryl iodides at room
Mitsonubo 试剂(三苯基膦和偶氮二羧酸二烷基酯)在涉及芳基卤化物以产生芳基酰肼的反应中用作潜在的阴离子亲核试剂。芳基碘化物和溴化物在芳环上具有吸电子和放电子基团,以良好的产率进行偶联反应。开发了室温下芳基碘和 60-75 °C 芳基溴的优化条件。
Ruthenium chloride, a new and efficient catalyst for direct amination of arenes with azodicarboxylates
作者:Suleman M. Inamdar、Vinod K. More、Sisir K. Mandal
DOI:10.1016/j.tetlet.2012.11.075
日期:2013.2
An efficient cross coupling amination of arene with azodicarboxylate to afford hydrazides catalysed by ruthenium chloride has been demonstrated. The catalyst was found to be effective across a spectrum of arenes with a variety of functional groups. The yields are found to be modest to low depending on the type of substrates. The catalyst can be recycled in ligand free conditions to afford the cross
method for intermolecular N-arylation of the anionic species derived from diisopropyl azodicarboxylate and sodiumhydride by aryl trifluoromethanesulfonates, in the presence of a ligand-free copper(I) oxide catalyst at 80 °C in N , N -dimethylformamide, is reported. A variety of functionalized aryl triflouromethanesulfonates were efficiently coupled by this method.
Cross-coupling reaction of aryl diazonium salts with azodicarboxylate using FeCl<sub>2</sub>
作者:M. Khalaj、M. Ghazanfarpour-Darjani
DOI:10.1039/c5ra15875c
日期:——
Arene diazonium salts have been employed as the aryl source in reaction with dialkyl azodicarboxylates to form N-aryl hydrazide derivatives. The optimum conditions are developed using FeCl2 in DMSO at 25 °C for 2 h. Various functional groups were tolerated under the optimum conditions.