A novel one-step direct reductive coupling reaction between nitroarenes and sodium arylsulfinates was realized in the presence of an inexpensive Pd/C catalyst. In this procedure, readily available nitroarenes are employed as the nitrogen sources, and sodium arylsulfinates serve as both coupling partners and reductants. The method features high efficiency by using cheap Pd/C with low catalyst loading
A one-potthree-componentreaction involving nitroarenes, (hetero)arylboronic acids, and potassium pyrosulfite leading to sulfonamides was described. A broad range of sulfonamides bearing different reactive functional groups were obtained in good to excellent yields through sequential C-S and S-N coupling that does not require metal catalysts.
Copper-Catalyzed Aminoarylation of Alkenes via Aminyl Radical Addition and Aryl Migration
作者:Jin-Lin Wang、Mei-Ling Liu、Jian-Yu Zou、Wen-Hui Sun、Xue-Yuan Liu
DOI:10.1021/acs.orglett.1c03973
日期:2022.1.14
We describe a new strategy for aminoarylation of alkenes by copper-catalyzed smilesrearrangement using O-benzoylhydroxylamines as the amine reagent. This method affords various β-amino amide derivatives possessing a quaternary carbon center with wide functional group tolerance and high regioselectivity. The mechanistic studies indicate that the transformation can involve aminyl radical intermediates
Multicomponent synthesis of sulfonamides from triarylbismuthines, nitro compounds and sodium metabisulfite in deep eutectic solvents
作者:Xavier Marset、Javier Torregrosa-Crespo、Rosa M. Martínez-Espinosa、Gabriela Guillena、Diego J. Ramón
DOI:10.1039/c9gc01541h
日期:——
Na2S2O5 and nitro compounds in a DeepEutecticSolvent (DES) as a reaction medium is described. Thus, triarylbismuthines are used as reagents for the incorporation of SO2 into organic motifs. The bismuth salts formed as by-products can be easily removed from the crude reaction mixture by precipitation with water, while the use of volatile organic compounds (VOCs) as solvents can be avoided in the entire
描述了一种在深度共晶溶剂(DES)中使用铜催化的方法从三芳基双变异蛋白,Na 2 S 2 O 5和硝基化合物开始可持续合成磺酰胺的方法。因此,将三芳基双突变蛋白用作掺入SO 2的试剂变成有机图案。通过用水沉淀,可以很容易地从粗反应混合物中除去作为副产物形成的铋盐,同时在整个过程中可以避免使用挥发性有机化合物(VOC)作为溶剂。用作溶剂的低共熔混合物已得到充分表征,初步结果证明其毒性低。设计的DES还可以进行新颖的多组分反应,从而节省时间并减少纯化步骤,能源和成本。
Mechanism of the Triplet-Sensitized Photolysis of<i>N</i>-(1-Naphthylsulfonyl)-<i>N</i>-phenyl-<i>O</i>-(<i>p</i>-toluoyl)hydroxylamine
The title hydroxylamine (SO2NT) undergoes triplet-sensitized photolysis in the presence of benzophenone (BP) or its derivative to give rearrangement and fragmentation products. Observations of the toluoyloxyl-migrated products, which are not obtained by the triplet-sensitized photolysis of N-(1-naphthoyl)-N-phenyl-O-(p-toluoyl)hydroxylamine (NT), indicate the occurrence of an efficient intersystem