Friedel–Crafts reactions catalyzed by samarium diiodide
作者:Mohamad Soueidan、Jacqueline Collin、Richard Gil
DOI:10.1016/j.tetlet.2006.05.169
日期:2006.7
Samariumdiiodide is an efficient precatalyst for the Friedel–Crafts reaction involving various aromatic substrates and chelating electrophiles. Alkyl 3,3,3-trifluoropyruvates are transformed into α-hydroxyesters in good yields with total regioselectivity. In reactions involving an ethyl glyoxylate or a glyoxylic imine, α-hydroxyesters or α-aminoesters are obtained with variable amounts of products
Friedel–Crafts reaction catalyzed by perfluorinated rare earth metals
作者:Min Shi、Shi-Cong Cui
DOI:10.1016/s0022-1139(02)00126-4
日期:2002.8
The Friedel–Craftsreaction of anisole with acetic anhydride can be carried out in the presence of perfluorinated rare earth metal catalyst without organic solvent. Perfluorodecalin (C10F18, cis- and trans-mixture) can be used as a fluorous phase solvent for this reaction. Whereas, the reaction of N,N-dimethylaniline with acetic anhydride did not give the corresponding Friedel–Craftsreaction product
苯甲醚与乙酸酐的Friedel-Crafts反应可以在全氟化稀土金属催化剂存在下进行而无需有机溶剂的情况下进行。全氟萘烷(C 10 F 18,顺式和反式混合物)可用作该反应的氟相溶剂。而N,N-二甲基苯胺与乙酸酐的反应未得到相应的Friedel-Crafts反应产物。另一方面,在存在全氟路易斯酸的情况下,还研究了N,N-二甲基苯胺与乙醛酸乙酯的Friedel-Crafts反应。实际上同时形成了三个产品。
Palladium/Copper-Catalyzed Di-α-arylation of Acetic Acid Esters
作者:Bingrui Song、Thomas Himmler、Lukas J. Gooßen
DOI:10.1002/adsc.201100172
日期:2011.7
bimetallic palladium/copper catalystsystem was found to effectively promote the diarylation of alkyl acetates with arylhalides under unprecedentedly mild conditions. The phenanthroline‐copper‐phosphine catalyst stabilizes the enolate intermediate to the extent that the deprotonation of esters can be achieved even with the mild base potassium phosphate. The palladium tri‐tert‐butylphosphine co‐catalyst
Combination of Lithium Chloride and Hexafluoroisopropanol for Friedel-Crafts Reactions
作者:Jieping Zhu、Matthieu Willot、JinChun Chen
DOI:10.1055/s-0028-1087566
日期:2009.3
A combination of weak Lewis acid (LiCl) and weak Bronsted acid (hexafluoroisopropanol, HFIP) promotes efficiently the Friedel-Craftsreaction of electron-rich arom. compds. with Et glyoxylate. [on SciFinder (R)]
An unprecedented oxidant-mediated reductive amination of tertiary anilines and aldehydes without external reducing agents was developed via the nucleophilic attack of the oxygen atom of the carbonyl group to in situ generated iminium ions, in which tertiary anilines were used as both nitrogen source and reducing agent for the first time.