Palladium-catalysed cyclisation of 2-substituted halogenoarenes by dehydrohalogenation
作者:D.E. Ames、A. Opalko
DOI:10.1016/s0040-4020(01)91149-4
日期:1984.1
satisfactory system being palladium(II) acetate in NN-dimethylacetamide (DMA) with sodium carbonate as base) has been examined as a route to some heterocyclicsystems. Whereas dehydrogenativecyclisation processes require stoichiometric amounts of palladium(II) reagent, the present procedure involves only catalytic amounts (0.1 molar proportion, or less), of palladium compound. The preparation of dibenzofuran
Visible Light-Driven, Gold(I)-Catalyzed Preparation of Symmetrical (Hetero)biaryls by Homocoupling of Arylazo Sulfones
作者:Lorenzo Di Terlizzi、Simone Scaringi、Carlotta Raviola、Riccardo Pedrazzani、Marco Bandini、Maurizio Fagnoni、Stefano Protti
DOI:10.1021/acs.joc.2c00225
日期:2022.4.1
The preparation of symmetrical (hetero)biaryls via arylazo sulfones has been successfully carried out upon visiblelight irradiation in the presence of PPh3AuCl as the catalyst. The present protocol led to the efficient synthesis of a wide range of target compounds in an organic-aqueous solvent under photocatalyst-free conditions.
Ligand-free highly effective iron/copper co-catalyzed formation of dimeric aryl ethers or sulfides
作者:Xiaoming Qu、Tingyi Li、Yan Zhu、Peng Sun、Hailong Yang、Jincheng Mao
DOI:10.1039/c1ob05155e
日期:——
Highly selective coupling of diiodoarenes with phenols or phenthiols can be performed by using a low-cost, benign character and readily available Fe/Cu catalytic system in the absence of ligands. It is noteworthy that the desired dimeric aryl ethers or sulfides could be obtained in high yields by coupling between diiodoarenes and phenols, or diphenols with aryl iodides.
Die Erfindung betrifft eine funkktionelle Flüssigkeit, enthaltend Gemische aus Monophenoxybiphenylen und Diphenoxybiphenylen. Die erfindungsgemäße funktionelle Flüssigkeit besitzt vorteilhafte thermische Eigenschaften und eignet sich daher als Wärmeträgerflüssigkeit.
Described herein are novel amino-terminated poly(aryl ether ketone) oligomers and methods for their production. These amino-terminated poly(aryl ether ketone) oligomers are used as building blocks for a variety of polymers and copolymers.