نتایج جستجو برای: arenes

تعداد نتایج: 1476  

Journal: :Chemical communications 2012
Ge Wu Jun Zhou Min Zhang Peng Hu Weiping Su

Using CuBr(2) as an additive, the Pd-catalyzed intermolecular C-H-C-H cross-coupling between benzoxazoles and unactivated simple arenes has been developed. This protocol provides a straightforward approach for the biological activity of 2-arylbenzoxazole derivatives.

2018
Timofey Skvortsov Patrick Hoering Ksenia Arkhipova Roger C Whitehead Derek R Boyd Christopher C R Allen

Here, we present draft genome sequences of Pseudomonas putida strains UV4 and UV4/95, which demonstrate an ability to conduct a wide range of industrially important biotransformations of arenes, alkenes, and phenols.

Journal: :Chemical communications 2008
Juzo Oyamada Tsugio Kitamura

Palladium complexes with bidentate phosphine ligands, Pd(dppe)(OAc)(2) and Pd(dppm)(OAc)(2), were found to be effective catalysts for reactions of simple arenes with ethyl propiolate, affording arylbutadiene derivatives selectively.

Journal: :Chemical communications 2010
Vijay Gopalsamuthiram Rui Huang William D Wulff

A facile synthesis of optically active mono and trisubstituted calix[4]arenes is described wherein the chirality at the methylene bridges arises from centers of chirality present in the diyne and the bis-carbene complex from which they are constructed.

Journal: :Chemical communications 2006
Mickaël Huiban Aline Huet Louisa Barré Franck Sobrio Eric Fouquet Cécile Perrio

The 11C-monomethylstannate prepared from [11C]-methyl iodide and Lappert's stannylene, was subject to a palladium-mediated cross-coupling reaction with an aryl halide under ligand-free conditions, to afford easily purified 11C-methyl(hetero)arenes in high radiochemical yields.

Journal: :Chemical communications 2007
Marcin Bielawski Berit Olofsson

Unsymmetric and symmetric diaryliodonium triflates are synthesized from both electron-deficient and electron-rich substrates in a fast, high yielding, and operationally simple protocol employing arenes and aryl iodides or iodine.

Journal: :The Journal of organic chemistry 2013
Xinzhang Yu Songjie Yu Jian Xiao Boshun Wan Xingwei Li

Cp*Rh(III)-catalyzed intermolecular C-C couplings between activated α-diazocarbonyl compounds and arenes bearing a range of azacyclic directing groups have been achieved. This catalytic alkylation reaction operates under mild conditions with good functional group tolerance.

Journal: :Organic letters 2009
Da-Gang Yu Miao Yu Bing-Tao Guan Bi-Jie Li Yang Zheng Zhen-Hua Wu Zhang-Jie Shi

The Suzuki-Miyaura coupling of aryl nitriles with aryl/alkenyl boronic esters is reported. With this method, the cyano group could be applied as a protecting group of arenes and finally as a leaving group to further construct polyaryl scaffolds.

Journal: :Chemcatchem 2021

Electron-rich alkoxy-substituted (hetero)arenes and electrophilic fluoroalkyl moieties represent advantageous partners for substitution reactions due to their electronic match. Fluoroalkylation strategies of are herein presented which depict photocatalytic thermal methods. Photocatalytic methods rely on the use diverse photocatalysts such as Ru(bpy)3Cl2, tetrabutylammonium decatungstate TBADT, ...

Friedel–Crafts synthesis of triarylmethanes over 3-methyl-1-sulfonic acid imidazolium tetrachloroaluminate under green conditions:In this work, Friedel–Crafts (FC) alkylation of various arenes with aromatic aldehydes catalyzed by 3-methyl-1-sulfonic acid imidazoliumtetrachloroaluminate {[Msim]AlCl4}, as a green catalyst, to prepare triarylmethanes (TAMs) has been carried out. Some aromatic alde...

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