نتایج جستجو برای: palladium compounds
تعداد نتایج: 237995 فیلتر نتایج به سال:
The palladium hydride-iminium complex generated from Pd/C and triethylamine catalyses the isomerisation of allylic alcohols into carbonyl compounds, and Pd/C catalyses the conjugate reduction of activated double bonds using triethylamine as the source of the two newly incorporated hydrogen atoms via the same complex.
A series of complexes based on the combination of cyclometallated palladium or platinum moieties with functionalized dipyrrin ligands bearing mesityl- or benzonitrile groups have been prepared and characterized both in the solid state and in solution; these compounds exhibit a characteristic dipyrrin-centered luminescence with an emission intensity modulated by the degree of rotational freedom ...
A palladium-catalyzed difluoromethylthiolation of heteroaryl halides and triflates under mild conditions was described. A vast range of heteroaryl halides such as pyridyl, quinolinyl, benzothiazolyl, thiophenyl, carbazolyl and pyazolyl halides could be difluoromethylthiolated efficiently, thus providing medicinal chemists with new tools for their search of new lead compounds for drug discovery....
The two-step mechanochemical preparation of carbene-pyridine complexes of palladium and platinum is reported. The organometallic products, which represent a class of commercially available catalysts, are rapidly formed in excellent yield proving solvent-free synthesis to be a viable synthetic alternative even in the case of NHC-containing compounds.
Late-stage tritiation with high selectivity, isotopic purity and functional-group tolerance is important for the radiolabelling of drug candidates or bioactive compounds. Now, a broadly applicable protocol using aryl thianthrenium salts allows complex molecules by hydrogenolysis via an intermediate cationic palladium complex.
Suzuki-Miyaura reaction of aryl and vinyl halides or triflates with organoboron reagents has developed into one of the most important C-C bond-forming reactions.1,2 The mild and simple reaction conditions, the availability of various boronic acids that are normally nontoxic and stable, and easy workup and separation of the products are some of the factors that are responsible for the increasing...
Abstract Herein, we report a new one-step direct synthesis of aromatic azo compounds from anilines under mild conditions. With the catalysis copper acetate mediated by palladium salt, rapid conversion to can be observed conditions base-free along with solvent-free. Furthermore, cross-coupling nitridation reaction based on this strategy was also studied. This research provides not only way for s...
The palladium-catalyzed oxidative Heck-reaction, also referred to as Fujiwara-Moritani-reaction, has been investigated for the synthesis of styrenylsulfonyl compounds. Acetanilides and vinylsulfonyl compounds undergo dehydrogenative coupling reactions in moderate quantitative yields, using benzoquinone oxidant choice. Potassium peroxodisulfate, which had previously identified a superior with ac...
Dibenzo-fused five-membered heteroaromatic compounds, including dibenzofuran, carbazole, and dibenzothiophene, are fundamental structural units in various important polycyclic compounds. The intramolecular C-H/C-H biaryl coupling of diaryl (thio)ethers amines based on palladium(II) catalysis under oxidative conditions is known to be one the most effective, step-economic methods for their constr...
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