An unprecedented copper acetate-DMSO promoted methylthiolation of arenes and heteroarenes in the presence air has been developed. The reaction is highly regioselective under directing group influence pyridine pyrimidine functional units gives thiomethylated product moderate to high yields.

We describe a modular, palladium catalyzed synthesis of aryl(hetero)aryl benzophenones and aryl benzoates from halides using CHCl3 as the carbonyl source in presence KOH. The reaction occurs tandem through an initial carbonylation to generate aroyl halide, which undergoes coupling with arylboronic acids, bornonates, phenols. Direct carbonylative indoles at third position has also been accomplished under slightly modified conditions by situ activation C-H bond. Notably, is convenient safe...

Methanol synthesis from CO2 hydrogenation has drawn global attention as catalytic is an attractive choice to mitigate emissions and lessen dependency on fossil resources. In the present study, we have synthesized ZrO2 CeO2-supported In2O3 catalysts for methanol performances of Inx/ZrO2, Inx/CeO2 (x = 1 % 13 %) were compared. Specifically, effect CeO2 supports catalyst during was explored. This study reveals that support increased activity while decreased although both almost same indium...

Novel detailed chemistry of WS₂ synthesis.

In this study, the oxidative conversion of 5-hydroxymethylfurfural into essential chemicals on recyclable metal (Pt, Pd, Ru, Co, & Ni)- supported catalysts is reported. While most catalytic reactions require a base as an additive, current study provided base-free environmentally benign heterogeneous system. The were performed various M/CNT catalysts. As support, CNT played important role in reaction mechanism. These showed high activity for free oxidation HMF under air aqueous media....

Copper acetate mediated regioselective ortho-arylthiolation of 2-arylpyridines has been accomplished for the first time using S-aryl arenesulfonothioate as arylthiolating agent. The reaction shows good functional group tolerance and gives thioarylated products in 67-89% yields. This reagent is a alternative to unpleasant smelling arylthiols. Experimental evidence suggests an unprecedented insertion arylthio unit from both parts (SPh p-TolSO2) presence copper acetate. Indoles imidazopyridines...

A transition-metal-free one-pot synthesis of di-functionalized succinimides by radical cascade seleno/thiosulfonation aza-1,6-enynes in an atom economical manner has been developed. The developed method allows the highly decorated under mild reaction conditions with excellent stereoselectivity. proposed pathway for is well supported control experiments. reaction's advantageous features are operational simplicity, economy, and functional group tolerance broad substrate scope.

A highly efficient platinum nanoparticle functionalized carbon nanocomposite is demonstrated to be a recyclable heterogeneous catalyst for asymmetric hydrogenation of methyl pyruvate.

Various C1 feedstocks and lower hydrocarbons (C2-C4) can be produced from CO2 hydrogenation, which is an important way to utilize excess provide alternative fuel options for dwindling fossil fuels. Herein, a novel two-bed catalytic system was developed increase the yield of liquid range hydrocarbons, where first bed composed In2O3-ZrO2 (13 wt. In %)/HZSM-5 second desilicated HZSM-5 placed downstream bed. A maximum hydrocarbon selectivity found about 86% with 7.2% conversion at 533 K, while...

A novel process is developed to prepare highly efficient single site Pt(111) hexagonal nanocrystals on a carbon support for the asymmetric hydrogenation of α-ketoesters.

Abstract The present study highlights platinum nanoparticles incorporated chiral polyamide for asymmetric hydrogenation of carbonyl group. Chiral polyamides are synthesized from monomers, camphoric dichloride and achiral diamine monomers by interfacial condensation reaction. This supports have helical structure with molecular chirality. helices provide environment to that transfer substrate during catalytic hydrogenation. chemical optical selectivity increases dispersion on which act like...

Abstract Styrenes serve as unique aryl or arylcarboxymethylene source towards isocyanides in the presence of Cu(II)/TBHP, and yield N ‐arylbenzamides benzoyloxyacetanilides respectively. The chemoselectivity reaction is controlled by nature substituents present on styrene ring. Whereas styrenes substituted with electron‐releasing alkyl alkoxy groups ‐arylbenzamides, unsubstituted those electron‐withdrawing furnish major product. With benzylamines substrate, are formed exclusively they act...

Abstract New efficient catalysts based on electrophilic N ‐fluoro quaternary ammonium salts are reported for catalytic allylation of ( E )‐ ,1‐diphenylmethanimine. The chiral version the catalyst cinchonidine (F‐CD‐BF 4 ) shows high activity with approximately 94% ee and TOF (>800 h −1 ). F‐CD‐BF is prepared from Selectfluor by one‐step transfer fluorination.

1,3-Bis(1-alkyl-1<italic>H</italic>-indol-3-yl)benzene derivatives have been synthesized through a Zn(OTf)₂ catalyzed reaction between cyclohexanones and indoles.

Asymmetric heterogeneous hydrogenation of the carbonyl group is one most important reactions for development new chiral molecules. This study involves asymmetric α-ketoesters using a Pt/graphene support–based catalytic system and cinchonine as modifier. The catalyst produces high enantioselectivity (> 96.8%) conversion (99.8%). Recyclability tested up to five cycles, sustainable activity found.

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Abstract The reaction proceeds with high regioselectivity in modest to good yields.