Results 21 to 30 of about 5,754 (198)

Highly enantio-stereoselective Ni-catalyzed reductive cyclization to cyclopentanes with chiral quaternary centres of trisubstituted allylic siloxanes

open access: yesGreen Synthesis and Catalysis
The construction of chiral quaternary carbon stereocenters is a significant challenge in asymmetric synthesis. Catalytic synthesis of these structures with trisubstituted allylic alcohols is highly important.
Wanjun Chen   +7 more
doaj   +1 more source

Atom Transfer Radical Reactions as a Tool for Olefin Functionalization : On the Way to Practical Applications [PDF]

open access: yes, 2011
Transition-metal-catalyzed atom transfer radical reactions of halogenated compounds with olefins constitute a versatile tool in organic synthesis within the area of C–C bond forming transformations.
Muñoz Molina, José María   +2 more
core   +1 more source

Performance Prediction of the Catalyst PR-81 at the Production Unit Using Mathematical Modeling Method [PDF]

open access: yes, 2015
Using programming support environment FreePascal and FreeBasic, the program providing to calculate values of efficient rate constants for hydrogenation reactions of benz- and dibenzothiophenes in the process of diesel fuel hydrofining, is developed.
Beliy, Aleksandr Sergeevich   +4 more
core   +1 more source

Extension of the single-event microkinetic model to alkyl substituted monoaromatics hydrogenation on a Pt catalyst [PDF]

open access: yes, 2012
The Single-Event Micro Kinetic (SEMK) methodology, which had been successfully applied to benzene hydrogenation on a Pt catalyst, has now been extended toward substituted monoaromatics, that is, toluene and o-xylene.
Bera, Tapan, Marin, Guy, Thybaut, Joris
core   +2 more sources

Experimental Determination of the Equilibrium Conditions of Binary Gas Hydrates of Cyclopentane + Oxygen, Cyclopentane + Nitrogen, and Cyclopentane + Hydrogen [PDF]

open access: yesIndustrial & Engineering Chemistry Research, 2010
In this work, four-phase hydrate equilibrium data for each of the systems cyclopentane (CP) + water + hydrogen, CP + water + nitrogen, and CP + water + oxygen were measured and are reported in the temperature range of 281.3-303.1 K and the pressure range of 2.27-30.40 MPa. Measurements were made using an isochoric method.
Du Jianwei   +3 more
openaire   +2 more sources

Geminale Difunktionalisierung von Ketonen durch C–S Bindungs‐insertion photogenerierter Donor–Donor Diazoverbindungen

open access: yesAngewandte Chemie, EarlyView.
Die geminale Difunktionalisierung leicht verfügbarer Bausteine ermöglicht einen schnellen Zugang zu molekularer Komplexität. Diese Arbeit stellt eine Strategie vor, um zwei unterschiedliche funktionelle Gruppen an einem Carbonylkohlenstoff zu installieren, indem dieser in eine Donor–Donor‐Diazo‐Verbindung überführt wird. Die Methode ist sowohl im Batch‐
Vincent George   +13 more
wiley   +1 more source

Koordinationschemie -gebundener Cyclopentadienyl-Chalkogeno-Ether [PDF]

open access: yes, 1990
Coordination Chemistry of rr-Bonded Cyclopentadienyl Chalcogeno Ethers, I. - Chelate Complexes of Pentakis(methylthio)cymantrene with Metal Carbonyls [C5(SMe)5]Mn(CO)3 (1) reacts with W(CO)5(THF), Mo(CO)4(C7H8), Cr(CO)3(NCMe)3, and Re(CO)4(-C3H5)/HBF4 ...
Abel   +27 more
core   +1 more source

Palladium-Catalyzed Enantioselective Decarboxylative Allylic Alkylation of Cyclopentanones [PDF]

open access: yes, 2015
The first general method for the enantioselective construction of all-carbon quaternary centers on cyclopentanones by enantioselective palladium-catalyzed decarboxylative allylic alkylation is described.
Abbas H. K.   +6 more
core   +3 more sources

Geminal Difunctionalization of Ketones via C─S Bond Insertion of Photogenerated Donor–Donor Diazo Compounds

open access: yesAngewandte Chemie International Edition, EarlyView.
Geminal difunctionalization of readily available building blocks provides rapid access to molecular complexity. This work introduces a strategy for installing two distinct functional groups on a carbonyl carbon by transforming it into a donor–donor diazo compound, enabling both batch and flow applications with broad solvent compatibility.
Vincent George   +13 more
wiley   +1 more source

Biphenyl-Derived Phosphepines as Chiral Nucleophilic Catalysts: Enantioselective [4+1] Annulations To Form Functionalized Cyclopentenes [PDF]

open access: yes, 2014
Because of the frequent occurrence of cyclopentane subunits in bioactive compounds, the development of efficient catalytic asymmetric methods for their synthesis is an important objective.
Fu, Gregory C.   +4 more
core   +2 more sources

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