Results 261 to 270 of about 724,446 (311)

Catalytic reductive desymmetrization of malonic esters

Nature Chemistry, 2021
Desymmetrization of fully substituted carbons with a pair of enantiotopic functional groups is a practical strategy for the synthesis of quaternary stereocentres, as it divides the tasks of enantioselection and C-C bond formation. The use of disubstituted malonic esters as the substrate of desymmetrization is particularly attractive, given their easy ...
Pengwei Xu, Zhongxing Huang
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Catalytic NOx Reduction Studies

SAE Technical Paper Series, 1973
<div class="htmlview paragraph">Hundreds of catalysts have been evaluated in bench activity tests, using synthetic engine exhaust gas to determine conversion of NO to N₂ and NH₃. Many of these catalysts were also exposed to actual engine exhaust in an engine-dynamometer test, and then re-evaluated in ...
H. R. Jackson, D. P. McArthur, H. D. Simpson   +2 more
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Selective Catalytic Reduction - Europe's NOx Reduction Technology

SAE Technical Paper Series, 2003
<div class="htmlview paragraph">The high efficiency of the diesel engine has made it the primary propulsion source for truck applications worldwide. In Europe, the penetration of diesel engines in passenger cars is growing rapidly in an effort to meet the stringent CO₂ future emission targets.
W. Müller, H. Ölschlegel, A. Schäfer, N. Hakim, K. Binder   +4 more
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CATALYTIC REDUCTION OF DINITRILES

Russian Chemical Reviews, 1964
CONTENTS I. Introduction 319 II. Reaction conditions 319 III. Deamination of primary amines 322 IV. Mechanism of the catalytic reduction of nitriles 322 V. Influence of dinitrile structure on the course of the reaction 326 VI.
L Kh Freidlin, T A Sladkova
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Catalytic Azide Reduction in Biological Environments

ChemBioChem, 2012
AbstractIn the quest for the identification of catalytic transformations to be used in chemical biology and medicinal chemistry, we identified iron(III) meso‐tetraarylporphines as efficient catalysts for the reduction of aromatic azides to their amines.
Pijus K, Sasmal, Susana, Carregal-Romero, Alice A, Han, Craig N, Streu, Zhijie, Lin, Kazuhiko, Namikawa, Samantha L, Elliott, Reinhard W, Köster, Wolfgang J, Parak, Eric, Meggers   +9 more
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Reduction-resistant and reduction-catalytic double-crown nickel nanoclusters

Nanoscale, 2014
Ni6(SCH2CH2Ph)12(Ni6) was synthesized using three different methods and fully characterized; importantly, the reduction-resistance and reduction-catalysis properties of Ni6 were revealed.
Min, Zhu, Shiming, Zhou, Chuanhao, Yao, Lingwen, Liao, Zhikun, Wu   +4 more
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Catalytic enantioselective reductive Eschenmoser-Claisen rearrangements

Science
An important challenge in enantioselective catalysis is developing strategies for the precise synthesis of neighboring congested all-carbon quaternary stereocenters. The well-defined transition states of [3,3]-sigmatropic rearrangements and their underlying stereospecificity render them powerful tools for the synthesis of such arrays.
Guoting Zhang, Matthew D. Wodrich, Nicolai Cramer   +2 more
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1.8 Catalytic Reduction of Carbonates

2018
AbstractCarbonates are basic chemicals that are widely used in both industry and academia. Their reduction under either homogeneous or heterogeneous catalytic conditions generates formates, methanol, or methane. Carbonates can also act as a C1 building block for the reductive methylation of amines.
Y. Li, K. Ding
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Selective catalytic reduction for NOx reduction

2022
R. Vignesh, B. Ashok
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Nonselective catalytic reduction

Applied Catalysis A: General, 1993
Sanjay Agarwal, Jerry Spivey
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