Results 31 to 40 of about 5,282 (198)
Advances in asymmetric organocatalysis over the last 10 years
Nature Communications, 2020 Organocatalysis has become a major pillar of (asymmetric) catalysis. Here, the authors discuss recent trends in organocatalytic activation modes for challenging stereoselective transformations and the emerging integration with other fields, such as ...
Shao-Hua Xiang, Bin Tan
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Stereodivergent propargylic alkylation of enals via cooperative NHC and copper catalysis
Nature Communications, 2022 The ability to construct multiple stereocenters in a modular fashion is an important goal of synthetic organic chemistry. Here the authors present a method to construct oxindoles in four stereoisomers with high enantioselectivity and diastereoselectivity
Yu-Hua Wen +4 more
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Harnessing Carbenoid Reactivity From Imidazoles and Oxiranes
Advanced Synthesis &Catalysis, EarlyView.The combination of azole compounds and oxiranes exhibits carbenoid reactivity at elevated temperatures, as demonstrated by the successful benzoin condensation of aromatic aldehydes. Using this catalytic system to polymerize bifunctional aldehyde/oxirane monomers yields thermosets with glass transition temperatures above 100°C.
Matthias R. Steiner +4 more
wiley +1 more source
Nature Communications, 2022 Nitriles have proven to be useful functional groups in pharmaceuticals and polymers, both as active moieties themselves or as easy precursors to further transformations, but synthesis of benzonitriles with axial chirality has often been difficult.
Ya Lv +5 more
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Molecules, 2023 In 1971, chemists from Hoffmann-La Roche and Schering AG independently discovered a new asymmetric intramolecular aldol reaction catalyzed by the natural amino acid proline, a transformation now known as the Hajos–Parrish–Eder–Sauer–Wiechert reaction ...
Arianna Quintavalla +2 more
doaj +1 more source
Angewandte Chemie, Volume 138, Issue 2, 9 January 2026.By harnessing chalcogen bonding (ChB) catalysis, an exclusive access into a highly stereoselective strain‐release C‐glycosylation pathway was discovered. This was surprisingly not replicable by the conceptually similar halogen bonding (XB) catalysis.
Hao Guo, Charles C. J. Loh
wiley +2 more sources
Angewandte Chemie International Edition, EarlyView.The synergistic interplay of electricity, light and earth‐abundant, nontoxic iron catalysis allowed for the efficient recycling of post‐consumer polymers into value‐added products. This robust depolymerization strategy was viable on multigram‐scale, where the cathodic hydrogen evolution reaction presents an attractive opportunity for a green hydrogen ...
Maxime Hourtoule +5 more
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On the Nature of Improper Hydrogen Bonding in RCH2F and RCHF2 Motifs
Angewandte Chemie, Volume 138, Issue 2, 9 January 2026.The nature of ‘improper’ hydrogen bonds is explored in FnC─H⋯X systems, such as RCF2H interaction with chloride and water. It is noted that increased fluorination decreases the positive charge density on H but increases it on C, thus these interactions are dominated by electrostatic attraction to C over H.
Bruno A. Piscelli +3 more
wiley +2 more sources
Mechanochemistry assisted asymmetric organocatalysis: A sustainable approach
Beilstein Journal of Organic Chemistry, 2012 Ball-milling and pestle and mortar grinding have emerged as powerful methods for the development of environmentally benign chemical transformations. Recently, the use of these mechanochemical techniques in asymmetric organocatalysis has increased.
Pankaj Chauhan, Swapandeep Singh Chimni
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Molecules, 2021 In our studies, the organocatalytic 1,3-dipolar cycloaddition between 2-nitrobenzofurans or 2-nitrobenzothiophene and N-2,2,2-trifluoroethyl-substituted isatin imines has been developed.
Maciej Saktura +4 more
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