Results 151 to 160 of about 3,258 (176)
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Asymmetric Organocatalysis with Sulfones
Angewandte Chemie - International Edition, 2010AbstractAsymmetric organocatalysis has become a powerful tool for the synthesis of optically active compounds. Whereas early research mainly focused on combining simple reagents as a proof‐of‐concept for asymmetric organocatalysis, recent investigations are directed towards extending the concept to more target‐ and diversity‐oriented synthesis.
Marcio W Paixao +2 more
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Radicals in Asymmetric Organocatalysis
Angewandte Chemie International Edition, 2007AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Bertelsen, Søren +2 more
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Hydrazones as Singular Reagents in Asymmetric Organocatalysis [PDF]
Chemistry - A European Journal, 2016 AbstractThis Minireview summarizes strategies and developments regarding the use of hydrazones as reagents in asymmetric organocatalysis, their distinct roles in nucleophile–electrophile, cycloaddition, and cyclization reactions. The key structural elements governing the reactivity of these reagents in a preferred pathway will be discussed, as well as ...
David Monge Fernández +2 more
exaly +5 more sources
INDIAN DRUGS, 2021
Dear Reader, Two basic reactions that were taught to us in the organic chemistry courses were the aldol condensation reaction and the Diels-Alder reaction. In aldol condensation, discovered by the French chemist Charles Wurtz in 1872, an enolate ion reacts with a carbonyl compound in the presence of an acid/ base catalyst to form a β-hydroxy aldehyde ...
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Dear Reader, Two basic reactions that were taught to us in the organic chemistry courses were the aldol condensation reaction and the Diels-Alder reaction. In aldol condensation, discovered by the French chemist Charles Wurtz in 1872, an enolate ion reacts with a carbonyl compound in the presence of an acid/ base catalyst to form a β-hydroxy aldehyde ...
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Nucleophilic Carbenes in Asymmetric Organocatalysis
Accounts of Chemical Research, 2004AbstractFor Abstract see ChemInform Abstract in Full Text.
Dieter, Enders, Tim, Balensiefer
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Asymmetric Organocatalysis Under Mechanochemical Conditions
Chemical Record, 2023AbstractAsymmetric organocatalysis is a robust methodology providing access to numerous valuable compounds while having green chemistry principles in mind. The realization of organocatalytic transformation under solvent‐free mechanochemical conditions brings additional benefits in terms of yields, selectivities, and, last but not least overall improved
Viktória, Némethová +3 more
exaly +3 more sources
A Chiral Solvent Effect in Asymmetric Organocatalysis
Organic Letters, 2010Proline-catalyzed aldol reactions between enolizable ketones and aromatic aldehydes can be carried out in propylene carbonate. When enantiomerically pure propylene carbonate is used, the combination of (R)-proline and (R)-propylene carbonate constitutes a matched pair, while (S)-proline and (R)-propylene carbonate constitutes a mismatched pair.
North M, Villuendas P
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Applications of asymmetric organocatalysis in medicinal chemistry
Chem. Soc. Rev., 2013In the last decade, organocatalysis, the use of small chiral organic molecules as catalysts, has proven to be a valuable and attractive tool for the synthesis of enantiomerically enriched molecules. A number of organocatalysts and processes, such as one-pot, tandem, cascade or multicomponent reactions, have been reported to date.
José, Alemán, Silvia, Cabrera
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Solvent‐Free Asymmetric Organocatalysis in a Ball Mill
Angewandte Chemie, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Belén, Rodríguez +2 more
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Asymmetric organocatalysis in total synthesis – a trial by fire
Natural Product Reports, 2010Financial support was provided by the DFG (SPP1179), the Fonds der Chemischen Industrie (Dozentenstipendium to M. C.), the Alexander von Humboldt Stiftung (postdoctoral fellowship to E. M.-L.), the Fundación Aragón I + D(permanent contract to R. P. H.), Consejo Superior de Investigaciones Científicas CSIC (PIE 200880I260), the Ministerio de Ciencia e ...
Marqués-López, Eugenia +2 more
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