نتایج جستجو برای: regio and chemoselective

تعداد نتایج: 16827812  

Journal: :Organic & biomolecular chemistry 2014
R Noël V Gembus V Levacher J-F Brière

An organocatalysed and chemoselective one-pot oxa-Michael-cyclocondensation reaction of N-BocNHOH to unsaturated α-ketoesters is reported which affords an original entry to enantioenriched 3-isoxazoline carboxylate derivatives as biorelevant heterocyclic frameworks.

Journal: :Faraday Discussions 2021

An alternative reaction mechanism combined with preferential perpendicular adsorption make non-noble metals chemoselective catalysts for nitroarene hydrogenation.

Journal: :Chemical Communications 2021

Regio and stereoselective addition of a phosphine-borane to alkynyl vinyl gold(i) complexes.

2014
André Haase Andreas Ueberschaer

Das Smartphone für die berufliche Ausbildung zu nutzen und dadurch die verschiedenen Lernorte zu vernetzen, war Ziel eines Comenius-Regio

Journal: :Journal of Synthetic Organic Chemistry, Japan 1992

Journal: :Chemistry 2012
Henning S G Beckmann Andrea Niederwieser Manfred Wiessler Valentin Wittmann

Carbohydrate microarrays are an emerging tool for the high-throughput screening of carbohydrate-protein interactions that represent the basis of many biologically and medicinally relevant processes. The crucial step in the preparation of carbohydrate arrays is the attachment of carbohydrate probes to the surface. We examined the Diels-Alder reaction with inverse-electron-demand (DARinv) as an i...

An efficient one-pot three-component procedure for the synthesis of new chiral spiro-oxindolopyrrolizidines with highly regio-, diastereo-, and enantioselective from 1,3-dipolar cycloaddition of azomethine ylides and optically pure active cinamoyl oxazolidinone are described. The process occurs at room temperature in aqueous ethanol as green solvent and in the absence of any bidentate chelating...

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