Asymmetric Hydrogenation Of Methyl Research Articles

Asymmetric hydrogenation of methyl 3,5-dioxohexanoate catalyzed by ru-binap complex: a short step asymmetric synthesis of dihydro-60methyl-2-H-pyran-2-one

Hydrogenation of methyl 3,5-dioxohexanoate 3 using Ru 2Cl 4((R) or (S)-binap) 2(NEt 3) as the catalyst gave dominantly anti 3,5-dihydroxyester 9, which was then converted into unsaturated lactone 4. The pathway of the hydrogenation reaction was also investigated.

Correction. Asymmetric Hydrogenation of Methyl-(Z)-α-acetamidocinnamate Catalyzed by {1,2-Bis(phenyl-o-anisoyl)phosphino)ethane}rhodium(I): Kinetics, Mechanism and Origin of Enantioselection

Correction. Asymmetric Hydrogenation of Methyl-(Z)-α-acetamidocinnamate Catalyzed by {1,2-Bis(phenyl-o-anisoyl)phosphino)ethane}rhodium(I): Kinetics, Mechanism and Origin of Enantioselection

ChemInform Abstract: Asymmetric Hydrogenation of Methyl‐(Z)‐α‐acetamidocinnamate Catalyzed by (1,2‐Bis((phenyl‐o‐anisoyl)phosphino)ethane)rhodium(I): Kinetics, Mechanism, and Origin of Enantioselection.

AbstractThe less stable of the two diastereomeric adducts (III) leads to the predominant product enantiomer (IV) by virtue of its much higher reactivity toward H2.

Asymmetric hydrogenation of methyl (Z)-.alpha.-acetamidocinnamate catalyzed by [1,2-bis(phenyl-o-anisoyl)phosphino)ethane]rhodium(I): kinetics, mechanism and origin of enantioselection

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAsymmetric hydrogenation of methyl (Z)-.alpha.-acetamidocinnamate catalyzed by [1,2-bis(phenyl-o-anisoyl)phosphino)ethane]rhodium(I): kinetics, mechanism and origin of enantioselectionClark R. Landis and Jack HalpernCite this: J. Am. Chem. Soc. 1987, 109, 6, 1746–1754Publication Date (Print):March 1, 1987Publication History Published online1 May 2002Published inissue 1 March 1987https://doi.org/10.1021/ja00240a025RIGHTS & PERMISSIONSArticle Views4201Altmetric-Citations449LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (1021 KB) Get e-Alerts Get e-Alerts

Asymmetric Hydrogenation Catalyzed by (Achiral Base)bis(dimethylglyoximato)cobalt(II)-Chiral Cocatalyst System

Abstract Chiral tertiary amines with a secondary amide group at α- or β-carbon were prepared, and an asymmetric hydrogenation of methyl 2-(acetylamino)acrylate and N,N′-dimethyl-5-benzylidenehydantoin catalyzed by achiral base-coordinated bis(dimethylglyoximato)cobalt(II)-chiral cocatalyst system was examined by using each of them as the cocatalyst. The enantiomeric excess of N,N′-dimethyl-5-benzylhydantoin reached 79.1% with (S)-N-[(R)-1-phenylethyl]-2-quinuclidinecarboxamide as the cocatalyst. Remarkable differences were observed in the enantioselectivities between the two substrates for the same cocatalysts. Discussion about the conformations of the cocatalysts and substrates led to proposed models of chirality-recognizing transition states.