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Chiral Primary Amine (chiral + primary_amine)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Chiral Primary Amine,Polyoxometalate Acid Hybrids as Asymmetric Recoverable Iminium-Based Catalysts

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 26 2009
Jiuyuan Li
Abstract A new strategy for the immobilization of iminium organocatalysts through the acid,base assembly of multidentate chiral primary amines and solid polyacids is presented. A suitable structurally distinctive C2 -symmetric chiral primary amine (CPA) was identified in this study and the optimal CPA,POM hybrid obtained catalyzed the Diels,Alder cycloaddition of ,-substituted acroleins in high yields and fair-to-high selectivity under aqueous conditions. The primary amine in the metal,organic-framework (MOF)-like catalyst acted as the catalytic center as well as multidentate basic centers, whereas phosphotungstic acid played dual roles as both catalyst anchors and modulators of the activity and stereoselectivity. Furthermore, the MOF-like catalyst showed both high reactivity and physical stability and thus could be recycled and reused six times with only a small loss of activity and selectivity. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) [source]

Organocascade Reactions of Enones Catalyzed by a Chiral Primary Amine,

ANGEWANDTE CHEMIE, Issue 39 2009
Li-Yuan Wu
Durch chirale primäre Amine werden acyclische ,,,-ungesättigte Ketone für eine charakteristische Sequenz aus zwei Michael-Additionen aktiviert. Dieser Ansatz bietet eine Alternative für die Entwicklung organokatalysierter Reaktionskaskaden (siehe Schema, EWG= elektronenziehende Gruppe) und ergänzt die Diels-Alder-Reaktion bei der einstufigen, hoch stereoselektiven Synthese komplizierter Cyclohexangerüste. [source]

ChemInform Abstract: Asymmetric Synthesis of Nitrocyclopropanes Catalyzed by Chiral Primary Amines.

CHEMINFORM, Issue 21 2010
Li-ting Dong
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Synthesis of Chiral Azophenolic Pyridino-18-crown-6 Ether and Its Enantiomeric Recognition Toward Chiral Primary Amines.

CHEMINFORM, Issue 18 2007
Jae-kon Kim
Abstract ChemInform 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. [source]

Chiral Primary Amine,Polyoxometalate Acid Hybrids as Asymmetric Recoverable Iminium-Based Catalysts

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 26 2009
Jiuyuan Li
Abstract A new strategy for the immobilization of iminium organocatalysts through the acid,base assembly of multidentate chiral primary amines and solid polyacids is presented. A suitable structurally distinctive C2 -symmetric chiral primary amine (CPA) was identified in this study and the optimal CPA,POM hybrid obtained catalyzed the Diels,Alder cycloaddition of ,-substituted acroleins in high yields and fair-to-high selectivity under aqueous conditions. The primary amine in the metal,organic-framework (MOF)-like catalyst acted as the catalytic center as well as multidentate basic centers, whereas phosphotungstic acid played dual roles as both catalyst anchors and modulators of the activity and stereoselectivity. Furthermore, the MOF-like catalyst showed both high reactivity and physical stability and thus could be recycled and reused six times with only a small loss of activity and selectivity. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) [source]