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Unsaturated Imines (unsaturated + imine)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Practical Stereo- and Regioselective, Copper(I)-Promoted Strecker Synthesis of Sugar-Modified ,,, -Unsaturated Imines

HELVETICA CHIMICA ACTA, Issue 3 2006
Guobin Zhou
Abstract The regio- and stereoselective, Lewis acid catalyzed Strecker reaction between Me3SiCN and different aldimines incorporating a 2,3,4,6-tetrakis- O -pivaloyl- D -glucopyranosyl (Piv4Glc) chiral auxiliary has been worked out. Depending on the conditions used, high yields (up to 95%) and good diastereoselectivities (de >,86%) were achieved under mild conditions (Table,1), especially with CuBr,,,Me2S as catalyst. Our protocol allows the ready preparation of asymmetric ,,, -unsaturated , -amino acids such as (R)-2-amino-4-phenylbut-3-enoic acid (13; Scheme,2) and congeners thereof. [source]

Tuning Electronic and Steric Effects: Highly Enantioselective [4+1] Pyrroline Annulation of Sulfur Ylides with ,,,-Unsaturated Imines,

ANGEWANDTE CHEMIE, Issue 26 2010
Liang-Qiu Lu
Sterische und elektronische Effekte: Mithilfe einer neuartigen [4+1]-Cycloaddition von atropisomeren Schwefel-Yliden 1 und ungesättigten Iminen 2 gelingt die Synthese enantiomerenangereicherter Pyrroline 3 in hohen Ausbeuten. Die beobachteten hohen Stereoselektivitäten wurden anhand einer Konformationsanalyse der Ylide erklärt. [source]

Rhodium(I)-Catalyzed [4+1],Cycloaddition Reactions of ,,,-Unsaturated Imines with Terminal Alkynes for the Preparation of Pyrrole Derivatives,

ANGEWANDTE CHEMIE, Issue 44 2009
Akio Mizuno
Rhodiumvinyliden-Intermediate charakterisieren die Titelreaktion (siehe Schema). Die Reaktion verläuft über die nucleophile Addition des Imin-Stickstoffatoms an den Rhodiumvinyliden-Komplex zu einem zwitterionischen Intermediat, das durch intramolekulare Cyclisierung zum Pyrrol weiterreagiert. coe: Cycloocten, Cy: Cyclohexyl. [source]

ChemInform Abstract: Ionic Liquids as Solvents for a Ruthenium-Catalyzed C,H Activation Reaction: Synthesis of Heterocyclic Compounds from ,,,-Unsaturated Imines, Carbon Monoxide, and Ethylene.

CHEMINFORM, Issue 36 2010
Tobias Biletzki
Abstract The influence of reaction conditions (ionic liquid, pressure, temperature, time) on outcome and product ratio is studied. [source]

One-Pot Tandem 1,4,1,2-Addition of Phosphites to ,,,-Unsaturated Imines for the Synthesis of Glutamic Acid Analogues.

CHEMINFORM, Issue 12 2006
Kristof Moonen
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]