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Kinetic Resolution of Allyltriflamides through a Pd-Catalyzed C-H Functionalization with Allenes: Asymmetric Assembly of Tetrahydropyridines

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TLDR
In this article, a simple and practical method for enantioselective assembly of tetrahydropyridines, which is paired to a kinetic resolution of α-branched allyltriflamides, is reported.
Abstract
Enantioenriched, six-membered azacycles are essential structural motifs in many products of pharmaceutical or agrochemical interest. Here we report a simple and practical method for enantioselective assembly of tetrahydropyridines, which is paired to a kinetic resolution of α-branched allyltriflamides. The reaction consists of a formal (4+2) cycloaddition between the allylamine derivatives and allenes and is initiated by a palladium(II)-catalyzed C-H activation process. Both the chiral allylamide precursors and the tetrahydropyridine adducts were successfully obtained in high yields, with excellent enantioselectivity (up to 99% ee) and selectivity values of up to 127.

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Citations
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On the application of 3d metals for C-H activation toward bioactive compounds: The key step for the synthesis of silver bullets.

TL;DR: In this article, a review summarizes the use of 3D metal catalysts in C-H activation processes to obtain potentially (or proved) biologically active compounds and concludes that 3D catalysts are important catalysts for obtaining potentially biologically active molecules.
Journal ArticleDOI

Palladium-Catalyzed γ,γ'-Diarylation of Free Alkenyl Amines.

TL;DR: A palladium-catalyzed γ,γ'-diarylation of free alkenyl amines through interrupted chain walking for the synthesis of Z-selective amines was reported in this paper.
Journal ArticleDOI

Recent advances in palladium-catalyzed (hetero)annulation of CC bonds with ambiphilic organo(pseudo)halides

TL;DR: Palladium has proven to be effective in catalyzing the (hetero)annulation of CC bonds with ambiphilic organo(pseudo)halides as mentioned in this paper.
Journal ArticleDOI

Asymmetric Synthesis of Hydroquinazolines Bearing C4-Tetrasubstituted Stereocenters via Kinetic Resolution of α-Tertiary Amines.

TL;DR: A novel protocol for asymmetric synthesis of hydroquinazolines bearing C4-tetrasubstituted stereocenters has been achieved through kinetic resolution of 2-amido α-tertiary benzylamines via chiral phosphoric acid catalyzed intramolecular dehydrative cyclizations.
References
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Journal ArticleDOI

Weak coordination as a powerful means for developing broadly useful C-H functionalization reactions.

TL;DR: The motivation for studying Pd-catalyzed C-H functionalization assisted by weakly coordinating functional groups is discussed, and efforts to bring reactions of this type to fruition are chronicle.
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Mild metal-catalyzed C–H activation: examples and concepts

TL;DR: This review presents the current state of the art in this field and detail C-H activation transformations reported since 2011 that proceed either at or below ambient temperature, in the absence of strongly acidic or basic additives or without strong oxidants.
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Transition metal-catalyzed C–H activation reactions: diastereoselectivity and enantioselectivity

TL;DR: This critical review discusses historical and contemporary research in the field of transition metal-catalyzed carbon-hydrogen (C-H) bond activation through the lens of stereoselectivity, placing an emphasis on reactions that are (or may soon become) relevant in the realm of organic synthesis.
Journal ArticleDOI

Catalytic Enantioselective Transformations Involving C-H Bond Cleavage by Transition-Metal Complexes.

TL;DR: This analysis comprehensively review all asymmetric transition-metal-catalyzed methodologies that are believed to proceed via an inner-sphere-type mechanism, with an emphasis on the nature of stereochemistry generation.
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