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C-H Functionalization of Amines via Alkene-Derived Nucleophiles through Cooperative Action of Chiral and Achiral Lewis Acid Catalysts: Applications in Enantioselective Synthesis.


ABSTRACT: Catalytic transformations of ?-amino C-H bonds to afford valuable enantiomerically enriched ?-substituted amines, entities that are prevalent in pharmaceuticals and bioactive natural products, have been developed. Typically, such processes are carried out under oxidative conditions and require precious metal-based catalysts. Here, we disclose a strategy for an enantioselective union of N-alkylamines and ?,?-unsaturated compounds, performed under redox-neutral conditions, and promoted through concerted action of seemingly competitive Lewis acids, B(C6F5)3, and a chiral Mg-PyBOX complex. Thus, a wide variety of ?-amino carbonyl compounds may be synthesized, with complete atom economy, through stereoselective reaction of an in situ-generated enantiomerically enriched Mg-enolate and an appropriate electrophile.

SUBMITTER: Shang M 

PROVIDER: S-EPMC6542567 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

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