| Literature DB >> 24604837 |
Simon Duttwyler1, Shuming Chen, Colin Lu, Brandon Q Mercado, Robert G Bergman, Jonathan A Ellman.
Abstract
The first example of C alkylation of 1,2-dihydropyridines with alkyl triflates and Michael acceptors was developed to introduce quaternary carbon centers with high regio- and diastereoselectivity. Hydride or carbon nucleophile addition to the resultant iminium ion also proceeded with high diastereoselectivity. Carbon nucleophile addition results in an unprecedented level of substitution to provide piperidine rings with adjacent tetrasubstituted carbon atoms.Entities:
Keywords: alkylation; diastereoselectivity; heterocycles; reduction; synthetic methods
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Year: 2014 PMID: 24604837 PMCID: PMC4058641 DOI: 10.1002/anie.201310517
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN: 1433-7851 Impact factor: 15.336