| Literature DB >> 28657674 |
Jeffrey A Boerth1, Jonathan A Ellman1.
Abstract
A CoIII -catalyzed three-component coupling of C(sp2 )-H bonds, alkynes, and halogenating agents to give alkenyl halides is reported. This transformation proceeds with high regio- and diastereoselectivity, and is effective for a broad range of aryl and alkyl terminal alkynes. Diverse C-H bond partners also exhibit good reactivity for a range of heteroaryl and aryl systems as well as synthetically useful secondary and tertiary amide, urea, and pyrazole directing groups. This multicomponent transformation is also compatible with allenes in place of alkynes to furnish tetrasubstituted alkenyl halides, showcasing the first halo-arylation of allenes.Entities:
Keywords: C−H activation; alkynes; allenes; homogeneous catalysis; multicomponent reactions
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Year: 2017 PMID: 28657674 PMCID: PMC5568819 DOI: 10.1002/anie.201705817
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN: 1433-7851 Impact factor: 15.336