Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 85, Issue 2, Pages 774-787Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.9b02797
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Funding
- Research Funds for the Central Universities [XDJK2017B015, XDJK2018C040]
- Doctoral Fund of Southwest University [SWU111075, SWU117056]
- Beijing National Laboratory of Molecular Sciences (BNLMS) [20140130]
- National Natural Science Foundation of China [21672173]
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A palladium-catalyzed alkenylation involving remote delta-position C(alkenyl)-H activation of cycloalkenes reacting with electron-deficient alkenes is described. This method features excellent site selectivity and stereoselectivity to efficiently afford only E-selective highly substituted 1,3-diene derivatives with extra-ligand-free and good functional group tolerance including estrone and free N-H tryptamine under weakly alkaline conditions. Mechanistic studies suggest that picolinamide as a bidentate directing group enables the formation of unique alkenyl palladacycle intermediates.
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