Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 43, Pages 12683-12686Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201507303
Keywords
annulations; copper; cyclizations; radicals; silver
Categories
Funding
- National Science Foundation [CHE-1265491]
- Direct For Mathematical & Physical Scien [1265491] Funding Source: National Science Foundation
- Division Of Chemistry [1265491] Funding Source: National Science Foundation
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An efficient two-step method for the assembly of indanone derivatives starting from a simple vinyl arene has been developed. The sequence first involves addition of bis(pinacolato) diboron (B(2)pin(2)) and N-cyano-N-phenyl-p-methylbenzenesulfonamide (NCTS) to a broad range of styrenes by utilizing IMesCuCl as catalyst. This step simultaneously accomplishes hydroboration of the alkene and ortho cyanation of the benzene unit. The products thus obtained are further functionalized by a AgNO3/Selectfluor-mediated coupling of the BPin and cyano functionalities to annulate a new five-membered ring. This combined two-step sequence provides a versatile method for the site-selective derivatization of a broad range of vinyl arene substrates.
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