Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 71, Issue 6, Pages 2346-2351Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo0525027
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A novel approach to diversely functionalized spirocyclic oxindoles has been developed by using different metal-mediated carbonyl-addition/cyclization reaction sequences. Spirocyclization precursors, 2-indolinonetethered homoallylic alcohols, (buta-1,3-dien-2-yl)methanols, and alpha-allenols have been obtained by regioselective addition of stabilized organoindium reagents to isatins in aqueous environment. Ruthenium-, silver-, and palladium-catalyzed reactions of the above unsaturated alcohol derivatives provided oxaspiro oxindoles.
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