An efficient stereoselective synthesis of 3-spirocyclopentene- and 3-spiropyrazole-2-oxindoles via 1,3-dipolar cycloaddition reaction

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Title:	An efficient stereoselective synthesis of 3-spirocyclopentene- and 3-spiropyrazole-2-oxindoles via 1,3-dipolar cycloaddition reaction
Authors:	Selvakumar, K Vaithiyanathan, V Shanmugam, P
Keywords:	Derivatives Annulation Marine-derived fungus Baylis-hillman reaction Allylic compounds Spirocyclic oxindoles Natural-products Spiro compounds Ring expansion Citrinadin-A
Issue Date:	2010
Publisher:	Royal Society of Chemistry
Citation:	Chemical Communications 46(16):2826-2828;2010
Abstract:	The chemistry phosphorus and sulfur ylides have been exploited for a facile, short and efficient synthesis of 3-spirocyclopentene- and 3-spiropyrazole-2-oxindoles from E- and Z-isomers of bromo derivatives of Morita-Baylis-Hillman adducts of isatin with Ph(3)P/activated alkene/K(2)CO(3) and Me(2)S/DEAD/K(2)CO(3), respectively, via [3 + 2]-annulation strategy.
URI:	http://ir.niist.res.in:8080/jspui/handle/123456789/1006
ISSN:	1359-7345
Appears in Collections:	2010

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