An expedient domino three-component [3+2]-cycloaddition/annulation protocol: regio- and stereoselective assembly of novel polycyclic hybrid heterocycles with five contiguous stereocentres
作者:Shanmugavel Uma Maheswari、Subbu Perumal
DOI:10.1016/j.tetlet.2013.10.074
日期:2013.12
A novel three-component strategy for the efficient synthesis of unprecedented polycyclic hybrid heterocycles comprising fused, bridged, and Spiro rings with five contiguous stereocentres in a regio-and stereoselective manner is described. This transformation proceeds via 1,3-dipolar cycloaddition of azomethine ylides generated in situ from the reaction of sarcosine/thiazolidine-4-carboxylic acid and acenaphthoquinone to a series of 2-[arylmethylidene]-3,4-dihydro-1(2H)-acridinones and concomitant annulation through an intramolecular aldol-type reaction. (C) 2013 Elsevier Ltd. All rights reserved.