Abstract
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.
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