indolin-2-one and isoindolin-1-one and their derivatives starting from 2-(carboxymethyl)benzoicacid, which was first regiospecifically converted into the isomeric half esters. Transformation of the acid functionalities to the acyl azides followed by Curtius rearrangement gave the regioisomeric isocyanates. Reaction of the isocyanates with aniline produced urethane derivatives. Intramolecular cyclization provided
A new three-component reaction among o-phthalaldehyde, N-alkyl/aryl Substituted urea, and an aromatic aldehyde has been developed at ambient condition, and a class of isoindolinones with novel C-3 Substitution were conveniently synthesized. The general diastereomeric excess is high as over 99% of the products indicated the excellent stereoselectivity posed in this multicomponent reaction. (C) 2008 Elsevier Ltd. All rights reserved.