Isoindolone Formation via Intramolecular Diels-Alder Reaction

The intramolecular Diels-Alder reaction provides a useful synthetic methodology to build biologically active and synthetically useful isoindolone ring systems. An application of this methodology, providing an efficient manufacturing route to an mGluR2 positive allosteric modulator via a 1,5,7-substituted isoindolone, is reported herein.