Chemistry of Heterocyclic Compounds, Vol. 40, No. 1, 2004 ... AV Varlamov, EV Boltukhina, FI Zubkov, NV Sidorenko, AI Chernyshev, ... A preparative method for the synthesis of 7-carboxy-2-R-isoindol-1-ones was developed on the basis of the [4+2] cycloaddition of secondary furfurylamines to maleic anhydride. ... Keywords: isoindolones, furfurylamines, intramolecular Diels–Alder reaction. ... Isoindolones, or phthalimides, can be obtained from phthalic ...