Synthesis of New Dipyrimidine and Dialkyl Terephthalate Derivatives from 2,6-Diphenyl-sulphonyloxy-1H, 3H, 5H, 7H-pyrrolo [3,4-F] isoindole- 1, 3, 5, 7-tetrone


THE TITLE compound 2 was obtained by treatment of 2,6-dihydroxypyromellitimide 1 with benzenesulphonyl chloride. Compound 2 was used as starting material for the synthesis of new dipyrimidine and dialkyl 2,5-di [(alkoxycarbonyl) amino] terephthalate derivatives. The reaction of 2 with different amines was intensively investigated with respect to the probability of isomerization.