Etofen Ilfi,Lusofarmaco,Italy,1980
10 g sodium salt of N-2,6-dichloro-m-tolylanthranilic acid, 3 ml chloromethyl
ethyl ether and 80 ml dry acetone were refluxed for 12 hours on waterbath
under stirring. The solid was filtered off, and the solution evaporated to
dryness. The residue was dissolved in chloroform, washed with sodium
carbonate solution, then with water until neutral. After drying on sodium
sulfate, the solution was evaporated to dryness. The obtained product was
recrystallized from 95% ethanol. Melting point 73°C to 74°C.
