Rp. Robinson et Km. Donahue, SYNTHESIS OF N-ALKOXYCARBONYL AND N-CARBOXAMIDE DERIVATIVES OF ANTIINFLAMMATORY OXINDOLES, Journal of heterocyclic chemistry, 31(6), 1994, pp. 1541-1544
The synthesis of N-alkoxycarbonyl and N-carboxamide derivatives of ant
i-inflammatory oxindoles is described. These compounds, sought as pote
ntial prodrugs of the parent anti-inflammatory agents, were obtained b
y ring opening of the oxadiazine dione intermediates formed by the tre
atment of 1-unsubstituted 3-acyloxindoles with chlorocarbonyl isocyana
te.