Potassium Carbonate → HCID 10516574, compound

Participants

Reaction Steps

To a stirred mixture of 12.8 g (0.049 mole) of ethyl 8-hydroxy-1,3-dioxolo[4,5-g]quinoline-7-carboxylate and 13.5 g (0.098 mole) of potassium carbonate in 500 ml of dimethylformamide was added 11.7 g (0.059 mole) of O-(2,4-dinitrophenyl)hydroxylamine. The reaction mixture was stirred overnight at room temperature. An additional 5.0 g of O-(2,4-dinitrophenyl)hydroxylamine and 300 ml of dimethylformamide were then added and stirring was continued again overnight. The solvent was removed in vacuo, the residue stirred in 500 ml of water, and the product was collected by filtration and recrystallized from dimethylformamide to give 7.6 g of ethyl 5-amino-5,8-dihydro-8-oxo-1,3-dioxolo[4,5-g]quinoline-7-carboxylate, pale orange crystals, m.p. 251°-253° C.

Provenance & Evidence