Hydrochloric Acid → HCID 20551284, compound

Participants

Reaction Steps

A suspension of 6.9 g (30 mmol) of 6-(4-aminophenyl)-1,2-dihydro-2-oxonicotinic acid, 10 g (100 mmol) of potassium bicarbonate, and 100 ml of water is stirred at room temperature and 300 ml of dimethylformamide is added followed by 6.0 ml (43 mmol) of benzyl chloroformate. The mixture is stirred at room temperature for 2 hrs and 6.0 ml of benzyl chloroformate and 6.0 g of potassium bicarbonate are added. The reaction is stirred overnight at room temperature and poured into 700 ml of ice water. The pH is adjusted to 3 with hydrochloric acid and the precipitate is filtered, washed with water, and dried to give 9.44 g of 6-[4-(benzyloxycarbonylamino)phenyl]-1,2-dihydro-2-oxonicotinic acid after recrystallization from N,N-dimethylacetamide-methanol.

Provenance & Evidence