Hydrochloric Acid → HCID 22903587, compound

Participants

Reaction Steps

First, a mixture containing 246 mg of 4-cyano-5-(4-oxo-4H-pyridin-1-yl)-1,2-phenylenediamine, 294 mg of oxalic acid, and 5 ml of 2N hydrochloric acid was refluxed by heating in an oil bath for 2 hours. The mixture was cooled and precipitated crystals were filtered. Then, 284 g of the crude crystals thus obtained were further recrystallized with 2N hydrochloric acid to give 201 mg of 6-cyano-7-(4-oxo-4H-pyridin-1-yl)-1,4-dihydroquinoxaline-2,3-dione.

Provenance & Evidence