Water → 6-Methyl-4H-imidazo[1,5,4-de]quinoxaline-2,5(1H,6H)-dione

Participants

Reaction Steps

A solution of 1-[(4-methylphenyl)sulfonyl]-6-methyl-4H-imidazo[1,5,4-de]quinoxaline-2,5(1H,6H)-dione (600 mg, 1.68 mmol) in conc. H2SO4 (3 mL) was heated at 50° C. for 30 min, then poured into H2O at 0° C. (25 mL). The resulting precipitate was isolated by filtration, washed with H2O, and dried in vacuo to give the title compound. MS: m/z=204 (M+1).

Provenance & Evidence