AlCl3, aluminium chloride; formic acid; hydroxylamine hydrochloride; 2,3-dicyano-5,6-dichloro-p-benzoquinone in acetonitrile T=80°C; 12 h; Schlenk technique; Overall yield = 61 percent;

AlCl3, aluminium chloride; formic acid; hydroxylamine hydrochloride; 2,3-dicyano-5,6-dichloro-p-benzoquinone in acetonitrile T=80°C; 12 h; Schlenk technique; Overall yield = 61 percent;