Treatment of either 2, 4-or 2, 3-dinitroaniline in alkaline methanol solution at 50'with aqueous sodium hypochlorite gives rise to an unusual substitution reaction which proceeds by way of the corresponding nitrobenzofurazan oxide as an intermediate. The product in each case is a chloromethoxybenzofurazan oxide in which the nitro group in the nitrobenzofurazan oxide intermediate has been replaced by a chloro group and an ...