NUCLEOPHILIC SUBSTITUTION OF p-DINITROBENZENE WITH SOME CARBANIONS. FORMATION OF p-SUBSTITUTED NITROBENZENES
Treatment of p-dinitrobenzene with active methylene compounds of rather weak acidity in the presence of t-BuOK in liq NH3 at −70 °C leads to nucleophilic substitution of a nitro group, giving p-substituted nitrobenzenes in generally good yields.