[摘要]:Keggin-type heteropoly acids were used as catalyst for high-yielding oxidn. reactions in multiphase conditions. This simple and efficient procedure promoted the conversion of anilines to the corresponding nitroso and nitro derivs. In comparison with homogeneous system the oxidn. from anilines to nitroso compds. and nitro compds. were more effective and the solvents used were not toxic.