Study on hydrogenation of m-nitrotrifluorotoluene over TiO_2 supported Pd-Fe catalyst at normal pressure

The hydrogenation of m-nitrotrifluorotoluene was studied over TiO2 supported Pd-Fe catalyst at normal pressure.The effects of reaction conditions such as reaction time,amount of solvent,reaction temperature and amount of catalyst were investigated.The structure of product was characterized by IR,1HNMR spectra and elemental analysis.The optimum conditions of catalytic hydrogenation were as follows:2.6 g of catalyst was used on one mol of m-nitrotrifluorotoluene,80 mL of ethanol was used on one mol of m-nitrotrifluorotoluene,the reaction temperature was 50 ℃,and the reaction time was 2 h.The yield was 97.7%,the selectivity of m-trifluoromethylaniline was 99.2%.