Method for the preparation of 4-(heptafluoro-2-propyl) anilines

A method for the preparation of compound of formula (I);

• the method comprises a reaction REAC1, wherein
• compound of formula (II)
• is reacted with 2-bromoheptafluoropropane in the presence of sodium dithionite, in a solvent SOLV1 and in the presence of a catalyst CAT1;
• wherein the reaction mixture of REAC1 has only one liquid phase;
• R is CF3 or methyl;
• SOLV1 is selected from the group consisting of methyl acetate, ethyl acetate, butyl acetate, propyl acetate, isopropyl acetate, tert-butylacetate, dimethyl carbonate, diethyl carbonate, acetone, 2-butanone, ethylene glycol, acetonitrile, propionitrile, valeronitrile, 1,4-dioxane, tetrahydrofuran, 2-methyl tetrahydrofuran, 1,2-dimethoxyethane, methyl tert-butyl ether, sulfolane, and mixtures thereof;
• CAT1 is selected from the group consisting of formic acid, acetic acid, propionic acid, benzoic acid, sulfuric acid, hydrochloric acid, sodium hydrogen sulfate, potassium hydrogen sulfate, tetramethylammonium hydrogen sulfate, tetrabutylammonium hydrogen sulfate, NaH2PO4, Na2HPO4, KH2PO4, K2HPO4, Bu4NH2PO4, sulfamic acid, pyridinium hydrochloride, methane sulfonic acid, toluene sulfonic acid, and mixtures thereof.