NOVELTY - Synthesis of herbicides (3a-3g), in one step involving N-arylation using potassium fluoride/alumina without solvent and transition metal, at room temperature for reaction time of 5 minutes, is claimed. N-butyl-N-ethyl-2,6-dinitro-4-(trifluoromethyl)aniline (3a) herbicide is synthesized using N-ethylbutan-1-amine and 2-chloro-1,3-dinitro-5-(trifluoromethyl)benzene as raw material. 4-Methyl-2,6-dinitro-N,N-dipropylaniline (3b) herbicide is synthesized using dipropylamine and 2-chloro-5-methyl-1,3-dinitrobenzene as raw material.    USE - Synthesis of N-butyl-N-ethyl-2,6-dinitro-4-(trifluoromethyl)aniline used as herbicide.    ADVANTAGE - The method enables synthesis of herbicides by simple and environmentally-friendly method, by one step process and in absence of solvents, transition metals and under mild conditions.    DETAILED DESCRIPTION - Synthesis of herbicides (3a-3g), in one step involving N-arylation using potassium fluoride/alumina without solvent and transition metal, at room temperature for reaction time of 5 minutes, is claimed. N-butyl-N-ethyl-2,6-dinitro-4-(trifluoromethyl)aniline (3a) herbicide is synthesized using N-ethylbutan-1-amine and 2-chloro-1,3-dinitro-5-(trifluoromethyl)benzene as raw materials. 4-Methyl-2,6-dinitro-N,N-dipropylaniline (3b) herbicide is synthesized using dipropylamine and 2-chloro-5-methyl-1,3-dinitrobenzene as raw materials. N-ethyl-N-(2-memylallyl)-2,6-dinitro-4-(trifluoromethyl)aniline (3c) herbicide is synthesized using N-ethyl-2-rnethylprop-2-en-l-amine and 2-chloro-1,3-dinitro-5-(trifluoromethyl)benzene as raw materials. N-(2-chloroethyl)-2,6-dinitro-n-propyl-4-(trifluoromethyl)aniline (3d) herbicide is synthesized using N-(2-chloroethyl)propan-1-amine and 2-chloro-1,3-dinitro-5-(trifluoromethyl)benzene as raw materials. 2,6-Dinitro-N',N'-dipropyl-4-(trifluoromethyl)benzene-1,3-diamine (3e) herbicide is synthesized using dipropylamine and 3-chloro-2,4-dinitro-6-(trifluoromethyl)aniline as raw materials. 2,6-Dinitro-N,N-dipropyl-4-(trifluoromethyl)aniline (3f) herbicide is synthesized using dipropylamine and 2-chloro-1,3-dinitro-5-(trifluoromethyl)benzene as raw material. 4-(Dipropylamino)-3,5-dinitrobenzenesulfonamide (3g) herbicide is synthesized using dipropylamine and 4-chloro-3,5-dinitrobenzenesulfonamide as raw material.