Synthesis and Plant Growth Regulation Activity of 3-(2-Chloro-4-trifluoromethylphenoxy)-N-aryl benzamides

Eight new compounds of title compounds were synthesized by the reaction of aryl amines with 3-(2-chloro-4-trifluoromethylphenoxy) benzoyl chloride which was prepared from 3-(2-chloro-4-trifluoromethylphenoxy) benzoic acid and thionyl chloride. They were confirmed by IR, 1H NMR, MS and elemental analysis. Their plant growth regulating activities were tested by wheat coleoptile and cucumber cotyledon test. At the concentration of 10 μg/g, all of the compounds exhibited stimulating activities to the growth of wheat coleoptile.The stimulating activity of 3b(27.08%) was higher than that of β-indoleacetic(IAA)(10.10%). The stimulating activities to the growth of cucumber root of compounds 3d(55.55%) and 3h(66.66%) were higher than that of IAA(12.5%) at the concentration of 10 μg/g.