HRID1276085
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In a similar manner to the preparation of 5-(3-chloro-5-trifluoromethylpyridin-2yl)-3-methyl-1-(1-methylethyl)benzimidazol-2-one described above, 2.5 g of 5-(3-chloro-5-trifluoromethyl-pyridin-2yl)-1-(1-methylethyl)benzimidazol-2 -one and 1.23 g of ethyl bromoacetate gave 2.1 g (68%) of colorless crystals. Yield: 68%, m.p.L 125-127° C.