Potassium Carbonate → 2,5-Dichloro-4-(3-bromo-5-trifluoromethyl-2-pyridyloxy)-1-(3,3-dichloro-2-propenyloxy)benzene

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Reaction Steps

To a mixture of 0.77 g of 2,5-dichloro-4-(3-bromo-5-trifluoromethyl-2-pyridyloxy)phenol, 0.29 g of potassium carbonate and 20 ml of N,N-dimethylformamide, a solution prepared by dissolving 0.31 g of 1,1,3-trichloropropene in 5 ml of N,N-dimethylformamide was added dropwise at room temperature with stirring. After stirring at room temperature for 10 hours, the reaction solution was poured into ice-water, and extracted twice with 50 ml of ethyl acetate. Then, the ethyl acetate layers were combined, washed with water, dried over anhydrous magnesium sulfate and then concentrated to give a crude product. This crude product was subjected to silica gel chromatography to give 0.81 g of 2,5-dichloro-4-(3-bromo-5-trifluoromethyl-2-pyridyloxy)-1-(3,3-dichloro-2-propenyloxy)benzene, yield 83%; m.p., 95.4° C.

Provenance & Evidence