A reaction mixture of 4-bromo-1-(1-chloro-4,4,4-trifluorobutyl)-2-methylbenzene (369 g), sodium carbonate (245% g), methyl 4-aminobenzoate (194 g), sodium iodide (347 g) and DMA (1.2 L) was stirred at 50° C. for 3 hr. The reaction mixture was added to water. This reaction was performed for 3 batches, the obtained respective reaction mixtures were combined, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The resulting solid was collected by filtration and washed with petroleum ether to give the title compound (1164 g).
