N,N-Dimethylglycine hydrochloride → ethyl(E)-3-(3-methoxy-4-{5-[2-(4-trifluoromethylphenyl)vinyl]pyridin-2-yloxy}phenyl)propionate

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To ethyl 3-[4-(5-bromopyridin-2-yloxy)-3-methoxyphenyl]propionate (610 mg, 1.6 mmol) were added 4-trifluoromethylstyrene (0.332 mL, 2.2 mmol), dichlorobis(benzonitrile)palladium(II) (33 mg, 0.082 mmol), N,N-dimethylglycine hydrochloride (17 mg, 0.16 mmol), sodium acetate (263 mg, 3.2 mmol) and N-methylpyrrolidone (5 mL) under an argon atmosphere. The resulting solution was stirred under an argon atmosphere for 17 hours at 130° C. To the reaction solution was added ethyl acetate and filtered. The filtrate was washed with water, and then dried over anhydrous sodium sulfate. The solvent was evaporated, and the residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=3:1), to thereby yield 500 mg of the title compound.

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