400 mg of the 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-(trifluoroacetyl)-1,2,3,6-tetrahydropyridine [154-2] was dissolved in 10 mL of N,N-dimethylformamide, then 196 mg of the t-butyl[(1S)-1-(4-bromophenyl)ethyl]carbamate [106-1], 54 mg of [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (II), and 181 mg of potassium carbonate were added thereto, and stirred overnight at 80° C. The reaction mixture was cooled back to room temperature, then diluted in 100 mL of ethyl acetate, and washed with water and saturated brine in the subsequent order. The obtained organic layer was dried over anhydrous magnesium sulfate, and the insolubles were filtered. The filtrate was concentrated under reduced pressure, and the obtained residue was purified by silica gel column chromatography, to obtain 100 mg of t-butyl((1S)-1-{4-[1-(trifluoroacetyl)-1,2,3,6-tetrahydropyridin-4-yl]phenyl}ethyl)carbamate [154-3] as a white solid.
