Ethyl Acetate → (S)-tert-butyl (1-((5-(2-chloro-4-(propylamino)pyrimidin-5-yl)-4-pentyn-1-yl)amino)-1-oxopropan-2-yl)(methyl)carbamate

Participants

Reaction Steps

To a solution of 2-chloro-5-iodo-N-propylpyrimidin-4-amine (F1, 2.00 g) and (S)-tert-butyl methyl(1-oxo-1-(4-pentyn-1-ylamino)propan-2-yl)carbamate (U4, 2.16 g) in N,N-dimethylformamide (40 mL), triethylamine (4.67 mL), bis(triphenylphosphine)palladium(II) dichloride (0.47 g) and copper(I) iodide (0.26 g) were added at room temperature, and the mixture was stirred at the same temperature for 1.5 hours, and then further stirred at 45° C. for 0.5 hour. The reaction mixture was cooled to room temperature, and then saturated aqueous ammonium chloride and ethyl acetate were added to the reaction mixture. The organic layer was separated, washed with saturated aqueous sodium chloride, and then dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (eluent, 80 to 30% hexane in ethyl acetate) to obtain (S)-tert-butyl (1-((5-(2-chloro-4-(propylamino)pyrimidin-5-yl)-4-pentyn-1-yl)amino)-1-oxopropan-2-yl)(methyl)carbamate (V1, 2.49 g) as pale yellow oil.

Provenance & Evidence