Tetrahydrofuran → 1-[5-(4-Fluoro-phenylethynyl)-pyridin-2-yl]-4,4-dimethyl-pyrrolidin-2-one

Participants

Reaction Conditions

Reaction Steps

4,4-Dimethyl-1-(5-trimethylsilanylethynyl-pyrimidin-2-yl)-pyrrolidin-2-one (Example 120, step 2) (30 mg, 0.1 mmol) was dissolved in DMF (1 ml). 1-Fluoro-4-iodobenzene (32 mg, 0.14 mmol, 1.4 equiv.), Et3N (43 μl, 0.31 mmol, 3 equiv.), Bis-(triphenylphosphine)-palladium(II)dichloride (4 mg, 5.2 μmol, 0.05 equiv.) and copper(I)iodide (0.6 mg, 3.1 μmol, 0.03 equiv.) were added under nitrogen and the mixture was heated to 70° C. TBAF 1M in THF (115 μl, 0.115 mmol, 1.1 equiv.) was added dropwise in 20 minutes at 70° C. The reaction mixture was stirred for 30 minutes at 70° C. and evaporated with isolute to dryness. The crude product was purified by flash chromatography with a 20 g silica gel column and eluting with heptane:ethyl acetate 100:0->0:100. The desired 1-[5-(4-fluoro-phenylethynyl)-pyridin-2-yl]-4,4-dimethyl-pyrrolidin-2-one (24 mg, 73% yield) was obtained as a white solid, MS: m/e=310.1 (M+H+).

Provenance & Evidence