反应详情

A solution of ethyl-5-bromonicotinate (30 g, 130.40 mmol), triethylamine (78 mL) and ethyl acetate (130 mL) is degassed for 15 min. Add trimethylsilylacetylene (88.46 mL, 625.92 mmol), bis(triphenylphosphine)palladium (II) dichloride (4.57 g, 6.52 mmol) and copper (I) iodide (0.25 g, 1.30 mmol) and stir at 50° C. under-nitrogen for 16 h. Cool to room temperature, filter through diatomaceous earth, wash with ethyl acetate, and concentrate. Purify the residue by silica gel chromatography, eluting with 10:1 hexanes:ethyl acetate, to give the title compound (27.7 g, 86%).

1. filtrationfilter through diatomaceous earth
2. washwash with ethyl acetate
3. concentrationconcentrate
4. customPurify the residue by silica gel chromatography
5. washeluting with 10:1 hexanes