反应详情

Add 4-cyano-5-ethyl-1-methyl-3-(4-trifluoromethanesulfonyloxy-phenyl)-1H-pyrrole-2-carboxylic acid ethyl ester (0.204 g, 0.474 mmol, prepared in example E-97a or E-97b), 4-pyridyl boronic acid (0.116 g, 0.948 mmol), Pd2(dba)3 (13.02 mg, 0.01422 mmol), triphenyl phosphine (14.92 mg, 0.0569 mmol), 2M aqueous potassium carbonate (2 mL, 4.0 mmol) in 3 ml of dioxane, and heat to reflux with stirring. After 2.5 hours, cool the reaction mixture and pour into water. Extract the quenched reaction with ethyl acetate. Combine the organic extracts, dry over anhydrous sodium sulfate, filter, and concentrate under reduced pressure. Purify the residue by flash chromatography eluting with 1:1 ethyl acetate:hexanes to ethyl acetate to provide the title compound. Mass spectrum (m/e) 360.1 (M+1).

1. temperatureheat
2. temperatureto reflux
3. temperaturecool the reaction mixture
4. extractionExtract
5. customthe quenched reaction with ethyl acetate
6. dry with materialdry over anhydrous sodium sulfate
7. filtrationfilter
8. concentrationconcentrate under reduced pressure
9. customPurify the residue by flash chromatography
10. washeluting with 1:1 ethyl acetate