反应详情

温度

85 °C

1-Benzyl-4-iodo-1H-pyrazole (1.35 g, 4.77 mmol), 2-chloropyridin-3-ylboronic acid (1.50 g, 9.53 mmol), sodium bicarbonate (1.20 g, 14.3 mmol) and Pd(PPh3)4 (276 mg, 0.239 mmol) were combined in an argon-purged sealed tube. Dimethoxyethane (8 mL) and water (5 mL) were added and the mixture was heated to 85° C. for 16 hours. The reaction was cooled to rt, diluted with water and extracted into EtOAc. The separated organic layer was dried over anhydrous sodium sulfate, filtered and concentrated. This residue was purified by silica gel chromatography (50-75% EtOAc/hexanes) to yield 3-(1-benzyl-1H-pyrazol-4-yl)-2-chloropyridine as a light yellow oil after concentration. MS m/z=270 [M+1]+. Calc'd for C15H12FN3: 269.74.

1. custompurged
2. customsealed tube
3. additionDimethoxyethane (8 mL) and water (5 mL) were added
4. temperatureThe reaction was cooled to rt
5. additiondiluted with water
6. extractionextracted into EtOAc
7. dry with materialThe separated organic layer was dried over anhydrous sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated
10. customThis residue was purified by silica gel chromatography (50-75% EtOAc/hexanes)