反应详情

To a solution of 3′-fluoro-4-methyl-3,4′-bipyridine-2′-carbonitrile (0.029 g, 0.136 mmol) in THF (Volume: 0.680 ml) cooled to 0° C. was added (4-fluorophenyl) magnesium bromide (0.170 ml, 0.340 mmol). The reaction mixture was allowed to stir at room temperature for 5 hr. Water and ice were carefully added, followed by acidification with 6 M HCl. After stirring for 20 min, CH2Cl2 was added and the pH was adjusted to 8.5 with aqueous 4 M NaOH. The layers were separated and the aqueous phase was extracted with CH2Cl2 (9×). The organics layers were combined, dried over Na2SO4, filtered, and concentrated to afford a residue. The crude material was dissolved in a minimal amount of CH2Cl2 to be chromatographed. Purification of the crude material by silica gel chromatography using an ISCO machine (12 g column, 30 mL/min, 70-90% EtOAc in hexanes over 14 min, tr=8 min) gave the title compound (29 mg, 0.089 mmol, 65.3% yield). ESI MS (M+H)+=311.1.

1. stirringAfter stirring for 20 min
2. customThe layers were separated
3. extractionthe aqueous phase was extracted with CH2Cl2 (9×)
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customto afford a residue
8. customto be chromatographed
9. customPurification of the crude material by silica gel chromatography
10. customan ISCO machine (12 g column, 30 mL/min, 70-90% EtOAc in hexanes over 14 min, tr=8 min)