反应详情

温度

90 °C

To a scintillation vial was added racemic tert-butyl 6-bromo-5-chloropyridin-2-yl((tetrahydro-2H-pyran-3-yl)methyl)carbamate (832 mg, 2.051 mmol), 5-chloro-2-fluoropyridin-4-ylboronic acid (719 mg, 4.10 mmol) and PdCl2(dppf).CH2Cl2 adduct (167 mg, 0.205 mmol) followed by DME (3 mL) and 2M Na2CO3 aq (2 mL). The mixture was heated at 90° C. for 20 h, then allowed to cool and added water and then extracted with EtOAc (×3). The organics were washed with water (×2), saturated brine (×2), then dried (Na2SO4), filtered and evaporated under reduced pressure. The resulting residue was purified by flash column chromatography (silica gel; 5% to 15% EtOAc/heptanes) to give racemic tert-butyl 3,5′-dichloro-2′-fluoro-2,4′-bipyridin-6-yl((tetrahydro-2H-pyran-3-yl)methyl)carbamate (374 mg)

1. temperatureto cool
2. extractionextracted with EtOAc (×3)
3. washThe organics were washed with water (×2), saturated brine (×2)
4. dry with materialdried (Na2SO4)
5. filtrationfiltered
6. customevaporated under reduced pressure
7. customThe resulting residue was purified by flash column chromatography (silica gel; 5% to 15% EtOAc/heptanes)