反应详情

A mixture of 5-bromomethyl-2,3-dichloro-pyridine from step (a) above (121 mg, 0.5 mmol) and potassium phthalimide (139 mg, 0.75 mmol, Aldrich) in DMF (1 mL) was stirred at room temperature for 30 min. Water (5 mL) was added and the mixture was extracted with EtOAc (2×20 mL). The combined organic extracts were washed with water (5 mL) and brine (5 mL), dried over Na2SO4, and filtered. The filtrate was evaporated in vacuo and the residue was suspended in 20% EtOAc/hexane, and filtered. The solid was washed with 20% EtOAc/hexane and dried in vacuo to give the title compound. MS (ESI, pos. ion) m/z: 307 (M+1).

1. extractionthe mixture was extracted with EtOAc (2×20 mL)
2. washThe combined organic extracts were washed with water (5 mL) and brine (5 mL)
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. customThe filtrate was evaporated in vacuo
6. filtrationfiltered
7. washThe solid was washed with 20% EtOAc/hexane
8. customdried in vacuo