Water → 2-Bromo-3-methoxypyridine

Temperature

0 °C

To a solution of 2-bromo-pyridin-3-ol (10.0 g, 57.8 mmol) in DMF (100 ml) was added NaH (4.2 g, 110 mmol) at 0° C. and the reaction mixture was stirred at 0° C. for 0.5 h. Then iodomethane (4.0 mL, 64 mmol) was added dropwise at 0° C. and the resulting solution was stirred at ambient temperature for 2 h. The mixture was poured into water. The organic layer was separated. The aqueous phase was extracted with EtOAc (80×3 mL). The combined organic layers were dried over anhydrous Na2SO4 and distilled under reduced pressure to give a residue, which was purified by chromatography on silica gel (5% ethyl acetate in petroleum ether) to give 2-bromo-3-methoxypyridine (7.0 g, 65%). 1H NMR (400 MHz, CDCl3) δ 7.99 (dd, J=4.8, 1.6, 1H), 7.23 (dd, J=8.0, 4.8, 1H), 7.16 (d, 1H, J=4.8, 1.6), 3.92 (s, 3H).

1. stirringthe resulting solution was stirred at ambient temperature for 2 h
2. customThe organic layer was separated
3. extractionThe aqueous phase was extracted with EtOAc (80×3 mL)
4. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
5. distillationdistilled under reduced pressure
6. customto give a residue, which
7. customwas purified by chromatography on silica gel (5% ethyl acetate in petroleum ether)

ORD record

ord-f87e97c396bd4be58f34ffc2c750215e

Source dataset

uspto-grants-2010_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07659268B2