Hydroxide → 2-Bromo-3-methoxypyridine

Temperature

50 °C

5.93 g (90.0 mmol) of 85% powdered potassum [sic] hydroxide are suspended in 30 ml of DMSO and heated to 50° C. under argon as the inert gas. 2.54 g (14.6 mmol) of 2-bromo-3-hydroxypyridine dissolved in 10 ml of DMSO are added dropwise to this suspension. This solution is stirred for another 10 minutes, after which 12.3 g (5.30 ml, 33.1 mmol) of methyl iodide are added dropwise over a period of 2 minutes. The addition takes place at such a rate that the reaction temperature is always between 50°-55° C. The reaction [sic] is then stirred at this temperature for another 10 minutes. The finished reaction solution is finally poured onto 100 ml of ground ice. The crude product obtained is recrystallized from ether/petroleum ether (4:1).

1. additionare added dropwise to this suspension
2. additionThe addition
3. customis always between 50°-55° C
4. customThe reaction [sic]
5. stirringis then stirred at this temperature for another 10 minutes
6. customThe finished reaction solution
7. additionis finally poured onto 100 ml of ground ice

ORD record

ord-b80fb35b3a4e49b6a594f6f936966f90

Source dataset

uspto-grants-1993_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05266700