Sodium Bicarbonate → 6-Chloro-4-iodopyridin-3-ol

Temperature

60 °C

2-Chloro-4-iodo-5-methoxymethoxy-pyridine (0.8 g, 2.7 mmol) was dissolved in THF (4 mL) and 3N HCl (6 mL). The mixture was heated to 60° C. with magnetic stirring. Heating was maintained for 3 hours. The mixture was cooled to room temperature and the pH was adjusted to 7 with the slow addition of saturated aqueous sodium bicarbonate. The result was extracted with EtOAc (3×50 mL) dried over Na2SO4, filtered and concentrated. The solid was suspended in EtOAc and stirred for 12 hours at room temperature. The mixture was filtered and the filtrate was concentrated to yield an off white solid (0.63 g, 93%). 1H NMR (400 MHz, DMSO-d6): δ 11.10 (br s, 1H), 7.89 (s, 2H).

1. temperatureHeating
2. temperaturewas maintained for 3 hours
3. temperatureThe mixture was cooled to room temperature
4. extractionThe result was extracted with EtOAc (3×50 mL)
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated
8. filtrationThe mixture was filtered
9. concentrationthe filtrate was concentrated

ORD record

ord-9192c8d4f6924fa080a395d8054229f9

Source dataset

uspto-grants-2006_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07151105B2