Methyl iodide → 6-chloro-5-fluoro-1-methyl-1H-pyrrolo[2,3-b]pyridine

To a solution of 6-chloro-5-fluoro-1H-pyrrolo[2,3-b]pyridine (4.15 g, 24.33 mmol) in DMF (50 mL), under a nitrogen atmosphere, is added potassium carbonate (6.73 g, 48.66 mmol), followed by methyl iodide (2.27 mL, 36.49 mmol), and reaction heated to 70° C. for 2 h. The reaction is cooled, poured onto brine (ca. 50 mL) and the product extracted with CHCl3 (ca. 2×30 mL). The combined organic extracts are dried over magnesium sulphate, filtered, and concentrated in vacuo to give a brown solid. This is purified by column chromatography on silica, eluting with 0 to 50% DCM in hexane, to give the title compound as a white solid (1.274 g, 6.90 mmol). MS (m/z): 185/187 (M+1).

1. temperatureThe reaction is cooled
2. additionpoured onto brine (ca. 50 mL)
3. extractionthe product extracted with CHCl3 (ca. 2×30 mL)
4. dry with materialThe combined organic extracts are dried over magnesium sulphate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customto give a brown solid
8. customThis is purified by column chromatography on silica
9. washeluting with 0 to 50% DCM in hexane

ORD-Eintrag

ord-700d24cee10142d2b4eb6f1218a356fd

Quelldatensatz

uspto-grants-2014_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08778946B2