Water → 3,4-Dichloro-5-fluoro-2-picoline

Temperatur

0 °C

To 0.87 g (6 mmol) of 4-chloro-5-fluoro-2-picoline, the product of Example 66, in 20 mL of chloroform cooled to -45° C., is added 0.75 mL of t-butylhypochlorite. The reaction mixture is stirred at -45° C. for 2 hours and at 0° C. for 2 hours. The reaction mixture is then poured into water and the resultant aqueous mixture is extracted with methylene chloride. The organic solution is dried over anhydrous magnesium sulfate, filtered, concentrated under reduced pressure and distilled to afford the title compound.

1. extractionthe resultant aqueous mixture is extracted with methylene chloride
2. dry with materialThe organic solution is dried over anhydrous magnesium sulfate
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure
5. distillationdistilled

ORD-Eintrag

ord-1ecb12c0a720485081b2a903dedaad68

Quelldatensatz

uspto-grants-1998_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05726182