Sodium borohydride → (4-(4-Chloro-2-fluorophenyl)pyridin-3-yl)methanol

Temperatur

0 °C

To a solution of 4-(4-chloro-2-fluorophenyl)nicotinaldehyde (3 g, 12.73 mmol) in a mixture of methanol (5 mL) and tetrahydrofuran (5 mL) cooled to 0° C. was added NaBH4 (0.722 g, 19.10 mmol) and the solution stirred for 30 min. The reaction was quenched by addition of water (10 mL). The solution was extracted with ethyl acetate (3×15 mL). The combined organic extracts were washed with water (1×15 mL) and brine (1×15 mL), dried with sodium sulfate and concentrated under reduced pressure to yield (4-(4-chloro-2-fluorophenyl)pyridin-3-yl)methanol that was used without further purification in the next step. LCMS (ESI) m/e 238 [(M+H)+, calcd for C12H10ClFNO 238.0].

1. customThe reaction was quenched by addition of water (10 mL)
2. extractionThe solution was extracted with ethyl acetate (3×15 mL)
3. washThe combined organic extracts were washed with water (1×15 mL) and brine (1×15 mL)
4. dry with materialdried with sodium sulfate
5. concentrationconcentrated under reduced pressure

ORD-Eintrag

ord-34850f3fb97c450fa70276d371dbf174

Quelldatensatz

uspto-grants-2014_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08703953B2