4-Piperidone → 1-(2-Chloro-4-fluorophenyl)piperidin-4-one

Temperatur

120 °C

To a round bottom flask was added palladium(II) acetate (0.012 g, 0.06 mmol), dicyclohexyl(2',4',6'-triisopropylbiphenyl-2-yl)phosphine (0.026 g, 0.06 mmol), and sodium tert-butoxide (0.213 g, 2.21 mmol). Added 5 mL toluene/t-butanol mix and purged with nitrogen. Added piperidin-4-one (0.15 g, 1.11 mmol), in 3 mL tol/tbuoh (slurry), followed by 1-bromo-2-chloro-4-fluorobenzene (0.255 g, 1.22 mmol), in 2 mL tol/tbuoh. Flushed with additional nitrogen and then heated to 120oC overnight. Let reaction mixture cool to room temperature and filtered through Celite. Rinsed repeatedly with EtOAc and concentrated in vacuo. Purified via ISCO 12g SiO2 column using 0-20% hexanes/ethyl acetate. Fractions 19 and 20 were combined and concentrated to afford a white solid. NMR (I200805922.42) shows a mess. Discarded. Will try another way.

ORD-Eintrag

ord-5c5d7fac90d14102bcad7fe6bdad56a8

Quelldatensatz

750 AstraZeneca ELN dataset

Originallink

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