Potassium Carbonate → 2'-Acetyl-3-chloro-4-(3,5-difluoro-pyridin-2-ylmethoxy)-5'-methyl-[1,4']bipyridinyl-2-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 2′-acetyl-3-chloro-4-hydroxy-5′-methyl-[1,4′]bipyridinyl-2-one of part D (500 mg, 1.7 mmol) in N,N-dimethylformamide (3 mL) was added 2-chloromethyl-3,5-difluoro-pyridine (277 mg, 1.7 mmol), potassium carbonate (590 mg, 4.28 mmol) and 18-crown-6 (10 mg) and the reaction was stirred at 60° C. for 4 h. After cooling the solution was partitioned between ethyl acetate and water. The organic layer was washed with water and brine and dried over magnesium sulfate. The solution was filtered and concentrated in vacuo. The crude material was purified using normal phase chromatography (ethyl acetate/heptane) to provide alkylated product as a yellow solid (397 mg): MS (ES) m/e 420 (M+H).

Provenance & Evidence