5-Bromo-N-methoxy-N-methylpyridine-3-carboxamide → (5-Bromopyridin-3-yl)(7-isopropyl-7H-pyrrolo[2,3-d]pyrimidin-5-yl)methanone

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 5-iodo-7-isopropyl-7H-pyrrolo[2,3-d]pyrimidine (Preparation 93, 4.85 g, 16.9 mmol) in THF (90 mL) at 0° C., under nitrogen was added isopropyl magnesium chloride (9.28 mL, 18.6 mmol, 2.0 M in diethyl ether). The mixture was stirred at 0° C. for 1 hour then a solution of 5-bromo-N-methoxy-N-methylnicotinamide (Preparation 227, 4.55 g, 18.6 mmol) in THF (10 mL) was added dropwise at 0° C. The mixture was warmed to room temperature and stirred for 16 hours. The reaction mixture was quenched with saturated aqueous ammonium chloride (200 mL) and extracted with ethyl acetate (3×200 mL). The combined organics were concentrated under reduced pressure and purified by silica gel column chromatography eluting with gradient of EtOAc:DCM 95:5 to 50:50 to afford a light brown oil. The crude material was recrystallised using EtOAc:heptane (15:200 mL) to afford the title compound as a white solid in 33% yield, 2.16 g.

Provenance & Evidence