Triethylamine → tert-butyl [(1S)-2-(4-{[5-(cyclopropylmethoxy)pyridin-2-yl]ethynyl}-3,5-difluorophenoxy)-1-methylethyl]carbamate

Participants

Reaction Conditions

Reaction Steps

A mixture of tert-butyl [(1S)-2-(4-ethynyl-3,5-difluorophenoxy)-1-methylethyl]carbamate (2.5 g), 2-bromo-5-(cyclopropylmethoxy)pyridine (1.8 g), copper iodide (I) (0.15 g), dichloropalladium-triphenylphosphine (1:2) (0.56 g) and triethylamine (2.2 mL) in toluene (20 mL) was stirred at 100° C. overnight under argon atmosphere. After cooling to room temperature, the mixture was filtered through a pad of Celite. The filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate) to afford the title compound (1.3 g).

Provenance & Evidence