Potassium Carbonate → tert-butyl [(1S)-2-({5-[5-(cyclopropylmethoxy)-1,3-benzoxazol-2-yl]isoxazol-3-yl}oxy)-1-methylethyl]carbamate

Participants

Reaction Conditions

Reaction Steps

(Bromomethyl)cyclopropane (0.388 mL) was added to a mixture of tert-butyl [(1S)-2-{[5-(5-hydroxy-1,3-benzoxazol-2-yl)isoxazol-3-yl]oxy}-1-methylethyl]carbamate (500 mg), potassium carbonate (552 mg) and DMF (13 mL), and the mixture was stirred at 60° C. for 5 hr. The solvent was evaporated under reduced pressure, water was added thereto, and the mixture was extracted with ethyl acetate. The combined organic layer was washed with saturated brine, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was washed with hexane-ethyl acetate to give the title compound (510 mg).

Provenance & Evidence