Dimethylformamide → tert-butyl N-[(1R)-1-[[6-[(2,2-dimethyl-3H-benzofuran-4-yl)oxy]-3-pyridyl]carbamoyl]propyl]carbamate

Participants

Reaction Steps

To a solution of (2R)-2-({[(1,1-dimethylethyl)oxy]carbonyl}amino)butanoic acid (17.84 mg, 0.088 mmol) in dry N,Ndimethylformamide (DMF) (1 mL), DIPEA (25.6 μl, 0.146 mmol) and then HATU (37.8 mg, 0.099 mmol) were added and the reaction mixture was stirred for 15 minutes at room temperature under argon. Then 6-[(3,3-dimethyl-2,3-dihydro-1-benzofuran-4-yl)oxy]-3-pyridinamine (Intermediate 207, 15 mg, 0.059 mmol) was added and the reaction mixture was left overnight under stirring at 35° C. under argon. The reaction mixture was evaporated. Brine (4 ml) was added and it was extracted 3 times with ethyl acetate (3×5 ml). Combined organic layers were dried over Na2SO4, filtered and evaporated and the residue was purified by flash chromatography (Companion system, 12 g silica cartridge) with cyclohexane/ethyl acetate as eluents from 100:0 to 70:30 affording the title compound (18 mg).

Provenance & Evidence