Dimethylformamide → tert-butyl N-[(1R)-1-[[6-(7-methylspiro[2H-benzofuran-3,1'-cyclopropane]-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 (36 mg, 0.18 mmol) in dry DMF (1 ml) DIPEA (52 μl, 0.3 mmol) and then HATU (65 mg, 0.17 mmol) were added and the reaction mixture was stirred for 15 minutes at r.t. 6-(7-methylspiro[2H-benzofuran-3,1′-cyclopropane]-4-yl)oxypyridin-3-amine (Intermediate 15, 40 mg, 0.15 mmol) was then added and the reaction mixture was stirred for 4 hours at room temperature. The reaction was quenched with water (2 ml) diluted with brine (5 ml) and extracted with ethyl acetate (2×10 ml). The organic layer was dried (Na2SO4), filtered and evaporated and the residue was purified by flash chromatography (Biotage system) on silica gel using a 10 g SNAP column and cyclohexane/ethyl acetate 90:10 to cyclohexane/ethyl acetate 60:40 as eluents affording the title compound (57 mg) as a white solid.

Provenance & Evidence