Dimethylformamide → tert-butyl N-[(1R)-1-[[6-(7-methylspiro[2H-benzofuran-3,1'-cyclopropane]-4-yl)oxy-3-pyridyl]carbamoyl]propyl]carbamate

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 (54 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.

1. stirringthe reaction mixture was stirred for 4 hours at room temperature
2. customThe reaction was quenched with water (2 ml)
3. additiondiluted with brine (5 ml)
4. extractionextracted with ethyl acetate (2×10 ml)
5. dry with materialThe organic layer was dried (Na2SO4)
6. filtrationfiltered
7. customevaporated
8. customthe 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

ORD-Eintrag

ord-ddf7305929134f99801daa5bfe4736d8

Quelldatensatz

uspto-grants-2015_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09133175B2