反应详情

To a solution of (2R)-2-({[(1,1-dimethylethyl)oxy]carbonyl}amino)butanoic acid (94 mg, 0.462 mmol) in dry N,N-Dimethylformamide (2 mL) DIPEA (0.115 mL, 0.661 mmol) and then TBTU (159 mg, 0.496 mmol) were added and the reaction mixture was stirred for 15 minutes at room temperature. 6-(spiro[1-benzofuran-3,1′-cyclopropan]-4-yloxy)-3-pyridinamine (Reference Intermediate 216, 84 mg) was added and the reaction mixture was stirred for 6 hours at the same temperature. The reaction was quenched with brine (2 ml), diluted with water (5 ml) and extracted with ethyl acetate (2×10 ml). The organic layer was washed with ice cold brine (2×5 ml), dried over sodium sulphate, filtered and evaporated. The residue was purified by flash chromatography (Biotage system) on silica gel using a 10 g SNAP column and cyclohexane to cyclohexane/ethyl acetate 7:3 as eluents affording the title compound as a colourless oil (130 mg).

1. stirringthe reaction mixture was stirred for 6 hours at the same temperature
2. customThe reaction was quenched with brine (2 ml)
3. additiondiluted with water (5 ml)
4. extractionextracted with ethyl acetate (2×10 ml)
5. washThe organic layer was washed with ice cold brine (2×5 ml)
6. dry with materialdried over sodium sulphate
7. filtrationfiltered
8. customevaporated
9. customThe residue was purified by flash chromatography (Biotage system) on silica gel using a 10 g SNAP column and cyclohexane to cyclohexane/ethyl acetate 7:3 as eluents