反应详情

To a solution of methyl 4-oxo-4-[[5-(2-trimethylsilylethynyl)-2-pyridyl]amino]butanoate (26 mg, 0.085 mmol) in methanol, potassium carbonate (5.90 mg, 0.042 mmol) is added in one portion and the reaction mixture is stirred at room temperature for 2 h. The reaction was stopped and the solution was partitioned between ethyl acetate and water. The aqueous layer was separated and extracted with ethyl acetate (2×). The combined organic layer was dried on magnesium sulfate and concentrated under vacuum to give methyl 4-[(5-ethynyl-2-pyridyl)amino]-4-oxo-butanoate A41 (12 mg, 60% yield). 1H NMR (400 MHz, CDCl3) 8.39 (d, 1H), 8.16 (m, 2H), 7.77 (d, 1H), 3.72 (s, 3H), 2.74 (m, 4H) ppm.

1. customthe solution was partitioned between ethyl acetate and water
2. customThe aqueous layer was separated
3. extractionextracted with ethyl acetate (2×)
4. customThe combined organic layer was dried on magnesium sulfate
5. concentrationconcentrated under vacuum