反应详情

2-[4-({[2-(Benzo[1,3]dioxol-5-yloxy)-pyridine-3-carbonyl]-amino}-methyl)-phenyl]-2-methyl-propionic acid methyl ester (0.451 g) was suspended in tertiary butanol (30 mL). Sodium hydroxide (1.68 mL of a 6N aqueous solution) was added to the suspension, and the reaction mixture was heated to reflux. After 1 hour the reaction mixture was cooled to ambient temperature, the solvent removed in vacuo, water added (20 mL), and the pH adjusted from to 3 with concentrated hydrochloric acid. The solution was subsequently extracted with ethyl acetate (7×50 mL). The combined organics were dried over magnesium sulfate, filtered, and concentrated in vacuo to yield the crude product (0.490 g). The crude product was purified by silica gel chromatography (acetic acid:methanol:dichloromethane=1:10:89) to yield pure title compound (0.409 g).

1. temperaturethe reaction mixture was heated to reflux
2. customthe solvent removed in vacuo, water
3. additionadded (20 mL)
4. extractionThe solution was subsequently extracted with ethyl acetate (7×50 mL)
5. dry with materialThe combined organics were dried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customto yield the crude product (0.490 g)
9. customThe crude product was purified by silica gel chromatography (acetic acid:methanol:dichloromethane=1:10:89)