Reaktion #47252

Reaktionsgleichung

1-(3-amino-pyrazol-1-yl)-2-methyl-propan-2-ol

3-t-butoxy-2-[4-(2-methoxy-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl)-propionic acid

1-(3-dimethylaminopropyl)-3-ethylcarbodiimide

1-hydroxybenzotriazole

→

3-t-butoxy-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-2-[4-(2-methoxy-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl)-propionamide

Ausbeute 32.0%

Lösungsmittel

dichloromethane

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGThe reaction mixture was then stirred for 18 h at 25° C., under nitrogen
2. 2
   Waschenwashed with 2N aqueous hydrochloric acid, saturated sodium bicarbonate solution
3. 3
   Trocknena saturated sodium chloride solution and dried over magnesium sulfate
4. 4
   EinengenThe organic layer was concentrated
5. 5
   Sonstigethe crude product was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 12 g; 0% to 100% ethyl acetate/hexanes)

Vorschrift

A solution of 3-t-butoxy-2-[4-(2-methoxy-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl)-propionic acid (100 mg, 0.29 mmol) in dichloromethane (10 mL) was treated with 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (45 mg, 0.29 mmol) and 1-hydroxybenzotriazole (40 mg, 0.30 mmol). The reaction mixture was stirred at 25° C. for 2 h followed by the addition of 1-(3-amino-pyrazol-1-yl)-2-methyl-propan-2-ol (prepared in U.S. Pat. Appl. US2008021032 Example 80, 50 mg, 0.32 mmol). The reaction mixture was then stirred for 18 h at 25° C., under nitrogen. The reaction mixture was diluted with dichloromethane, washed with 2N aqueous hydrochloric acid, saturated sodium bicarbonate solution, a saturated sodium chloride solution and dried over magnesium sulfate. The organic layer was concentrated, and the crude product was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 12 g; 0% to 100% ethyl acetate/hexanes) to afford 3-t-butoxy-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-2-[4-(2-methoxy-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl)-propionamide (45 mg, 32%) as an off-white solid: LR-ES-MS m/z calculated for C25H34N4O6 [M]+ 486, observed [M+H]+ 487; 1H NMR (300 MHz, DMSO-d6) δ ppm 1.05 (s, 6H) 1.12 (s, 9H) 3.64-3.78 (m, 2H) 3.81 (s, 3H) 3.89 (s, 2H) 4.15 (d, J=18.4 Hz, 1H) 4.45 (d, J=18.4 Hz, 1H) 4.67 (s, 1H) 4.73 (s, 1H) 4.80 (dd, J=7.1, 4.7 Hz, 1H) 6.43 (d, J=2.2 Hz, 1H) 6.94-7.09 (m, 1H) 7.13-7.39 (m, 3H) 7.53 (d, J=2.2 Hz, 1H) 10.64 (s, 1H).

Quelle