反应详情

温度

70 °C

A solution of 3-[5-(1-{[1-(4-chloro-phenyl)-5-methyl-1H-pyrazole-4-carbonyl]-amino}-butyl)-pyridine-3-sulfonyl]-propionic acid methyl ester (51 mg, 0.10 mmol) in THF (2.5 mL) is treated lithium borohydride (13 mg, 0.59 mmol) and heated at 70° C. for 1 hour. After cooling to room temperature, the reaction is quenched by slow addition of 10 mL of water and extracted with EtOAc (2×25 mL). The combined organic layers are washed with brine (50 mL), dried over magnesium sulfate, filtered and concentrated in vacuo. Purification by flash chromatography on silica gel (eluted with 50 to 100% EtOAc/hexanes) followed by preparative reverse phase HPLC (eluted with 5 to 95% CH3CN/H2O and 0.1% TFA as additive) affords 1-(4-chloro-phenyl)-5-methyl-1H-pyrazole-4-carboxylic acid {1-[5-(3-hydroxy-propane-1-sulfonyl)-pyridin-3-yl]-butyl}-amide (8.0 mg, 17%).

1. temperatureAfter cooling to room temperature
2. customthe reaction is quenched by slow addition of 10 mL of water
3. extractionextracted with EtOAc (2×25 mL)
4. washThe combined organic layers are washed with brine (50 mL)
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customPurification by flash chromatography on silica gel (eluted with 50 to 100% EtOAc/hexanes)
9. washfollowed by preparative reverse phase HPLC (eluted with 5 to 95% CH3CN/H2O and 0.1% TFA as additive)