反应详情

A mixture of (4-fluoro-phenyl)-(3-fluoro-phenylamino)-acetic acid (I83) (510 mg, 1.94 mmol), (R)-quinuclidin-3-ol (246 mg, 1.94 mmol), HOBT (356 mg, 2.32 mmol) and DCC (480 mg, 2.32 mmol) in THF (10 mL) is stirred at RT overnight (UPLC-MS monitoring: complete conversion). The solvent is evaporated, the crude is dissolved in EtOAc and the insoluble is filtered off. The clear solution is washed with 1N K2CO3 and then with brine. The organic layer is dried over Na2SO4, filtered and evaporated. The crude is purified by silica gel chromatography (EtOAc/MeOH=8/2) to give the title compound as a yellow oil (360 mg, 50% yield, mixture of diastereoisomers).

1. customThe solvent is evaporated
2. dissolutionthe crude is dissolved in EtOAc
3. filtrationthe insoluble is filtered off
4. washThe clear solution is washed with 1N K2CO3
5. dry with materialThe organic layer is dried over Na2SO4
6. filtrationfiltered
7. customevaporated
8. customThe crude is purified by silica gel chromatography (EtOAc/MeOH=8/2)