反应详情

3-[(Carboxy-phenyl-methyl)-amino]-benzoic acid ethyl ester hydrochloride (I66) (161 mg, 0.48 mmol), 2-(1H-benzo[d][1,2,3]triazol-1-yl)-1,1,3,3-tetramethylisouronium hexafluorophosphate(V) (218 mg, 0.57 mmol), and HOBT (88 mg, 0.57 mmol) are dissolved in dry THF (10 mL). (R)-Quinuclidin-3-ol (61.0 mg, 0.48 mmol) and DIPEA (0.17 mL, 0.96 mmol) are added and the mixture is stirred under inert atmosphere overnight. THF is evaporated and the crude residue is dissolved in EtOAc and washed with sat. NaHCO3, water and brine. The recovered organic layer is dried (Na2SO4), filtered and evaporated. The crude is purified by flash chromatography (DCM/MeOH=95/5) to afford the title compound as a yellow oil (154 mg, 79% yield, mixture of diastereoisomers).

1. customTHF is evaporated
2. dissolutionthe crude residue is dissolved in EtOAc
3. washwashed with sat. NaHCO3, water and brine
4. dry with materialThe recovered organic layer is dried (Na2SO4)
5. filtrationfiltered
6. customevaporated
7. customThe crude is purified by flash chromatography (DCM/MeOH=95/5)