反应详情

Combine (S)-3-(3,4-dichlorophenyl)-3-(2-hydroxyethyl)pyrrolidine (R,R)-di-p-anisoyltartaric acid salt (1.20 g, 1.77 mmol) and sodium bicarbonate (0.75 g, 8.9 mmol) in acetone/water (5 mL/5 mL). Cool in an ice bath. Add 2-methoxy-5-(1H-tetrazol-1-yl)benzoyl chloride (0.37 g, 1.6 mmol) in acetone (20 mL). After 30 minutes, warm to ambient temperature. After 5 hours, filter the reaction mixture and extract the filtrate with ethyl acetate. Extract the organic layer with a saturated aqueous sodium bicarbonate solution and then brine. Dry the organic layer over MgSO4, filter, and evaporate in vacuo to give residue. Chromatograph the residue on silica gel eluting sequentially with ethyl acetate, 3% methanol/dichloromethane, and then 6% methanol/dichloromethane to give the title compound: Rf=0.38 (silica gel, 6% methanol/dichloromethane).

1. temperatureCool in an ice bath
2. waitAfter 5 hours
3. filtrationfilter the reaction mixture
4. extractionextract the filtrate with ethyl acetate
5. extractionExtract the organic layer with a saturated aqueous sodium bicarbonate solution
6. dry with materialDry the organic layer over MgSO4
7. filtrationfilter
8. customevaporate in vacuo
9. customto give residue