反应详情

Combine tert-butyl 4-(4-(tetrahydro-2H-pyran-4-yl)-1H-imidazol-2-yl)piperidine-1-carboxylate (101.10 g, 301.39 mmol) and freshly ground potassium hydroxide (50.73 g, 3.0 eq) in dimethyl sulfoxide (500 mL). Stir for 15 minutes, then add sodium iodide (49.69 g, 1.1 eq). Add a solution of 1-(2-chloro-ethyl)-pyrrolidinium chloride (66.64 g, 1.3 eq) in dimethyl sulfoxide (1.01 L) and stir for four hours at room temperature. Pour the contents of the reaction into an ice/water mixture (˜1 L) and extract with methyl tert-butyl ether. Dry the organics over anhydrous magnesium sulfate, filter, and concentrate in vacuo. Purify by HPLC (Chiralpak AD basic, hexane/ethanol 9:1) to give tert-butyl 4-(4-(tetrahydro-2H-pyran-4-yl)-1-(2-(pyrrolidin-1-yl)ethyl)-1H-imidazol-2-yl)piperidine-1-carboxylate (82.0 g, 63%). MS (ES) m/z=433 [M]+.

1. stirringstir for four hours at room temperature
2. additionPour
3. extractionextract with methyl tert-butyl ether
4. dry with materialDry the organics over anhydrous magnesium sulfate
5. filtrationfilter
6. concentrationconcentrate in vacuo
7. customPurify by HPLC (Chiralpak AD basic, hexane/ethanol 9:1)