反应详情

To a solution of (S)-pyrrolidine-2-carboxylic acid (4-tert-butyl-thiazol-2-yl)-amide; hydrochloride (0.310 g; 1.070 mmol) in 1,2-dichloroethane (2 mL) was added tetrahydro-pyran-4-carbaldehyde (0.244 g; 2.140 mmol), acetic acid (0.2 mL; 3.497 mmol), and sodium sulfate(5-10 equivalents). The mixture is stirred for 30-45 minutes before adding sodium triacetoxyborohydride (0.454 g; 2.140 mmol) and stirring overnight at room temperature. After this time, the mixture is filtered through a plug of silica/Celite® and concentrated in vacuo. Crude material is purified by preparative HPLC. Product fractions are pooled and concentrated in vacuo to afford title compound as an oil. ESI m/z 352 [M+H]+

1. stirringstirring overnight at room temperature
2. filtrationAfter this time, the mixture is filtered through a plug of silica/Celite®
3. concentrationconcentrated in vacuo
4. customCrude material is purified by preparative HPLC
5. concentrationconcentrated in vacuo