反应详情

N-methylmorpholine (0.873 mL) was added to a solution of 1-(tert-butoxycarbonyl)-L-proline (1.28 g) in 1,2-dichloroethane (10 mL) under ice-cooling, followed by further addition of pivaloyl chloride (0.734 mL). The reaction liquid was stirred for 1 hour, and N-methylmorpholine (1.09 mL) and 1-cyclohexyl-1,2,3,4-tetrahydroisoquinoline hydrochloride (1.00 g) were then added thereto. The mixture was stirred at room temperature for 15 hours. To the reaction solution were added EtOAc and an aqueous 1 M HCl solution. The organic layer was washed with water, a saturated aqueous sodium hydrogen carbonate solution, and saturated brine, dried over magnesium sulfate, and filtered. The filtrate was concentrated under reduced pressure to obtain tert-butyl (2S)-2-[(1-cyclohexyl-3,4-dihydroisoquinolin-2(1H)-yl)carbonyl]pyrrolidine-1-carboxylate (1.79 g).

1. temperaturecooling
2. customThe reaction liquid
3. stirringThe mixture was stirred at room temperature for 15 hours
4. washThe organic layer was washed with water
5. dry with materiala saturated aqueous sodium hydrogen carbonate solution, and saturated brine, dried over magnesium sulfate
6. filtrationfiltered
7. concentrationThe filtrate was concentrated under reduced pressure