反应详情

A solution of N-boc-4-piperidinemethanol (0.500 g, 2.322 mmol) in DMF (10 mL) was added drop wise to a suspension of sodium hydride (60% in mineral oil) (0.186 g, 4.645 mmol) in dry DMF (15 mL) at 0 C. The mixture was stirred at 0 C for 15 minutes and room temperature for 10 minutes before being cooled down again and (bromomethyl)cyclopropane (0.227 mL, 2.322 mmol) was added drop wise. The reaction mixture was stirred at 0 C for 10 minutes, room temperature for 1 h and 80 C for 4 h. The reaction mixture was diluted with EtOAc (60 mL) and washed with water (3×20 mL). The aqueous washes were combined and re-extracted with EtOAc (3×20 mL). The organic extracts were combined, dried over sodium sulfate, filtered and evaporated to provide the title compound as a colorless oil (0.614 g, 98%). Method B HPLC-MS: MH+ requires m/z=270 Found: m/z=214 (MH+-tBu), Rt=2.33 min (83%).

1. temperaturebefore being cooled down again
2. stirringThe reaction mixture was stirred at 0 C for 10 minutes, room temperature for 1 h
3. wait80 C for 4 h
4. washwashed with water (3×20 mL)
5. extractionre-extracted with EtOAc (3×20 mL)
6. dry with materialdried over sodium sulfate
7. filtrationfiltered
8. customevaporated