反应详情

To a stirred solution of cyclopropylamine (1 g, 13.15 mmol) in dichlorethane (20 mL) were added 2-(tert-butyl-dimethylsilanyloxy)acetaldehyde (2.3 mg, 2.30 mmol) and acetic acid (0.08 mL, 0.29 mmol) at 0° C. Stirring was continued for 24 h at room temperature and NaBH4 (995 mg, 26.29 mmol) was added portion-wise at 0° C. The reaction mixture was further stirred for 2 h at room temperature, quenched with water and extracted with dichloromethane (3×30 mL). The organic part was dried and concentrated to yield a crude product which was purified by Combi-Flash column (eluted at 10-20% ethyl acetate in hexane) to get [2-(tert-butyl-dimethylsilanyloxy)-ethyl]-cyclopentylamine (8e) (1.2 g, 37.48%) as a yellow oil.

1. stirringThe reaction mixture was further stirred for 2 h at room temperature
2. customquenched with water
3. extractionextracted with dichloromethane (3×30 mL)
4. customThe organic part was dried
5. concentrationconcentrated
6. customto yield a crude product which
7. customwas purified by Combi-Flash column (eluted at 10-20% ethyl acetate in hexane)