反应详情

9.33 g of sodium boron hydride was suspended in 200 ml of tetrahydrofuran, and added thereto was boron trifluoride diethyl complex under ice-cooling. The mixture was stirred as such under ice-cooling for 30 minutes, and then, 150 ml of a tetrahydrofuran solution containing 40 g of trans-4-(tert-butoxycarbonylamino)cyclohexane carboxylic acid was added thereto under ice-cooling. The mixture was stirred at room temperature for 4 hours, and the reaction mixture was poured into ice water, and extracted with chloroform. The extract was washed with water and brine, dried over anhydrous sodium sulfate, and the solvent was removed under reduced pressure. The residue was recrystallized from ethyl acetate-hexane to obtain 20 g of N-tert-butoxycarbonyl-trans-4-(hydroxymethyl)cyclohexylamine.

1. additionadded
2. temperaturecooling
3. temperaturecooling for 30 minutes
4. additionwas added
5. temperatureunder ice-cooling
6. stirringThe mixture was stirred at room temperature for 4 hours
7. extractionextracted with chloroform
8. washThe extract was washed with water and brine
9. dry with materialdried over anhydrous sodium sulfate
10. customthe solvent was removed under reduced pressure
11. customThe residue was recrystallized from ethyl acetate-hexane