反应详情

温度

0 °C

To a solution of cis-4-(tert-butoxycarbonylamino)cyclohexanecarboxylic acid (54.58 g, 224 mmol) in dry DMF (200 mL) was added 1,1′-carbonyldiimidazole reagent grade (70 g, 432 mmol) portionwise with stirring. After the evolution of CO2 had ceased, the resulting solution was stirred at RT for 10 minutes. The solution was cooled to 0° C., and isopropylamine (38.5 mL, 449 mmol) was added with stirring. The reaction was stirred at 0° C. for 10 minutes and at RT for 24 hours. The reaction was diluted slowly with water (1 L) with stirring in an ice-water bath and then allowed to age for 1 hour. The precipitate was collected by filtration, washed with water, and dried in vacuo to generate tert-butyl cis-4-(isopropylcarbamoyl)cyclohexyl-carbamate as a white solid (39.11 g, 61% yield).

1. stirringthe resulting solution was stirred at RT for 10 minutes
2. stirringwith stirring
3. stirringThe reaction was stirred at 0° C. for 10 minutes and at RT for 24 hours
4. stirringwith stirring in an ice-water bath
5. filtrationThe precipitate was collected by filtration
6. washwashed with water
7. customdried in vacuo