反应详情

Trifluoroacetic acid (6.17 mL, 83.0 mmol) was added to a solution of 4-amino-4-carbamoyl-piperidine-1-carboxylic acid tert-butyl ester (2.02 g, 8.30 mmol) in dichloromethane (16.6 mL), and the mixture was stirred at room temperature for 1.5 hours. The reaction solution was concentrated under reduced pressure. The residue was dissolved in methanol (2.00 mL), repeatedly concentrated under reduced pressure twice and dried under reduced pressure to give 4-amino-piperidine-4-carboxylic amide 2TFA salt as a colorless substance (3.25 g).

1. concentrationThe reaction solution was concentrated under reduced pressure
2. dissolutionThe residue was dissolved in methanol (2.00 mL)
3. concentrationrepeatedly concentrated under reduced pressure twice
4. customdried under reduced pressure