反应详情

0.43 g (0.84 mmol) of tert-butyl [(R)-2-(4-butyryl-4-cyclohexylpiperidin-1-yl)-1-(4-methoxybenzyl)-2-oxoethyl]carbamate is diluted in 8 ml of DCM and 2 ml of trifluoroacetic acid. The solution is stirred for 1 hour 30 minutes at room temperature and then poured into 1N sodium hydroxide solution and extracted with dichloromethane. The organic phase is dried, filtered and then concentrated. 300 mg of 1-{1-[(R)-2-amino-3-(4-methoxyphenyl)propionyl]-4-cyclohexylpiperidin-4-yl}butan-1-one in the form of a colourless oil are obtained in a yield of 86%.

1. extractionextracted with dichloromethane
2. customThe organic phase is dried
3. filtrationfiltered
4. concentrationconcentrated