反应详情

A solution of 25.5 g (184.5 mmol) of potassium carbonate in 130 ml of water was added to 15.0 g (48.5 mmol) of (S)-4-formyl-1-(trifluoroacetyl)-piperazine-2-carboxylic acid tert-butylamide in 130 ml of isobutyl alcohol and the mixture was heated at 60° to 65° C. for 1 hour. After phase separation, the aqueous phase was extracted with 100 ml of isobutyl alcohol and the combined organic phases were evaporated to give 14.10 g of the crude title compound (still containing solvent) in the form of a light yellow oil. Other data concerning the title compound was:

1. temperaturethe mixture was heated at 60° to 65° C. for 1 hour
2. customAfter phase separation
3. extractionthe aqueous phase was extracted with 100 ml of isobutyl alcohol
4. customthe combined organic phases were evaporated