反应详情

To a stirred and cooled solution of 4 parts of trans-4-amino-3-hydroxy-N,N,γ-trimethyl-α,αdiphenyl-1-piperidinebutanamide in 120 parts of trichloromethane were added 1.26 parts of N,N-diethylethanamine. A solution of 2.3 parts of 3-(trifluoromethyl)benzoyl chloride in 75 parts of trichloromethane was added dropwise. Upon completion, the reaction mixture was stirred overnight at room temperature. A solution of sodium carbonate in water was added. The separated organic layer was washed with water, dried, filtered and evaporated. The residue was taken up in 2,2'-oxybispropane. The precipitated product was filtered off and dried in vacuo at 60° C., yielding 4.9 parts (86.3%) of trans-3-hydroxy-N,N,γ-trimethyl-α,α-diphenyl-4-[[3-(trifluoromethyl)benzoyl]amino]-1-piperidinebutanamide; mp. 140.7° C. (compound 1).

1. stirringUpon completion, the reaction mixture was stirred overnight at room temperature
2. washThe separated organic layer was washed with water
3. customdried
4. filtrationfiltered
5. customevaporated
6. filtrationThe precipitated product was filtered off
7. customdried in vacuo at 60° C.