Trifluoroacetic acid → (R)-2,5-dihydro-1H-pyrrole-2-carboxylic acid ethyl ester trifluoroacetate
Reaction equation
[CH3:1][CH2:2][O:3][C:4]([C@H:6]1[CH:10]=[CH:9][CH2:8][N:7]1C(OC(C)(C)C)=O)=[O:5].[F:18][C:19]([F:24])([F:23])[C:20]([OH:22])=[O:21]>>[F:18][C:19]([F:24])([F:23])[C:20]([OH:22])=[O:21].[CH2:2]([O:3][C:4]([C@H:6]1[CH:10]=[CH:9][CH2:8][NH:7]1)=[O:5])[CH3:1]Participants
3
Procedure
(1:1) 1.5 g (0.006 mol) (R)-2,5-dihydro-pyrrole-1,2-dicarboxylic acid 1-tert-butyl ester 2-ethyl ester were dissolved at 5° C. in 10 ml trifluoroacetic acid and stirring was continued at room temperature for 3 hours. Evaporation of the solvent in vacuo gave 2.05 g (quant.) of (R)-2,5-dihydro-1H-pyrrole-2-carboxylic acid ethyl ester trifluoroacetate (1:1) as a yellow oil.
Workup
- customEvaporation of the solvent in vacuo