Trifluoroacetic acid → 4-((S)-2-Amino-4-benzyloxy-butyryl)-piperazine-1-carboxylic acid ethyl ester
Reaction equation
[CH2:1]([O:3][C:4]([N:6]1[CH2:11][CH2:10][N:9]([C:12](=[O:32])[C@@H:13]([NH:24]C(OC(C)(C)C)=O)[CH2:14][CH2:15][O:16][CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)[CH2:8][CH2:7]1)=[O:5])[CH3:2].C(O)(C(F)(F)F)=O>ClCCl>[CH2:1]([O:3][C:4]([N:6]1[CH2:11][CH2:10][N:9]([C:12](=[O:32])[C@@H:13]([NH2:24])[CH2:14][CH2:15][O:16][CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)[CH2:8][CH2:7]1)=[O:5])[CH3:2]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
To a solution of 1.23 g 4-((S)-4-benzyloxy-2-tert-butoxycarbonylamino-butyryl)-piperazine-1-carboxylic acid ethyl ester in 7 ml dichloromethane were added 2 ml TFA. After stirring for 12 h and evaporation of the solvents the crude trifluoroacetate salt was obtained as colorless oil. Yield: 1.30 g.