Trifluoroacetic acid → (2R)-2-(2-aminoethylamino)-3-phenylpropionic acid methyl ester
Reaction equation
[CH3:1][O:2][C:3](=[O:23])[C@H:4]([NH:12][CH2:13][CH2:14][NH:15]C(OC(C)(C)C)=O)[CH2:5][C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1.FC(F)(F)C(O)=O>C(Cl)Cl>[CH3:1][O:2][C:3](=[O:23])[C@H:4]([NH:12][CH2:13][CH2:14][NH2:15])[CH2:5][C:6]1[CH:7]=[CH:8][CH:9]=[CH:10][CH:11]=1Participants
4
Procedure
(2R)-2-(2-(tert-Butoxycarbonylamino)ethylamino)-3-phenylpropionic acid methyl ester (1.32 g; 4.094 mmol) was dissolved in methylene chloride (10 ml) and trifluoroacetic acid (10 ml) was added. The reaction mixture was stirred for 1 hour at room temperature. The solvent was evaporated in vacuo and the residue was dissolved in methylene chloride (5 ml) and evaporated in vacuo. Methylene chloride (5 ml) was added and evaporated in vacuo to afford 1.14 g of (2R)-2-(2-aminoethylamino)-3-phenylpropionic acid methyl ester as a trifluoroacetate salt.