[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]([CH2:10][C:11](=[O:15])[C:12]([OH:14])=[O:13])=[CH:2]1.[CH2:16]1CCN2C(=NCCC2)C[CH2:17]1.C(Br)C>C1C=CC=CC=1>[CH2:16]([O:13][C:12](=[O:14])[C:11]([CH2:10][C:3]1[C:4]2[C:9](=[CH:8][CH:7]=[CH:6][CH:5]=2)[NH:1][CH:2]=1)=[O:15])[CH3:17]Following the same method as previously described, 1,0 g 3-indole-pyruvic acid were reacted with 1,5 ml DBU and 790 microliters ethylbromide. In this case the benzene solution appeared red orange. After flash chromatography purification the ethyl ester was obtained with a yield of about 70%.
Wird geladen…