[F:1][C:2]1[CH:3]=[C:4]([CH:41]=[CH:42][CH:43]=1)[CH2:5][N:6]1[C:14]2[C:9](=[CH:10][C:11]([NH:15][C:16]3[C:25]4[C:20](=[CH:21][CH:22]=[CH:23][C:24]=4[CH2:26][N:27]4[CH2:32][CH2:31][CH:30]([NH:33]C(=O)OC(C)(C)C)[CH2:29][CH2:28]4)[N:19]=[CH:18][N:17]=3)=[CH:12][CH:13]=2)[CH:8]=[N:7]1>C(O)(C(F)(F)F)=O.C(Cl)Cl>[F:1][C:2]1[CH:3]=[C:4]([CH:41]=[CH:42][CH:43]=1)[CH2:5][N:6]1[C:14]2[C:9](=[CH:10][C:11]([NH:15][C:16]3[C:25]4[C:20](=[CH:21][CH:22]=[CH:23][C:24]=4[CH2:26][N:27]4[CH2:32][CH2:31][CH:30]([NH2:33])[CH2:29][CH2:28]4)[N:19]=[CH:18][N:17]=3)=[CH:12][CH:13]=2)[CH:8]=[N:7]121A (52 mg, 0.089 mmoL) was dissolved in a mixture of TFA/DCM (2 ml/2 ml) and stirred at rt for 10 min, then concentrated. The residue was purified by prep HPLC to give 21B (38 mg, 88%). It has an analytical HPLC retention time=1.93 min (Chromolith SpeedROD column 4.6×50 mm, 10-90% aqueous methanol containing 0.1% TFA over 4 minutes, 4 mL/min, monitoring at 254 nm) and a LC/MS M++H=482+.
Wird geladen…