C([O:5][C:6]([CH:8]1[CH2:12][CH:11]([O:13][C:14]2[C:23]3[C:18](=[CH:19][C:20]([O:24][CH3:25])=[CH:21][CH:22]=3)[N:17]=[C:16]([C:26]3[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=3)[N:15]=2)[CH2:10][CH:9]1[C:32](=[O:44])[NH:33][C:34]1([C:39]([O:41][CH2:42][CH3:43])=[O:40])[CH2:36][CH:35]1[CH:37]=[CH2:38])=[O:7])(C)(C)C.FC(F)(F)S(O)(=O)=O>ClCCl.C([SiH](CC)CC)C>[CH2:42]([O:41][C:39]([C:34]1([NH:33][C:32]([CH:9]2[CH2:10][CH:11]([O:13][C:14]3[C:23]4[C:18](=[CH:19][C:20]([O:24][CH3:25])=[CH:21][CH:22]=4)[N:17]=[C:16]([C:26]4[CH:27]=[CH:28][CH:29]=[CH:30][CH:31]=4)[N:15]=3)[CH2:12][CH:8]2[C:6]([OH:7])=[O:5])=[O:44])[CH2:36][CH:35]1[CH:37]=[CH2:38])=[O:40])[CH3:43]Compound 16 (780 mg, 1.29 mmol) was dissolved in dichloromethane (20 mL) and triethylsilane (0.4 mL). Trifluoromethanesulfonic acid was added dropwise at room temperature. The mixture was then left for 2 h at room temperature. Removal of the solvent gave pure title product (700 mg, 99%) MS (M+H)+ 546.
Wird geladen…