[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH2:11][C@@H:10]([C:14]2[CH:19]=[CH:18][C:17]([N:20]3[CH:28]=[C:27]4[C:22]([C:23]([C:29](O)=[O:30])=[CH:24][CH:25]=[CH:26]4)=[N:21]3)=[CH:16][CH:15]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(=O)(OC(C)(C)C)OC(C)(C)C.[N:44]1C=CC=CC=1.C(=O)(O)[O-].[NH4+].Cl>C(Cl)Cl>[NH2:44][C:29]([C:23]1[C:22]2[C:27](=[CH:28][N:20]([C:17]3[CH:18]=[CH:19][C:14]([C@@H:10]4[CH2:11][CH2:12][CH2:13][N:8]([C:6]([O:5][C:1]([CH3:3])([CH3:4])[CH3:2])=[O:7])[CH2:9]4)=[CH:15][CH:16]=3)[N:21]=2)[CH:26]=[CH:25][CH:24]=1)=[O:30]F2 was dissolved in DCM (0.35M) and di tert-butyl carbonate (1.3 eq) and pyridine (1.0 eq) added at RT. After 30 minutes ammonium bicarbonate (1.3 eq) was added and stirring continued for 20 hours. 1M HCl (5 mL/g) was added and the phases separated, the organic layer was washed twice with water and concentrated to a low volume. The crude compound (F3) was filtered through a pad of silica and then crystallised from methyl tert-butyl ether.
Wird geladen…