[C:1](Cl)(=[O:5])[CH2:2][CH2:3][CH3:4].[OH:7][C@@H:8]1[C:25]2[C:24]3[N:23]([CH3:26])[C:22]4[N:21]=[C:20]5[CH:27]=[CH:28][CH:29]=[CH:30][C:19]5=[CH:18][C:17]=4[C:16](=[O:31])[C:15]=3[C:14]([O:32][CH3:33])=[CH:13][C:12]=2[O:11][C:10]([CH3:35])([CH3:34])[C@@H:9]1[OH:36]>N1C=CC=CC=1.CN(C)C1C=CN=CC=1>[C:1]([O:36][C@@H:9]1[C@H:8]([OH:7])[C:25]2[C:24]3[N:23]([CH3:26])[C:22]4[N:21]=[C:20]5[CH:27]=[CH:28][CH:29]=[CH:30][C:19]5=[CH:18][C:17]=4[C:16](=[O:31])[C:15]=3[C:14]([O:32][CH3:33])=[CH:13][C:12]=2[O:11][C:10]1([CH3:34])[CH3:35])(=[O:5])[CH2:2][CH2:3][CH3:4]Add 2 equivalents of butyryl chloride to a solution of 0.74 mmol of the compound of Example 3 in 7 ml of anhydrous pyridine in the presence of 4-dimethylaminopyridine. Stir at ambient temperature for 72 hours and then add 5 equivalents of butyryl chloride and stir again for 72 hours and then evaporate to dryness. Chromatography on silica gel allows the expected product to be isolated.
Wird geladen…