1,1-Dibromoethane → HCID 69031119, compound
Reaction equation
C(=O)([O-])[O-].[K+].[K+].[CH2:7]([O:14][C:15]1[CH:16]=[C:17]([CH:30]=[C:31]([O:33][CH2:34][C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)[CH:32]=1)[C:18]1[O:19][C:20]2[C:25]([C:26](=[O:28])[CH:27]=1)=[CH:24][CH:23]=[C:22]([OH:29])[CH:21]=2)[C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1.[Br:41][CH:42](Br)[CH3:43]>CN(C)C=O>[Br:41][CH2:42][CH2:43][O:29][C:22]1[CH:21]=[C:20]2[C:25]([C:26](=[O:28])[CH:27]=[C:18]([C:17]3[CH:16]=[C:15]([O:14][CH2:7][C:8]4[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=4)[CH:32]=[C:31]([O:33][CH2:34][C:35]4[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=4)[CH:30]=3)[O:19]2)=[CH:24][CH:23]=1Participants
5
Reactant 3
Product 1
Reagents, catalysts & solvents 1
Procedure
Potassium carbonate (2.76 g, 20 mmol) was added to a stirred solution of 3′,5′-dibenzyloxy-7-hydroxy-flavone, 22 (2.25 g, 5 mmol) in dry dimethyl formamide (120 mL). After the mixture was stirred for 30 min, dibromo ethane (5 mL, 58 mmol) was added and the resultant was stirred at room temperature for 12 h. Reaction mixture was filtered through celite, concentrated under reduced pressure and extracted with chloroform. The extract was washed with water, dried over sodium sulphate, filtered and concentrated in vacuo. The residue was purified by column chromatography to afford 56.