Acetic Anhydride → HCID 54422259, compound
Reaction equation
[OH:1][C:2]1[CH:11]=[C:10]2[C:5]([C:6](=[O:20])[C:7]([C:12]3[CH:17]=[CH:16][CH:15]=[C:14]([O:18][CH3:19])[CH:13]=3)=[CH:8][O:9]2)=[CH:4][CH:3]=1.[C:21](OC(=O)C)(=[O:23])[CH3:22]>N1C=CC=CC=1>[C:21]([O:1][C:2]1[CH:11]=[C:10]2[C:5]([C:6](=[O:20])[C:7]([C:12]3[CH:17]=[CH:16][CH:15]=[C:14]([O:18][CH3:19])[CH:13]=3)=[CH:8][O:9]2)=[CH:4][CH:3]=1)(=[O:23])[CH3:22]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
7-Acetoxy-3′-methoxyisoflavone was prepared from 7-hydroxy-3′-methoxyisoflavone (1.7 g, 6.3 mmol), acetic anhydride (6 ml) and pyridine (1.0 ml) as described for 4′,7-diacetoxydaidzein. Yield: (1.6 g, 81%) m.p. 118° C. 1H NMR (CDCl3): δ 2.36 (s, 3H, OCOCH3), 3.85 (s, 3H, OMe), 6.95 (dd, 1H, J 2.0 Hz 8.3 Hz, H6), 6.70-7.40 (m, 5H, ArH), 8.01 (s, 1H, H2), 8.32 (d, 1H, J 8.7 Hz, H5).