ChemInform Abstract: Demethylation—Sulfo
✍
Amar Habsaoui; Jose Luis Franquet Cami; Emile M. Gaydou; Jean-Claude Wallet
📂
Article
📅
2010
🏛
John Wiley and Sons
⚖ 32 KB
Demethylation-Sulfonation of 2',3',4'-Trimethoxyflavones. -Treatment of flavones (I) in conc. H 2 SO 4 results in total demethylation and sulfonation at the 5'-position of the phenyl ring, whereas the 5-hydroxy derivative (III) is demethylated and disulfonated at the 8-and 5'-position. Based on the