中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4H-1-苯并吡喃-4-酮,2-(2,4-二羟基苯基)- | 2’,4’-dihydroxyflavone | 170310-00-6 | C15H10O4 | 254.242 |
7-羟基-2-(2-羟基苯基)-4H-苯并吡喃-4-酮 | 7,2'-dihydroxyflavone | 77298-66-9 | C15H10O4 | 254.242 |
Ammonium iodide in open air decomposes to ammonia and iodine. The in situ generated iodine has been used for cyclization of 2?-hydroxychalcones to corresponding flavones under solvent free conditions with good to excellent yields. This method would serve as an attractive alternative to the existing methods for synthesis of flavones and use of toxic molecular iodine is avoided.
A variety of flavones were expediently synthesized from readily accessible chromanones