化学性质
这是一种结晶化合物,熔点为162-165℃。
用途
它是心脉舒通(乙酯黄酮)的中间体。
生产方法
可通过以下步骤合成:首先,在氯化锌的参与下,间苯二酚与乙酸反应生成2,4-二羟基苯乙酮;接着,该产物再与苯甲酰氯反应得到2,4-二(苯甲酰氧基)苯乙酮;最后,在丙酮中用氢氧化钾处理进行分子重排(苯甲酰基转位),从而制得目标产品。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1-[2,4-双(苯甲酰氧基)苯基]乙酮 | 2,4-dibenzoyloxyacetophenone | 66832-97-1 | C22H16O5 | 360.366 |
Six flavonoid 7- O-β-D-glycosides 1a-3a and 1b–3b were synthesised from the flavones 7a and 7b by glycosidation and deacetylation with the corresponding α-acetylglycosyl bromides. 7a and 7b were prepared in high yield by an improved Baker-Venkataraman rearrangement using 2, 4-dihydroxyacetophenone as starting material and tetrabutylammonium bromide (TBAB) as a phase transfer catalyst. The glycosidation procedure was modified by using anhydrous K2CO3 in a solvent mixture of DMF/acetone (3:2v/v) and TBAB as a phase transfer catalyst.