中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
3,3'-(4-甲基亚苄基)-双(4-羟基香豆素) | 3,3'-(4-methylbenzylidene)-bis(4-hydroxycoumarin) | 23748-50-7 | C26H18O6 | 426.425 |
An efficient solvent-free procedure for the preparation of 4,4′-epoxydicoumarins via the ondensation of 4-hydroxycoumarin with aldehydes in the presence of catalytic amount of phosphorus pentoxide/silica gel at 110°C is described. The advantages of this method are generality, high yields, short reaction times, ease of product isolation, low cost and ecologically friendly.