Microwave-assisted claisen rearrangement. Application to the synthesis of angelicin derivatives
作者:Hassan Valizadeh、Abbas Shockravi
DOI:10.1002/jhet.5570430336
日期:2006.5
acetoxy and methoxy)-methyl-4,5′-dimethylangelicins were efficiently and rapidly synthesized via Claisen rearrangement of 4-methyl-7-[4-(hydroxy, chloro, amino, acetoxy and methoxy)-but-2-ynyloxy]-coumarins respectively under microwave irradiation. Prominent among the advantages of this new method are operational simplicity, good yields in short reaction times and easy work-up procedures employed.
通过4-甲基-7- [4-(羟基,氯,氨基,乙酰氧基和羟基)的克莱森重排,有效并快速地合成了4'-(羟基,氯,氨基,乙酰氧基和甲氧基)-甲基-4,5'-二甲基Angelicins。微波辐射下分别有甲氧基)-丁-2-炔氧基]-香豆素。这种新方法的优点包括操作简便,反应时间短,收率高以及易于使用的后处理程序。