Synthesis of coumarins by Pechmann reaction under microwave irradiation and green solvent ionic liquid
- Received Date: 2009-05-05
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Key words:
- coumarin derivatives /
- microwave irradiation /
- ionic liquid /
- Pechmann reaction
Abstract: Objective :To explore an easily-controled,environmentally-benign synthetic method of coumarin derivatives. Methods :Several coumarin derivatives are synthesized from phenols and ethyl acetoacetates by the Pechmann reaction under four different conditions(H2SO4,BiCl3,Microwave/BiCl3,Microwave/ionic liquid). Results :Compared with traditional reaction,present method under microwave and ionic liquid avoids using of organic solvent,shorten the reaction period and obtain a good yield. Conclusion :Microwave accelerated Pechmann reaction using ionic liquid as catalyst is a convenient and green alternative for synthesizing coumarin derivatives.
Citation: | ZHU Zhan-zhou, DOU Jia-tai, XU Wei-heng, JI Da-wei, WANG Xiao-yan, HE Bang-ping, SUN Qing-yan. Synthesis of coumarins by Pechmann reaction under microwave irradiation and green solvent ionic liquid[J]. Journal of Pharmaceutical Practice and Service, 2009, 27(6): 448-450. |