Microwave- and ultrasound-assisted oxidation of bio-active limonoids
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- 作者：Gopalakrishnan ; Geetha ; Pradeep Singh ; N. D. ; Kasinath ; V. ; Siva Rama Krishnan ; M. ; Malathi ; R. ; et. al.
- 关键词：tetranortriterpenoids ; N-bromosuccinimide ; antifeedancy ; ultrasound ; microwave ; α ; β ; -unsaturated lactone
- 刊名：Tetrahedron Letters
- 出版年：2001
- 出版时间：September 10, 2001
- 年：2001
- 卷：42
- 期：37
- 页码：6577-6579
- 全文大小：90.7 K
文摘
Tetranortriterpenoids from Azadirachta indica A. Juss and Soymida febrifuga (Meliaceae), have been selectively oxidized to single major products which exhibit bioactivity higher than the parent compounds, comparable to that of azadirachtin A. The reaction proceeds to completion in less than 15 min and 1 min on being assisted by ultrasound and microwave irradiation, respectively.