Microwave- and ultrasound-assisted oxidation of bio-active limonoids
摘要:
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 I min on being assisted by ultrasound and microwave irradiation, respectively. (C) 2001 Elsevier Science Ltd. All rights reserved.