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Synthesis of spiroketal enol ethers related to tonghaosu and their insecticidal activities

✍ Scribed by Li Chen; Han-Hong Xu; Tai-Shan Hu; Yu-Lin Wu

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
112 KB
Volume
61
Category
Article
ISSN
1526-498X

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✦ Synopsis

Abstract

This paper describes the syntheses and biological activities of a number of spiroketal enol ethers which are analogues of the plant extract tonghaosu. The insecticidal potential of this spiroketal system is assessed. Copyright Β© 2005 Society of Chemical Industry

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Tonghaosu 1, a natural product discovered from several plants of tribe Athemdeae, is a [4.4]spiroketal with an enediyne side-chain and shows interesting insect antifeeding activity. In this paper a general and convenient synthetic methodology for the synthesis of 1, 2 and its spiroketal-enol ether d