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1 October 2000 Photooxidation of Cedrelone, a Tetranortriterpenoid from Toona ciliata
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Abstract

Cedrelone, a tetranortriterpenoid on photolysis by UV light yields a true photooxidation product 3 [14 β,15β,22β,23β-diepoxy-6-hydroxy-1,5,20(22)-meliatriene-2,7,21-trione] whose structure is well established by NMR studies and confirmed by X-ray crystallography, along with product 4 [14 β,15β-epoxy-6,23-dihydroxy-1,5,20(22)-meliatriene-2,7,21-trione]. Addition of rose bengal increases the rate of photooxidation whereas DABCO decreases rate of photolysis proving the involvement of singlet oxygen in the photooxygenation. Both the photoproducts exhibited antifeedant activity.

Geetha Gopalakrishnan, N. D. Pradeep Singh, V. Kasinath, R. Malathi, and S. S. Rajan "Photooxidation of Cedrelone, a Tetranortriterpenoid from Toona ciliata," Photochemistry and Photobiology 72(4), 464-466, (1 October 2000). https://doi.org/10.1562/0031-8655(2000)072<0464:POCATF>2.0.CO;2
Received: 18 April 2000; Accepted: 1 July 2000; Published: 1 October 2000
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