Total synthesis of heliannuol B, an allelochemical from Helianthus annuus
A Roy, B Biswas, PK Sen, RV Venkateswaran
Index: Roy, Amalesh; Biswas, Bidyut; Sen, Prabir K.; Venkateswaran, Ramanathapuram V. Tetrahedron Letters, 2007 , vol. 48, # 39 p. 6933 - 6936
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Citation Number: 18
Abstract
Heliannuol B 1, consisting of a unique benzoxepane ring system belongs to a novel group of allelopathic sesquiterpenes isolated from the cultivar sunflowers Helianthus annus. 1 The other primary constituents are heliannuols A and C–E 2–5 and these have been implicated in the powerful allelopathic activity displayed by sunflowers. 2 Subsequently, other oxidized variants of some of these primary compounds have also been isolated from these flowers. 3 The structure ...
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