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Citation: HU Li-Hong, QIN Zhang-Lan, LI Chao, HUANG Qin, WANG Fen-Hua. Synthesis and Fungicidal Activity of Flavanone Derivatives Containing Isopentene Group[J]. Chinese Journal of Applied Chemistry, ;2003, 20(12): 1161-1165. shu

Synthesis and Fungicidal Activity of Flavanone Derivatives Containing Isopentene Group

1.
Department of Chemistry, Central China Normal University, Wuhan 430079

Corresponding author: HU Li-Hong,
Received Date: 28 December 2002
Available Online: 15 July 2003
Fund Project: 湖北省自然科学基金资助项目(99J059) (99J059)

Twelve isopentenylflavanone derivatives such as 3',5'-diisopentenyl-4'-hydroxy-2-phenyl-4H-1-benzopyran-4-one were synthesized by the reaction of isopentenylcinnamic acid with substituted phenols in the yield 69%~30%. The structures of title compounds(Ⅲa~Ⅲl) were confirmed by elemental analysis, IR, ¹H NMR and MS. The physical, chemical and spectroscopic properties of these compounds were investigated. The reaction method and reaction condition had been compared and analysized. It was found that the new reaction was precede the classical. It was found from biological test that some of these compounds had good fungicidal activity. Especially inhibition rate of compound Ⅲd to Anthracnosis cucumaria and Rhizotonia Solani Kuhn. And that of compound Ⅲb, Ⅲc, Ⅲf to Piricularia oryzae Cav arrive at 100%. Most compounds showed fungicidal activity close to 90%. It provides that isopentenyl substituentes might evidently enhance fungicidal activity of this kind of the compounds.
- isoprenyl bromide,
- flavanone,
- synthesis,
- fungicidal activity
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