Bioscience, Biotechnology, and Biochemistry 1996-09-01

Synthesis of 7-methoxyapigeninidin and its fungicidal activity against Gloeocercospora sorghi.

Y Aida, S Tamogami, O Kodama, T Tsukiboshi

Index: Biosci. Biotechnol. Biochem. 60(9) , 1495-6, (1996)

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Abstract

In the structure of sakuranetin, which was isolated as a phytoalexin from the rice plant, the methoxy group at C-7 has been shown to be important for its high activity. Apigeninidin was isolated as a phytoalexin from sorghum, but it had no methoxy group at C-7. We prepared 7-methoxyapigeninidin and compared its fungicidal activity with that of apigeninidin. The 7-methoxyapigeninidin showed higher activity against sorghum fungi than apigeninidin, suggesting that the methoxy group at C-7 was important for the high fungicidal activity.