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Comparative Molecular Similar Indice Analysis on Fungicidal Activity of N-phenyl-O-phenylthionocarbamate Derivatives against Rice Sheath Blight and Phytophthora Blight  

Soung, Min-Gyu (Division of Applied Biology and Chemistry, College of Agriculture and Life Science, Chungnam National University)
Yoo, Jae-Won (Hanbul Cosmetics Co. Ltd., R & D Center)
Jang, Seok-Chan (Division of Applied Biology and Chemistry, College of Agriculture and Life Science, Chungnam National University)
Sung, Nack-Do (Division of Applied Biology and Chemistry, College of Agriculture and Life Science, Chungnam National University)
Publication Information
Applied Biological Chemistry / v.50, no.3, 2007 , pp. 187-191 More about this Journal
Abstract
Comparative molecular similarity indice analysis (CoMSIA) models on the fungicidal activities of N-phenyl substituents (X) in N-phenyl-O-phenylthionocarbamate derivatives against rice sheath blight (Rhizoctonia solani: RS) and phytophthora blight (Phytophthora capsici: PC) were derived. Also, the characterizations of H-bonds between substrates and ${\beta}-tubulin$ were discussed quantitatively. It was revealed that, from the contour maps of CoMSIA models, the H-bond acceptor field contributed the most highly to fungicidal activity for two fungi in common. It is predicted that the selectivity in the fungicidal activity between two fungi is caused by results from the roles of H-bond donor disfavor functional groups in RS and H-bond acceptor disfavor functional groups in PC when these two groups induced at meta- and para-position on the N-phenyl ring. And also, if the substituents (X) are steric disfavor group, negative charge favor groups are introduced at the metaposition in RS and H-bond acceptor group is introduced at the para-position in PC, the antifungal activity against two fungi will be likely able to be increased.
Keywords
CoMSIA models; fungicidal activity; N-phenyl-O-phenylthionocarbamates; Phytophthora capsici (PC); Rhizoctonia solani (RS);
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