The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Comparative molecular field analysis (CoMFA) and holographic quantitative structure-activity relationship (HQSAR) on the growth inhibition activity of the herbicidal 3-phenyl-5-(3,7-dichloro-8-quinolinyl)-1,2,4-oxadiazole derivatives

제초성 3-Phenyl-5-(3,7-dichloro-8-quinolinyl)-1,2,4-oxadiazole 유도체들의 생장 저해활성에 관한 비교 분자장 분석 (CoMFA)과 분자 홀로그램 구조-활성관계 (HQSAR)

  • Sung, Nack-Do (Division of Applied Biology & Chemistry, College of Agricultural & Life Sciences, Research Center for Transgenic Cloned Pigs, Chung-nam National University) ;
  • Lee, Sang-Ho (Korea Research Institute of Chemical Technology) ;
  • Song, Jong-Hwan (Korea Research Institute of Chemical Technology) ;
  • Kim, Hyoung-Rae (Korea Research Institute of Chemical Technology)
  • 성낙도 (충남대학교 농업생명과학대학 응용생물화학부) ;
  • 이상호 (한국화학연구원 생물의학연구부) ;
  • 송종환 (한국화학연구원 생물의학연구부) ;
  • 김형래 (한국화학연구원 생물의학연구부)
  • Published : 2003.06.30
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Abstract

A series of new quinclorac family, herbicidal 3-phenyl-5-(3,7-dichloro-8-quinolinyl)-1,2,4-oxadiazole derivatives as substrate were synthesized and their growth inhibition activity $(pI_{50})$ against root and shoot of rice plant (Oryza sativa L.) and barnyard grass (Echinochloa crus-galli) were determined. And then comparative molecular field analysis (CoMFA) and molecular holographic quantitative structure- activity relationship (HQSAR) were compared in terms of their potential for predictiability. The statistical results were suggested that HQSAR based model had better predictability than CoMFA model. The selective factors to remove barnyard grass take electron withdrawing groups which can be created positive charge and steric bulky on the phenyl ring. Results revealed that the unknown 2,6-dichloro-substituent, U5 and 2,4,6-trichloro-substituent, U6(${\Delta}pI_{50}$=CoMFA: 1.18 & HQSAR: 1.82) were predicted as compound with higher activity and selectivity.

새로운 quinclorac계 제초성 화합물을 탐색하기 위하여 기질 화합물로 3-phenyl-5-(3,7-dichloro-8-quinolinyl)-1,2,4-oxadiazole 유도체들의 벼 (Ory)와 논피(Ech) 줄기 및 뿌리에 대한 생장 저해활성에 관한 비교 분자장 분석 (CoMFA)과 분자 홀로그램 구조-활성관계 (HQSAR) 를 분석하였다. 두 초종의 부위 별 생장 저해 활성에 대한 PLS 계산에 따른 교차 확인된 예측성$(q^2)$과 Pearson 상관계수$(r^2)$를 비교한 바, HQSAR 모델이 CoMFA 모델보다 양호한 결과를 나타내었다. 논피에 대한 선택성 조건은 입체적으로 큰 치환기로서 phenyl 고리상에 양하전을 생성하는 전자 끌게가 도입되어야 할 것으로 판단되었으며 2,6-dichloro, U5 및 2,4,6-trichloro-치환제, U6(${\Delta}pI_{50}$=CoMFA: 1.18 및 HQSAR: 1.82) 등은 두 초종에 대하여 선택성과 고활성이 예측되는 화합물이었다.

Keywords

References

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