GABA receptor antagonists and insecticides: common structural features of 4-alkyl-1-phenylpyrazoles and 4-alkyl-1-phenyltrioxabicyclooctanes
作者:Robert E Sammelson、Pierluigi Caboni、Kathleen A Durkin、John E Casida
DOI:10.1016/j.bmc.2004.03.069
日期:2004.6
the pyrazole trifluoromethylsulfinyl moiety with tert-butyl or isopropyl and the phenyl trifluoromethyl substituent with ethynyl, trifluoromethoxy, bromo or chloro. Among the compounds studied, those with other alkyl groups at the 4-position of the pyrazole, as well as phenyl substitution without one or both of the 2,6-dichloro groups, are less effective. 5-Amino-4-tert-butyl-3-cyano-1-(2,6-dichloro-
氟虫腈[5-氨基-3-氰基-1-(2,6-二氯-4-三氟甲基苯基)-4-三氟甲基亚砜基吡唑]是最重要的杀虫剂之一。此处描述的结构活性研究表明,氟虫腈在人β3和家蝇γ-氨基丁酸(GABA)受体上保留了很高的结合力,对家蝇的毒性是用叔丁基或异丙基和苯基取代吡唑三氟甲基亚磺酰基部分带有乙炔基,三氟甲氧基,溴或氯的三氟甲基取代基。在所研究的化合物中,在吡唑的4-位带有其他烷基的化合物以及没有2,6-二氯基团中的一个或两个都被苯基取代的化合物效果较差。5-氨基-4-叔丁基-3-氰基-1-(2,6-二氯-4-乙炔基苯基)吡唑与4-叔丁基-3-氰基-1-(4-乙炔基苯基)-2,6,7-三恶双环[2.2.2]辛烷(最有效)几乎等构。有效的4-烷基-1-苯基三氧杂双环辛烷)作为非竞争性GABA拮抗剂和杀虫剂。这些发现被解释为GABA受体中的三个结合亚位点:与叔丁基或等效基团发生空间相互作用的疏水位点;吡唑N-2的氢键位;苯基部分表面的pi键位;