Origin of Enantiomeric Selectivity in the Aryloxyphenoxypropionic Acid Class of Herbicidal Acetyl Coenzyme A Carboxylase (ACCase) Inhibitors
作者:James A. Turner、Daniel J. Pernich
DOI:10.1021/jf0116395
日期:2002.7.1
ACCase inhibition data suggest that the systems which contain a fused five-membered, but not a six-membered, ring present the necessary pharmacophore to the active site of ACCase, confirming the active conformation hypothesis and demonstrating that the precise placement of the carboxylate relative to the phenyl group is more critical than the placement of the methyl.
分子模型被用来为除草乙酰基CoA羧化酶(ACCase)抑制剂的芳氧基苯氧基丙酸系列的R-2-苯氧基丙酸部分提出“活性构象”。这种候选的活性构象是一种低能构象,其苯氧基片段远端的R-甲基由丙酸酯醚键周围的普遍异头作用稳定。由于S-甲基与苯基的o-氢之间的空间相互作用,无活性的S-对映异构体难以获得该构象。通过制备一系列新颖的刚性类似物来挑战这种候选构象。ACCase抑制数据表明,包含稠合五元环但不包含六元环的系统向ACCase的活性位点提供了必要的药效团,