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Letter
Research Support, Non-U.S. Gov't
Pyrazolidine-3,5-dione-based inhibitors of phosphoenolpyruvate carboxylase as a new class of potential C 4 plant herbicides.
FEBS Letters 2017 October
Phosphoenolpyruvate carboxylase (PEPC) is a key enzyme in the C4 photosynthetic pathway of many of the world's worst weeds and a valuable target to develop C4 plant-selective herbicides. By virtual screening, analog synthesis, and in vitro validation, we identified pyrazolidine-3,5-diones as a new class of small molecules with inhibitory potential down to the submicromolar range against C4 PEPC and a selectivity factor of up to 16 over C3 PEPC. No other biological activity has yet been reported for the best compound, (3-bromophenyl)-4-(3-hydroxybenzylidene)-pyrazolidine-3,5-dione. A systematic variation in the substituents allowed the derivation of a qualitative structure-activity relationship. These findings make this compound class highly interesting for further investigations toward generating potent, C4 plant-selective herbicides with a low potential for unwanted effects.
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