Growing concern about the side effects of herbicides on non-target organisms and natural resources has promoted the use of stereo-chemically pure or enantiomerically-enriched compounds. The enantioselectivity in phytotoxicity and environmental effects of herbicides has recently been the focus of much research and is becoming better understood. Because of their different biological properties that selectively interact with biological systems, enantiomers of chiral herbicides can be regarded as different substances. It is necessary to study toxicities, metabolic conversions and migration issues at the chiral level to predict the exact herbicidal effects and pollution load. Here, we summarize the preparation technology of optically pure enantiomers and their enantioselective effects on plants and the biotransformation effects of the main chiral herbicides. The review provides a basis for further study of the chemical and biological behaviors of chiral herbicides. We also address research in the manufacture of optically pure or enantiomerically enriched herbicides with higher efficiency and fewer side effects.

Phytotoxicity and environmental fate of chiral herbicides

239th National Meeting (2010)

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