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Advances on Synthesis and Biological Activities of Mesoionic Compounds

As an important kind of heterocyclic molecules, mesoionic compounds are widely used in medicine, pesticide and other fields. Ever since they were discovered in 1935, mesoionic compounds have been extensively explored in terms of synthesis, properties and applications. Many references relating to these compounds have been published over years revealing their unique reactivity and bioactivity. An overview of mesoionic compounds from the perspectives of synthetic methods, reaction mechanisms and applications is offered. Their potentials as a dominant active structure for development of pesticides are also discussed.