Synthesis and Herbicidal Activity of Novel Cyanoacrylate Derivatives Containing Substituted Oxazole Moiety

In search of novel cyanoacrylates with potent bioactivity, a series of new cyanoacrylate derivatives containing substituted oxazole moiety were designed and synthesized through the strategy of active substructure combination. They were structurally characterized by H-1 NMR, C-13 NMR and elemental analysis. Preliminary bioassay data showed that most title compounds possessed good herbicidal activity at the dosage of 1500 g/ha, 9 compounds exhibited herbicidal activity against Brassica juncea with 80%similar to 100%, 12 compounds had herbicidal activity against Chenopodium serotinum L. with 80%similar to 100%, two compounds both displayed 70% herbicidal activity against Alopecurus aequalis Sobol, and one compound showed 100%, 70%, and 60% herbicidal activity against Rumex acetosa L., Polypogon fugax Nees ex Steud and Poa acroleuca Steud, respectively. Additionally, the inhibitory rates of one compound against Brassica juncea and Rumex acetosa L. were both 30% at 37.5 g/ha.