异噁唑类除草剂合成研究进展

Progress in the synthesis of isoxazole herbicides

异噁唑类除草剂具有高选择性、高活性、持效期长等优点,同时具有更好的生态安全性,近年来受到广泛关注。但是该类原料药的合成路线长,存在收率低,成本高等问题,限制了规模应用。综述了异噁唑类除草剂的研究进展,重点对砜吡草唑(Pyroxasulfone)、苯磺噁唑草(Fenoxasulfone)、苯唑草酮(Topramezone)、异噁唑啉除草剂(Methiozolin)、双苯噁唑酸乙酯(Ethyl bisoxazolate)5类新兴的异噁唑类除草剂的应用范围和合成路线进行了分析,比较了优缺点,为开发此类除草剂农药提供指导。

Isoxazole herbicides have attracted wide attention in recent years due to their high selectivity,high activity,long duration of efficacy and better ecological safety.However,the long synthetic route,low yield and thus high cost limit the scale application of this kind of agricultural chemicals.This paper reviews the progress in isoxazole type herbicides,focusing on the application scope and synthesis route of four new isoxazole herbicides,namely pyroxazolone,fenoxazolone,topramezone,methiozolin and ethyl bisoxazolate.The advantages and disadvantages of different synthetic strategies are compared to provide a guidance for the development of isoxazole type herbicides.