Fluorine, heterocycle, and chirality are the three major characteristics of new drugs in the field of modern pesticides and medicine. In recent years, new types of fluorine-containing pyridine pesticides, such as acetamiron, pyridoxuron, gazolone, and fluazinam, have the advantages of broad-spectrum systemic absorption, high efficiency, low toxicity, and low pollution, and have become high-efficiency insecticides, The backbone of herbicides and chemicalbook fungicides. Fluorine, heterocycle, and chirality are the three major characteristics of new drugs in the field of modern pesticides and medicine. 2,3-Dichloro-5-trifluoromethylpyridine (2,3,5-DCTF) is a key intermediate in the production of these new pesticides and has become a hot spot in the industry.