The present invention relates to a process for the preparation of hydroxypyridine based compounds. The process comprises the step of: in water, reacting a pyridine based compound with the proviso that the second position on the nitrogen ring is unsubstituted and the fourth position in the nitrogen ring is not substituted with halogen, with elemental fluorine at a temperature of about -25.degree. to about +30.degree. C. for a time sufficient to form a 2-hydroxypyridine based compound. The resulting 2-hydroxypyridine or quinoline carboxylic acids and esters are useful as herbicide and pharmaceutical intermediates.
本发明涉及一种制备
羟基吡啶基化合物的方法。该方法包括以下步骤:在
水中,将一种
吡啶基化合物与元素
氟在温度约为-25度至+30度之间反应,其中氮环上的第二位置未取代,氮环中的第四位置未用卤素取代,反应时间足以形成一种2-
羟基吡啶基化合物。所得的2-
羟基吡啶或
喹啉羧酸和酯可用作
除草剂和药物中间体。