申请人:Ciba-Geigy Corporation
公开号:US04055572A1
公开(公告)日:1977-10-25
A process for the production of 3-hydroxy-1,2,4-triazole derivatives of formula I ##STR1## wherein R.sub.1 and R.sub.2 each represent a straight-chain or branched-chain alkyl group having 1 to 6 carbon atoms, or a cycloalkyl group having 3 to 6 carbon atoms, and X represents oxygen or sulphur, Which process comprises adding to a 1-alkyl-1-cyanohydrazine of formula II ##STR2## wherein R.sub.1 has the meaning given under formula I, a compound of formula III r.sub.2 -- xh (iii) wherein R.sub.2 and X have the meanings given under formula I; and subsequently cyclising the addition product by reaction with a compound of formula IV ##STR3## wherein R.sub.3 and R.sub.4 independently of one another represent chlorine or an alkoxy group having 1 to 4 carbon atoms. The 3-hydroxy-1,2,4-triazole derivatives are valuable intermediates for producing phosphoric acid esters which can be used as pesticidal agents, particularly as insecticides and nematicides.
一种制备式I的3-羟基-1,2,4-三唑衍生物的方法,其中R1和R2分别表示具有1到6个碳原子的直链或支链烷基或具有3到6个碳原子的环烷基,X表示氧或硫,该方法包括向式II的1-烷基-1-氰基腙中加入式III的化合物R2-XH(III),其中R2和X具有式I中所给出的含义;随后通过与式IV的化合物反应将加合物环化,其中R3和R4各自独立地表示氯或具有1到4个碳原子的烷氧基。3-羟基-1,2,4-三唑衍生物是制备磷酸酯的有价值中间体,可以用作杀虫剂和线虫杀剂等农药剂的原料。