METHOD OF SYNTHESIZING 1,2,4-TRIAZOLE-3-THIONE COMPOUNDS AND INTERMEDIATES THEREOF
申请人:ORIENTAL (LUZHOU) AGROCHEMICALS CO., LTD.
公开号:US20190127338A1
公开(公告)日:2019-05-02
Disclosed is a method of synthesizing 1,2,4-triazole-3-thione compounds and intermediates thereof. The method includes reacting a hydrazine with glyoxylic acid to form a hydrazono acetic acid intermediate followed by reacting the latter with thiocyanate to obtain the 1,2,4-triazole-3-thione compound. The raw materials involved in the present method are readily available, and the reaction is very specific in terms of regioselectivity, resulting in minimum by-product and high product yield. There are neither specific requirements for special equipment nor special operations such as high vacuum, high temperature, anhydrous and oxygen-free manipulations. The process is simple and generates minimum wastes, suitable for industrial production.
本发明公开了一种合成1,2,4-三唑-3-硫醇化合物及其中间体的方法。该方法包括将肼与乙醛酸反应形成肼酮乙酸中间体,然后将后者与硫氰酸盐反应得到1,2,4-三唑-3-硫醇化合物。本方法所涉及的原材料易得,反应在区域选择性方面非常具体,产生的副产物很少且产率高。既无需特殊设备,也无需高真空、高温、无水和无氧操作等特殊要求。该过程简单,产生的废物很少,适合于工业生产。