申请人:Oriental (Luzhou) Agrochemicals. Co., Ltd.
公开号:EP3486235A1
公开(公告)日:2019-05-22
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-硫酮化合物及其中间体的方法。该方法包括使肼与乙醛酸反应生成肼基乙酸中间体,然后使后者与硫氰酸盐反应得到 1,2,4-三唑-3-硫酮化合物。本方法所涉及的原材料都很容易获得,而且反应的区域选择性很强,副产物最少,产品收率高。既不需要特殊的设备,也不需要特殊的操作,如高真空、高温、无水和无氧操作。该工艺简单,产生的废物最少,适合工业化生产。