申请人:Bayer Aktiengesellschaft
公开号:US04429135A1
公开(公告)日:1984-01-31
A process for the production of 1,2,4-triazolidine-3,5-diones corresponding to the general formula I ##STR1## in which R.sup.1 represents a monofunctional, optionally substituted hydrocarbon radical, optionally interrupted by hetero atoms or hetero atomic groups, characterized in that hydrazodicarbonamide or 1,2,4-triazolidine-3,5-dione is reacted with a primary amine corresponding to the general formula II R.sup.1 NH.sub.2 (II) or a monofunctional hydrazodiacarbonamide corresponding to the formula III H.sub.2 --N--CO--NH--NH--CO--NH--R.sup.1 (III) in which R.sup.1 is as defined for formula I, at a temperature in the range from 150.degree. to 280.degree. C., under pressure of from 50 mbars to 5 bars, the reaction being accompanied by the elimination of ammonia.
生产1,2,4-三唑烷-3,5-二酮的方法对应于一般式I ##STR1## 其中R.sup.1代表一种单官能团,可选择地被杂原子或杂原子基替代,其特征在于将双腙二甲酰胺或1,2,4-三唑烷-3,5-二酮与与一般式II R.sup.1 NH.sub.2 (II)相对应的一种初级胺或与一般式III H.sub.2 --N--CO--NH--NH--CO--NH--R.sup.1 (III)相对应的一种单官能腙二甲酰胺,在温度范围为150°C至280°C,压力为50毫巴至5巴的条件下反应,反应伴随着氨的消除。