申请人:Petrolite Corporation
公开号:US04555576A1
公开(公告)日:1985-11-26
2,5-dihydrothiazoles are prepared by reacting aza-alkylene-dienes with sulfur at relatively low temperatures for example below about 160.degree. C. Where the reaction is carried out at relatively higher temperature, for example above about 160.degree. C., such as 160.degree. to 250.degree. C., 4,5-dihydrothiazoles are formed. In addition 2,5-dihydrothiazoles can be converted to 4,5-dihydrothiazoles by heating them to temperatures above about 160.degree. C.
2,5-二氢噻唑是通过在相对较低的温度下(例如在约160摄氏度以下)将氮杂-烯丙烯与硫反应制备的。当反应在相对较高的温度下进行,例如在约160摄氏度以上,如160摄氏度至250摄氏度之间,会形成4,5-二氢噻唑。此外,2,5-二氢噻唑可以通过加热至约160摄氏度以上的温度将其转化为4,5-二氢噻唑。