申请人:BASF Aktiengesellschaft
公开号:US04153607A1
公开(公告)日:1979-05-08
4,5-Disubstituted thiazoles are manufactured by reacting 4-amino-5-cyano-thiazoles with hydrogen sulfide in the presence of basic compounds, followed by dehydrogenating cyclization. The new 3-amino-thiazolo-(4,5-c)-isothiazoles I, 4-amino-5-thiocarbamidothiazoles III and 4,5-disubstituted thiazoles IV obtainable by the process of the invention are valuable intermediates for the manufacture of azo dyes and of crop protection agents.
4,5-二取代噻唑是通过在碱性化合物存在下,将4-氨基-5-氰基噻唑与氢硫化物反应,然后进行脱氢环化制造的。本发明的新型3-氨基噻唑并[4,5-c]异噻唑酮I,4-氨基-5-硫代氨基噻唑III和4,5-二取代噻唑IV是制造偶氮染料和作物保护剂的有价值的中间体。