申请人:ROHM AND HAAS COMPANY
公开号:EP0872473A2
公开(公告)日:1998-10-21
The present invention relates to a process for preparing 5-methylene cyclic carbamates either by cyclization of an alkynyl amine with carbon dioxide in the presence of a copper catalyst or by forming an isocyanate from a substituted acetoacetamide followed by hydrolysis. The 5-methylene cyclic carbamates by either method are converted to 5-(chloromethylene) cyclic carbamates, using trichloroisocyanuric acid, followed by hydrolysis to a chloroketoamine.
The chloroketoamine from the process of this invention additionally can be reacted with an organic acid chloride to form an amide compound which is useful as a fungicide.
本发明涉及一种制备 5-亚甲基环氨基甲酸酯的工艺,其方法是在铜催化剂存在下,使炔基胺与 二氧化碳发生环化反应,或者由取代的乙酰乙酰胺生成异氰酸酯,然后进行水解。用这两种方法制得的 5-亚甲基环氨基甲酸酯都可以用三氯异氰尿酸转化为 5-(氯亚甲基)环氨基甲酸酯,然后水解为氯酮胺。
此外,本发明工艺中产生的氯酮胺还可与有机酸氯化物反应,生成一种可用作杀真菌剂的酰胺化合物。