申请人:FMC Corporation
公开号:US05440045A1
公开(公告)日:1995-08-08
A process for the production of an aryl triazolinones of the formula ##STR1## wherein R is lower alkyl and: X.sub.n is 2,4-dichloro-5-methylsulfonylamino; 2-chloro-5-methylsulfonylamino; 4-chloro-5-methylsulfonylamino; 3-methylsulfonylamino; 4-chloro; 2-chloro; 3-nitro; 4-chloro-3-nitro; 2-chloro-5-nitro; 2,4-dichloro-5-nitro; 2-fluoro; 2-4-chloro; 2,4-dichloro; 4-alkoxy; or 4-alkoxy-2-fluoro; which comprises treating, in a tert-butanol medium, an aryl hydrazine of the formula ##STR2## sequentially with (i) a C.sub.1 -C.sub.3 aldehyde, (ii) a cyanate and weak organic acid, and (iii) a hypohalous acid, a salt thereof, or a halogen.
一种制备式为##STR1##的芳基三唑酮的方法,其中R是较低的烷基,X.sub.n是2,4-二氯-5-甲基磺酰氨基、2-氯-5-甲基磺酰氨基、4-氯-5-甲基磺酰氨基、3-甲基磺酰氨基、4-氯、2-氯、3-硝基、4-氯-3-硝基、2-氯-5-硝基、2,4-二氯-5-硝基、2-氟、2-4-氯、2,4-二氯、4-烷氧基或4-烷氧基-2-氟的方法,包括在叔丁醇介质中,依次用式为##STR2##的芳基肼分别处理:(i) C.sub.1 -C.sub.3 醛、(ii) 氰酸酯和弱有机酸,以及(iii) 次次亚氯酸、其盐或卤素。