Method and novel intermediate products for producing isoxazolin-3-yl-acylbenzenenes
申请人:BASF Aktiengesellschaft
公开号:US06469176B1
公开(公告)日:2002-10-22
The present invention describes a process for preparing isoxazoles of the formula I
where:
R1 is hydrogen, C1-C6-alkyl,
R2 is hydrogen, C1-C6-alkyl,
R3, R4, R5 are each hydrogen, C1-C6-alkyl or R4 and R5 together from a bond,
R6 is a heterocysclic ring,
n is 0, 1 or 2;
which comprises preparing an intermediate of the formula VI
where R1, R3, R4 and R5 are each as defined above, followed by halogenation, thiomethylation, oxidation and acylation to give compounds of the formula I.
Furthermore, the invention describes novel intermediates for preparing the compounds of the formula I and novel processes for preparing the intermediates.
本发明描述了一种制备式I的异噁唑的方法,其中:R1是氢,C1-C6-烷基,R2是氢,C1-C6-烷基,R3、R4、R5分别是氢,C1-C6-烷基或R4和R5共同形成一个键,R6是一个杂环环,n为0、1或2;包括制备式VI的中间体,其中R1、R3、R4和R5分别如上定义,然后进行卤代反应、硫甲基化、氧化和酰化,以得到式I的化合物。此外,本发明还描述了制备式I化合物的新型中间体和制备中间体的新型方法。