申请人:Kertesz John Denis
公开号:US20080108810A1
公开(公告)日:2008-05-08
The present invention provides a process for the preparation 6-[3-(hetero)aryloxy-2-fluoro-benzyl]-2H-pyridazin-3-one compounds 1 where R2 is an optionally substituted aryl or an optionally substituted heteroaryl, R
6
is NO
2
, NH
2
, alkyl, halogen, or a function group readily derived therefrom and R
4c
is
hydrogen or alkyl. There also is provided a process for the preparation of phenylacetic acid compounds 2, wherein R
2
and R
6
are as defined previously and R
5a
is hydrogen or alkyl, which are useful for the preparation of pyridazinone compounds.
本发明提供了一种制备6-[3-(杂)芳氧基-2-氟苯基]-2H-吡啶并[3,2-c][1,2,4]三唑-3-酮化合物1的方法,其中R2是可选取代的芳基或可选取代的杂环基,R6是NO2、NH2、烷基、卤素或可由其轻松衍生的官能团,R4是氢或烷基。本发明还提供了一种制备苯乙酸化合物2的方法,其中R2和R6如前所定义,R5是氢或烷基,这些化合物对于制备吡啶并酮化合物是有用的。