申请人:——
公开号:US20030050477A1
公开(公告)日:2003-03-13
A process for preparing 7-(pyrazol-3-yl)benzoxazoles of the formula I
1
in which the variables R
1
-R
6
are as defined in claim
1
, which process is characterized in that a 2-halo-3-(pyrazol-3-yl)anilide of the formula II,
2
in which X is bromine or iodine is reacted with a base in the presence of a transition metal compound of subgroup VIIa, VIIIa or Ib of the Periodic Table of the Elements, is disclosed.
一种制备式I1的7-(吡唑-3-基)苯并噁唑的方法,其中变量R1-R6如权利要求1所定义,其特征在于,在存在元素周期表第VIIa、VIIIa或Ib族的过渡金属化合物的情况下,将式II的2-卤代-3-(吡唑-3-基)苯胺(其中X为溴或碘)与碱反应。