申请人:Clariant International Ltd.
公开号:EP2031026A1
公开(公告)日:2009-03-04
The invention relates to a process for the preparation of compounds of the general formula (I)
where
X are halogen atoms,
the rings labeled A are linearly or angularly fused in position 1,2; 2,3 or 3,4, and in position 8,9; 9,10 or 10,11, to a 5- or 6-membered heterocyclic ring containing in the ring one nitrogen atom and one oxygen atom, or containing in the ring two nitrogen atoms,
comprising an oxidation of a 3,6-bisarylamino-2,5-dihalobenzoquinone of the formula (II)
in an aprotic-polar organic solvent in the presence of an organic sulfonic acid.
该发明涉及一种制备通式(I)化合物的方法,其中X为卤原子,标记为A的环在位置1,2;2,3或3,4处线性或角度融合,并在位置8,9;9,10或10,11处,连接到一个含有一个氮原子和一个氧原子的5-或6-成员杂环环,或者在环中含有两个氮原子,包括在无水极性有机溶剂中,在有机磺酸存在下对通式(II)的3,6-双芳胺基-2,5-二卤苯醌进行氧化的步骤。