申请人:——
公开号:US20030045735A1
公开(公告)日:2003-03-06
The present invention relates to a process for preparing 1-amino-4-hydroxyanthraquinones of the formula (I)
1
wherein R is an aliphatic or aromatic radical,
by reacting 1,4-dihydroxyanthraquinone, optionally as a mixture with 2,3-dihydro-1,4-dihydroxyanthraquinone, with aliphatic or aromatic amines in the presence of N-methyl-2-pyrrolidone.
本发明涉及一种制备式(I)的1-氨基-4-羟基蒽醌的方法,其中R是脂肪族或芳香族基团,通过在N-甲基-2-吡咯烷酮存在下,将1,4-二羟基蒽醌与脂肪族或芳香族胺反应制备而成,可选地,还可与2,3-二羟基-1,4-二氢蒽醌混合使用。