发明授权
- 专利标题： Preparation of quinophthalone derivatives
- 专利标题（中）： 喹酞酮衍生物的制备
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申请号： US835986申请日： 1992-02-27
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公开(公告)号： US5342950A公开(公告)日： 1994-08-30
- 发明人: Gerhard Kilpper , Helmut Hoch
- 申请人： Gerhard Kilpper , Helmut Hoch
- 申请人地址： DEX Ludwigshafen
- 专利权人： BASF Aktiengesellschaft
- 当前专利权人： BASF Aktiengesellschaft
- 当前专利权人地址： DEX Ludwigshafen
- 优先权： DEX3940348 19891206
- 主分类号： C07D215/12
- IPC分类号： C07D215/12 ; C09B25/00 ; C07D215/06
摘要：
Quinophthalone derivatives of the formula I ##STR1## where the group A completes substituted or unsubstituted heteroaromatic rings and the group B completes a substituted or unsubstituted aromatic ring, are prepared by reacting a methyl-substituted heterocyclic compound of the formula II ##STR2## with an anhydride of an aromatic dicarboxylic acid of the formula III ##STR3## or the corresponding free dicarboxylic acid (IIIa) in the presence of an acid and of an organic solvent, the organic solvent used being an alkyl benzoate.
公开/授权文献
- US4143143A Substituted imidazo[5,1-a]isoquinolines 公开/授权日：1979-03-06
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