Heterocyclic compound |
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| 申请号 | JP23886691 | 申请日 | 1991-08-27 | 公开(公告)号 | JPH04257566A | 公开(公告)日 | 1992-09-11 |
| 申请人 | Bayer Ag; | 发明人 | KURISUCHINA DEIBURITSUTSU; HANSU HEHISHIYUTETSUTAA; | ||||
| 摘要 | PURPOSE: To provide a heterocyclic compd. useful as a coloring agent for coloring high-polymer org. materials and more particularly plastics by pigments and dyes, and the intermediate thereof. CONSTITUTION: The compd. of formula I (R 1 , R 2 are alkyl, cycloalkyl, aralkyl, aryl, heterocyclic group; R 1 , R 4 are H, alkyl, aryl, cycloalkyl, aralkyl, heterocyclic group) or the compd. of formula II (X', Y' are O, S, NR 5 , part of 5- or 6-membered heterocycle; R 5 is H, alkyl, aryl, etc.). The compd. of the formula I is obtd. by bringing the compd. of formula III (R 12 is H, COR 5 ) and the compd. of the formula R 1 -COCOOR 3 into reaction at 30 to 130°C in the presence of a base (e.g.; triethylamine). The compd. of the formula II is obtd. by heating the compd. of the formula I in a melt or a solvent of a high b. p. COPYRIGHT: (C)1992,JPO |
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