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首页> 外文期刊>Chemistry of heterocyclic compounds >The p -(dimethylamino)benzaldehyde modification of Hantzsch reaction: Synthesis of 6-(1H-benzimidazol-2-yl)pyrido[2,3- d ]pyrimidino-2,4(1H, 3H)-diones
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The p -(dimethylamino)benzaldehyde modification of Hantzsch reaction: Synthesis of 6-(1H-benzimidazol-2-yl)pyrido[2,3- d ]pyrimidino-2,4(1H, 3H)-diones

机译:Hantzsch反应的对-(二甲基氨基)苯甲醛修饰:合成6-(1H-苯并咪唑-2-基)吡啶并[2,3-d]嘧啶-2,4(1H,3H)-二酮

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摘要

The reaction between p-(dimethylamino)benzaldehyde and 2-acylmethyl-1H-benzimidazoles and 6-amino-1,3-dimethylpyrimidino-2,4(1H,3H)-dione has given previously unknown 5-unsubstituted 6-(1H-benzimidazol-2-yl)pyrido[2,3-d]pyrimidino-2,4(1H,3H)-diones. The reaction occurs on boiling in acetic and acid and includes the formation of 1,4-dihydropyridine-bearing compounds in accordance with the Hantzsch reaction scheme and aromatization as a result of cleavage of N,N-dimethylaniline.
机译:对-(二甲基氨基)苯甲醛与2-酰基甲基-1H-苯并咪唑和6-氨基-1,3-二甲基嘧啶-2,4(1H,3H)-二酮之间的反应产生了以前未知的5-未取代的6-(1H-苯并咪唑-2-基)吡啶并[2,3-d]嘧啶-2,4(1H,3H)-二酮。该反应在乙酸和酸中沸腾时发生,并且包括根据Hantzsch反应方案的含1,4-二氢吡啶的化合物的形成以及由于N,N-二甲基苯胺的裂解而芳构化。

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