Enaminones as building blocks in organic synthesis: A novel route to polyfunctionally substituted benzonitriles, pyridines, eneylbenzotriazoles and diazepines
作者:Abu Zeid A. Hassanien、Said A. S. Ghozlan、Mohamed H. Elnagdi
DOI:10.1002/jhet.5570400205
日期:2003.3
An efficient synthesis of enaminones 1a-c is reported. Compounds 1a-c reacted with diefhyl-3-amino-2-cyanopenten-1,5-dicarboxylate (3) to yield the benzonitriles 6. On the other hand, the reaction of la-c with 3-amino-2-cyano-2-pentene dinitrile (7) afforded a mixture of benzonitriles 10 and pyridines 9. The reaction of la-c with 3-aminocrotononitrile 11 has afforded the 4-substituted-3-cyano-2-methylpyridines
报道了烯胺酮1a-c的有效合成。化合物1a-c与-3-二氨基-2-氰基戊烯-1,5-二羧酸二乙酯反应(3),得到苄腈6。另一方面,la-c与3-氨基-2-氰基-2-戊烯二腈(7)的反应得到苄腈10和吡啶9的混合物。la-c与3-氨基巴豆腈11的反应提供了4-取代的-3-氰基-2-甲基吡啶15a-c。乙二胺与la-c的反应得到5-取代的2,3-二氢-1 H-[1,4]二氮杂18 18a-c。另一方面,la-c与邻苯二胺反应生成4-(2-氨基苯乙氨基)-取代的烯胺酮21。在乙酸溶液中用亚硝酸钠处理后,化合物21可转化为苯并三唑基亚酮22。