Studies on naphthyridines. Part 2. Synthesis of 4-substituted and 6-substituted 1,6-naphthyridin-5(6H)-ones
作者:Mária Balogh、István Hermecz、Kálmán Simon、Levente Pusztay
DOI:10.1002/jhet.5570260644
日期:——
Ethyl 4-substituted 2-methyl-5-oxo-5,6-dihydro-1,6-naphthyridine-3-carboxylates 3a-h were synthetized in a one-step reaction from diethyl 2,6-diraethylpyridine-3,5-dicarboxylates 1a-h by aminomethinylation with 1,3,5-triazine (2). The 6-substitued derivatives 6a-z,aa-ff could be obtained from diethyl 2-[2-(dimethylamino)-vinyl]-6-methylpyridine-3,5-dicarboxylate (4) either directly or via the isolated
在一步反应中,由2,6-二乙基乙基吡啶-3,5-二乙基酯合成了4-取代的2-甲基-5-氧代5,6-二氢-1,6-萘啶-3-羧酸乙酯3a-h。通过与1,3,5-三嗪(2)进行氨基甲酰化将二羧酸1a-h酯化。由6- [2-(二甲基氨基)-乙烯基] -6-甲基吡啶-3,5-二羧酸二乙酯(4)可以直接或通过分离的中间体2-得到6-取代的衍生物6a-z,aa-ff。 [2-(芳基氨基)-乙烯基]吡啶化合物5a-i。