Reactions of diethyl 2-(ethoxymethylene)malonate with 2-cyanoacetanilides: unexpected transfer of the ethoxymethylene moiety
作者:Nikolay Yu. Gorobets、Valeriya P. Tkachova、Roman P. Tkachov、Oleksandr D. Dyachenko、Eduard B. Rusanov、Vladimir D. Dyachenko
DOI:10.3998/ark.5550190.0011.b21
日期:——
A sodium ethoxide catalyzed reaction of N-substituted cyanoacetanilides 1a-f with diethyl 2-(ethoxymethylene)malonate 2 unexpectedly leads to the corresponding 2-amino-5-cyano-6oxo-N,1-diaryl-1,6-dihydropyridine-3-carboxamides 3a-f, while the expected 5-cyano-2hydroxy-6-oxo-1-aryl-1,6-dihydropyridine-3-carboxylates 4a-f were observed only as minor products.
N-取代的氰基乙酰苯胺 1a-f 与 2-(乙氧基亚甲基)丙二酸二乙酯 2 的乙醇钠催化反应出人意料地生成了相应的 2-amino-5-cyano-6oxo-N,1-diaryl-1,6-dihydropyridine-3 -carboxamides 3a-f,而预期的 5-cyano-2hydroxy-6-oxo-1-aryl-1,6-dihydropyridine-3-carboxylates 4a-f 仅作为次要产物被观察到。