Synthesis of substituted 1,2-dihydropyridines by reaction of ethyl N-arylmalonamates with ethyl 2-(ethoxymethylidene)-3-oxobutanoate
作者:S. S. Hayotsyan、A. H. Hasratyan、A. A. Sargsyan、A. Kh. Khachatryan、A. E. Badasyan、S. G. Kon’kova、M. S. Sargsyan
DOI:10.1134/s1070428016060166
日期:2016.6
Michael addition of ethyl N-arylmalonamates to ethyl 2-(ethoxymethylidene)-3-oxobutanoate in ethanol in the presence of triethylamine at room temperature afforded the corresponding adducts which underwent cyclization to diethyl 1-aryl-6-methyl-2-oxo-1,2-dihydropyridine-3,5-dicarboxylates in 17–65% yield. N-Alkylmalonamic acid esters failed to react with ethyl 2-(ethoxymethylidene)-3-oxobutanoate under
在室温下在三乙胺存在下,在乙醇中将N-芳基丙二酸乙酯的迈克尔加成至2-(乙氧基亚甲基)-3-氧代丁酸乙酯中,得到相应的加合物,将其环合成1-乙基-6-芳基-2-甲基-2-氧代-1 ,2-二氢吡啶-3,5-二羧酸酯的产率为17-65%。在类似条件下,N-烷基丙二酸酯不能与2-(乙氧基亚甲基)-3-氧代丁酸乙酯反应。