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 ethyl2-(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 ethyl2-(ethoxymethylidene)-3-oxobutanoate under
Synthesis of Diethyl 6-Amino-1,4-diaryl-2-oxo-1,2,3,4-tetrahydropyridin-3,5-dicarboxylates Based on the Reaction of Arylmethylidenecyanoacetic Esters with N-Arylamidoesters of Malonic Acid
作者:K. A. Avagyan、M. S. Sargsyan、A. E. Badasyan、A. A. Sargsyan、A. G. Manukyan、G. A. Panosyan、A. G. Ayvazyan、A. Kh. Khachatryan
DOI:10.1134/s1070363223040035
日期:2023.4
Abstract The reaction of arylmethylidenecyanoacetic esters with N-arylamides of malonic acid led to the formation of previously unknown diethyl 6-amino-1,4-diaryl-2-oxo-1,2,3,4-tetrahydropyridine-3,5-dicarboxylates in 15–83% yields. Antibacterial activity of some obtained compounds was studied.
Synthesis of ethyl 5-acetyl-1-R-4-aryl-6-hydroxy-6-methyl-2-oxopiperidine-3-carboxylates
作者:M. S. Sargsyan、S. S. Hayotsyan、A. Kh. Khachatryan、A. E. Badasyan、G. A. Panosyan、S. G. Kon’kova
DOI:10.1007/s10593-013-1212-6
日期:2013.3
The reaction of arylidene acetylacetones and ethoxycarbonylacetamides in the presence of triethyl-amine was found to lead to the formation of ethyl 5-acetyl-1-R-4-aryl-6-hydroxy-6-methyl-2-oxo-piperidine-3-carboxylates.
Synthesis of substituted dihydropyridines by reacting ethoxymethylidenemalonate with malonic acid N-arylamidoesters
作者:S. S. Hayotsyan、S. G. Kon’kova、A. G. Hasratyan、A. Kh. Khachatryan、A. E. Badasyan、A. A. Sargsyan、G. A. Panosyan、M. S. Sargsyan
DOI:10.1134/s1070363216100145
日期:2016.10
Reactions of ethoxymethylidenemalonate with malonic acid N-arylamidoesters in the presence of triethylamine afforded diethyl 1-aryl-6-hydroxy-2-oxo-1,2-dihydropyridine-3,5-dicarboxylates via the cyclization of Michael adducts. In the presence of sodium ethoxide the formed adducts may be also involved into simultaneous retro-Michael reaction leading to the formation of ethyl 1-aryl-5-arylcarbamoyl-6-hydroxy-2-oxo-1,2-dihydropyridine-3-carboxylates. Direction of heterocyclization or retro-Michael reaction is determined by the acidity of the hydrogen atoms of adducts and basicity of catalyst.