A rapid and facile synthesis of new spiropyrimidines from 5-(2-arylethylidene-2-oxo)-1, 3-dimethylpyrimidine-2, 4, 6-triones

LL Gozalishvili, TV Beryozkina, IV Omelchenko… - Tetrahedron, 2008 - Elsevier
A series of new tetraazaspiro [5, 5]-undec-4-ene-2, 7, 9, 11-tetraones have been obtained by
reaction of 5-(2-arylethylidene-2-oxo)-1, 3-dimethylpyrimidine-2, 4, 6-triones with ureas. A …

Efficient Synthesis of Uracil‐Derived Hexa‐ and Tetrahydropyrido[2,3‐d]pyrimidines

N Tolstoluzhsky, P Nikolaienko… - European Journal of …, 2013 - Wiley Online Library
Abstract A reaction of 6‐amino‐1, 3‐dimethyluracil with 3‐(hetero) aroylacrylic acids and
their methyl esters leads to hexahydropyrido [2, 3‐d] pyrimidine‐5‐carboxylic acids or the …

Contributions by Professor VD Orlov to the chemistry of nitrogen heterocycles

NN Kolos, SA Komykhov - Chemistry of Heterocyclic Compounds, 2019 - Springer
This article provides a general overview and detailed discussion on the research by
Professor VD Orlov (at the Chair of Organic Chemistry, Kharkiv VN Karazin National …

Reactions of 3-aroylacrylates with α-aminoazoles

NN Kolos, LU Kovalenko, VA Borovskoy - Chemistry of Heterocyclic …, 2011 - Springer
Dihydro derivatives of pyrazolo [3, 4-b] pyridine-, pyrazolo [1, 5-a] pyrimidine-, and [1, 2, 4]
triazolo-[1, 5-a] pyrimidinecarboxylates have been prepared by cyclocondensation of β …

2-(2-aryl-2-oxoethyl)-4H-benzo-1, 4-thiazin-3-ones as products of the reaction of 2-aminothiophenol with β-aroylacrylic acids

TV Beryozkina, NN Kolos, VD Orlov… - … , Sulfur, and Silicon, 2004 - Taylor & Francis
Full article: 2-(2-ARYL-2-OXOETHYL)-4H-BENZO-1,4-THIAZIN-3-ONES AS PRODUCTS OF
THE REACTION OF 2-AMINOTHIOPHENOL WITH β-AROYLACRYLIC ACIDS Skip to Main …

Efficient ytterbium triflate catalyzed microwave-assisted synthesis of 3-acylacrylic acid building blocks

NV Tolstoluzhsky, NY Gorobets, NN Kolos… - Journal of …, 2008 - ACS Publications
The derivatives of 4-(hetero) aryl-4-oxobut-2-enoic acid are useful as building blocks in the
synthesis of biologically active compounds. An efficient general protocol for the synthesis of …

Synthesis, study of the structure, and modification of the products of the reaction of 4-aryl-4-oxobut-2-enoic acids with thiourea

NN Kolos, NV Nazarenko, SV Shishkina… - Chemistry of …, 2020 - Springer
A number of previously undescribed derivatives of 2-amino-5-(2-aryl-2-oxoethyl) thiazol-4 (5
H)-one containing electron-donating substituents in the aromatic ring were synthesized by …

Multicomponent and domino reactions of 3-aroylacrylic acids in the synthesis of heterocycles

TV Beryozkina, NN Kolos, VA Bakulev - Chemistry of Heterocyclic …, 2016 - Springer
This review generalizes the data available on heterocyclizations of 3-aroylacrylic acids and
their esters, published over the previous 15 years. Multicomponent, cascade, and domino …

Synthesis of 7-Amino-2-aryl-4-(N-arylcarbamoyl)-5-phenyl-3, 4-dihydroimidazo [1, 5-b] pyridazines.

NN Kolos, TV Berezkina - Chemistry of Heterocyclic …, 2005 - search.ebscohost.com
The article discusses the results of a study on the reactions of N-arylamides of β-aroylacrylic
acids 5a-f with diamine. When the reagent are boiled in ethaol, the products of the reaction …

Triazines, tetrazines and fused ring polyaza systems

C Ochoa, P Goya, C Gomez - Progress in Heterocyclic Chemistry, 2005 - Elsevier
Publisher Summary This chapter provides an overview on the synthesis and reactions of
Triazines, Tetrazines, and Fused Ring Polyaza Systems. This chapter describes the …