The reaction of electron-rich aminoheterocycles with 1,3-CCC-dielectrophiles, such as 3-formylchromones, acylpyruvates, and chalcone, provided diversely fused pyridines. Starting from 5-amino-1-(2,3-O-isopropylidene-β-d-ribofuranosyl)-1H-pyrazole, nucleosides containing a pyrazolo[3,4-b]pyridine fragment were obtained, which can be considered as adenosine deaminase (ADA) inhibitors.
Regioselective Direct Arylation of Fused 3-Nitropyridines and Other Nitro-Substituted Heteroarenes: The Multipurpose Nature of the Nitro Group as a Directing Group
作者:Viktor O. Iaroshenko、Ashot Gevorgyan、Satenik Mkrtchyan、Tatevik Grigoryan、Ester Movsisyan、Alexander Villinger、Peter Langer
DOI:10.1002/cctc.201402715
日期:2015.1
We report Pd‐ and Ni‐catalysed, guided and regioselective CH arylations of a series of fused 3‐nitropyridines. The method described here is a facile tool for the chemical functionalisation of drug‐like fused pyridines. The scope and limitations of the reaction, the chemical potential of the nitrogroup and a putative reaction mechanism are discussed.
3-Methoxalylchromone—a novel versatile reagent for the regioselective purine isostere synthesis
作者:Satenik Mkrtchyan、Viktor O. Iaroshenko、Sergii Dudkin、Ashot Gevorgyan、Marcelo Vilches-Herrera、Gagik Ghazaryan、Dmitriy M. Volochnyuk、Dmytro Ostrovskyi、Zeeshan Ahmed、Alexander Villinger、Vyacheslav Ya. Sosnovskikh、Peter Langer
DOI:10.1039/c0ob00379d
日期:——
The first synthesis of 3-methoxalylchromone was described. The reaction of the latter with electron-rich aminoheterocycles afforded a set of heteroannelated pyridines bearing a CO2Me substituent located at the α-position of the pyridine core.
Design, synthesis and transformation of some heteroannulated 3-aminopyridines—purine isosteres with exocyclic nitrogen atom
作者:Viktor O. Iaroshenko、Marcelo Vilches-Herrera、Ashot Gevorgyan、Satenik Mkrtchyan、Knar Arakelyan、Dmytro Ostrovskyi、Muhammad S.A. Abbasi、Linda Supe、Ani Hakobyan、Alexander Villinger、Dmitriy M. Volochnyuk、Andrei Tolmachev
DOI:10.1016/j.tet.2012.11.026
日期:2013.1
The synthesis of 1-deazapurines and isosteres bearing the exocyclic nitrogen atom at position-1 was developed basing on the formal [3+3]-cyclization reaction of nitro-malonaldehyde with the set of electron-excessive aminoheterocycles. Through the functionalization of the purine-like scaffolds synthesized the diversity of compounds furnished in the possition-1 with aryl, alkinyl, and vinyl rests, were obtained. (C) 2012 Elsevier Ltd. All rights reserved.