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.
The present invention relates to a novel pyrido[2,3-d]pyrimidine derivative having the formula (1):
wherein each of R, and R2, which may be the same or different, is a lower alkyl group; and each of R3 and R4, which may be the same or different, is hydrogen, halogen, hydroxy, nitro, amino, hydroxyamino, hydrazino, azido, a lower alkenylamino group or a lower alkylamino group which may optionally be substituted by hydroxy; and pharmaceutically acceptable salt thereof. These compounds are useful as anti-allergic agents, for example, for the treatment of bronchial asthma, urticaria, allergic rhinitis, allergic dermatoses or allergic conjunctivitis.
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.