Antibacterial and antifungal activity of acyclic and macrocyclic uracil derivatives with quaternized nitrogen atoms in spacers
摘要:
The reactions of 1,3-bis(alpha,omega-bromoalkyl)-6-methyluracils with 1,3-bis(alpha,omega-ethylaminoalkyl)-6-methyluracils or 1,3-bis(bromopentyl)thymine with butylamine afforded pyrimidinophanes containing one or two uracil units and nitrogen atoms in bridging polymethylene chains. In some cases individual geometric isomers of pyrimidinophanes differing in the mutual arrangement of the carbonyl and methyl groups at different pyrimidine rings were isolated. Quaternization of the bridging nitrogen atom with o-nitrobenzyl bromide, benzyl bromide, n-decyl bromide gave rise to water-soluble pyrimidinophanes which were evaluated for their antibacterial and antifungal activity. The arrangement of the carbonyl groups in macrocycles doesn't affect the activity. Antibacterial and antifungal activity of pyrimidinophanes increases with the increase of polymethylene N-(pyr)-N-chain length and dramatically increases upon the introduction of n-decyl substituent at nitrogen atoms in spacers. Pyrimidi-nophanes with 5 and 6 methylene groups in N(pyr)-N-chain and n-decyl substituent showed significant bacteriostatic, fungistatic, bactericidal, fungicidal activity which comparable with standard antibacterial and antifungal drugs. Acyclic counterpart demonstrated the highest activity against fungi. Toxicity of more effective pyrimidinophanes was determined for mice and Daphnia magna Straus. (c) 2006 Elsevier SAS. All rights reserved.
The reactions of 1,3-bis(omega-bromobutyl- or -pentyl)-6-methyluracil with 1,3-bis(omega-ethyl-aminobutyl- or -pentyl)-6-methyluracil afforded pyrimidinophanes containing N atoms in bridging polymethylene chains. Individual geometric isomers of pyrimidinophanes were isolated. The structure of one of these isomers was established by X-ray diffraction analysis. Quaternization of the bridging N atoms with o-nitrobenzyl bromide gave rise to water-soluble pyrimidinophanes.
Macrocyclic derivatives of 6-methyluracil as ligands of the peripheral anionic site of acetylcholinesterase
作者:Vyacheslav E. Semenov、Rashit Kh. Giniyatullin、Sofya V. Lushchekina、Ekaterina D. Kots、Konstantin A. Petrov、Alexandra D. Nikitashina、Oksana A. Minnekhanova、Vladimir V. Zobov、Evgeny E. Nikolsky、Patrick Masson、Vladimir S. Reznik
DOI:10.1039/c4md00225c
日期:——
selectivity for human acetylcholinesterase (AChE), with an inhibitory power 100–200 times higher than for human butyrylcholinesterase (BChE). Docking simulations indicate specific binding of pyrimidinophanes 2a and 4 onto the peripheral anionicsite of AChE. Other compounds bind to the active center of AChE as well as to the peripheral anionicsite. These compounds are dual binding site inhibitors. Pyrimidinophane
The reactions of 1,3-bis(alpha,omega-bromoalkyl)-6-methyluracils with 1,3-bis(alpha,omega-ethylaminoalkyl)-6-methyluracils or 1,3-bis(bromopentyl)thymine with butylamine afforded pyrimidinophanes containing one or two uracil units and nitrogen atoms in bridging polymethylene chains. In some cases individual geometric isomers of pyrimidinophanes differing in the mutual arrangement of the carbonyl and methyl groups at different pyrimidine rings were isolated. Quaternization of the bridging nitrogen atom with o-nitrobenzyl bromide, benzyl bromide, n-decyl bromide gave rise to water-soluble pyrimidinophanes which were evaluated for their antibacterial and antifungal activity. The arrangement of the carbonyl groups in macrocycles doesn't affect the activity. Antibacterial and antifungal activity of pyrimidinophanes increases with the increase of polymethylene N-(pyr)-N-chain length and dramatically increases upon the introduction of n-decyl substituent at nitrogen atoms in spacers. Pyrimidi-nophanes with 5 and 6 methylene groups in N(pyr)-N-chain and n-decyl substituent showed significant bacteriostatic, fungistatic, bactericidal, fungicidal activity which comparable with standard antibacterial and antifungal drugs. Acyclic counterpart demonstrated the highest activity against fungi. Toxicity of more effective pyrimidinophanes was determined for mice and Daphnia magna Straus. (c) 2006 Elsevier SAS. All rights reserved.
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作者:R. Kh. Giniyatullin、A. S. Mikhailov、V. E. Semenov、V. D. Akamsin、V. S. Reznik、A. V. Chernova、G. M. Doroshkina、A. A. Nafikova、Sh. K. Latypov、Yu. Ya. Efremov、D. R. Sharafutdinova、A. T. Gubaidullin、I. A. Litvinov
DOI:10.1023/a:1025653328231
日期:——
The reactions of 1,3-bis(omega-bromobutyl- or -pentyl)-6-methyluracil with 1,3-bis(omega-ethyl-aminobutyl- or -pentyl)-6-methyluracil afforded pyrimidinophanes containing N atoms in bridging polymethylene chains. Individual geometric isomers of pyrimidinophanes were isolated. The structure of one of these isomers was established by X-ray diffraction analysis. Quaternization of the bridging N atoms with o-nitrobenzyl bromide gave rise to water-soluble pyrimidinophanes.