Synthesis and anti-viral activity of azolo-adamantanes against influenza A virus
摘要:
Chemotherapy and chemoprophylaxis of influenza is one of the most important directions of health protection activity. Due to the high rate of drug-resistant strains of influenza virus, there is a need for the search and further development of new potent antivirals against influenza with a broad spectrum of activity. In the present study, a set of di-, tri- and tetrazole derivatives of adamantane was efficiently prepared and their anti-influenza activities evaluated against rimantadine-resistant strain A/Puerto Rico/8/34. In general, derivatives of tetrazole possessed the highest virus-inhibiting activity. We demonstrated that several compounds of this set exhibited much higher activity than the currently used antiviral rimantadine, a compound of related structure. Moreover, we showed that these azolo-adamantanes were significantly less toxic. This study demonstrates that influenza viruses can be inhibited by adamantylazoles and thus have potential for developing antiviral agents with an alternate mechanism of action. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis and anti-viral activity of azolo-adamantanes against influenza A virus
摘要:
Chemotherapy and chemoprophylaxis of influenza is one of the most important directions of health protection activity. Due to the high rate of drug-resistant strains of influenza virus, there is a need for the search and further development of new potent antivirals against influenza with a broad spectrum of activity. In the present study, a set of di-, tri- and tetrazole derivatives of adamantane was efficiently prepared and their anti-influenza activities evaluated against rimantadine-resistant strain A/Puerto Rico/8/34. In general, derivatives of tetrazole possessed the highest virus-inhibiting activity. We demonstrated that several compounds of this set exhibited much higher activity than the currently used antiviral rimantadine, a compound of related structure. Moreover, we showed that these azolo-adamantanes were significantly less toxic. This study demonstrates that influenza viruses can be inhibited by adamantylazoles and thus have potential for developing antiviral agents with an alternate mechanism of action. (C) 2009 Elsevier Ltd. All rights reserved.
Preparation of 1,3-Functionalized Adamantanes by the Lewis Acid Catalyzed Electrophilic Cyclization of 7-Methylenebicyclo[3.3.1]nonan-3-one in the Presence of π- and<i>N</i>-Nucleophiles
作者:George A. Olah、Ramesh Krishnamurti、G. K. Surya Prakash
DOI:10.1055/s-1990-26967
日期:——
Preparation of 1,3-difunctionalized adamantane derivatives from 7-methylenebicyclo[3.3.1] nonane-3-one (1) in the presence of nucleophiles under Lewis acid catalysis is described. Reaction of 1 with benzene using a variety of Lewis acid catalysts gave 1,3-diphenyladamantane (4) as the major product. Trimethylsilyl cyanide and azide efficiently reacted with 1 in the presence of zinc iodide as the catalyst to give good yields of the corresponding 3-trimethylsiloxyadamantyl isocyanide and azide, respectively. Trimethylsilyl isothiocyanate gave a 1:1 mixture of the thiocyanate and isothiocyanate derivatives. Silyl enol ethers, such as those of acetophenone and cyclopentanone, and allyltrimethylsilane also reacted with 1 to afford the corresponding 1,3-difunctionalized adamantanes.