Synthesis and biological activity of mono- and diamides of 2,3-secotriterpene acids
摘要:
Amides of four types were synthesized derived from 2,3-seco-18 alpha H-oleanane and 2,3-secolupane mono- and dicarboxylic acids. The spectrum of diamide derivatives was expanded with C3-C3' and C28-C28' biscondensed amides with two A-secotriterpene backbones obtained by the interaction of monocarboxylic A-seco acids with lysine. Among the synthesized monoand diamide derivatives, potential inhibitors of herpes simplex virus type 1 replication were found, namely, some compounds with an ethyl beta-alaninate fragment (EC50 8.7 and 4.1 mu M). The ethyl beta-alaninate diamide was shown to combine antiherpetic and anti-HIV activity (EC50 5.1 mu M). For the active compounds, the ratios of maximum tolerable concentrations to EC50 ranged from 9.7 to 40.8. The synthesized amides did not show any marked cytotoxic effects against human rabdomiosarcoma RD TE32, A549 lung carcinoma, and melanoma MS cell lines.
The immunotropic activity of lupane and oleanane 2,3-seco-triterpenoids
摘要:
The immunotropic effect of the 2,3-seco derivatives of allobetulon, betulonic acid, and the methyl ester of betulonic acid were studied. It was found that the highest activity is shown by compounds with an oleanane fragment. The presence of a free C28-carboxyl group enhances the activity of lupane 2,3-seco derivatives. A significant contribution to the development of the immune response is introduced by a functional group at the C3 atom in the A ring-the C3-carboxy derivatives intensify the processes of antibody production and alter the number and ratio of leukocyte forms. It is shown that 2,3-seco-1-cyano-19 beta,28-epoxy-18 alpha-olean-3-oic acid stimulates humoral immunity with a positive influence on hematopoiesis.
Synthesis and evaluation of antiviral activities of triterpenic conjugates with 2-aminobutan-1-ol as potent microbicidal agents
作者:Irina A. Tolmacheva、Ekaterina V. Igosheva、Olga V. Savinova、Eugene I. Boreko、Vladimir F. Eremin、Victoria V. Grishko
DOI:10.1007/s00044-019-02401-w
日期:2019.10
triterpenic A ring on the level of antiviral activity of triterpenic C3, C28 amides with a residue of racemic, (S), or (R)-enantiomeric 2-aminobutan-1-ol against herpes simplex viruses type I (HSV-I) and type II (HSV-II), as well as against human immunodeficiency virus type I (HIV-1) was investigated. The 2,3-secolupane racemic amide 5a was selected as a potent microbicidal agent with the highest virus inhibitory
Synthesis and antiviralactivity of 2,3-seco-derivatives of betulonic acid
作者:I. A. Tolmacheva、V. V. Grishko、E. I. Boreko、O. V. Savinova、N. I. Pavlova
DOI:10.1007/s10600-009-9436-5
日期:2009.9
A lupane 2,3-seco-aldehydoacid that was oxidized further to the 2,3-seco-diacid was synthesized by Beckmann fragmentation of the α-hydroxyoxime of betulonic acid. It was found that both 2,3-seco-derivatives were capable of suppresing reproduction of Herpes type 1 and flu A viruses (EC50 from 1.9 to 21.3 μM).
Synthesis and antiviral activity of C-3(C-28)-substituted 2,3-seco-triterpenoids
作者:I. A. Tolmacheva、E. V. Igosheva、O. V. Savinova、E. I. Boreko、V. V. Grishko
DOI:10.1007/s10600-014-0821-3
日期:2014.1
Amide conjugates with four structural types of β-amino alcohols were synthesized from 2,3-seco-18αH-oleananoic and 2,3-seco-lupane C-3(C-28) mono- and dicarboxylic acids. Esters were prepared by reaction of C-3-hydroxy derivatives of A-seco-triterpenoids with dicarboxylic acid anhydrides. The antiviral activity of the synthesized compounds was studied against herpes simplex virus type I. The most active amide was 5a (5.7 μM, MTC/EC50 32.2).