Novel functionalized 1,2,3-triazole derivatives exhibit antileishmanial activity, increase in total and mitochondrial-ROS and depolarization of mitochondrial membrane potential of Leishmania amazonensis
摘要:
1,2,3-triazolium salts are poorly understood regarding their antileishmanial activity. Hence, as an effort to identify novel chemical scaffolds as antileishmanial agents, a series of 1,2,3-triazolium salts (TS) and corresponding 1,2,3-triazole (T) precursors including new epoxide derivatives were synthesized and assayed against Leishmania amazonensis promastigote and intracellular amastigote forms. Among them, the compound TS-6 exhibited promising activity on promastigotes (IC50 = 3.61 mu M) and intracellular amastigotes (IC50 = 7.61 mu M) of L. amazonensis, superior to miltefosine (IC50 > 10.0 mu M), used as reference drug. In addition, TS-6 showed negligible cytotoxicity on murine peritoneal macrophages with a SI of about 10. Studies on the mode of action of TS-6 indicate mitochondrial dysfunction through an increase in 'total' and mitochondrial-ROS as well as depolarization of mitochondrial membrane potential of L. amazonensis promastigotes. In silico physicochemical studies indicate that the TS-6 could potentially be used as an oral drug.
Benzazepine derivative, process for producing the same, and use
申请人:——
公开号:US20040235822A1
公开(公告)日:2004-11-25
The present invention provides a novel benzazepine derivative represented by formula:
1
wherein, R
1
is a 5- or 6-membered aromatic ring, R
2
is lower alkyl group, etc., Y is an optionally substituted imino group, ring A and ring B are independently an optionally substituted aromatic ring, W is formula —W
1
—X
2
—W
2
— (W
1
and W
2
are independently S(O)
m1
(m1 is 0, 1, or 2), etc., and X
2
is an optionally substituted alkylene group etc.), a preparation method and use thereof.
Partially fluorinated amino acid derivatives as gelling and surface active agents
申请人:Acosta Erick Jose
公开号:US20080113573A1
公开(公告)日:2008-05-15
Disclosed are partially fluorinated amino acid derivatives useful as organogelators and surface treatment materials to provide oil- and water-repellency properties to substrates. Also disclosed are composite materials, comprising a porous support and a porous nanoweb. The porous nanoweb contains fibrous structures of about 10 nm to about 1000 nm effective average fiber diameter as determined with electron microscopy.
The present invention relates to novel phenyl oxazolidinone compounds of formula I, their pharmaceutically acceptable analogs, tautomeric forms, stereoisomers, polymorphs, prodrugs, metabolites, salts or solvates thereof. The invention also relates to the processes for the synthesis of novel compounds of formula I or their pharmaceutically acceptable analogs, tautomeric forms, stereoisomers, polymorphs, prodrugs, metabolites, salts or solvates thereof. The present invention also provides pharmaceutical compositions comprising novel compounds of formula I and methods of using them. The compounds of the present invention are useful as antimicrobial agents, effective against a number of aerobic and/or anaerobic Gram positive and/or Gram negative pathogens such as multi drug resistant species of
Staphylococcus, Streptococcus, Enterococcus, Bacterioides, Clostridia, H. influenza, Moraxella,
acid-fast organisms such as
Mycobacterium tuberculosis
as well as Linezolid resistant species of
Staphylococcus
and
Enterococcus.
作者:Álvaro Farias Arruda da Mata、Nicolas Glanzmann、Pedro Henrique Fazza Stroppa、Felipe Terra Martins、Rafael Pavão das Chagas、Adilson David da Silva、Jorge Luiz Sônego Milani
DOI:10.1039/d2nj02052a
日期:——
CO2, and 1 h), high conversion of all terminal epoxides was achieved, including in a scale-up experiment that produced an outstanding TOF value of 667 h−1. Moreover, a reaction using cyclohexene oxide achieved 85% conversion in only 6 h. In summary, our results show the attractive potential of HO-functionalized 1,2,3-triazole-based ionic liquid catalysts for efficient CO2 conversion to cyclic carbonates
Correlation of structural features of novel 1,2,3-triazoles with their neurotoxic and tumoricidal properties
作者:Elaine Maria de Souza-Fagundes、Johannes Delp、PedroH.D.M. Prazeres、Lucas Bonfim Marques、Arturene Maria Lino Carmo、Pedro Henrique Fazza Stroppa、Nicolas Glanzmann、Jaffar Kisitu、Dàvid Szamosvàri、Thomas Böttcher、Marcel Leist、Adilson David da Silva
DOI:10.1016/j.cbi.2018.06.029
日期:2018.8
Triazoles are interesting templates for novel chemotherapeutic drugs. We synthesized here 17 1,3,4-substituted-1,2,3-triazoles that differed in their l'-substituent (variable alkyl chain lengths C3-C12), the 3'-substituent (no substituent, -methyl or -propyl) or the salt form obtained. Several of the compounds were cytotoxic (mu M range) for tumor cells (HL-60, Jurkat, MCF-7, HCT-116), and when the effect was compared to non-transformed cells (Vero), selectivity ratios of up to 23-fold were obtained. To estimate the liability of these potential drug candidates for triggering neurotoxicity, we used the LUHMES cell-based NeuriTox assay. This test quantifies damage to the neurites of human neurons. The four most potent tumoricidal compounds were found to be neurotoxic in a concentration range similar to the one showing tumor cell toxicity. As the neurites of the LUHMES neurons were affected at > 4-fold lower concentrations than the overall cell viability, the novel triazoles were classified as specific neurotoxicants. The structure-activity relationship (SAR) for neurotoxicity was sharply defined and correlated with the one for anti-neoplastic activity. Based on this SAR, two non-neurotoxic compounds were predicted, and testing in the NeuriTox assay confirmed this prediction. In summary, the panel of novel triazoles generated and characterized here, allowed to define structural features associated with cytotoxicity and neurotoxicity. Moreover, the study shows that potential neurotoxic side effects may be predicted early in drug development if highly sensitive test methods for neurite integrity are applied.