Novel Triphenylantimony(V) and Triphenylbismuth(V) Complexes with Benzoic Acid Derivatives: Structural Characterization, in Vitro Antileishmanial and Antibacterial Activities and Cytotoxicity against Macrophages

Molecules

Arshad Islam¹  Jeferson Gomes Da Silva²  Filipe Moan Berbet⁴  Sydnei Magno da Silva⁵  Bernardo Lages Rodrigues¹  Heloisa Beraldo¹  Maria Norma Melo³  Frຝéric Frézard⁴ 

[1] Department of Chemistry, Institute of Exact Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil; E-Mails:;Department of Pharmacy, Federal University of Juiz de Fora (UFJF), Campus Governador Valadares, Av. Dr. Raimundo Monteiro de Rezende, 330, Centro, 35010-177 Governador Valadares, MG, Brazil; E-Mail:;Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil; E-Mail:;Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil; E-Mails:;Laboratory of Parasitology, Institute of Biomedical Sciences, Federal University of Uberlândia (UFU), Av Amazonas, s/n; Umuarama, 38400-902 Uberlândia, Minas Gerais, Brazil; E-Mail:

关键词: organoantimony(V);    organobismuth(V);    carboxylate;    crystal structure;    cytotoxicity;    antileishmanial;    antibacterial;   

DOI  :  10.3390/molecules19056009

来源: mdpi

【 摘 要 】

Two novel organoantimony(V) and two organobismuth(V) complexes of the type ML₂ were synthesized, with L = acetylsalicylic acid (HL1) or 3-acetoxybenzoic acid (HL2) and M = triphenylantimony(V) (M1) or triphenylbismuth(V) (M2). Complexes, [M1(L1)₂] (1), [M1(L2)₂]∙CHCl₃ (2), [M2(L1)₂], (3) and [M2(L2)₂] (4), were characterized by elemental analysis, IR and NMR. Crystal structures of triphenylantimony(V) dicarboxylate complexes 1 and 2 were determined by single crystal X-ray diffraction. Structural analyses revealed that 1 and 2 adopt five-coordinated extremely distorted trigonal bipyramidal geometries, binding with three phenyl groups in the equatorial position and two deprotonated organic ligands (L) in the axial sites. The metal complexes, their metal salts and ligands were evaluated in vitro for their activities against Leishmania infantum and amazonensis promastigotes and Staphylococcus aureus and Pseudomonas aeruginosa bacteria. Both the metal complexes showed antileishmanial and antibacterial activities but the bismuth complexes were the most active. Intriguingly, complexation of organobismuth(V) salt reduced its activity against Leishmania, but increased it against bacteria. In vitro cytotoxic test of these complexes against murine macrophages showed that antimony(V) complexes were the least toxic. Considering the selectivity indexes, organoantimony(V) complexes emerge as the most promising antileishmanial agents and organobismuth(V) complex 3 as the best antibacterial agent.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.