Synthesis, structural characterization and biological studies of novel mixed ligand Ag(I) complexes with triphenylphosphine and aspirin or salicylic acid
摘要:
Two new mixed ligand silver(I) complexes of formulae {[Ag(tpp)(3)(asp)](dmf)} (1) (aspH = o-acetylsalicylic acid and tpp = triphenylphosphine) and [Ag(tpp)(2)(o-Hbza)] (2) (o-HbzaH = o-hydroxy-benzoic acid) were synthesized and characterized by elemental analyses, spectroscopic techniques and X-ray crystallography at ambient conditions. Three phosphorus and one carboxylic oxygen atoms from a de-protonated aspirin ligand in complex 1 and two phosphorus and two carboxylic oxygen atoms from a chelating o-Hbza anion in complex 2 form a tetrahedral geometry around Ag(I) ions in both complexes.Complexes 1 and 2 and the silver(I) nitrate, tpp, aspNa and o-HbzaH were tested for their in vitro cytotoxic activity against leiomyosarcoma cells (LMS), human breast adenocarcinoma cells (MCF-7) and normal human fetal lung fibroblasts (MRC-5) cells with Thiazolyl Blue Tetrazolium Bromide (MTT) assay. For both cell lines 1 and 2 were found to be more active than cisplatin. Additionally, 1 and 2 exhibit lower activity on cell growth proliferation of MRC-5 cells. The type of LMS cell death caused by 1 and 2 were evaluated in vitro by use of flow cytometry assay. The results show that at concentrations of 1.5 and 1.9 mu M of complex 1, 44.1% and 69.4%, respectively of LMS cells undergo programmed cell death (apoptosis). When LMS cells were treated with 1.6 and 2.3 mu M of 2, LMS cells death was by 29.6% and 81.3%, respectively apoptotic. Finally, the influence of the complexes 1 and 2, upon the catalytic peroxidation of linoleic acid to hydroperoxylinoleic acid by the enzyme lipoxygenase (LOX) was kinetically and theoretically studied. The binding of 1 and 2 towards LOX was also investigated by Saturation Transfer Difference (STD) H-1 NMR experiments. (C) 2011 Elsevier B.V. All rights reserved.
Sialyl Lewis X (SLe(X) analogues) containing beta-1-fucopyranosyl residues with an alkyl [-(CH2)(6)-] (1a), a heteroalkyl [-(CH2)(2)-O-(CH2)(3)-] (Ib)or a heterocycloalkyl [-2-cyclohexyl-O-(CH,),-] (2a) moiety were synthesised by silver ion promoted glycosylation. Further analogues where sialic acid was replaced by a second beta-L-fucopyranosyl (3a, 3b) or hydrogensulphate unit (4a, 4b) were also prepared.
Novel mixed metal Ag(I)-Sb(III)-metallotherapeutics of the NSAIDs, aspirin and salicylic acid: Enhancement of their solubility and bioactivity by using the surfactant CTAB
The already known Ag(I)-Sb(III) compound of the formula Ag(Ph3Sb)3(NO3)} (1) and two novel mixed metal Ag(I)-Sb(III) metallotherapeutics of the formulae Ag(Ph3Sb)3(SalH)}(2) and Ag(Ph3Sb)3(Asp)}(3) (SalH2 = salicylic acid, AspH = aspirin or 2-acetylsalicylic acid and Ph3Sb = triphenyl antimony(III)) have been synthesised and characterised by m.p., vibrational spectroscopy (mid-FT-IR), 13C-,1H-NMR
Untersuchungen zur Glykosidsynthese, V. Reaktionsprodukte und Stereospezifität der Glucosylierung in Gegenwart unlöslicher Silbersalze in Diäthyläther
作者:Günter Wulff、Gerhard Röhle、Ulrich Schmidt
DOI:10.1002/cber.19721050404
日期:1972.4
-α-D-glucopyranoside (z. B. 2b und 5a) auf. Die Umsetzung zum 2.3.4.6-Tetra-O-acetyl-β-D-glucopyranosid verläuft stereospezifisch. Auch Verbindungen mit nicht zur Nachbargruppenbeziehung befähigten Gruppen, wie die beiden anomeren Bromide 9 und 10, liefern unter Walden-Inversion die Glykoside von jeweils entgegengesetzter Konfiguration. Inversion wurde auch beim Einsatz von L-1-Methyl-heptylbromid anstelle einer
Beige der Umsetzung vonα-乙酰溴葡萄糖(z。B. Cholesterin)位于Gegenwart von Silber-4-hydroxy-valerat的Diäthyläther,von Ag 2 O oder von Ag 2 CO 3分布于AllenFällenneben dem entsprechenden 2.3.4.6-四ø乙酰基β-d-glucopyranosid(żB. 2A中geringerer猛恶)模具Alkoholacetate(Z B. Cholesterinacetat。),模具原酸酯(Z B.。4 UND死3.4.6三- )ö -乙酰-β-和-α-D-吡喃葡萄糖苷(z。B. 2b和5a)auf。Die Umsetzung zum 2.3.4.6-Tetra- O-乙酰基-β-D-吡喃葡萄糖苷立体异构体。由Nupbargruppenbezi
Antimicrobial polymer compositions and the use thereof
申请人:Emeta Modesto
公开号:US20060263330A1
公开(公告)日:2006-11-23
An antimicrobial composition comprising: a complex of an anionic polyester with an antimicrobial metal wherein the anionic polyester has at least one carboxylic acid group. A medical device having an antimicrobial composition comprising: a complex of an anionic polyester with an antimicrobial metal wherein the anionic polyester has at least one carboxylic acid group.
The present invention comprises compositions and methods for providing antimicrobial compositions. The antimicrobial compositions comprise gel delivery vehicles comprising stabilized silver, wherein ionic silver is provided to a site for antimicrobial purposes. Methods of making and using such compositions are taught, including application of the silver-containing gel compositions to wounds, burns, abrasions, cuts, surgical incision, sites where skin or organ integrity has been breached, and other sites to supply an antimicrobial environment.
[EN] ANTIMICROBIAL COMPOSITIONS AND METHODS OF MAKING THE SAME<br/>[FR] COMPOSITIONS ANTIMICROBIENNES ET LEURS PROCÉDÉS DE FABRICATION
申请人:KARANDIKAR BHALCHANDRA M
公开号:WO2014179353A1
公开(公告)日:2014-11-06
The present disclosure comprises antimicrobial compositions and devices comprising silver compounds that resist heat and light discoloration. In one aspect, the said compounds comprise silver and at least one s-triazine ring or moiety. In another aspect, the antimicrobial compositions are hydrogels that are effective against broad spectrum of common pathogens including MRSA and VRE and are suitable for treating human or animal wounds and burns. The methods of the present disclosure comprise treating medical and non-medical devices and articles with compositions comprising the silver compounds to impart antimicrobial property.