Preparation, characterization and evaluation of novel 1,3,5-triaza-7-phosphaadamantane (PTA)-based palladacycles as anti-cancer agents
摘要:
A series of novel mononuclear 1,3,5-triaza-7-phosphaadamantane (PTA)-based palladacycles were prepared by cleaving m-Cl binuclear orthopalladated dimers of substituted benzylidene-2,6-diisopropylphenylamines. All complexes were fully characterized using IR and NMR spectroscopy, mass spectrometry as well as elemental analysis. In-vitro evaluation of the complexes as anti-cancer agents against the breast-cancer cell lines MCF7 and MDA-MB 231 as well the melanoma cell line ME1402 shows that four of the five complexes tested are active. These palladacycles exhibit their cytotoxicity by inducing DNA damage which subsequently triggers apoptosis. DNA binding studies using electrophoresis and spectroscopic techniques, such as UV-Vis and circular dichroism spectroscopy, confirms that the palladacycle, C2 definitely interacts with DNA. Results from these DNA binding experiments seem to rule out co-valent and intercalative binding, pointing rather to a non-covalent interaction, with electrostatic binding being the most likely possibility. It is envisioned that this would probably involve a hydrolysed or solvated derivative of C2. (C) 2017 Elsevier B.V. All rights reserved.
Palladium(II)-Catalyzed CH Bond Arylation of Electron-Deficient Arenes at Room Temperature
作者:Matthew J. Tredwell、Moises Gulias、Nadine Gaunt Bremeyer、Carin C. C. Johansson、Beatrice S. L. Collins、Matthew J. Gaunt
DOI:10.1002/anie.201005990
日期:2011.2.1
Mild and tolerant: A novel PdII‐catalyzed CH bond arylation with aryl‐BF3K salts transforms various electron‐deficient arenes under mild reaction conditions. Benzaldehydes are functionalized in the ortho position using a temporary imine directing group that controls the cyclopalladation. A broad range of benzaldimines are compatible with this process (see scheme).
Kumar; Krishnakumar; Sobral, Abiiio J. F. N., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2016, vol. 55B, # 10, p. 1231 - 1238
作者:Kumar、Krishnakumar、Sobral, Abiiio J. F. N.、Subash、Swaminathan、Sankaran
DOI:——
日期:——
Kumar; Krishnakumar; Sobral, Abilio J.F.N., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2016, vol. 55B, p. 1231 - 1238
Preparation, characterization and evaluation of novel 1,3,5-triaza-7-phosphaadamantane (PTA)-based palladacycles as anti-cancer agents
作者:A. Blanckenberg、S. Aliwaini、S.W. Kimani、A. van Niekerk、A. Neumann-Mufweba、S. Prince、S.F. Mapolie
DOI:10.1016/j.jorganchem.2017.09.005
日期:2017.11
A series of novel mononuclear 1,3,5-triaza-7-phosphaadamantane (PTA)-based palladacycles were prepared by cleaving m-Cl binuclear orthopalladated dimers of substituted benzylidene-2,6-diisopropylphenylamines. All complexes were fully characterized using IR and NMR spectroscopy, mass spectrometry as well as elemental analysis. In-vitro evaluation of the complexes as anti-cancer agents against the breast-cancer cell lines MCF7 and MDA-MB 231 as well the melanoma cell line ME1402 shows that four of the five complexes tested are active. These palladacycles exhibit their cytotoxicity by inducing DNA damage which subsequently triggers apoptosis. DNA binding studies using electrophoresis and spectroscopic techniques, such as UV-Vis and circular dichroism spectroscopy, confirms that the palladacycle, C2 definitely interacts with DNA. Results from these DNA binding experiments seem to rule out co-valent and intercalative binding, pointing rather to a non-covalent interaction, with electrostatic binding being the most likely possibility. It is envisioned that this would probably involve a hydrolysed or solvated derivative of C2. (C) 2017 Elsevier B.V. All rights reserved.