2-oxochromene-3-carboxylic acid/Coumarin-3-Carboxylic Acid
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provides coniferyl ferulate(CAS#:531-81-7) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of coniferyl ferulate are included as well.>> amp version: coniferyl ferulate
Coumarins (2H-chromen-2-one) are oxygen-containing heterocyclic compounds that belong to the benzopyranones family. In this work we have synthesized different coordination complexes with coumarin-3-carboxylic acid (HCCA), o-phenanthroline (phen) and zinc(II). In the reported [Zn(CCA)2(H2O)2] complex, coumarin-3-carboxylate (CCA) is acting as a bidentate ligand while in the two prepared complexes, [Zn(phen)3]CCA(NO3) (obtained as a single crystal) and [Zn(CCA)2phen].4H2O, CCA is acting as a counterion of the complex cation [Zn(phen)3]+2 or coordinated to the metal center along with phen, respectively. These compounds were characterized on the basis of elemental analysis and thermogravimetry. NMR, FTIR and Raman spectroscopies of the compounds and the CCA potassium salt (KCCA) allow to determine several similarities and differences among them. Finally, their behavior against alkaline phosphatase enzyme and their antimicrobial activities were also measured.
Antimicrobial activities; Behavior against alkaline phophatase; Coumarin-3-carboxylic acid; NMR spectroscopy; Vibrational spectroscopy; Zn complexes.
Comparisons of the Spectroscopic and Microbiological Activities Among coumarin-3-carboxylate, O-Phenanthroline and zinc(II) Complexes
Maria S Islas 1, Juan J Martinez Medina 2, Oscar E Piro 3, Gustavo A Echeverria 3, Evelina G Ferrer 1, Patricia A M Williams 4
2018 Jun 5
The activity of kallikrein-related peptidase 6 (KLK6) is deregulated in various diseases such as cancer and neurodegenerative diseases. KLK6 is thus considered as an attractive therapeutical target. In this short report, we depict some novel findings on the regulation of the KLK6 activity. Namely, we identified mechanism-based inhibitors (suicide substrates) from an in-house library of 6-substituted coumarin-3-carboxylate derivatives. In addition, a molecular dynamics study evidenced the allosteric behavior of KLK6 similar to that previously observed for some trypsin-like serine proteases. This allosteric behavior together with the coumarinic scaffold bring new opportunities for the design of KLK6 potent activity modulators, useful as therapeutics or activity-based probes.
kallikrein-related peptidase 6; serine protease allostery; small-organic modulators; suicide substrate.
Insights Into the Activity Control of the Kallikrein-Related Peptidase 6: Small-Molecule Modulators and Allosterism
Feryel Soualmia 1, Elodie Bosc 1, Sabrina Aït Amiri 1, Dirk Stratmann 2, Viktor Magdolen 3, Dalila Darmoul 4 5, Michele Reboud-Ravaux 1, Chahrazade El Amri 1
2018 Sep 25
Evaluation of the characteristics of accelerator-based thermal neutron fields is recognized as an important issue when discussing the effectiveness of boron neutron capture therapy (BNCT). In this study, we propose that the radiation chemical yield (G value) of hydroxyl radicals (Goh•) can be considered a universal parameter for the description of the accelerator-based thermal neutron field. The Goh• of the 10B(n,α)7Li reaction was quantitatively evaluated using an aqueous coumarin-3-carboxylic acid (3CCA) solution, and was discriminated from that of contaminations (i.e., γ rays and fast neutrons). The Goh• of the 10B(n,α)7Li reaction was 0.107 ± 0.004 OH•/100 eV, which is almost equivalent to that exposed to α particles with an energy of 6.0 MeV. Since the Goh• of γ rays from a 60Co source is 2.03 ± 0.05 OH•/100 eV, this lower value suggests that indirect action by the 10B(n,α)7Li reaction is not dominant in BNCT. However, our results indicate that one can assess the 60Co equivalent dose of the 10B(n,α)7Li reaction in water from the Goh• derived using aqueous 3CCA solution in the accelerator-based thermal neutron field.
Radiation Chemical Yield of Hydroxyl Radicals for Accelerator-based Boron Neutron Capture Therapy: Dose Assessment of 10 B(n,α) 7 Li Reaction Using Coumarin-3-Carboxilic Solution
Tamon Kusumoto 1, Ryo Ogawara 1