There are provided compounds of the formula
wherein X, Y, R
1
, R
2
, R
3
, R
3
, R
4
, R
5
, R
6
and R
7
are as described herein and enantiomers and pharmaceutically acceptable salts and esters thereof. The compounds are useful as anticancer agents.
Synthesis, Characterization and Assessment of Local Anesthetic Activity of Some Benzohydroxamic Acids
作者:Ekhlas Sheakh Aldeen、Tilal Elsaman、Malik Suliman Mohamed、Mohamed E. Adam、Magdi Awadalla Mohamed
DOI:10.14233/ajchem.2019.21621
日期:——
In the present investigation, 6 compounds (E1-E6) were synthesized by reaction of ethyl esters of p-substituted benzoic acid with hydroxylamine. The chemical structures of the synthesized hydroxamic acids were verified on the basis of spectral analysis (IR, 1H NMR, 13C NMR and mass spectra). The benzohydroxamic acids were examined for potential local anesthetic activity using foot withdrawal reflex of the frog and benzocaine was used as standard drug. Compounds were tested at two different solvents; 5 % DMSO and 0.65 % NaOH, each solution was tested at three different concentration levels (40, 100 and 200 μg/mL). Local anesthetic activity of the compounds differed according to the concentration level and selected solvent. Compounds E4 and E5 were found to be the most active and were comparable to the standard drug in tested solvents at all investigated concentrations. All compounds displayed an enhanced activity in the the aqueous basic solutions.
treating Alzheimer's disease (AD), which has a complex pathogenetic mechanism. In this study, the HDAC inhibitor core is incorporated into the acetylcholine esterase (ACE) inhibitor acridine–derived moiety. Some resulting compounds exhibited higher class IIa HDAC (4, 5, 7, and 9)- and class IIb HDAC6-inhibiting activity than did the reference SAHA as a pan-HDAC inhibitor in clinical practice. One of these
Nickel-Based Dye-Sensitized Photocathode: Towards Proton Reduction Using a Molecular Nickel Catalyst and an Organic Dye
作者:Bart van den Bosch、Jeroen A. Rombouts、Romano V. A. Orru、Joost N. H. Reek、Remko J. Detz
DOI:10.1002/cctc.201600025
日期:2016.4.6
co‐immobilized on NiO to form a solely Ni‐based photocathode. The electron‐transfer steps were investigated by using various techniques (IR, UV/Vis, and fluorescence spectroscopy, and (photo)electrochemistry). Despite the observed successful single‐electron‐transfer steps between all of the components, photocatalysis did not yield any hydrogen gas. Possible bottlenecks that prevent photocatalytic proton reduction
Hydroxamic acid and its derivatives as inhibitors of melanocyte tyrosinase for topical skin lighteners
申请人:Integriderm, Inc.
公开号:US20030199558A1
公开(公告)日:2003-10-23
Methods, compounds, and formulations are provided to reduce pigmentation in mammalian skin, comprising hydroxamic acid and its derivatives, and especially benzohydroxamic acid and its derivatives. The compounds preferably inhibit pigment synthesis in melanocytes through inhibition of melanocyte tyrosinase. The methods can be used for lightening skin, and for treating uneven skin complexions, which result from hyperpigmentation-related medical conditions such as melasma, age spots, freckles, ochronosis, and lentigo. The compounds can be used medically or cosmetically, and preferably as topical formulations.