From Celecoxib to a Novel Class of Phosphodiesterase 5 Inhibitors: Trisubstituted Pyrazolines as Novel Phosphodiesterase 5 Inhibitors with Extremely High Potency and Phosphodiesterase Isozyme Selectivity
作者:Mohammad Abdel-Halim、Sara Sigler、Nora A. S. Racheed、Amr Hefnawy、Reem K. Fathalla、Mennatallah A. Hammam、Ahmed Maher、Yulia Maxuitenko、Adam B. Keeton、Rolf W. Hartmann、Matthias Engel、Gary A. Piazza、Ashraf H. Abadi
DOI:10.1021/acs.jmedchem.0c01120
日期:2021.4.22
trisubstituted pyrazoline scaffold derived from the COX2 inhibitor, celecoxib, was used to develop novel PDE5 inhibitors. Novel pyrazolines were identified with potent PDE5 inhibitory activity lacking COX2 inhibitory activity. Compound d12 was the most potent with an IC50 of 1 nM, which was three times more potent than sildenafil and more selective with a selectivity index of >10,000-fold against all other PDE
Diastereoselective synthesis of diverse 3,2′-pyrrolidinyl bispirooxindoles via 1,3-dipolar cycloaddition reactions of azomethine ylides with exocyclic α,β-unsaturated ketones and <i>in silico</i> studies for prediction of bioactivity
作者:Kartik Dutta、Mukesh Kumar、Sunil K. Ghosh、Amit Das、Raghunath Chowdhury
DOI:10.1080/00397911.2018.1560472
日期:2019.2.1
Abstract A three-component highly regio- and diastereoselective1,3-dipolarcycloaddition reaction between isatin, a series of primary amino acids (10 nos), and exocyclic α,β-unsaturated ketones was developed towards the synthesis of a small library of bispirooxindole (20 nos) at ambient temperature. The developed reaction afforded highly substituted 3,2′-pyrrolidine-bispirooxindole with two vicinal
A Diaminocyclopentadienone iron tricarbonyl complex has been applied in chemoselective hydrogen transfer reductions. This bifunctional iron complex demonstrated a broad applicability in mild conditions in various reactions, such as reduction of aldehydes over ketones, reductive alkylation of various functionalized amines with functionalized aldehydes and reduction of α,β-unsaturated ketones into the
Insoluble organic UV screening agents of aryl vinylene ketone type, and cosmetic use thereof
申请人:——
公开号:US20030053966A1
公开(公告)日:2003-03-20
The invention relates to insoluble organic compounds containing one or more aryl vinylene ketone groups, for screening out UV radiation, in the form of fine particles with an average size of between 10 nm and 5 &mgr;m, and also to their use for protecting the skin, the hair or materials that are sensitive to UV radiation. The said compounds may be obtained by a process of grinding coarse particles in the presence of one or more suitable surfactants.
Direct Carbocyclizations of Benzoic Acids: Catalyst-Controlled Synthesis of Cyclic Ketones and the Development of Tandem aHH (acyl Heck-Heck) Reactions
作者:Kelsey C. Miles、Chi “Chip” Le、James P. Stambuli
DOI:10.1002/chem.201403561
日期:2014.9.1
The formation of exo‐methylene indanones and indenones from simple ortho‐allyl benzoic acid derivatives has been developed. Selective formation of the indanone or indenone products in these reactions is controlled by choice of ancillary ligand. This new process has a low environmental footprint as the products are formed in high yields using low catalyst loadings, while the only stoichiometric chemical