Palladium-catalyzed carbonylative addition of aryl bromides to arylalkynes: a simple and efficient method for chalcone synthesis
作者:Sheng Zhang、Liangguang Wang、Xiujuan Feng、Ming Bao
DOI:10.1039/c4ob01263a
日期:——
Palladium-catalyzedcarbonylative addition of arylbromides to terminal arylalkynes was carried out to produce chalcones in satisfactory to excellent yields. The unprecedented carbonylation reaction proceeded smoothly under mild conditions in the presence of a simple palladium catalyst system (PdCl2/DPPB/iPr2NEt) in N,N-dimethyl formamide.
进行了钯催化的芳基溴化物羰基加成到末端芳基炔烃上,以令人满意的产率获得了查耳酮。在N,N-二甲基甲酰胺中存在简单的钯催化剂体系(PdCl 2 / DPPB / i Pr 2 NEt)的情况下,在温和条件下,史无前例的羰基化反应顺利进行。
Bonsignore,L. et al., Gazzetta Chimica Italiana, 1976, vol. 106, p. 617 - 624
作者:Bonsignore,L. et al.
DOI:——
日期:——
EL-BAYOUKI, KHAIRY A. M.;IBRAHIM, I. H.;LATIF, N., EGYPT. J. CHEM., 29,(1986) N 1, 129-137
作者:EL-BAYOUKI, KHAIRY A. M.、IBRAHIM, I. H.、LATIF, N.
DOI:——
日期:——
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