Synthesis and biological evaluation of α-methyl-chalcone for anti-cervical cancer activity
摘要:
A series of 31 chalcones were synthesized and evaluated for anti-proliferative activity against the human cervical cancer cell lines (HeLa and SiHa). Compound 19, (E)-1-(2,4-dihydroxyphenyl)-3-(4-(dimethylamino)phenyl)-2-methylprop-2-en-1-one was found to be an effective anti-proliferative agent in HeLa and SiHa cells (IC50 = 0.035 mu M). Compound 19 increased the percentage of apoptosis in a dose-dependent manner, as measured by Annexin V-FITC (fluorescein isothiocyanate)/(propidium iodide) PI staining. Molecular modeling studies of compound 19 showed that the most potent structure was docked at the yeast 20 S proteasome binding site (Protein Data Bank code-3E47) and was stabilized in the cavity by various hydrophobic and hydrogen bonding interactions.
Barluenga's reagent with HBF<sub>4</sub>as an efficient catalyst for alkyne-carbonyl metathesis of unactivated alkynes
作者:Kosuke Murai、Keiichiro Tateishi、Akio Saito
DOI:10.1039/c6ob02090a
日期:——
Barluenga's reagent (IPy2BF4, Py = pyridine) treated with HBF4 efficiently catalyzes the inter- and intramolecular alkyne-carbonyl metathesis of unactivated alkynes with aldehydes or ketones, most of which proceed at room temperature. This work represents the first catalytic application of the Barluenga's reagent.
Aldolases as Leitmotiv - A Nonenzymatic Domino Aldol Reaction Triggered by Zinc Bisenolate and Polyenolate (ate) Complexes
作者:Michael Schmittel、Manas K. Ghorai
DOI:10.1055/s-2001-18766
日期:——
A new zinc(II) mediated sequential aldol reaction is described for the diastereoselective one-pot synthesis of tetrahydropyran-2,4-diols. The dependence of the yield on the ratio Zn2 +/enolate proposes that zinc(II) polyenolate and ate complexes may be involved.
Alkynes as Synthetic Equivalents to Stabilized Wittig Reagents: Intra- and Intermolecular Carbonyl Olefinations Catalyzed by Ag(I), BF<sub>3</sub>, and HBF<sub>4</sub>
作者:Jong Uk Rhee、Michael J. Krische
DOI:10.1021/ol050838x
日期:2005.6.1
The first use of cationic silver (AgSbF4) as a catalyst for intra- and intermolecular alkyne-carbonyl coupling to form conjugated enones is described, and a comparison to corresponding Bronsted acid (HBF4) and Lewis acid (BF3) catalyst systems is made. Notably, intermolecular coupling proceeds stereoselectively to afford the corresponding trisubstituted enones as single geometrical isomers. This transformation represents a completely atom economical alternative to the use of stabilized Wittig reagents in carbonyl olefination and may be viewed as a formal alkyne-carbonyl metathesis.
Toke, Laszlo; Clementis, Gyoergy; Petnehazy, Imre, Phosphorus, Sulfur and Silicon and the Related Elements, 1996, vol. 111, p. 183
作者:Toke, Laszlo、Clementis, Gyoergy、Petnehazy, Imre、Jaszay, Zsuzsa M.、Toempe, Peter
DOI:——
日期:——
ZIELINSKI W., POL. J. CHEM., 1980, 54, NO 11-12 2209-2215