Di-<i>tert</i>-butylneopentylphosphine (DTBNpP): An Efficient Ligand in the Palladium-Catalyzed α-Arylation of Ketones
作者:Steven M. Raders、Jessica M. Jones、Jeffrey G. Semmes、Steven P. Kelley、Robin D. Rogers、Kevin H. Shaughnessy
DOI:10.1002/ejoc.201402474
日期:2014.11
palladium(II) acetate provide an efficient catalytic system for the α-arylation of ketones. Aryl bromides were coupled with ketones using 0.25–0.5 mol-% Pd(OAc)2/DTBNpP in toluene at 50 °C, whereas aryl chlorides required a higher catalyst loading (0.5–2.0 mol-%) and a higher temperature (80 °C). Coupling of 2-bromophenol with ketones using the Pd/DTBNpP system provides an efficient route for the synthesis
One-Pot Synthesis of Benzofurans via Palladium-Catalyzed Enolate Arylation with <i>o</i>-Bromophenols
作者:Christian Eidamshaus、Jason D. Burch
DOI:10.1021/ol801510n
日期:2008.10.2
A one-pot synthesis of benzofurans which utilizes a palladium-catalyzed enolate arylation is described. The process demonstrates broad substrate scope and provides differentially substituted benzofurans in moderate to excellent yields. The utility of the method is further demonstrated by the synthesis of the natural product eupomatenoid 6 in three steps.
Synthesis of potential allosteric modulators of Hsp90 by chemical glycosylation of Eupomatenoid-6
作者:Laura Morelli、Anna Bernardi、Sara Sattin
DOI:10.1016/j.carres.2014.03.006
日期:2014.5
Hsp90 (Heat shock protein-90) is a chaperone protein and an established anti-apoptotic target in cancer therapy. Most of the known small-molecule inhibitors that have shown potent antitumor activity target the Hsp90 N-terminal domain and directly inhibit its ATP-ase activity. Many of these molecules display important secondary effects. A different approach to Hsp90 inhibition consists of targeting
A novel base-promoted intramolecular cyclization approach for the synthesis of benzofurans, benzothiophenes and indoles
作者:Qianqian Zhang、Hanyu Nie、Kun Zhang、He Huang、Chuanjun Song
DOI:10.1016/j.tet.2022.132815
日期:2022.6
A facile transition-metal-free method for the synthesis of benzofuran was developed via potassium t-butoxide promoted intramolecular cyclization of o-bromobenzylketones. This method showed a wide range of substrate tolerability affording substituted benzofurans in moderate to good isolated yields. In addition, thio-ketones and imines could also be converted to corresponding benzothiophenes and indoles