Synthesis and Evaluation of Antiplasmodial Activity of 2,2,2-Trifluoroethoxychalcones and 2-Fluoroethoxy Chalcones against Plasmodium falciparum in Culture
A general, mild and efficient palladium-catalyzed 2,2,2-trifluoroethoxylation of activated aryl bromides and bromo-chalcones: bromo-chalcones a new coupling partner in cross-coupling reaction
作者:T.M. Rangarajan、Kavita Devi、Ayushee、Ashok K. Prasad、Rishi Pal Singh
DOI:10.1016/j.tet.2015.08.071
日期:2015.10
2-trifluoroethoxylation of activated aryl bromides and bromo-chalcones has been developed. We unveil a fascinating insight into the Pd-catalyzed C–O cross-coupling reaction. Pd/tBuXPhos (L1) ligand system facilitates the C–O cross-coupling reaction between 2,2,2-trifluoroethanol and activated aryl bromides at both higher (115 °C) and lower temperatures (40 °C). Unprecedentedly, this catalyst system facilitates the
A general and efficient Pd-catalyzed rapid 2-fluoroethoxylation of bromo-chalcones
作者:T.M. Rangarajan、Kavita Devi、Akhilesh K. Verma、Rishi Pal Singh、Raj Pal Singh
DOI:10.1016/j.jfluchem.2016.04.013
日期:2016.6
An efficient unprecedented Pd-catalyzed rapid 2-fluoroethoxylation of bromo-chalcones has been unveiled. The oxygen nucleophiles (fluoroalcohols) experience the rapid C-O bond forming reaction for the first time, albeit the alcohols are known to be a weak nucleophile and have greater competing beta-hydride elimination in the transition-metal-catalyzed (especially Pd and Cu) C-O cross-coupling reaction. The higher fluoroalcohols have also been effectively coupled with bromo-chalcones with relatively lower rate. (C) 2016 Elsevier B.V. All rights reserved.