Benzenesulfonyl Chlorides: Alternative Coupling Partners for Regiocontrolled Palladium-Catalyzed Direct Desulfitative 5-Arylation of Furans
作者:Ridha Ben Salem、Henri Doucet、Anissa Beladhria、Kedong Yuan、Hamed Ben Ammar、Jean-Francois Soulé
DOI:10.1055/s-0033-1340188
日期:——
further transformations. The use of these reactants demonstrates the potential of benzenesulfonylchlorides as coupling partners to access to functionalized 5-arylfurans. The reactivity of furan derivatives in palladium-catalyzed desulfitative arylation was studied. Alkyl-substituted furan derivatives were successfully coupled with a variety of benzenesulfonylchloridesusing a phosphine-free catalyst;
The direct 5-arylation of furans at very lowcatalystloading using Pd(OAc)2 as catalyst without added ligand proceed in high yields. Turnover numbers up to 10000 have been obtained for the coupling of several activated aryl bromides. A wide range of functions on the furan or aryl bromide is tolerated.