Palladium-catalysed direct regioselective C5-arylation of a thiophene bearing a cyclopropyl ketone group at C2
作者:Anissa Beladhria、Aditya L. Gottumukkala、Chiraz Youssef、Charles Beromeo Bheeter、Hamed Ben Ammar、Ridha Ben Salem、Henri Doucet
DOI:10.1016/j.catcom.2013.07.014
日期:2013.11
at C2 was successfully employed in palladium-catalyseddirectarylation. The reaction proceeds regioselectively at C5 without decomposition of the cyclopropyl ketone substituent. These couplings were performed employing as little as 0.5 mol% of ligand-free Pd(OAc)2 catalyst with electron-deficient arylbromides. A wide variety of functional groups on the arylbromide such as nitrile, nitro, acetyl, formyl