Versatile ruthenium(ii)-catalyzed C–H cyanations of benzamides
作者:Weiping Liu、Lutz Ackermann
DOI:10.1039/c3cc49502g
日期:——
Direct cyanations of arenes and heteroarenes bearing only weakly coordinating amides were accomplished using a robust ruthenium(II) catalyst. The user-friendly C(sp2)âH activation occurred with the assistance of carboxylate with high site-selectivity, excellent functional group tolerance and ample scope.
A direct C–H bond arylation method for thienyl thioamides catalyzed by [Pd(phen)2](PF6)2 was developed. This reaction selectively afforded 2-monoarylated products, while the corresponding amide thiophenederivatives furnished 2,5-diarylated products. Mechanisticstudies revealed that a Pd(II)–bisthioamide complex should be the active species for the reaction of thienyl thioamides in the presence of