Allylbenzimidazole as a strategic surrogate in Rh-catalyzed stereoselective -propenylation of aryl C(sp)-H bond

A Rh-catalyzed C(sp 2 )-H propenylation has been reported by taking N -allyl benzimidazole as an allylamine congener. This transformation has been observed for the first time, where a tandem process of C-H allylation followed by alkene isomerization delivers a highly stereoselective trans -propenylated product. Detailed mechanistic studies including the characterization of rhodacycle-intermediates have been conducted to understand the mechanism. A Rh-catalyzed C(sp 2 )-H propenylation has been reported by using N -allyl benzimidazole as an allylamine congener.