Triazole-enabled, iron-catalysed linear/branched selective C-H alkylations with alkenes.

Iron-catalysed C-H alkylations with alkenes were achieved on benzamides by N -triazole assistance. A notable switch of the regioselectivity from linear to branched was observed depending on the nature of the olefin employed. The approach allowed for the synthesis of a family of decorated benzamides with ample scope and high levels of chemo-, regio- and site-selectivity.