A novel protocol for the copper-catalysed direct C(sp3)–H bond functionalisation of 2-alkyl azaarenes to CO double bonds has been developed, which expands the scope of C(sp3)–H bond activation reactions and provides new access to medicinally important azaarene derivatives.
![[double bond, length as m-dash]](http://www.rsc.org/images/entities/char_e001.gif)
O double bonds has been developed, which expands the scope of C(sp3)–H bond activation reactions and provides new access to medicinally important 
