Figure 1: NHC-catalysed reduction coupling of nitrobenzyl bromide with activated carbonyl compounds.

(a) Formation of benzyl radical via photoredox or NHC catalysis. (b) Reductive coupling of nitrobenzyl bromides and ketones.
(a) Formation of benzyl radical via photoredox or NHC catalysis. (b) Reductive coupling of nitrobenzyl bromides and ketones.