An efficient copper-catalyzed method for the regioselective synthesis of β-difluoroester substituted enamides using BrCF2CO2Et is reported for the first time.
An efficient iridium-catalyzed C(sp2)−H reaction of non-aromatic tertiary enamides was successfully developed under mild reaction conditions and with high regioselectivity, leading to original C-3 borylated enamides in good yields. These derivatives could then be exploited in Suzuki cross-coupling reactions, or converted into valuable 3,3-dihalogenopiperidine derivatives through short reaction times