화학공학소재연구정보센터
Journal of the American Chemical Society, Vol.140, No.13, 4489-4493, 2018
Nickel-Catalyzed Enantioselective Pyridone C-H Functionalizations Enabled by a Bulky N-Heterocyclic Carbene Ligand
Annulated pyridones are an important scaffold found in many biologically active compounds. A Ni(0)-catalyzed C-H functionalization of 2- and 4-pyridones is disclosed, providing access to annulated pyridones via enantioselective intramolecular olefin hydroarylation. Key to the success of the transformation was the development of a sterically hindered and tunable N-heterocyclic carbene ligand resembling a chiral version of IPr. This ligand allows for mild reaction temperatures, and leads to the annulated pyridones in excellent yields and enantioselectivities.