Enantioselective Nickel‐Catalyzed <i>anti</i>‐Arylmetallative Cyclizations onto Acyclic Ketones
Harley Green, Stephen P. Argent, Hon Wai Lam
Abstract
Domino reactions involving nickel-catalyzed additions of (hetero)arylboronic acids to alkynes, followed by cyclization of the alkenylnickel intermediates onto tethered acyclic ketones to give chiral tertiary-alcohol-containing products in high enantioselectivities, are described. The reversible E/Z isomerization of the alkenylnickel intermediates enables overall anti-arylmetallative cyclization to occur. The ring system of the products are substructures of certain diarylindolizidine alkaloids.
Topics & Concepts
Enantioselective synthesisNickelCatalysisChemistryOrganic chemistryStereochemistryCombinatorial chemistryCatalytic C–H Functionalization MethodsAsymmetric Hydrogenation and CatalysisAsymmetric Synthesis and Catalysis