Photoredox-Catalyzed Generation of Tertiary Anions from Primary Amines via a Radical Polar Crossover.

ABSTRACT: A method for the generation of tertiary carbanions via a deaminative radical-polar crossover is reported using redox active imines from α-tertiary primary amines. A variety of benzylic amines and amino esters can be used in this approach, with the latter engaging in a novel "aza-Reformatsky" reaction. Electronic trends correlate the stability of the resulting carbanion with reaction efficiency. The anions can be trapped with different electrophiles including aldehydes, ketones, imines, Michael acceptors, and H₂ O/D₂ O. Selective anion formation can be achieved in the presence of another equivalent or more acidic C-H bond in both an inter- and intramolecular fashion. Mechanistic studies suggest the intermediacy of a discrete carbanion intermediate.

SUBMITTER: Marchese AD 

PROVIDER: S-EPMC10873470 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature