linear copolymer and a cross-linked organogel. The polymers proved highly efficient as recyclable catalysts in the reductive N-alkylation of arylamines under mild conditions and at exceptionally low catalyst loadings. The modular design presented herein can be readily adapted to other finely tuned triarylboranes, enabling wide applications of ROMP-borane polymers as well-defined supported organocatalysts
Reductive Umpolung of Carbonyl Derivatives with Visible-Light Photoredox Catalysis: Direct Access to Vicinal Diamines and Amino Alcohols via α-Amino Radicals and Ketyl Radicals
Visible-light-mediated photoredox-catalyzed aldimine-aniline and aldehyde-aniline couplings have been realized. The reductive single electron transfer (SET) umpolung of various carbonylderivatives enabled the generation of intermediary ketyl and α-amino radical anions, which were utilized for the synthesis of unsymmetrically substituted 1,2-diamines and amino alcohols.
An endocyclic enamide having a unique bicyclic structure including a 1,2,4‐triazine‐3,6‐dione subunit was used as an olefin partner in the Povarov reaction. This represents an efficient strategy to access a new family of fused tetracyclic N‐heterocycles which combine in their structure two scaffolds of interest in medicinal chemistry, a tetrahydroquinoline (THQ and an aza‐diketopiperazine (aza‐DKP)