A photoredox catalyzed iminyl radical-triggered C–C bond cleavage/addition/Kornblum oxidation cascade of oxime esters and styrenes: synthesis of ketonitriles
A photoredox-catalyzed iminyl radical-triggered C–C bond cleavage/addition/Kornblum oxidation cascade of cycloketone oxime esters and styrenes in DMSO is described. This three-component, one-pot procedure features mild conditions, a broad substrate scope, and high functional group tolerance, providing an efficient approach to access diversely functionalized ketonitriles.
Divergent Iron-Catalyzed Coupling of<i>O</i>-Acyloximes with Silyl Enol Ethers
作者:Hai-Bin Yang、Nicklas Selander
DOI:10.1002/chem.201605636
日期:2017.2.3
An iron‐catalyzedcoupling reaction of O‐acyloximes and O‐benzoyl amidoximes with silyl enol ethers is reported. The protocol provides access to functionalized pyrroles, 1,6‐ketonitriles, pyrrolines and imidazolines via carbon‐centered radicals generated from an initially formed iminyl radical. The intramolecular cyclization and ring‐opening processes of the iminyl radical take place preferentially
Visible light-induced palladium-catalyzed ring opening β-H elimination and addition of cyclobutanone oxime esters
作者:Wei-Long Xing、Rui Shang、Guang-Zu Wang、Yao Fu
DOI:10.1039/c9cc08077e
日期:——
A palladium catalyst under visible light irradiation activates cyclobutanone oxime ester through single electron transfer to induce radical ringopening to generate hybrid cyanoalkyl Pd(I) radical species. Hybrid cyanoalkyl Pd(I) radical species can undergo either β-H elimination to deliver (E)-4-arylbut-3-enenitrile or undergo radical addition with silyl enol ether and enamide to generate δ-cyano
A room‐temperature, visible‐light‐driven N‐centered iminyl radical‐mediated and redox‐neutral C−C single bond cleavage/radical addition cascade reaction of oxime esters and unsaturated systems has been accomplished. The strategy tolerates a wide range of O‐acyl oximes and unsaturated systems, such as alkenes, silyl enol ethers, alkynes, and isonitrile, enabling highly selective formation of various
Electrochemical Aerobic Oxygenation and Nitrogenation of Cyclic Alkenes via C═C Bond Cleavage or Oxygenation and Azidation of Open-Chain Alkenes
作者:Yan Zhu、Cong Jiang、Heng Li、Ping Liu、Peipei Sun
DOI:10.1021/acs.joc.2c01293
日期:2022.8.19
electrochemical C═C double-bond cleavage and functionalization of cyclic alkenes for the synthesis of ketonitriles is described. This transformation features environmentally friendly conditions and utilizes relatively safe TMSN3 as the nitrogenation reagent and molecular oxygen as the oxidant. For the open-chain alkenes, the reaction gave 1,2-difunctionalized products. A wide range of cyclic alkenes and open-chain