N-heterocyclic carbene-palladium-imine complex catalyzed α-arylation of ketones with aryl and heteroaryl chlorides under air atmosphere
作者:Hui-Yang Lu、An Shen、Yong-Qing Li、Yu-Cai Hu、Chen Ni、Yu-Cai Cao
DOI:10.1016/j.tetlet.2020.152124
日期:2020.7
synthesized and unambiguously confirmed by X-ray single crystal diffraction. It was found to be an efficient and air-stable catalyst for the α-arylation of ketones. The reaction could be operated in air without any negative effect. Non-activated aryl and heteroaryl chlorides have been successfully applied in the reaction with only 0.5 mol% catalyst loadings under air atmosphere. Excellent to good product yields
N-Heterocyclic Carbene Adducts of Cyclopalladated Ferrocenylpyridazine: Synthesis, Structural Characterization, and Application in ?-Arylation of Ketones with Aryl Chlorides
作者:Chen Xu、Hong-Mei Li、Zhi-Qiang Wang、Wei-Jun Fu、Yu-Qing Zhang、Bao-Ming Ji
DOI:10.1071/ch12035
日期:——
3-chloro-6-pyridazinylferrocene 1 and its N-heterocyclic carbene adducts 2–3 were synthesized and characterized by 1H NMR and IR spectroscopy, ESI-MS, and elemental analysis. Additionally, detailed structures of complexes 2–3 have been determined by single-crystal X-ray analysis. Complex 3 exhibited high catalytic activity for α-arylation of ketones with aryl chlorides. Typically, using 1 mol % catalyst in the presence
Carbene adduct of cyclopalladatedferrocenylimine exhibited highly catalytic activity for the α-arylation of ketones with aryl halides. The corresponding products were obtained in moderate to excellent yields. Such protocol was applied to various ketones and a broad scope of aryl halides including aryl chlorides, bromides as well as unactivated and sterically hindered aryl halides.
water/O2-induced release of cyanide ionsfrom K3Fe(CN)6 and a benzil-cyanide reaction. This strategy gives expedient access to cyanohydrin esters starting directly from broadly accessible aryl benzyl ketones. The cyanide release strategy was further integrated with a copper catalyzed oxygenation-decarbonylation sequence to produce cyanohydrin esters from1,3-diketones.