N-HETEROCYCLIC CARBENE-AMIDO PALLADIUM(II) CATALYSTS AND METHOD OF USE THEREOF
申请人:Jung Kyung Woon
公开号:US20100036131A1
公开(公告)日:2010-02-11
A new N-heterocyclic catalyst system which contains N-heterocyclic carbene and amido as ligands, which are strongly bound to a palladium metal. Another heteroatom functionality can be used as a third ligand L. The NHC-amidate ligand system is unique in structure, and shows excellent reactivities in a number of chemical reactions. The chemical reactions include carbon-carbon and carbon-heteroatom (oxygen and nitrogen) bond formations, and oxidation reactions of saturated carbon chemicals via C—H activation.
作者:Jaewon Choi、Hye Yun Yang、Hae Jin Kim、Seung Uk Son
DOI:10.1002/anie.201003101
日期:2010.10.11
Hollow‐sphere catalysts were prepared by means of 3D network formation between a tetraimidazolium building block and palladium acetate. The bis(N‐heterocyclic carbene)–palladiumspecies that were concomitantly formed during growth of the hollowspheres showed excellent activity as heterogeneous catalysts in one‐pot three‐component Streckerreactions of ketones (see picture; TMS=trimethylsilyl).
Highly efficient and convenient Strecker reaction of carbonyl compounds and amines with TMSCN catalyzed by MCM-41 anchored sulfonic acid as a recoverable catalyst
作者:Mohammad G. Dekamin、Zahra Mokhtari
DOI:10.1016/j.tet.2011.10.087
日期:2012.1
sulfonic acid (MCM-41–SO3H) was found to be a highly efficient and recoverable heterogeneous catalyst for the three-component Streckerreaction of aldehydes or ketones and diverse amines using trimethylsilyl cyanide (TMSCN) to afford the corresponding α-aminonitriles under mild conditions in high to quantitative yields. The simple experimental procedure along with easy recovery and reusability of the
Magnetic Solid Sulfonic Acid Decorated with Hydrophobic Regulators: A Combinatorial and Magnetically Separable Catalyst for the Synthesis of α-Aminonitriles
作者:Akbar Mobaraki、Barahman Movassagh、Babak Karimi
DOI:10.1021/co500022g
日期:2014.7.14
A three-component, Strecker reaction of a series of aldehydes or ketones, amines, and trimethylsilyl cyanide for the synthesis of alpha-aminonitriles in the presence of a catalytic amount of a magnetic solid sulfonic acid catalyst, Fe3O4@SiO2@Me&Et-PhSO3H under solvent-free conditions have been investigated. This catalyst, with a combination of hydrophobicity and acidity on the Fe3O4@SiO2 core-shell of the magnetic nanobeads, as well as its water-resistant property, enabled easy mass transfer and catalytic activity in the Strecker reaction. The catalyst was easily separated by an external magnet and the recovered catalyst was reused in 6 successive reaction cycles without any significant loss of activity.