USE OF ARYL CHLORIDES IN PALLADIUM-CATALYZED C-H BOND FUNCTIONALIZATION
申请人:Daugulis Olafs
公开号:US20090012293A1
公开(公告)日:2009-01-08
A one-step method for efficiently converting carbon-hydrogen bonds into carbon-carbon bonds using chloroarenes and palladium catalysts is disclosed. This method allows faster introduction of complex molecular entities, a process that would otherwise require many more steps. This invention is particularly relevant for the organic synthesis of complex molecules such as, but not limited to, pharmacophores.
One-Pot Synthesis of Unsymmetrical N-Heterocyclic Carbene Ligands from<i>N</i>-(2-Iodoethyl)arylamine Salts
作者:B. A. Bhanu Prasad、Scott R. Gilbertson
DOI:10.1021/ol901189m
日期:2009.8.20
approach that provides symmetrical, unsymmetrical, and asymmetric N-heterocyclic carbene (NHC) ligands is reported. Reaction of iodoethanol with aniline provides N-(2-iodoethyl)arylamine salts that are then converted to the corresponding iodide. Reaction with aliphatic or aromatic amines followed by triethyl orthoformate was used to provide 26 different NHC ligands.
Aminolysis of Bis[bis(trimethylsilyl)amido]iron and -cobalt as a Versatile Route to N-Heterocyclic Carbene Complexes
作者:Andreas A. Danopoulos、Pierre Braunstein、Neoklis Stylianides、Marcel Wesolek
DOI:10.1021/om200951m
日期:2011.12.26
N-heterocyclic carbene complexes of iron(II) and cobalt(II) have been conveniently obtained by the aminolysis of bis[bis(trimethylsilyl)amido]iron and -cobalt precursors with imidazol(in)ium salts. Whereas sterically less hindered salts produced the tetrahedral complexes [M(carbene)2Cl2] (M = Fe), bulkier salts gave the three-coordinate [M(carbene)N(SiMe3)2}Cl] (M = Fe, Co), which serve as versatile
Highly Efficient Ruthenium Catalysts for the Formation of Tetrasubstituted Olefins via Ring-Closing Metathesis
作者:Ian C. Stewart、Thay Ung、Alexandre A. Pletnev、Jacob M. Berlin、Robert H. Grubbs、Yann Schrodi
DOI:10.1021/ol0705144
日期:2007.4.1
[reaction: see text] A series of ruthenium-based metathesis catalysts with N-heterocyclic carbene (NHC) ligands have been prepared in which the N-aryl groups have been changed from mesityl to mono-ortho-substituted phenyl (e.g., tolyl). These new catalysts offer an exceptional increase in activity for the formation of tetrasubstituted olefins via ring-closingmetathesis (RCM), while maintaining high