Revealing Silylation of C(sp
<sup>2</sup>
)/C(sp
<sup>3</sup>
)–H Bonds in Arylphosphines by Ruthenium Catalysis
作者:Jian Wen、Ben Dong、Jinjun Zhu、Yue Zhao、Zhuangzhi Shi
DOI:10.1002/anie.202003865
日期:2020.6.26
The first aromatic C−H silylation between arylphosphines and hydrosilanes enabled by a ruthenium complex has been developed. The excellent ortho ‐selectivity results from a four‐membered metallacyclic intermediate involving phosphorus chelation. The developed system can be extended to the benzylic C−H silylation of arylphosphines. Diverse silylated arylphosphines are produced, exhibiting broad functional
Mono and dinuclear palladium complexes of o-alkyl substituted arylphosphane ligands: Solvent-dependent syntheses, NMR-spectroscopic characterization and X-ray crystallographic studies
作者:Sauli Vuoti、Matti Haukka、Jouni Pursiainen
DOI:10.1016/j.jorganchem.2007.07.052
日期:2007.10
ane)]2 were also determined. We report a systematic, solvent-dependent method to prepare palladium(II) complexes of the aryl phosphines o-methylphenyldiphenylphosphane, o-cyclohexylphenyldiphenylphosphane and o-phenylphenyldiphenylphosphane with a desired nuclearity. We demonstrated that chlorinated solvents promote the formation of dinuclear chlorine-bridged palladium complexes for all five ligands
在各种溶剂中用膦配体邻甲基苯基二苯基膦,邻乙基苯基二苯基膦,邻异丙基苯基二苯基膦,邻环己基苯基二苯基膦和邻苯基苯基二苯基膦制备邻烷基取代的膦的氯化钯(II)配合物。配合物的结构通过1 H NMR和31 P NMR光谱及元素分析进行表征。PdCl 2(邻甲基苯基二苯基膦)2,PdCl 2(o-异丙基苯基二苯基膦)2,PdCl 2(邻环己基苯基二苯基膦)2,PdCl 2(邻苯基苯基二苯基膦)2,[PdCl 2(邻甲基苯基二苯基膦)] 2,[PdCl 2(邻乙基苯基二苯基膦)] 2和[PdCl 2(o -环己基苯基二苯基膦)] 2也被确定。我们报告了一种系统的,依赖溶剂的方法来制备芳基膦o的钯(II)配合物-甲基苯基二苯基膦,邻环己基苯基二苯基膦和邻苯基苯基二苯基膦具有所需的核。我们证明了氯化溶剂促进了所有五个配体的双核氯桥钯复合物的形成。在起始溶剂仅微溶于溶剂的其他溶剂中,配体优先形成单核钯配合物。
Selective Hydrogenation Catalyst and Methods of Making and Using Same
申请人:Cheung Tin-Tack Peter
公开号:US20100228065A1
公开(公告)日:2010-09-09
A composition comprising a supported hydrogenation catalyst comprising palladium and an organophosphorous compound, the supported hydrogenation catalyst being capable of selectively hydrogenating highly unsaturated hydrocarbons to unsaturated hydrocarbons. A method of making a selective hydrogenation catalyst comprising contacting a support with a palladium-containing compound to form a palladium supported composition, contacting the palladium supported composition with an organophosphorus compound to form a catalyst precursor, and reducing the catalyst precursor to form the catalyst. A method of selectively hydrogenating highly unsaturated hydrocarbons to an unsaturated hydrocarbon enriched composition comprising contacting a supported catalyst comprising palladium and an organophosphorous compound with a feed comprising highly unsaturated hydrocarbon under conditions suitable for hydrogenating at least a portion of the highly unsaturated hydrocarbon feed to form the unsaturated hydrocarbon enriched composition.
the aroylcobalt complexes 11 and 12, respectively. Complex 6 reacts with iodomethane in an oxidative substitution reaction yielding a structurally characterized octahedral complex mer-13, which eliminates a methyl group in THF at 20 °C to form a pentacoordinate cobalt(II) complex 14. Complex 3 oxidatively adds iodomethane in a stereoselective cis addition to give the cobalt(III) complex mer-15, which
Synthesis of methyl-palladium(<scp>II</scp>) and -platinum(<scp>II</scp>) complexes containing labile chelates and olefinic tertiary phosphine ligands: intramolecular insertion of an olefin into a palladium–carbon bond, and activation of a carbon–hydrogen bond by a platinum(<scp>II</scp>) complex
作者:Kingsley J. Cavell、Hong Jin
DOI:10.1039/dt9950004081
日期:——
Heating the palladium–dpvp complexes in benzene leads to intramolecular migratory insertion of the vinyl double bond of the phosphine into the Pd–Me bond to give complexes with a five-membered palladacyclic ring, [Pd(L–L)PPh2(C6H4CHCH2Me)}]. In contrast, warming the platinum complex [PtMe(pyca)(dpvp)] leads to a cyclometallation reaction forming a platinacycle with a platinum–alkenyl bond [Pt(pyca)PPh2(C6H4CCH2)}]