Synthesis of Electron-Rich CNN-Pincer Complexes, with N-Heterocyclic Carbene and (<i>S</i>)-Proline Moieties and Application to Asymmetric Hydrogenation
作者:Mèrce Boronat、Avelino Corma、Camino González-Arellano、Marta Iglesias、Félix Sánchez
DOI:10.1021/om900894k
日期:2010.1.11
the silver carbene transfer route from the respective silver complex. The reaction with [RhCl(cod)]2 (cod = cycloocta-1,5-diene), PdCl2(CH3CN)2, or K[AuCl4] affords the corresponding cationic [Rh(cod)(ligand)]Cl, [PdCl(ligand)]Cl, and [AuCl(ligand)]Cl2 complexes in which the ligand functions effectively in a CNN coordination mode. The complexes catalyze the enantioselective hydrogenation of prochiral
新的手性CNN-钳型金,钯和铑的含N-杂环卡宾取代基和(络合物小号- )ñ -叔作为手性助剂已被合成并研究了不对称氢化丁基甲基-吡咯烷-2-甲酰胺。通过银卡宾转移路线从相应的银配合物制备配合物。与[RhCl(cod)] 2(cod =环辛-1,5-二烯),PdCl 2(CH 3 CN)2或K [AuCl 4 ]反应可得到相应的阳离子[Rh(cod)(配体)] Cl,[PdCl(配体)] Cl和[AuCl(配体)] Cl 2配体在CNN配位模式下有效发挥作用的复合物。该络合物催化前手性烯烃的对映选择性氢化。对映选择性对NHC N-取代基非常敏感,导致主要对映异构体发生有用的转换。