Tethered NHC Ligands for Stereoselective Alkyne Semihydrogenations
作者:Felix Pape、Johannes Teichert
DOI:10.1055/s-0036-1590112
日期:2017.6
N-heterocyclic carbene (NHC) complexes have been investigated, leading to a highly Z-selective transformation. The catalyst is generated from inexpensive copper(I) chloride in situ and allows catalytic semihydrogenation down to 10 bar H2. A copper(I)-catalyzed semihydrogenation of internal alkynes has been developed. A variety of oxygen- and nitrogen-tethered N-heterocyclic carbene (NHC) complexes
摘要 已经开发了铜(I)催化的内部炔烃的半氢化反应。已经研究了多种氧和氮束缚的N-杂环卡宾(NHC)配合物,从而导致高度Z选择性的转化。该催化剂由廉价的原位氯化铜(I)生成,并允许低至10 bar H 2的催化半氢化作用。 已经开发了铜(I)催化的内部炔烃的半氢化反应。已经研究了多种氧和氮束缚的N-杂环卡宾(NHC)配合物,从而导致高度Z选择性的转化。该催化剂由廉价的原位氯化铜(I)生成,并允许低至10 bar H 2的催化半氢化作用。
Functionalised Saturated-Backbone Carbene Ligands: Yttrium and Uranyl Alkoxy-Carbene Complexes and Bicyclic Carbene-Alcohol Adducts
作者:Polly L. Arnold、Ian J. Casely、Zoë R. Turner、Christopher D. Carmichael
DOI:10.1002/chem.200801321
日期:2008.11.17
A new and modular route to bidentate ligands that combines an alkoxide with a saturated backbone N-heterocyclic carbene (NHC) is presented. The bi(heterocyclic) compounds are formally the addition product of a saturated NHC and the alcohol group of the N-functionalised arm. Using these compounds, the synthesis and structural characterisation of the first electropositive metal complexes of saturated