Labelling of anilines, benzylamines and someN-heterocyclics using cycloocta-1,5-dienyliridium(I)-1,1,1,5,5,5-hexafluoro-pentan-2,4-dionate and isotopic hydrogen gas in DMF or DMA
Efficient Water Reduction with sp<sup>3</sup>
-sp<sup>3</sup>
Diboron(4) Compounds: Application to Hydrogenations, H-D Exchange Reactions, and Carbonyl Reductions
作者:Mathias Flinker、Hongfei Yin、René W. Juhl、Espen Z. Eikeland、Jacob Overgaard、Dennis U. Nielsen、Troels Skrydstrup
DOI:10.1002/anie.201709685
日期:2017.12.11
demonstrated by conducting a series of selective reductions of alkynes and alkenes, and hydrogen–deuteriumexchange reactions using two‐chamber reactors. Finally, as the water reduction reaction generates an intermediate borohydride species, a range of aldehydes and ketones were reduced by using water as the hydride source.
The C–H activated controlled mono- and di-olefination of arenes in ionic liquids at room temperature
作者:Kaifeng Du、Tian Yao
DOI:10.1039/c9ra09736h
日期:——
In this study, controlled mono and di-olefination of arenes was first realized at room temperature via the C–H bond activation in ionicliquids, probably due to the positive effects of ionicliquids. It is an energy-saving routes in industrial production without the need for heating equipment. Different catalysts were screened, and it was found that [Ru(p-cymene)Cl2]2 generated mono-olefinated products
Application of neutral iridium(I)<i>N</i>-heterocyclic carbene complexes in<i>ortho</i>-directed hydrogen isotope exchange
作者:Alison R. Cochrane、Stephanie Irvine、William J. Kerr、Marc Reid、Shalini Andersson、Göran N. Nilsson
DOI:10.1002/jlcr.3084
日期:2013.7
Bench-stable complexes of the type [Ir(COD)(NHC)Cl] (NHC = N-heterocyclic carbene) have been investigated within the field of hydrogenisotopeexchange. By employing a sterically encumbered NHC within such complexes and catalyst loadings of only 5 mol%, moderate to high deuterium incorporations were achieved across a range of aromatic ketones and nitrogen-based heterocycles. The simple and synthetically
We first report the direct ortho C–Hamidation of arenes with azides by using a novel and inexpensive RuHCl(CO)(PPh3)3 catalyst. The reaction proceeds efficiently in high yield over a broad range of substrates without requirement of any additional silver salt or additive.
molecular scaffolds from simple precursors. Here, an unprecedented three-component direct C-H addition was achieved in the challenging meta-selective fashion. Fluoroalkyl halides and a wide range of alkenes, including vinylarenes, unactivated alkenes and internal alkenes, were employed as the coupling partners of arenes in this strategy. The detailed mechanism presented is supported by kinetic isotope stud-ies