One-step exchange-labelling of pyridines and other N-heteroaromatics using deuterium gas: catalysis by heterogeneous rhodium and ruthenium catalysts
摘要:
A wide range of pyridines and other nitrogen heteroaromatics can be labelled with deuterium at room temperature and pressure by isotopic exchange with deuterium gas in THF in the presence of rhodium black, ruthenium black or 5% rhodium on alumina. The labelling is rapid, isotope efficient and applicable to both electron-rich and electron-poor substrates. In a few cases, a degree of reduction accompanies the exchange. (c) 2006 Elsevier Ltd. All rights reserved.
One-step exchange-labelling of pyridines and other N-heteroaromatics using deuterium gas: catalysis by heterogeneous rhodium and ruthenium catalysts
作者:Efstathios Alexakis、John R. Jones、William J.S. Lockley
DOI:10.1016/j.tetlet.2006.05.106
日期:2006.7
A wide range of pyridines and other nitrogen heteroaromatics can be labelled with deuterium at room temperature and pressure by isotopic exchange with deuterium gas in THF in the presence of rhodium black, ruthenium black or 5% rhodium on alumina. The labelling is rapid, isotope efficient and applicable to both electron-rich and electron-poor substrates. In a few cases, a degree of reduction accompanies the exchange. (c) 2006 Elsevier Ltd. All rights reserved.
Cyclometallated Rhodium(III) Complexes with Diimine Ligands
作者:Urs Mäder、Alex Von Zelewsky、Titus Jenny
DOI:10.1002/hlca.19860690515
日期:1986.7.30
The synthesis of a mononuclear Rh(III) complex, as a representative example of a series of related species, containing two cyclometallatingligands ppy (2-phenylpyridine) and one diimine bpy (2,2′-bipyridine) from a binuclear Cl-bridged compound is described. The absorption spectrum shows a maximum at 364 nm (ε = 7000), with a very weak shoulder (ε = 10) at 454 nm. This band is tentatively assigned