Iridium-Catalyzed Condensation of Amines and Vicinal Diols to Substituted Piperazines
作者:Linda L. R. Lorentz-Petersen、Lars Ulrik Nordstrøm、Robert Madsen
DOI:10.1002/ejoc.201201099
日期:2012.12
A straightforward procedure is described for the synthesis of piperazines from amines and 1,2-diols. The heterocyclization is catalyzed by [Cp*IrCl2]2 and sodium hydrogen carbonate and can be achieved with either toluene or water as solvent. The transformation does not require any stoichiometric additives and only produces water as the byproduct. The reaction can be performed between a 1,2-diamine
Iridium catalysed synthesis of piperazines from diols
作者:Lars Ulrik Nordstrøm、Robert Madsen
DOI:10.1039/b712685a
日期:——
A green and atom-economical method has been developed for the synthesis of piperazines by cyclocondensation of diols and amines in aqueous media in the presence of a catalytic amount of [Cp*IrCl2]2.
A Bifunctional Pd/MgO Solid Catalyst for the One-Pot Selective N-Monoalkylation of Amines with Alcohols
作者:Avelino Corma、Tania Ródenas、MarÃaâ J. Sabater
DOI:10.1002/chem.200901501
日期:2010.1.4
the selective monoalkylation of amines with alcohols. The reaction goes through a series of consecutive steps in a cascade mode that involves: 1) the abstraction of hydrogen from the alcohol that produces the metal hydride and the carbonyl compound; 2) condensation of the carbonyl with the amine to give an imine, and 3) hydrogenation of the imine with the surface hydrogen atoms from the metal hydride