Amination of aliphatic alcohols with urea catalyzed by ruthenium complexes: effect of supporting ligands

In the present study, ruthenium-catalyzed amination of alcohols by urea as a convenient ammonia carrier in the presence of free diphosphine ligands has been described. A number of ruthenium-phosphine complexes have been studied among which, [(Cp)RuCl(dppe)] was found as an efficient catalyst for alc...

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Bibliographic Details
Published in:Journal of coordination chemistry 2020-07, Vol.73 (13), p.1954-1966
Main Authors: Dindar, Sara, Nemati Kharat, Ali
Format: Article
Language:English
Subjects:
Aliphatic alcohols
Aliphatic compounds
Amination reaction
Amines
Ammonia
borrowing hydrogen method
Conversion
Coordination compounds
Crystal structure
Crystallography
diphosphine ligands
half-sandwich ruthenium complex
homogeneous catalyst
Ligands
Phosphines
Raw materials
Ruthenium compounds
Selectivity
urea
Ureas
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Summary:In the present study, ruthenium-catalyzed amination of alcohols by urea as a convenient ammonia carrier in the presence of free diphosphine ligands has been described. A number of ruthenium-phosphine complexes have been studied among which, [(Cp)RuCl(dppe)] was found as an efficient catalyst for alcohol amination reaction. The crystal structures of two new half-sandwich ruthenium complexes, [(Cp)RuCl(dppe)] and [(C 6 H 6 )RuCl 2 (PHEt 2 )], were determined by X-ray crystallographic analysis. Also the effect of using different supporting phosphines, ratio of raw materials and reaction temperature on conversion and selectivity was investigated. Under optimum reaction conditions high conversion (98%) and chemo-selectivity toward secondary amines were obtained.
ISSN:0095-8972
1029-0389
DOI:10.1080/00958972.2020.1804058