117192-38-8Relevant academic research and scientific papers
A new mixed amino-amido N-heterocyclic carbene based on anthranilic acid
Makhloufi, Abdelaziz,Wahl, Michaela,Frank, Walter,Ganter, Christian
, p. 854 - 861 (2013/03/28)
The synthesis of a new mixed amino-amido N-heterocyclic carbene (type A) starting from anthranilic acid is presented. A new straightforward synthetic approach to related diaminocarbenes of type B is also described. Both NHCs react with group 6 elements to form heteroureas and coordinate to L2ClM fragments (M = Rh, Ir; L2 = COD, (CO)2). IR spectroscopic analysis of the carbonyl complexes reveals that the diamino-NHC is a better donor ligand (TEP: 2054 cm-1) compared to the amino-amido NHC (TEP: 2060 cm-1). In line with this behavior, a carbene dimerization to give the corresponding olefin is observed only for derivatives of type A. X-ray structure determinations are reported for two Rh complexes of ligand A and its cationic precursor.
