724794-61-0Relevant articles and documents
Steric factors on unsymmetrical O-hydroxyaryl N-Heterocyclic carbene ligands prevailing the stabilization of single stereoisomer of bis-ligated titanium complexes
Quadri, Coralie C.,Lalrempuia, Ralte,Fr?ystein, Nils ?ge,T?rnroos, Karl W.,Le Roux, Erwan
, p. 106 - 116 (2018/03/06)
Bis-ligated titanium (IV) metal complexes supported by bidentate unsymmetrical o-hydroxyaryl-substituted N-heterocyclic carbene ligands were synthesized and structurally identified. While the direct addition of the doubly deprotonated bulky imidazolidiniu
Improved microwave synthesis of unsymmetrical N,N'-diaryl-1,2-aminoethane and imidazolidinium salts as precursors of N-heterocyclic carbenes
Ibrahim, Yehia A.,Al-Awadi, Nouria A.,Al-Azemi, Talal F.,John, Elizabeth
, p. 38869 - 38876 (2014/11/08)
Lithium aluminium hydride reduction of bis-unsymmetric-diaryloxamides 3 is difficult to accomplish especially for the sterically hindered mesityl derivative. Using microwaves LAH reduction of 3a,d was successful in a short time, however, with cleavage of the ether linkage to give compounds 11a,d. Extension of this method enabled the reduction of bis-oxamide derivatives 13 to the corresponding tetraamine derivative 14 which was then converted to the bis-imidazolidinium salt 15. Application of this method led to rapid reduction of unsymmetric N,N'-diaryloxamides 16 to the corresponding N,N'- diarylethylenediamines 17 which were converted to their corresponding imidazolidinium salts 18. the Partner Organisations 2014.
Olefin polymerization catalyst and polymerization process
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, (2008/06/13)
A polymerization catalyst for the polymerization and copolymerization of olefin monomers and the copolymerization of olefin monomers with other monomers selected from, for example, norbornenes and styrenes are disclosed. The polymerization catalysts disclosed contain a metal center selected from Ti, Zr, Hf, Ni and Pd with at least one chelating ligand.
