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Synthesis, structure, and catalytic activity of group 4 complexes with new chiral binaphthyldiamine-based ligands
- Source :
-
Inorganic Chemistry Communications . May2010, Vol. 13 Issue 5, p666-670. 5p. - Publication Year :
- 2010
-
Abstract
- Abstract: Five group 4 metal complexes (1)2Zr(NMe2)2 (5), (2)2Ti(NMe2)2 (6), (2)2Zr(NMe2)2 (7), (3)2Zr (8) and (4)2Ti(NMe2)2 (9) have been readily prepared from the reaction between M(NMe2)4 (M=Ti, Zr) and chiral binaphthyldiamine-based ligands, (R)-2,2′-bis(diphenylthiophosphoramino)-1,1′-binaphthyl (1H2), (R)-5,5′,6,6′,7,7′,8,8′-octahydro-2,2′-bis(diphenylthiophosphoramino)-1,1′-binaphthyl (2H2), (R)-5,5′,6,6′,7,7′,8,8′-octahydro-2,2′-bis(methanesulphonylamino)-1,1′-binaphthyl (3H2), and C 1-symmetric ligand, (R)-2-(mesitylenesulphonylamino)-2′-(dimethylamino)-1,1′-binaphthyl (4H). All the complexes have been characterized by various spectroscopic techniques, elemental analyses and X-ray diffraction analyses. The zirconium amides are active catalysts for the asymmetric hydroamination/cyclization of aminoalkenes, affording cyclic amines in good yields with moderate ee (enantiomeric excess) values. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 13877003
- Volume :
- 13
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Inorganic Chemistry Communications
- Publication Type :
- Academic Journal
- Accession number :
- 50361631
- Full Text :
- https://doi.org/10.1016/j.inoche.2010.03.015