Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/2124
Título: Coordination Chemistry of the (eta(6)-p-Cymene)ruthenium(II) Fragment with Bis-, Tris-, andTetrakis(pyrazol-1-yl)borate Ligands: Synthesis, Structural, Electrochemical, and CatalyticDiastereoselective Nitroaldol Reaction Studies
Autor: Pettinari, Claudio
Marchetti, Fabio
Cerquetella, Adele
Pettinari, Riccardo
Monari, Magda
Mac Leod, Tatiana C. O.
Martins, Luísa Margarida D. R. S.
Pombeiro, Armando J. L.
Palavras-chave: Asymmetric Reaction
Ruthenium(II) Arene Complexes
Boron-Pyrazole Chemistry
Human Ovarian-Cancer
PI-Acceptor Ligands
Crystal-Structure
Ferrocene Derivatives
Sulfinato Complexes
Transition-Metals
Anticancer Drugs
Data: 28-Mar-2011
Editora: Amer Chemical
Citação: PETTINARI, Claudio; MARCHETTI, Fabio; CERQUETELLA, Adele; PETTINARI, Riccardo; MONARI, Magda; MAC LEOD, Tatiana C. O.; MARTINS, Luísa M. D. R. S.; POMBEIRO, Armando J. L. - Coordination Chemistry of the (eta(6)-p-Cymene)ruthenium(II) Fragment with Bis-, Tris-, andTetrakis(pyrazol-1-yl)borate Ligands: Synthesis, Structural, Electrochemical, and CatalyticDiastereoselective Nitroaldol Reaction Studies. Organometallics. ISSN 0276-7333. Vol. 30, n.º 6 (2011) p. 1616-1626.
Resumo: Novel [Ru(eta(6)-p-cymene)(kappa(2)-L)X] and [Ru(eta(6)-p-cymene)(kappa(3)-L)]X center dot nH(2)O complexes (L = bis-, tris-, or tetrakis-pyrazolylborate; X = Cl, N-3, PF6, or CF3SO3) are prepared by treatment of [Ru(eta(6)-p-cymene)Cl-2](2) with poly-(pyrazolyl)borate derivatives [M(L)] (L in general; in detail L = Ph(2)Bp = diphenylbis-(pyrazol-1-yl)borate; L = Tp = hydrotris(pyrazol-1-yl)borate; L = pzTp = tetrakis(pyrazol-1-yl)borate; L = Tp(4Bo) = hydrotris(indazol-1-yl)borate, L = T-p4Bo,T-5Me = (5-methylindazol-1-yl)borate; L = Tp(Bn,4Ph) = hydrotris(3-benzyl-4-phenylpyrazol-1-yl)borate; M = Na, K, or TI) and characterized by analytical and spectral data (IR, ESIMS, H-1 and C-13 NMR). The structures of [Ru(eta(6)-p-cymene)(Ph(2)Bp)Cl] (1) and [Ru(eta(6)-p-cymene)(Tp)Cl] (3) have been established by single-crystal X-ray diffraction analysis. Electrochemical studies allowed comparing the electron-donor characters of Tp and related ligands and estimating the corresponding values of the Lever E-L ligand parameter. The complexes [Ru(eta(6)-p-cymene)-(kappa(2)-L)X] and [Ru(eta(6)-p-cymene)(kappa(3)-L)]X center dot nH(2)O act as catalyst precursors for the diastereoselective nitroaldol reaction of benzaldehyde and nitroethane to the corresponding beta-nitroalkanol (up to 82% yield, at room temperature) with diastereoselectivity toward the formation of the threo isomer.
Peer review: yes
URI: http://hdl.handle.net/10400.21/2124
ISSN: 0276-7333
Aparece nas colecções:ISEL - Eng. Quim. Biol. - Artigos

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Coordination Chemistry of the (eta(6)-p-Cymene)ruthenium(II) F.rep.pdf204,41 kBAdobe PDFVer/Abrir


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.