Oswald Zimmer
Grünenthal GmbH
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Publication
Featured researches published by Oswald Zimmer.
Chemistry-an Asian Journal | 2008
Angelika Preetz; Wolfgang Baumann; Hans-Joachim Drexler; Christian Fischer; Jiangtao Sun; Anke Spannenberg; Oswald Zimmer; Wolfgang Hell; Detlef Heller
Various trinuclear rhodium complexes of the type [Rh(3)(PP)(3)(mu(3)-OH)(x)(mu(3)-OMe)(2-x)]BF(4) (where PP = Me-DuPhos, dipamp, dppp, dppe; different ligands and mu-bridging anions) are presented, which are formed upon addition of bases such as NEt(3) to solvate complexes [Rh(PP)(solvent)(2)]BF(4). They were extensively characterized by X-ray diffraction and NMR spectroscopy ((103)Rh, (31)P, (13)C, (1)H). Their in situ formation resulting from basic additives (NEt(3)) or basic prochiral olefins (without addition of another base) can cause deactivation of the asymmetric hydrogenation. This effect can be reversed by means of acidic additives.
Archive | 2007
Wolfgang Hell; Oswald Zimmer; Helmut Buschmann; Jörg Holenz; Stefan Gladow
Archive | 1996
Oswald Zimmer; Horst Dr. Böhlke; Stephan Wnendt; Cornelia Dr Geist-Rudolf; Kai Zwingenberger
Archive | 1995
Horst Dr. Böhlke; Michael Finkam; Oswald Zimmer; Johannes Schneider; Stephan Wnendt; Kai Zwingenberger
Archive | 2004
Oswald Zimmer; Michael Haurand; Klaus Schiene; Clemens Gillen; Johannes Schneider; Gregor Bahrenberg
Archive | 2005
Elmar Friderichs; Wolfgang Strassburger; Ulrich Jahnel; Derek Saunders; Hagen-Heinrich Hennies; Werner Englberger; Helmut Buschmann; Joerg Holenz; Oswald Zimmer
Archive | 1996
Oswald Zimmer; Hoerst Boehlke; Stephan Wnendt; Cornelia Geist; Kai Zwingenberger
Archive | 1995
Horst Dr Boehlke; Michael Finkam; Oswald Zimmer; Johannes Schneider; Stephan Wnendt; Kai Zwingenberger
Archive | 2002
Tieno Germann; Stefanie Frosch; Erik Wade; Helmut Buschmann; Oswald Zimmer
Archive | 1992
Oswald Zimmer; Werner Vollenberg; Johannes Schneider
