Ethyl‐Zinc(II)‐Cation Equivalents: Synthesis and Hydroamination Catalysis |
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| Authors: | T. O. Petersen E. Tausch Dr. J. Schaefer Dr. H. Scherer Prof.Dr. P. W. Roesky Prof.Dr. I. Krossing |
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| Affiliation: | 1. Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Albert‐Ludwigs‐Universit?t Freiburg, Albertstr. 21, 79104 Freiburg (Germany);2. Karlsruher Institut für Technologie (KIT), Institut für Anorganische Chemie, Engesserstr. 15, Geb. 30.45, 76131 Karlsruhe (Germany) |
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| Abstract: | Ion‐like ethylzinc(II) compounds with weakly coordinating aluminates [Al(ORF)4]? and [(RFO)3Al‐F‐Al(ORF)3]? (RF=C(CF3)3) were synthesized in a one‐pot reaction and fully characterized by single‐crystal X‐ray diffraction, NMR and vibrational spectroscopy, and by quantum chemical calculations. The catalytic activity of ion‐like Et‐Zn[Al(ORF)4] in intermolecular hydroamination and in the unusual double hydroamination of anilines and alkynes was investigated. Favorable performance was also found in comparison to the Et2Zn/ [PhNMe2H]+[B(C6F5)4]? system generated in situ at lower catalyst loadings of 2.5 mol %. |
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| Keywords: | alkynes aluminum hydroamination reactive cations weakly coordinating anions zinc |
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