Aminotroponate Zinc Complexes as Catalysts for the Intramolecular Hydroamination of Alkenes and Alkynes

The dimeric complexes 2-(isopropylamino)troponate zinc methyl and ethyl [(iPrAT)Zn-R]2 (R = Me (2a), Et (2b)) were synthesized by reaction of (iPrAT)H with dimethyl and diethyl zinc, respectively, in toluene at low temperature. Reacting (iPrAT)H with dimethyl zinc at elevated temperature resulted in...

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Bibliographic Details
Published in:Organometallics 2006-07, Vol.25 (15), p.3730-3734
Main Authors: Meyer, Nils, Löhnwitz, Karolin, Zulys, Agustino, Roesky, Peter W, Dochnahl, Maximilian, Blechert, Siegfried
Format: Article
Language:English
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Summary:The dimeric complexes 2-(isopropylamino)troponate zinc methyl and ethyl [(iPrAT)Zn-R]2 (R = Me (2a), Et (2b)) were synthesized by reaction of (iPrAT)H with dimethyl and diethyl zinc, respectively, in toluene at low temperature. Reacting (iPrAT)H with dimethyl zinc at elevated temperature resulted in the double-substituted complex [(iPrAT)2Zn] (3). Compounds 2a,b, which were investigated by single-crystal X-ray diffraction, are dimeric in the solid state. The metal centers are bridged asymmetrically by two (μ)-oxygen atoms; thus a flat Zn−O−Zn‘−O‘ plane is observed. Compounds 2a,b were used as the catalyst in the intramolecular hydroamination reaction of nonactivated terminal aminoolefins and one aminoalkyne. Good catalytic activities at elevated temperature were observed.
ISSN:0276-7333
1520-6041
DOI:10.1021/om060369i