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Identification of a Highly Efficient Alkylated Pincer Thioimido–Palladium(II) Complex as the Active Catalyst in Negishi Coupling
Authors:Jing Liu Dr.  Haibo Wang  Heng Zhang Dr.  Xiaojun Wu  Hua Zhang  Yi Deng  Zhen Yang Prof.  Aiwen Lei Prof.
Affiliation:1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, 430072 (China), Fax: (+86)?27‐6875‐4067;2. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (China), Fax: (+86)?10‐6275‐9105
Abstract:Pd II ate complex : A novel alkylated pincer thioimido–Pd complex generated from a catalyst precursor and basic organometallic reagents (RM) was observed by in situ IR, 1H NMR, and 13C NMR spectroscopies for the first time and proved to be the active catalyst in stoichiometric and catalytic reactions of aryl iodides with RM (see scheme). The catalyst, as an electron‐rich PdII species, promoted the Negishi coupling of aryl iodides and alkylzinc reagents with high efficiency, even at low temperatures (0 or ?20 °C).
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Keywords:ate complexes  coupling reactions  homogeneous catalysis  palladium  reaction mechanisms
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