Access to β‐Ketonitriles through Nickel‐Catalyzed Carbonylative Coupling of α‐Bromonitriles with Alkylzinc Reagents
作者:Aske S. Donslund、Karoline T. Neumann、Nicklas P. Corneliussen、Ebbe K. Grove、Domenique Herbstritt、Kim Daasbjerg、Troels Skrydstrup
DOI:10.1002/chem.201902206
日期:2019.7.25
Herein, we report a nickel‐catalyzed carbonylative coupling of α‐bromonitriles and alkylzinc reagents with near stoichiometric carbon monoxide to give β‐ketonitriles in good yields. The reaction is catalyzed by a readily available and stable nickel(II) pincercomplex. The developed protocol tolerates substrates bearing a variety of functional groups, which would be problematic or incompatible with
Remarkably simple IrIII catalysts enable the isomerization of primary and sec‐allylicalcohols under very mild reaction conditions. X‐ray absorption spectroscopy (XAS) and mass spectrometry (MS) studies indicate that the catalysts, with the general formula [Cp*IrIII], require a halide ligand for catalytic activity, but no additives or additional ligands are needed.
非常简单的Ir III催化剂可在非常温和的反应条件下实现伯醇和仲烯丙基醇的异构化。X射线吸收光谱(XAS)和质谱(MS)研究表明,通式为[Cp * Ir III ]的催化剂需要卤化物配体才能发挥催化活性,但不需要添加剂或其他配体。