N‐(Sulfonio)Sulfilimine Reagents: Non‐Oxidizing Sources of Electrophilic Nitrogen Atom for Skeletal Editing
作者:Tobias Heilmann、Juan M. Lopez‐Soria、Johannes Ulbrich、Johannes Kircher、Zhen Li、Brigitte Worbs、Christopher Golz、Ricardo A. Mata、Manuel Alcarazo
DOI:10.1002/anie.202403826
日期:2024.6.17
Under rhodium catalysis N-sulfonio(sulfilimines) act as sulfonitrene precursors. Reaction of such species with indenes presumably delivers N-sulfonio aziridines, which evolve to isoquinolines via electrocyclic ring expansion. Contrarily, 1-arycyclobutenes are transformed into 1-cyano-1-arylcyclopropanes via ringcontraction.
Earth-Abundant Metal-Catalyzed Cross-Coupling Reactions of 1-Bromocyclobut-1-enes with Grignard Reagents
作者:Janine Cossy、Tomohiro Yasukawa、Katja S. Håheim、Julien Boutet、Pierre Gilles、Juliette Martin
DOI:10.1055/a-2347-1143
日期:2025.3
Cross-coupling reactions have been developed between C2-substituted 1-bromocyclobut-1-enes and Grignard reagents using two effective catalysts, e.g., Fe(acac)3 and Ni(acac)2. The iron catalyst works in THF but requires NMP as the co-solvent, with the advantage of achieving cross-coupling reactions with alkyl Grignard reagents. The nickel catalyst was able to promote the reactions in THF without any
使用两种有效的催化剂,例如 Fe(acac) 3 和 Ni(acac) 2
Preparation of Aryl Cyclobutenes Under Mild and Neutral Conditions
作者:H. Juteau、Y. Gareau
DOI:10.1080/00397919808004932
日期:1998.10
Aryl cyclobutyl acetates were converted to the corresponding aryl cyclobutenes with lithium bromide in good yields (50-97%) and in high purity.
Cobalt-Catalyzed Nitrogen Atom Insertion in Arylcycloalkenes