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A Comparative Study Of Cationic Copper(I) Reagents Supported By Bipodal Tetramethylguanidinyl-Containing Ligands As Nitrene-Transfer Catalysts
ACS Omega
  • Suraj Kumar Sahoo
  • Brent Harfmann
  • Himanshu Bhatia
  • Harish Singh
  • Srikanth Balijapelly
  • Amitava Choudhury, Missouri University of Science and Technology
  • Pericles Stavropoulos, Missouri University of Science and Technology
Abstract

The Bipodal Compounds [(TMG2biphenN-R)CuI-NCMe](PF6) (R = Me, Ar (4-CF3Ph-)) And [(TMG2biphenN-Me)CuI-I] Have Been Synthesized With Ligands That Feature A Diarylmethyl- And Triaryl-Amine Framework And Superbasic Tetramethylguanidinyl Residues (TMG). The Cationic Cu(I) Sites Mediate Catalytic Nitrene-Transfer Reactions Between The Imidoiodinane PhI = NTs (Ts = Tosyl) And A Panel Of Styrenes In MeCN, To Afford Aziridines, Demonstrating Comparable Reactivity Profiles. The Copper Reagents Have Been Further Explored To Execute C-H Amination Reactions With A Variety Of Aliphatic And Aromatic Hydrocarbons And Two Distinct Nitrene Sources PhI = NTs And PhI = NTces (Tces = 2,2,2-Trichloroethylsulfamate) In Benzene/HFIP (10:2 V/v). Good Yields Have Been Obtained For Sec-Benzylic And Tert-C-H Bonds Of Various Substrates, Especially With The More Electron-Deficient Catalyst [(TMG2biphenN-Ar)CuI-NCMe](PF6). In Conjunction With Earlier Studies, The Order Of Reactivity Of These Bipodal Cationic Reagents As A Function Of The Metal Employed Is Established As Cu > Fe > Co ≥ Mn. However, As Opposed To The Base-Metal Analogues, The Bipodal Cu Reagents Are Less Reactive Than A Similar Tripodal Cu Catalyst. The Observed Fluorophilicity Of The Bipodal Cu Compounds May Provide A Deactivation Pathway.

Department(s)
Chemistry
Publication Status
Open Access
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 American Chemical Society, All rights reserved.
Creative Commons Licensing
Creative Commons Attribution 4.0
Publication Date
1-1-2024
Publication Date
01 Jan 2024
Disciplines
Citation Information
Suraj Kumar Sahoo, Brent Harfmann, Himanshu Bhatia, Harish Singh, et al.. "A Comparative Study Of Cationic Copper(I) Reagents Supported By Bipodal Tetramethylguanidinyl-Containing Ligands As Nitrene-Transfer Catalysts" ACS Omega (2024) ISSN: 2470-1343
Available at: http://works.bepress.com/pericles-stavropoulos/49/