Synapse
⌘+K
Synapse
PulseExploreClubsResearchersJournals
Instagram
HomeClubsExplore
July 4, 2002The Journal of Organic Chemistry

Air Stable, Sterically Hindered Ferrocenyl Dialkylphosphines for Palladium-Catalyzed C−C, C−N, and C−O Bond-Forming Cross-Couplings

View Full Paper
Ask AI
Bookmark
Share

Authors

NKNoriyasu KataokaSuzuki (Japan)QSQuinetta D. ShelbyDePaul UniversityJSJames P. StambuliAbbVie (United States)

Discussion

Loading...

Member takes

Overview

Synthetic investigation demonstrates versatile palladium-catalyzed cross-couplings using air-stable ferrocenyl phosphines, highlighting a general route for carbon-heteroatom bond formation.

Key Points

  • To synthesize pentaphenylferrocenyl di-tert-butylphosphine and evaluate its performance and stability in palladium-catalyzed carbon-carbon, carbon-nitrogen, and carbon-oxygen bond-forming reactions.
  • Synthesized pentaphenylferrocenyl di-tert-butylphosphine in high yield via a two-step synthetic sequence.
  • Evaluated catalytic cross-coupling efficiency across aminations, Suzuki couplings, and aryl ether formations using electron-rich and electron-poor aryl bromides and chlorides.
  • Tested reaction tolerance with primary and secondary amines, terminal alkylboronic acids without toxic bases, and determined aerobic stability in solid and solution states.
  • Observed catalyst turnovers of roughly 1000 for aryl halide aminations involving unactivated aryl bromides or chlorides.
  • Achieved successful couplings of aryl halides with cyclic or acyclic secondary amines, primary amines, and terminal alkylboronic acids under mild conditions.
  • Demonstrated air stability of both the free ligand and its palladium(0) complexes in the solid state, alongside slow oxygen reactivity in solution.

Cite This Study

Kataoka et al. (2002) studied this question.

synapsesocial.com/papers/6a1078cbe1a472cb5efcf7e6https://doi.org/10.1021/jo025732j
View Full Paper
Ask AI
Bookmark
Share

Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Unusual in Situ Ligand Modification to Generate a Catalyst for Room Temperature Aromatic C−O Bond Formation2000 · 387 citations
  2. 2Palladium Alkoxides:  Potential Intermediacy in Catalytic Amination, Reductive Elimination of Ethers, and Catalytic Etheration. Comments on Alcohol Elimination from Ir(III)1996 · 318 citations
  3. 3Room-Temperature Palladium-Catalyzed Amination of Aryl Bromides and Chlorides and Extended Scope of Aromatic C−N Bond Formation with a Commercial Ligand1999 · 769 citations
  4. 4A Novel Easily Accessible Chiral Ferrocenyldiphosphine for Highly Enantioselective Hydrogenation, Allylic Alkylation, and Hydroboration Reactions1994 · 675 citations
  5. 5Transformations of Chloroarenes, Catalyzed by Transition-Metal Complexes1994 · 677 citations