The Bjerrum length is approached in a lowpolaritysolvent by encapsulating, both, a borate anion and a phosphonium cation in a rigid lipophilic dendrimer shell. In addition the cation size is varied by 34-fold. We thus obtain superweak ions with potential applications in catalytic processes.
Stille-type aryl–aryl cross-coupling catalysis using triarylphosphine ligands with electron-rich Fe(ii)-alkynyl substituents
作者:Guillaume Grelaud、Ayham Tohmé、Gilles Argouarch、Thierry Roisnel、Frédéric Paul
DOI:10.1039/c1nj20480g
日期:——
The synthesis of four new phosphane ligands featuring electron-rich Fe(II) â(η2-dppe)(η5-C5Me5)FeCC-â substituents in para and meta position(s) on the aryl rings (1â4) is reported along with those of the corresponding PdCl2(PAr3)2 precatalysts (7â10). These precatalysts have then been tested in a Stille-type arylâaryl cross coupling reaction. It is shown that these new ligands survive the reaction conditions and perform at least as well as the classic triphenylphosphine ligand for this transformation.
Polycalixarene materials, methods of making same, and uses thereof
申请人:New York University in Abu Dhabi Corporation
公开号:US11027257B2
公开(公告)日:2021-06-08
Provided are porous polymeric materials, methods of making same, and methods of using same. The porous polymeric materials include crosslinked calixarene moieties. The porous polymeric materials can be added to a sample and absorb/adsorb pollutants present in the sample. The absorbed/adsorbed pollutant can further be isolated from the porous polymeric material. The porous polymeric materials can be recycled.
Synthesis of new triphenylphosphines with pending ethynyl substituents
作者:Guillaume Grelaud、Gilles Argouarch、Frédéric Paul
DOI:10.1016/j.tetlet.2010.05.055
日期:2010.7
The straightforward isolation and characterization of new triphenylphosphines possessing a pendent ethynyl substituent on one or several peripheral aryl ring(s) are reported. The synthesis of this family of compounds is achieved by retro-Favorsky reactions from the corresponding propargylic alcohol derivatives, themselves obtained following a classic Sonogashira-type coupling between the ad hoc bromophenyl phosphines and 2-methylbut-3-yn-2-ol. (C) 2010 Elsevier Ltd. All rights reserved.
Triarylphosphine Ligands with Pendant Electron-Rich “[Fe(κ<sup>2</sup>-dppe)(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)(C≡C)]–” Substituents
作者:Ayham Tohmé、Guillaume Grelaud、Gilles Argouarch、Thierry Roisnel、Arnaud Bondon、Frédéric Paul
DOI:10.1021/ic4011828
日期:2013.8.5
The synthesis of four triaylphosphine ligands featuring electron-rich Fe(II) "Fe(kappa(2)-dppe)(eta(5)-C5Me5)C C-" pendant substituents in para and meta position(s) (1-4) is reported along with that of their corresponding radical cations (1- 2[PF6] or 3-4[PF6](3)). These triarylphosphines possessing redox-active organometallic substituents constitute a new class of phosphorus-based metallo-ligands. In contrast to many related ferrocenylphosphines, these metallo-ligands are stable and isolable in two redox-states. Their steric and electronic properties are also briefly discussed.