Synthesis of new triphenylphosphines with pending ethynyl substituents
摘要:
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.