The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Tris(triphenylphosphine)chlororhodium( cas:14694-95-2 ) is researched.Electric Literature of C54H45ClP3Rh.Zhang, Yu; Woods, Toby J.; Rauchfuss, Thomas B. published the article 《Application of Hemilabile Ligands to “”At-Metal Switching”” Hydrogenation Catalysis》 about this compound( cas:14694-95-2 ) in Organometallics. Keywords: Rh and Ir diphenylphosphinoanisole complexes; crystal structure rhodium iridium phenylphosphinoanisole hydride chloride complex; mol structure rhodium iridium phenylphosphinoanisole hydride chloride complex. Let’s learn more about this compound (cas:14694-95-2).
The paper describes the development of switchable catalysts, i.e. precatalysts that are activated by a reagent and the resulting active catalyst could be shut off with a 2nd reagent. A concept is introduced, involving oxidative addition of Rh(I) catalyst with trityl chloride and reductive activation of dichlororhodium(III) phosphines with cobaltocene. Part 1 of the paper describes the development of the catalytic platforms, which are 2-diphenylphosphinoanisole (PPh2An) complexes of Rh and Ir. Part 2 describes the proof-of-concept as applied to the hydrogenation of styrene, including mechanistic studies. The Rh catalysts were developed from Rh2Cl2(C2H4)4, which was converted to Rh2Cl2(C2H4)2(κ1-PPh2An)2 and RhCl(κ1-PPh2An)(κ2-PPh2An). This charge-neutral chloride is a precursor to [Rh(κ2-PPh2An)2]BArF4 and the precatalyst [RhCl2(κ2-PPh2An)2]BArF4. The Ir catalysts were developed from Ir2Cl2(coe)4, which reacts with PPh2An to give IrClH(κ2-PPh2C6H4OCH2)(κ2-PPh2An). This cyclometalated complex behaves equivalently to IrCl(PPh2An)2. IrClH(κ2-PPh2C6H4OCH2)(κ2-PPh2An) readily react with H2 to form IrClH2(κ1-PPh2An)(κ2-PPh2An), which is a viable precursor to the off state catalyst [IrCl2(κ2-PPh2An)2]BArF4. In part 2, the authors demonstrated that [MCl2(κ2-PPh2An)2]BArF4 (M = Rh, Ir) are inactive for styrene hydrogenation in contrast with the other M-PAn compounds Especially in the case of Rh, the hydrogenation is well controlled with the addition of selected reagents. Details of OA/RA are elucidated using cyclic voltammetry and stochiometric chem. redox experiments
As far as I know, this compound(14694-95-2)Electric Literature of C54H45ClP3Rh can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.
Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate