877129-18-5Relevant academic research and scientific papers
Coordination of Nickel(II) by 3-(2-(Diphenylphosphanyl)phenyl)-1H-pyrazole
Schmidt, Alexandra D.,Sun, Yu,Thiel, Werner R.
, p. 2093 - 2101 (2015)
Starting from easily accessible 3-[2-(diphenylphosphanyl)phenyl]-1H-pyrazole a series of four- and five-coordinate diamagnetic nickel(II) complexes were synthesized and structurally characterized. The resulting complexes show dynamic NMR spectra reflecting a high degree of flexibility in the ligand backbone. Protonation and deprotonation of the pyrazole moiety allows interconversion of the nickel(II) complexes.
Bimetallic Cu/Pd Catalysts with Bridging Aminopyrimidinyl Phosphines for Decarboxylative Cross-Coupling Reactions at Moderate Temperature
Hackenberger, Dagmar,Song, Bingrui,Grünberg, Matthias F.,Farsadpour, Saeid,Menges, Fabian,Kelm, Harald,Gro?, Cedric,Wolff, Timm,Niedner-Schatteburg, Gereon,Thiel, Werner R.,Goo?en, Lukas J.
, p. 3579 - 3588 (2015/11/10)
A bimetallic catalyst system is presented that enables the decarboxylative cross-coupling of triflates with carboxylate salts at only 100 °C, which is 70 °C lower than with previous Cu/Pd-based systems. The new protocol allows the coupling of a broad range of aryl triflates with various substituted 2-nitrobenzoates in good to excellent yields. The key feature of the catalyst system is a bidentate P,N-ligand designed to bridge the Pd and Cu centres and thereby facilitating the rate-determining transmetalation step. Mass spectrometry (ESI-MS) studies support the ability of the aminopyrimidinyl phosphine to simultaneously coordinate copper and palladium.
