573701-24-3Relevant academic research and scientific papers
Tunable iridium catalyst designs with bidentate N-heterocyclic carbene ligands for SABRE hyperpolarization of sterically hindered substrates
Pham, Pierce,Hilty, Christian
, p. 15466 - 15469 (2020)
A series of bidentate N-heterocyclic carbene (NHC) iridium catalysts, [Ir(κC,N-NHC)H2L2]BPh4, are proposed for SABRE hyperpolarization. The steric and electronic properties of the NHCs are used to tune substrate affinity and thereby SABRE efficiency. The sterically hindered substrates 2,4-diaminopyrimidine and trimethoprim yielded maximum proton NMR signal enhancements of ～300-fold and ～150-fold, respectively.
Synthesis of novel heteroditopic carbene-pyridine palladium(II) chloro vinyl complexes. Comparative reactivity of different palladium vinyl derivatives toward transmetalation with alkynyl stannane
Canovese, Luciano,Visentin, Fabiano,Levi, Carlo,Santo, Claudio
, p. 74 - 77 (2013)
DeC-activated alkynes such as di-t-butyl-ethyne-dicarboxylate (DTA) or the more reactive dimethyl-ethyne-dicarboxylate (DMA) do not react with palladium(II) chloro methyl complexes bearing heteroditopic carbene-pyridine (C-N) as spectator ligands to give the corresponding vinyl derivatives. In order to prepare this type of derivatives we resorted to a dedicated synthetic protocol based on the displacement of labile pyridine-thioether ligands of vinyl palladium pyridine-thioeter species by the carbene-pyridine ligand of carbene-pyridine silver chloride complexes. However, the novel carbene-pyridine vinyl complexes obtained by such synthetic protocol, if compared with other palladium vinyl species with similar steric requirements, display a markedly reduced reactivity toward transmetalation with ethynyl-stannane.
Cuprophilic interactions in highly luminescent dicopper(i)-NHC-picolyl complexes-fast phosphorescence or TADF?
Nitsch, J?rn,Lacemon, Frederick,Lorbach, Andreas,Eichhorn, Antonius,Cisnetti, Federico,Steffen, Andreas
, p. 2932 - 2935 (2016)
This case study on a series of monomeric, dimeric and polymeric CuI chlorido NHC-picolyl complexes shows that cuprophilic interactions can ensure strong spin-orbit coupling for fast (reverse)intersystem-crossing T1 虠 S1 an
Palladium complexes with picolyl functionalized N-heterocyclic carbene ligands and their application in the Mizoroki-Heck reaction
Cao, Changsheng,Sun, Rui,Chen, Qian,Lv, Lanlan,Shi, Yanhui,Pang, Guangsheng
, p. 351 - 358 (2013/07/05)
A series of Pd complexes of picoline-functionalized N-heterocyclic carbenes with different substituents were synthesized. The molecular structures of selected complexes were determined by X-ray diffraction studies, showing a pseudo-square-planar structure with a Pd center surrounded by carbene, pyridine, and two chloride ligands. The influence of the different substituents on the structure and reactivity of the complexes has been studied. The catalytic properties of the complexes were investigated in the Mizoroki-Heck reaction for cross-coupling of bromobenzene with a variety of aryl halides. Their performances varied in these reactions but showed good product regioselectivities.
