scholarly journals Rational ligand choice extends the SABRE substrate scope

2020 ◽  
Vol 56 (65) ◽  
pp. 9336-9339 ◽  
Author(s):  
Johannes F. P. Colell ◽  
Angus W. J. Logan ◽  
Zijian Zhou ◽  
Jacob R. Lindale ◽  
Raul Laasner ◽  
...  
Keyword(s):  
Signal Amplification ◽  
Chelating Ligands ◽  
Sterically Hindered

Here we report on chelating ligands for Signal Amplification By Reversible Exchange (SABRE) catalysts that permit hyperpolarisation on otherwise sterically hindered substrates.

Efficiently luminescent mononuclear copper iodide complexes with sterically hindered iminephosphine chelating ligands

2021 ◽  
Author(s):  
Bin Zhang ◽  
Jie Zhang ◽  
Ahui Sun ◽  
Chunmei Liu ◽  
Mengsi Gu ◽  
...  
Keyword(s):  
Solid State ◽  
Chelating Ligands ◽  
Copper Iodide ◽  
Intense Emission ◽  
Sterically Hindered ◽  
Uv Excitation

Phosphorescent four-coordinate Cu(I) complexes (1-3) of type [CuI(PPh3)(N^P)], N^P = 4-(diphenylphosphanyl)-1,2-diphenylbenzimidazole derivatives, have been synthesized and characterized. Under UV excitation, the titled complexes in the solid-state exhibit intense emission with...

A study of complexes with chelating ligands containing sterically hindered phenols

1982 ◽  
Vol 22 (6) ◽  
pp. 902-906
Author(s):  
A. A. Medzhidov ◽  
V. T. Kasumov ◽  
M. K. Guseinova ◽  
I. R. Amiraslanov
Keyword(s):  
Sterically Hindered Phenols ◽  
Chelating Ligands ◽  
Hindered Phenols ◽  
Sterically Hindered

A study of complexes with chelating ligands containing sterically hindered phenols

1981 ◽  
Vol 22 (1) ◽  
pp. 67-73 ◽  
Author(s):  
V. T. Kasumov ◽  
M. K. Guseinova ◽  
A. A. Medzhidov ◽  
Kh. S. Mamedov
Keyword(s):  
Sterically Hindered Phenols ◽  
Chelating Ligands ◽  
Hindered Phenols ◽  
Sterically Hindered

Nickel-Catalyzed Regioselective Hydroalkylation of 1,3-Dienes with Hydrazones

2019 ◽  
Author(s):  
Leiyang Lv ◽  
Dianhu Zhu ◽  
Zihang Qiu ◽  
Jianbin Li ◽  
Chao-Jun Li
Keyword(s):  
Catalytic Method ◽  
Unsaturated Hydrocarbons ◽  
Carbon Nucleophiles ◽  
Aryl Aldehydes ◽  
Aldehydes And Ketones ◽  
Sterically Hindered

Hydroalkylation of unsaturated hydrocarbons with unstablized carbon nucleophiles is difficult and remains a major challenge. The disclosed examples so far mainly focused on the involvement of heteroatom and/or stabilized carbon nucleophiles as efficient reaction partners. Reported here is an unprecedented regioselective nickel-catalyzed hydroalkylation of 1,3-dienes with hydrazones, generated in situ from abundant aryl aldehydes and ketones and acted as both the sources of unstabilized carbanions and hydride. With this strategy, both terminal and sterically hindered internal dienes are hydroalkylated efficiently in a highly selective manner, thus providing a novel and reliable catalytic method to construct challenging C(sp3)-C(sp3) bonds.

Synthesis of Conjugated Triynes via Alkyne Metathesis

2019 ◽  
Author(s):  
Idriss Curbet ◽  
Sophie Colombel-Rouen ◽  
Romane Manguin ◽  
Anthony Clermont ◽  
Alexandre Quelhas ◽  
...  
Keyword(s):  
Steric Hindrance ◽  
High Selectivity ◽  
Alkyne Metathesis ◽  
Cross Metathesis ◽  
Synthetic Strategy ◽  
Sterically Hindered ◽  
Site Selective

<div> <div> <div> <div> <p>The synthesis of conjugated triynes by molybdenum-catalyzed alkyne metathesis is reported. Strategic to the success of this approach is the utilization of sterically-hindered diynes that allowed for the site- selective alkyne metathesis to produce the desired con- jugated triyne products. The steric hindrance of alkyne moiety was found to be crucial in preventing the for- mation of diyne byproducts. This novel synthetic strategy was amenable to self- and cross-metathesis providing straightforward access to the corresponding symmetrical and dissymmetrical triynes with high selectivity. </p> </div> </div> </div> </div>

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