Polymer-Supported Palladium(II) Carbene Complexes: Catalytic Activity, Recyclability, and Selectivity in C−H Acetoxylation of Arenes

2017 ◽  
Vol 23 (35) ◽  
pp. 8457-8465 ◽  
Author(s):  
Maitham H. Majeed ◽  
Payam Shayesteh ◽  
L. Reine Wallenberg ◽  
Axel R. Persson ◽  
Niclas Johansson ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Carbene Complexes ◽  
Supported Palladium ◽  
Polymer Supported

scholarly journals Polystyrene-Supported Acyclic Diaminocarbene Palladium Complexes in Sonogashira Cross-Coupling: Stability vs. Catalytic Activity

Catalysts ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 141 ◽  
Author(s):  
Vladimir Mikhaylov ◽  
Viktor Sorokoumov ◽  
Denis Liakhov ◽  
Alexander Tskhovrebov ◽  
Irina Balova
Keyword(s):  
Catalytic Activity ◽  
High Activity ◽  
Cross Coupling ◽  
Palladium Complexes ◽  
Lower Activity ◽  
Coupling Conditions ◽  
Acyclic Diaminocarbene ◽  
Supported Palladium ◽  
Polymer Supported

Two types of immobilized on the amino-functionalized polystyrene-supported acyclic diaminocarbene palladium complexes (ADC-PdII) are investigated under Sonogashira cross-coupling conditions. Depending on substituents in the diaminocarbene fragment immobilized ADC-PdII, systems are found to have different catalytic activity and stability regarding Pd-leaching. PdII-diaminocarbenes possessing protons at both nitrogen atoms smoothly decompose into Pd0-containing species providing a catalytic “cocktail system” with high activity and ability to reuse within nine runs. Polymer-supported palladium (II) complex bearing NBn–Ccarbene–NH-moiety exhibits greater stability while noticeably lower activity under Sonogashira cross-coupling. Four molecular ADC-PdII complexes are also synthesized and investigated with the aim of confirming proposed base-promoted pathway of ADC-PdII conversion through carbodiimide into an active Pd0 forms.

Relationships between physico-chemical properties and catalytic activity of polymer-supported palladium catalysts.

1995 ◽  
Vol 124 (2) ◽  
pp. 355-365 ◽  
Author(s):  
Andrea Biffis ◽  
Benedetto Corain ◽  
Zuzana Cvengrosˇová ◽  
Milan Hronec ◽  
Karel Jerˇábek ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Palladium Catalysts ◽  
Chemical Properties ◽  
Supported Palladium Catalysts ◽  
Physico Chemical ◽  
Supported Palladium ◽  
Polymer Supported

Synthesis of ruthenium N-heterocyclic carbene complexes and their catalytic activity for β-alkylation of tertiary cyclic amines

2015 ◽  
Vol 799-800 ◽  
pp. 311-315 ◽  
Author(s):  
İsmail Özdemir ◽  
Serpil Demir Düşünceli ◽  
Nazan Kaloğlu ◽  
Mathieu Achard ◽  
Christian Bruneau
Keyword(s):  
Catalytic Activity ◽  
Carbene Complexes ◽  
Cyclic Amines
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