N-Heterocyclic carbene adducts of cyclopalladated ferrocenylpyridine: Synthesis, structural characterization and reusable catalytic system for Suzuki and amination of aryl chlorides in poly(ethylene glycol-400)

2012 ◽  
Vol 386 ◽  
pp. 22-26 ◽  
Author(s):  
Chen Xu ◽  
Hong-Mei Li ◽  
Hu Liu ◽  
Zhi-Qiang Zhang ◽  
Zhi-Qiang Wang ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Catalytic System ◽  
Structural Characterization ◽  
Poly Ethylene Glycol ◽  
Aryl Chlorides ◽  
Poly Ethylene

Recyclable Pd2dba3/XPhos/PEG-2000 System for Efficient Boryl­ation of Aryl Chlorides: Practical Access to Aryl Boronates

Synthesis ◽  
2021 ◽  
Author(s):  
Mingzhong Cai ◽  
Bin Huang ◽  
Chengkai Luo ◽  
Caifeng Xu
Keyword(s):  
Ethylene Glycol ◽  
Functional Group ◽  
Catalytic Efficiency ◽  
Poly Ethylene Glycol ◽  
Efficient Catalyst ◽  
Aryl Chlorides ◽  
Reaction Proceeds ◽  
Simple Extraction ◽  
Poly Ethylene

AbstractPd2dba3/XPhos in poly(ethylene glycol) (PEG-2000) is shown to be a highly stable and efficient catalyst for the borylation of aryl chlorides with bis(pinacolato)diboron. The borylation reaction proceeds smoothly at 110 °C, delivering a wide variety of aryl boronates in good to excellent yields with high functional group tolerance. The crude products were easily isolated via simple extraction of the reaction mixture with cyclohexane. Moreover, both expensive Pd2dba3 and XPhos in PEG-2000 system could be readily recycled and reused more than six times without loss of catalytic efficiency.

Ligand-Free and Recyclable Palladium(II) Acetate Catalyzes the Decarboxylative Cross-Coupling of Alkynyl Carboxylic Acids with Arylboronic Acids in Aqueous PEG-400

Synlett ◽  
2020 ◽  
Vol 31 (08) ◽  
pp. 793-796
Author(s):  
Bo-Xiao Tang ◽  
Hong Zou ◽  
Bao-Xing Xie ◽  
Hai-Qing Zhong ◽  
Yi-Hua Wang ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Catalytic System ◽  
Reaction Medium ◽  
Cross Coupling ◽  
Poly Ethylene Glycol ◽  
Arylboronic Acids ◽  
Peg 400 ◽  
Ligand Free ◽  
Internal Alkynes ◽  
Poly Ethylene

A novel and ligand-free method was developed for the decarboxylative cross-coupling of alkynylcarboxylic acids with arylboronic acids. By using an environmentally friendly H2O–poly(ethylene glycol) (PEG-400) system as the reaction medium, a series of internal alkynes were synthesized in good yields and with remarkable selectivity. The Pd(OAc)2–H2O–PEG-400 catalytic system could be used for up to three cycles without any loss of activity, demonstrating the robustness of the approach.

N-Heterocyclic carbene ligands bearing poly(ethylene glycol) chains: effect of the chain length on palladium-catalyzed coupling reactions employing aryl chlorides

2015 ◽  
Vol 51 (98) ◽  
pp. 17382-17385 ◽  
Author(s):  
Tetsuaki Fujihara ◽  
Takahiro Yoshikawa ◽  
Motoi Satou ◽  
Hidetoshi Ohta ◽  
Jun Terao ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Chain Length ◽  
Heterocyclic Carbenes ◽  
Coupling Reactions ◽  
Poly Ethylene Glycol ◽  
Carbene Ligands ◽  
Aryl Chlorides ◽  
Palladium Catalyzed ◽  
Poly Ethylene

N-Heterocyclic carbenes bearing poly(ethylene glycol) chains of different lengths have been employed as ligands in palladium-catalyzed coupling reactions of aryl chlorides.

Iodide-conducting polymer electrolytes based on poly-ethylene glycol and MgI2: Synthesis and structural characterization

2011 ◽  
Vol 57 ◽  
pp. 112-122 ◽  
Author(s):  
Michele Vittadello ◽  
David I. Waxman ◽  
Paul J. Sideris ◽  
Zhehong Gan ◽  
Keti Vezzù ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Conducting Polymer ◽  
Structural Characterization ◽  
Polymer Electrolytes ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Poly(ethylene glycol) based bis-diol as a functional medium for highly efficient conversion of urea and methanol to dimethyl carbonate

2016 ◽  
Vol 18 (3) ◽  
pp. 798-801 ◽  
Author(s):  
Zhaofu Zhang ◽  
Lujun Zhang ◽  
Congyi Wu ◽  
Qingli Qian ◽  
Qinggong Zhu ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Conventional Method ◽  
Catalytic System ◽  
Dimethyl Carbonate ◽  
Poly Ethylene Glycol ◽  
Efficient Conversion ◽  
Highly Efficient ◽  
Equilibrium Yield ◽  
Poly Ethylene

Poly(ethylene glycol) based bis-diol/ZnO is an excellent catalytic system for the reaction of urea and methanol to produce DMC. The equilibrium yield of DMC in the reaction can be ten times higher than that of the conventional method.

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