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.

Copper-catalyzed carbonylative Suzuki coupling of aryl iodides with arylboronic acids under ambient pressure of carbon monoxide

RSC Advances ◽  
2014 ◽  
Vol 4 (83) ◽  
pp. 44312-44316 ◽  
Author(s):  
Laijin Cheng ◽  
Yanzhen Zhong ◽  
Zhuchao Ni ◽  
Hongyan Du ◽  
Fengli Jin ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Ethylene Glycol ◽  
Ambient Pressure ◽  
Cross Coupling ◽  
Suzuki Coupling ◽  
Poly Ethylene Glycol ◽  
Arylboronic Acids ◽  
Aryl Iodides ◽  
Poly Ethylene

An efficient and ligandless nanocopper-catalyzed carbonylative cross-coupling of aryl iodides with arylboronic acids at ambient CO pressure in poly(ethylene glycol), has been developed.

scholarly journals Poly(ethylene glycol) Supported Metal Nitrates as Well-Organized Reagents for Hunsdiecker Conversion of α,β-Unsaturated Acids to β-Nitrostyrenes under Solvent and Acid-Free Conditions

2019 ◽  
Vol 31 (8) ◽  
pp. 1798-1800
Author(s):  
K. Ramesh ◽  
S. Shylaja ◽  
S. Ramgopal ◽  
A. Sambashiva Rao ◽  
K.C. Rajanna
Keyword(s):  
Ethylene Glycol ◽  
Solvent Free ◽  
The Other ◽  
Ferric Nitrate ◽  
Poly Ethylene Glycol ◽  
Peg 400 ◽  
Metal Nitrates ◽  
Solvent Free Conditions ◽  
Poly Ethylene ◽  
Supported Metal

Poly(ethylene glycol) (PEG) supported metal nitrates such as ferric nitrate and manganese nitrate were accomplished as well-organized reagents for Hunsdiecker conversion of α,β-unsaturated acids to β-nitrostyrenes under acid-free and solvent free conditions using grind-stone technique. However, in the case of unsaturated aliphatic acids, nitro alkene derivatives were obtained as products. PEG-400 was found the best among the other PEGs (PEG-200,300, 400, 600, 3000 and 6000) used in this protocol.

An Efficient and Green Procedure for the Preparation of 2-{2-[N′-(2-Hydroxybenzylidene)hydrazino]thiazol-4-yl}phenols

2007 ◽  
Vol 60 (4) ◽  
pp. 302 ◽  
Author(s):  
Vinod T. Kamble ◽  
Bhaskar S. Davane ◽  
Sanjay A. Chavan ◽  
Raghunath B. Bhosale
Keyword(s):  
Ethylene Glycol ◽  
Environmentally Benign ◽  
Preparation Procedure ◽  
Poly Ethylene Glycol ◽  
Thiazole Derivatives ◽  
Peg 400 ◽  
Convenient Approach ◽  
Poly Ethylene ◽  
High Yields ◽  
Green Procedure

An efficient and convenient approach for the synthesis of thiazole derivatives from α-halo ketones, thiosemicarbazide, and o-hydroxybenzaldehydes in poly(ethylene glycol) (PEG-400) is described. The preparation procedure presented is operationally simple and environmentally benign. Some of the major advantages of this procedure are high yields and ease of operation.

Direct Synthesis of Deep Cavity p-Phenylcalix[4]arene in Poly(Ethylene Glycol), and its Self-Association in the Solid State

2006 ◽  
Vol 59 (4) ◽  
pp. 260 ◽  
Author(s):  
Mohamed Makha ◽  
Colin L. Raston ◽  
Alexandre N. Sobolev
Keyword(s):  
Solid State ◽  
Ethylene Glycol ◽  
Direct Synthesis ◽  
Reaction Medium ◽  
State Structure ◽  
Poly Ethylene Glycol ◽  
Solid State Structure ◽  
Deep Cavity ◽  
Self Association ◽  
Poly Ethylene

p-Phenylcalix[4]arene is formed directly from p-phenylphenol in 66% yield (50% isolated yield) using poly(ethylene glycol) as the reaction medium, with crystallization of the pure cavitand from toluene mediated by p-carborane. The solid-state structure comprises interlocking columnar arrays.

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