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.

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.

Perfluoropolyether/poly(ethylene glycol) triblock copolymers with controllable self-assembly behaviour for highly efficient anti-bacterial materials

RSC Advances ◽  
2015 ◽  
Vol 5 (79) ◽  
pp. 64170-64179 ◽  
Author(s):  
Jing Song ◽  
Qun Ye ◽  
Wang Ting Lee ◽  
Xiaobai Wang ◽  
Tao He ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Self Assembly ◽  
Click Reaction ◽  
Triblock Copolymers ◽  
Poly Ethylene Glycol ◽  
Highly Efficient ◽  
Poly Ethylene ◽  
High Yields

A series of perfluoropolyether/poly(ethylene glycol) (PFPE/PEG) triblock copolymers PEG/PFPE/PEG (P1–P3) and PFPE/PEG/PFPE (P4–P5) were prepared via thiol–ene click reaction in high yields.

Synthesis, Characterization and Crystallization of Poly(Ethylene Glycol)-b-Poly(ε-Caprolactone)

2010 ◽  
Vol 152-153 ◽  
pp. 1665-1668
Author(s):  
Lian Liu ◽  
Pei Wang ◽  
Chao Qu ◽  
Zhi Yong Wei ◽  
Min Qi
Keyword(s):  
Ethylene Glycol ◽  
Ring Opening ◽  
Relative Length ◽  
Copolymer Composition ◽  
Poly Ethylene Glycol ◽  
Crystallization Behaviors ◽  
Poly Ethylene ◽  
Xrd Patterns ◽  
High Yields ◽  
Dsc Curves

A family of poly(ethylene glycol)-b-poly(ε-caprolactone) (PEG-PCL) were synthesized in high yields by the ring-opening polymerization of monomethoxy-terminated poly(ethylene glycol) (mPEG) with ε-caprolactone in the presence of stannous octoate (Sn(Oct)2). Their crystallization behaviors were studied by DSC, XRD. The results illustrated that crystallization behaviors of the copolymers depended on the copolymer composition and the relative length of each block in copolymers. The melting peak of PCL block appeared gradually in the XRD patterns and DSC curves in copolymers, with increasing of the length of PCL blocks.

scholarly journals Preparation and characterization of PEG-assisted growth of colloidal Ag nanoparticles

2017 ◽  
Vol 3 (6) ◽  
pp. 65
Author(s):  
Elalyaa M. A. Mohamed ◽  
Wael H. Eisa ◽  
T. A. Abdel-Baset ◽  
S. Mahrous
Keyword(s):  
Silver Nanoparticles ◽  
Ethylene Glycol ◽  
Ag Nanoparticles ◽  
Poly Ethylene Glycol ◽  
Peg 400 ◽  
Green Route ◽  
Uv Visible ◽  
Poly Ethylene ◽  
Transmission Microscope

Colloidal Silver nanoparticles were prepared under mild conditions using poly(ethylene glycol) (PEG) in the presence of PVA as surfactant. Ethylene glycol was used as a reducing agent for the preparation of metal particles at room temperature. Ag+1can be smoothly reduced to silver nanoparticles at ambient condition in PEG 400. UV-visible studies demonstrated that the reducing rate of Ag+1to nano-Ag was remarkably enhanced with the increased amount of the PEG. The transmission microscope images prove that the reduced Ag nanoparticles were spherical in shape. The pathway described here was considered as a green route for preparation of silver nanoparticles.

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.

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