Organocatalysts wrapped around by poly(ethylene glycol)s (PEGs): a unique host–guest system for asymmetric Michael addition reactions

2007 ◽  
pp. 4393 ◽  
Author(s):  
Dan Qian Xu ◽  
Shu Ping Luo ◽  
Yi Feng Wang ◽  
Ai Bao Xia ◽  
Hua Dong Yue ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Michael Addition ◽  
Addition Reactions ◽  
Poly Ethylene Glycol ◽  
Asymmetric Michael Addition ◽  
Guest System ◽  
Poly Ethylene

scholarly journals Synthesis of Network Polymers by Means of Addition Reactions of Multifunctional-Amine and Poly(ethylene glycol) Diglycidyl Ether or Diacrylate Compounds

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2047
Author(s):  
Naofumi Naga ◽  
Mitsusuke Sato ◽  
Kensuke Mori ◽  
Hassan Nageh ◽  
Tamaki Nakano
Keyword(s):  
Ethylene Glycol ◽  
Room Temperature ◽  
Addition Reaction ◽  
Monomer Concentration ◽  
Diglycidyl Ether ◽  
Porous Polymers ◽  
Addition Reactions ◽  
Poly Ethylene Glycol ◽  
Network Polymers ◽  
Poly Ethylene

Addition reactions of multi-functional amine, polyethylene imine (PEI) or diethylenetriamine (DETA), and poly(ethylene glycol) diglycidyl ether (PEGDE) or poly(ethylene glycol) diacrylate (PEGDA), have been investigated to obtain network polymers in H2O, dimethyl sulfoxide (DMSO), and ethanol (EtOH). Ring opening addition reaction of the multi-functional amine and PEGDE in H2O at room temperature or in DMSO at 90 °C using triphenylphosphine as a catalyst yielded gels. Aza-Michael addition reaction of the multi-functional amine and PEGDA in DMSO or EtOH at room temperature also yielded corresponding gels. Compression test of the gels obtained with PEI showed higher Young’s modulus than those with DETA. The reactions of the multi-functional amine and low molecular weight PEGDA in EtOH under the specific conditions yielded porous polymers induced by phase separation during the network formation. The morphology of the porous polymers could be controlled by the reaction conditions, especially monomer concentration and feed ratio of the multi-functional amine to PEGDA of the reaction system. The porous structure was formed by connected spheres or a co-continuous monolithic structure. The porous polymers were unbreakable by compression, and their Young’s modulus increased with the increase in the monomer concentration of the reaction systems. The porous polymers absorbed various solvents derived from high affinity between the polyethylene glycol units in the network structure and the solvents.

Hydroxy-Assisted Catalyst-Free Michael Addition—Dehydroxylation of Baylis—Hillman Adducts in Poly(ethylene glycol).

ChemInform ◽  
2006 ◽  
Vol 37 (31) ◽  
Author(s):  
S. Chandrasekhar ◽  
B. Saritha ◽  
V. Jagadeswar ◽  
Ch. Narsihmulu ◽  
Dolly Vijay ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Michael Addition ◽  
Poly Ethylene Glycol ◽  
Catalyst Free ◽  
Poly Ethylene

Preparation of Nanocomposite Poly(allylamine)−Poly(ethylene glycol) Thin Films Using Michael Addition

Langmuir ◽  
2000 ◽  
Vol 16 (8) ◽  
pp. 4052-4054 ◽  
Author(s):  
Ryan J. Russell ◽  
Kaushik Sirkar ◽  
Michael V. Pishko
Keyword(s):  
Thin Films ◽  
Ethylene Glycol ◽  
Michael Addition ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Hydroxy-assisted catalyst-free Michael addition-dehydroxylation of Baylis–Hillman adducts in poly(ethylene glycol)

2006 ◽  
Vol 47 (17) ◽  
pp. 2981-2984 ◽  
Author(s):  
S. Chandrasekhar ◽  
B. Saritha ◽  
V. Jagadeshwar ◽  
Ch. Narsihmulu ◽  
Dolly Vijay ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Michael Addition ◽  
Poly Ethylene Glycol ◽  
Catalyst Free ◽  
Poly Ethylene
Sign in / Sign up

Export Citation Format

Share Document