Chain-growth condensation polymerization of 4-aminobenzoic acid esters bearing tri(ethylene glycol) side chain with lithium amide base

2010 ◽  
Vol 48 (6) ◽  
pp. 1357-1363 ◽  
Author(s):  
Kazuo Yoshino ◽  
Kotaro Hachiman ◽  
Akihiro Yokoyama ◽  
Tsutomu Yokozawa
Keyword(s):  
Ethylene Glycol ◽  
Side Chain ◽  
Chain Growth ◽  
Condensation Polymerization ◽  
Aminobenzoic Acid ◽  
Lithium Amide ◽  
Acid Esters

scholarly journals Direct condensation polymerization of N-alkylated p-aminobenzoic acid and packing of rigid-rod main chains with flexible side chains

2010 ◽  
Vol 42 (1) ◽  
pp. 72-80 ◽  
Author(s):  
Yuji Shibasaki ◽  
Yoko Abe ◽  
Natsuki Sato ◽  
Atsuhiro Fujimori ◽  
Yoshiyuki Oishi
Keyword(s):  
Side Chains ◽  
Condensation Polymerization ◽  
Aminobenzoic Acid ◽  
Rigid Rod ◽  
Direct Condensation

scholarly journals Sizing and Thermal Stability of Prepared Tetraaminophthalocyaninatocopper(II) Derivatives-grafted Polymers

2016 ◽  
Vol 13 (2) ◽  
pp. 221-234
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thermal Stability ◽  
Ethylene Glycol ◽  
Group Analysis ◽  
Condensation Polymerization ◽  
Grafted Polymers ◽  
Poly Ethylene Glycol ◽  
Molecular Weights ◽  
Poly Ethylene ◽  
Thermal Stability Of ◽  
End Group

Different polymers were prepared by condensation polymerization of sebacic anhydride and adipic anhydride with ethylene glycol and poly(ethylene glycol). Their number average molecular weights were determined by end group analysis. Then, they were grafted on the prepared phthalocyaninatocopper(II) compounds with the general formula (NH2)4PcCu(II) having amino groups of 3,3',3'',3'''- or 4,4',4'',4'''- positions. All prepared polymers, compounds, and phthalocyaninatocopper(II)-grafted polymers were characterized by FTIR. The sizing measurements were carried out in 3,3',3'',3'''- (NH2)4PcCu(II) and 4,4',4'',4'''- (NH2)4PcCu(II) compounds with and without grafting polymers. The results showed that the grafting process led to decreasing in particle size and increasing in surface area. The grafting process was reflected positively on the thermal degradation of 3,3',3'',3'''- (NH2)4PcCu(II) and 4,4',4'',4'''- (NH2)4PcCu(II) grafted polymers. They had higher thermal stability accompanied with higher char residue and T50% weight loss with 3,3',3'',3'''-(NH2)4PcCu(II) and their grafted polymers being the best.

Facile Synthesis of Highly FunctionalizedN-Methyl Amino Acid Esters without Side-Chain Protection

2005 ◽  
Vol 7 (19) ◽  
pp. 4111-4112 ◽  
Author(s):  
Kimberly N. White ◽  
Joseph P. Konopelski
Keyword(s):  
Amino Acid ◽  
Side Chain ◽  
Amino Acid Esters ◽  
Facile Synthesis ◽  
Acid Esters

Preparation and characterization of methoxy-poly(ethylene glycol) side chain grafted onto chitosan as a wound dressing film

2015 ◽  
Vol 132 (31) ◽  
pp. n/a-n/a ◽  
Author(s):  
Cheng-Han Yang ◽  
Szu-Hsien Chen ◽  
Yun-Wen Pan ◽  
Ching-Nan Chuang ◽  
Wen-Chi Chao ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Wound Dressing ◽  
Side Chain ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Chain-Growth Condensation Polymerization

2014 ◽  
pp. 1-10
Author(s):  
Tsutomu Yokozawa ◽  
Yoshihiro Ohta
Keyword(s):  
Chain Growth ◽  
Condensation Polymerization

Asymmetric Synthesis of 2,3,6-Trisubstituted Piperidines via Baylis–Hillman Adducts and Lithium Amide through Domino Reaction

Synlett ◽  
2019 ◽  
Vol 31 (06) ◽  
pp. 600-604 ◽  
Author(s):  
Mateo M. Salgado ◽  
Alejandro Manchado ◽  
Carlos T. Nieto ◽  
David Díez ◽  
Narciso M. Garrido
Keyword(s):  
Amino Acid ◽  
Asymmetric Synthesis ◽  
Claisen Rearrangement ◽  
Domino Reaction ◽  
Amino Acid Derivative ◽  
Side Chain ◽  
Lithium Amide ◽  
Stereochemical Control ◽  
Asymmetric Michael Addition ◽  
Polysubstituted Piperidines

A convenient asymmetric synthesis of methyl (2S,3S,6R)-6-(4-fluorophenyl)-2-(4-hydroxyphenyl)-piperidine-3-carboxylate is described, starting from Baylis–Hillman adducts. The route involves a domino process: allylic acetate rearrangement, stereoselective Ireland–Claisen rearrangement and asymmetric Michael addition, which provides a δ-amino acid derivative with full stereochemical control. A subsequent chemoselective transformation of one of the side-chain groups allows an effective cyclization leading to biologically interesting polysubstituted piperidines in which the 2,6-aryl groups could be attached sequentially.

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