45274-31-5Relevant academic research and scientific papers
Fatty acid monomer, preparation method and thermoplastic macromolecule synthesized through application
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Paragraph 0018; 0019, (2017/09/02)
The invention discloses a fatty acid monomer, a preparation method and a thermoplastic macromolecule synthesized through application. Tetramethyl guanidine and other catalysts are mainly utilized to catalyze a monomer containing halogen elements (Cl, Br and I) or halogen element and fatty acid, and the fatty acid monomer and thermoplastic macromolecule are obtained through efficient reaction. The application range can be thus widened by functionally improving the obtained fatty acid monomer and thermoplastic macromolecule. The reaction process is mild in condition, the catalytic efficiency of the catalysts is very high, few side reactions is produced, products are easy to separate and purify, and the fatty acid monomer and the thermoplastic macromolecule have a very high industrial application prospect.
Safe Removal of the Allyl Protecting Groups of Allyl Esters using a Recyclable, Low-Leaching and Ligand-Free Palladium Nanoparticle Catalyst
Takagi, Koji,Fukuda, Hayato,Shuto, Satoshi,Otaka, Akira,Arisawa, Mitsuhiro
supporting information, p. 2119 - 2124 (2015/06/23)
A safe, facile and low-leaching (up to 0.04ppm) method has been developed for the removal of allyl, prenyl and benzyl protecting groups from the corresponding esters, using a sulfur-modified gold-supported palladium (SAPd) nanoparticle catalyst, which is known to be non-flammable. The catalyst itself was found to be recyclable and the reaction appeared to proceed on the surface of the SAPd.
A green approach toward oleic- and undecylenic acid-derived polyurethanes
Gonzalez-Paz,Lluch,Lligadas,Ronda,Galia,Cadiz
experimental part, p. 2407 - 2416 (2012/04/11)
Naturally occurring oleic and undecylenic acids were used as raw materials for the synthesis of novel polyurethanes (PUs). The application of environmentally friendly thiol-ene additions to 10-undecenoate and oleate derivatives was studied with the goal of obtaining renewable diols. The resulting monomers were then polymerized with 4,4′-methylenebis (phenylisocyanate), in N,N-dimethylformamide solution using tin (II) 2-ethylhexanoate as catalyst, to produce the corresponding thermoplastic PUs (TPUs). Also, ultrasound irradiation has been tested to improve the synthesis of PU. Under these conditions, TPUs were obtained in high yields (80-99%) with weight-average molecular weights in the 36-83 kDa range. The chemical structures of PUs were assessed by FTIR and NMR spectroscopy. The thermal and mechanical properties of the synthesized TPUs have been studied and they showed a clear dependence on the structure of the parent diol. MTT test was carried out to asses the potential cytotoxicity of the prepared PUs, indicating no cytotoxic response.
Phase-Transfer Catalyzed Synthesis of 2-Propenyl Esters of Carboxylic Acids
Klan, Petr,Benovsky, Petr
, p. 469 - 472 (2007/10/02)
The tetrabutylammonium bromide catalyzed esterification of salts of carboxylic acids 1 a-e with 2-propenyl halides 2 a, b is described.Keywords.Esterification; Phase-transfer catalysis; 2-Propenyl esters.
