50975-38-7Relevant academic research and scientific papers
Synthesis of C2-symmetric chiral crown ethers by lipase-catalyzed reactions
Nakamura, Misako,Taniguchi, Takuya,Ishida, Naohisa,Hayashi, Keishi,Muraoka, Masahiro,Nakatsuji, Yohji
scheme or table, p. 9298 - 9304 (2011/12/03)
Kinetic resolution of a racemic mixture of C2-symmetric 18-crown-6 diols (rac-1a) and 15-crown-5 diol (rac-1c) was achieved by lipase-catalyzed acetylation. The enantiomeric excess of the chiral crown diols (95% ee and 82% ee) was determined by 1H NMR spectroscopy, using (R)-(+)-1-(1-naphthyl)ethylammonium hydrochloride as a shift reagent. The C 2-symmetric chiral 15-crown-5 diol (>95% ee) was also obtained by kinetic resolution of the racemic diacetate (rac-2c) using lipase-catalyzed solvolysis.
PRODUCTION METHOD OF UNSATURATED (POLY)ALKYLENE GLYCOL ETHER MONOMER AND PRODUCTION METHOD OF (POLY)ALKYLENE GLYCOL CHAIN-CONTAINING POLYMER
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Page/Page column 37, (2010/06/14)
To provide a production method of a (poly)alkylene glycol chain-containing polymer which can be preferably used in various applications such as an admixture for cement and which can exhibit extremely high dispersibility to a cement composition. The unsaturated (poly)alkylene glycol ether monomer of the present invention is an unsaturated (poly)alkylene glycol ether monomer production method for producing an unsaturated (poly)alkylene glycol ether monomer by addition reaction of an alkylene oxide on an unsaturated alcohol, wherein the production method includes a step of carrying out addition reaction under condition of existence of 0.01 to 25 parts by mass of an unsaturated (poly)alkylene glycol diether monomer to 100 parts by mass of the unsaturated alcohol, and a (poly)alkylene glycol chain-containing polymer production method, wherein a monomer component including an unsaturated (poly)alkylene glycol ether monomer produced by the production method.
