5175-48-4Relevant academic research and scientific papers
PRODUCTION METHOD OF UNSATURATED (POLY)ALKYLENE GLYCOL ETHER MONOMER AND PRODUCTION METHOD OF (POLY)ALKYLENE GLYCOL CHAIN-CONTAINING POLYMER
-
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.
Regio- and Stereoselectivity of the Intramolecular C-H Insertion by Cyclopropylidenes Bearing a Remote Oxido Substituent
Harada, Toshiro,Yamaura, Yasunari,Oku, Akira
, p. 1715 - 1720 (2007/10/02)
(ω-Oxidoalkyl)cyclopropylidenes generated from (2,2-dibromo-1-methylcyclopropyl)-CH2-X-(CH2)n-OH (X=CH2 or O, n=1, 2) by the reaction with methyllithium underwent a regioselective intramolecular insertion into the C-H bond at the δ position to the carbenic carbon.The activation effect of the oxido substituent on the reactivity of C-H bonds is discussed on the basis of (1) the ratio of the insertion products to the rearrangement product allenyl alcohol, and (2) the endo stereoselectivity of the present insertion reactions.
