- Preparation and hydrolysis of poly(2-benzoyloxyethyl vinyl ether) with a narrow molecular weight distribution
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2-Benzoyloxyethy vinyl ether (BOEVE) was cationically polymerized with the hydrogen iodide/zinc iodide (HI/Znl2) initiating system in toluene at - 15°C to form a narrow molecular weight distribution (MWD). The poly(BOEVE) obtained had a narrow MWD (M(w)/M(n)1.2, M(w): weight-average molecular weight, M(n): number-average molecular weight). The M(n) of the poly(BOEVE) increased directly in proportion to the BOEVE conversion and to the reciprocal of the initial HI concentration, that is, the reaction was found to be a living polymerization. The hydrolysis rate of the polymer in the alkaline dioxane-water system decreased with increase in the M(n) of the polymer.
- Ogawa, Naotake,Taguchi, Hiroyuki,Honda, Yoshihiro,Sato, Takatoshi
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- Togni-II Reagent Mediated Selective Hydrotrifluoromethylation and Hydrothiolation of Alkenes?
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Based on the redox reactions of Togni-II reagent and thiols, a thiol-tuned selective functionalization of unactivated olefins was disclosed. In combination with aryl thiols, stoichiometric amount of Togni-II reagent prompted a hydrotrifluoromethylation of alkenes, in which, aryl thiols played as reductant and hydrogen source; while by utilization of alkyl thiols, catalytic amount of Togni-II reagent initiated thiol-ene and thiol-yne reactions. The reported applications are characterized by their operational simplicity and wide functional group tolerance.
- Teng, Shuang,Meng, Lingkui,Xu, Bingbing,Tu, Guangsheng,Wu, Peng,Liao, Zhiwen,Tan, Yulin,Guo, Jian,Zeng, Jing,Wan, Qian
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supporting information
p. 3429 - 3434
(2021/11/08)
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- MODULATORS OF THE INTEGRATED STRESS RESPONSE PATHWAY
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The present invention relates to compounds of formula (I) or pharmaceutically acceptable salts, solvates, hydrates, tautomers or stereoisomers thereof, wherein R1, R2, R2a, R3, Ra2, Ra4, R
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Page/Page column 81-82
(2020/12/30)
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- VINYLOXYETHYL ESTERS OF MONOCARBOXYLIC ACIDS.
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The authors examine methods of synthesis and the properties of 2-vinyloxyethyl acylates, a little-studied class of organic compounds on which literature information is very limited and which are of interest as possible monomers for synthesis of macromolecular compounds and as synthetic models of natural physiologically active substances. Methods have been devised for synthesis of 2-vinyloxyethyl acylates - potential monomers for synthesis of macromolecular and physiologically active compounds. The structural characteristics of the synthesized compounds were studied. Cationic polymerization of 2-vinyloxyethyl acylates was carried out, and the dependence of the reaction rate and of the properties of the resultant oligomers on the nature of the acyl radical was determined.
- Mikhant'eva,Romanova,Mikhan'tev
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p. 1017 - 1022
(2007/10/02)
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