50856-26-3Relevant academic research and scientific papers
Direct vinylation of natural alcohols and derivatives with calcium carbide
Teong, Siew Ping,Chua, Ariel Yi Hui,Deng, Shiyun,Li, Xiukai,Zhang, Yugen
supporting information, p. 1659 - 1662 (2017/06/07)
Vinyl ethers are essential synthetic building blocks for organic synthesis, especially for polymer synthesis and highly vinylated polyol substrates. Herein, a transition metal-free, mild, and safe protocol has been developed for direct vinylation of natural alcohols with calcium carbide. Various sugar alcohols, phenol and its derivatives were tested and proved successful using this green methodology. Selectivity of full vinylated products of the reaction decreases with increasing hydroxyl groups because of side reactions occurring under the basic medium. Electron-donating substituted phenols work more efficiently than electron-withdrawing substituted phenols in general. This methodology may provide new insights on selective vinylation of electron-rich biomass-derived materials.
PROCESS FOR PREPARING DIVINYL ETHERS
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Page/Page column 3, (2012/09/05)
Process for preparing divinyl ethers by reacting compounds having two hydroxyl groups (hereinafter referred to as diols) with acetylene, wherein the hydroxyl groups are incompletely reacted with acetylene and the resulting product mixture therefore comprises the monovinyl ether in addition to the divinyl ether andthe monovinyl ether is separated off from the product mixture by extractive distillation in the presence of an extractant.
Nucleophilic addition to acetylenes in superbasic catalytic systems: XIV. Vinilation of diols in a system CsF-NaOH
Oparina,Khil'ko,Chernyshova,Shaikhudinova,Parshina,Preiss,Henkelmann,Trofimov
, p. 661 - 666 (2007/10/03)
A new catalytic system CsF-NaOH was developed for the synthesis of mono- and divinyl ethers of alkanediols exceeding in efficiency KOH. The nucleophilic addition of diols to acetylene in the presence of this system occurs both at enhance pressure (without solvent, 140-160°C) and atmospheric pressure (in DMSO medium, 100°C) of acetylene. Conditions were established of a selective preparation in a high yield of divinyl ethers from diols. 2005 Pleiades Publishing, Inc.
Development of a highly efficient catalytic method for synthesis of vinyl ethers
Okimoto, Yoshio,Sakaguchi, Satoshi,Ishii, Yasutaka
, p. 1590 - 1591 (2007/10/03)
A new method for the preparation of alkyl vinyl ethers has been developed. Thus, various types of alkyl vinyl ethers were synthesized by the reaction of alcohols with vinyl acetate under the influence of a catalytic amount of [Ir(cod)Cl]2 combined with Na2CO3 in good to excellent yields. Copyright
Purification of alkenyl compounds
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Page column 8, (2008/06/13)
A process for purifying alkenyl compounds having a divalent or trivalent heteroatom in the à-position relative to the double bond by distillation comprises carrying out at least two distillations in which the purified alkenyl compounds are obtained from the gas phase by condensation, where the time between the first distillation after the synthesis of the alkenyl compounds and at least one further distillation is at least one day and the purified alkenyl compounds have an APHA color number of 30.
Pd-catalyzed inter- and intramolecular carbene transfer from group 6 metal-carbene complexes
Sierra,Del Amo,Mancheno,Gomez-Gallego
, p. 851 - 861 (2007/10/03)
The use of group 6 metal-carbene complexes in inter- and intramolecular carbene transfer reactions has been studied. Thus, pentacarbonyl[(aryl)(methoxy)carbene]chromium(0) and tungsten complexes, 10, efficiently dimerize at room temperature in the presenc
Nucleophilic addition to acetylenes in superbasic catalytic systems. IX. Anions of oligo(ethylene glycol)s and monomethyl ethers thereof
Parshina,Sokolyanskaya,Nosyreva,Scotheim,Zefirov,Trofimov
, p. 202 - 206 (2007/10/03)
In superbasic system KOH-DMSO increases velocity and selectivity of nucleophilic addition of oligo(ethylene glycol)s and their monometyl ethers to acetylene. Accumulation of ethylene oxide units in the molecule additionally activates it to vinylation process due to formation of crown-like structure which increases the basicity of the medium and nucleophilicity of the reacting anions.
Sulfurization of polymers 1. The reaction of polydialkylsiloxanes with elemental sulfur and electrochemical behavior of the products
Trofimov, B. A.,Skotheim, T. A.,Parshina, L. N.,Khil'ko, M. Ya.,Oparina, L. A.,Kovalev, L. P.,Gavrilov, A. B.
, p. 463 - 469 (2007/10/03)
The hydrosilylation of vinyl methyl and divinyl ethers of oligoethylene glycols with polyhydridosiloxanes in the presence of chloroplatinic acid is accompanied by side processes, namely, polymerization of vinyl ethers and homodehydrocondensation of polyhydridosiloxanes. The electrical conductivity of ca. 1 M solutions of lithium triflate or bis(trifluoromethylsulfonyl) imide in the resulting hydrosilylation products is ca. 10-5 S cm-1.
Liquid-phase fluorination
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, (2008/06/13)
This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
