7289-52-3Relevant academic research and scientific papers
Hydrochloric acid tests the Uygur logical sequence impurity a last of the ten Heavenly Stems ether preparation method (by machine translation)
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Paragraph 0039; 0040, (2017/04/11)
The invention discloses a hydrochloric acid tests the Uygur logical sequence impurity a last of the ten Heavenly Stems ether preparation method, specific steps are: sodium methoxide methanol solution to adding 1 - bromo decane, 20 - 30 °C reaction, after the reaction, is added into the medium and reagent, filtering, the filtrate is concentrated, to join the extractant in the concentrate and water, stirring of the liquid, the organic layer dried, filtered, concentrated to obtain yellow oil of, rectification under vacuum to get. The invention using 1 - bromo decane with sodium methoxide methanol solution reaction preparation armor last of the ten Heavenly Stems ether crude, is rectified to make qualified impurity control armor last of the ten Heavenly Stems ether. The invention raw materials are easy, low toxicity, non-harsh reaction conditions, overall the synthetic route is simple, low cost, high yield (70% or more), high purity of the product (99.2% above, wherein impurity 1 - decene content is smaller than 0.1%), can be hydrochloric acid tests the Uygur logical sequence quality control to provide qualified reference substance. (by machine translation)
The continuous acid-catalysed etherification of aliphatic alcohols using stoichiometric quantities of dialkyl carbonates
Parrott, Andrew J.,Bourne, Richard A.,Gooden, Peter N.,Poliakoff, Martyn,Irvine, Derek J.,Bevinakatti, Han. S.
experimental part, p. 1420 - 1426 (2011/09/20)
A range of methyl and ethyl ethers of aliphatic alcohols have been synthesized cleanly in high yield by reacting the corresponding alcohol with dimethyl carbonate or diethyl carbonate over the solid acid catalyst, I-alumina. The reaction could be conducted at ambient pressure without the need for the large excess of dialkyl carbonate as previously reported in the literature. If the reaction was conducted at high pressure, the conversion of the starting alcohol was greatly reduced. However, high pressure CO2 can be used as the solvent without significant reduction in yield. This has implications for tandem reactions.
Decarboxylative photosubstitution of dicyanobenzenes with aliphatic carboxylate ions
Itou, Tatsuya,Yoshimi, Yasuharu,Morita, Toshio,Tokunaga, Yuji,Hatanaka, Minoru
experimental part, p. 263 - 269 (2009/04/07)
The photoreaction of dicyanobenzenes with aliphatic carboxylate ions afforded alkylcyanobenzenes and alkyldicyanobenzenes via decarboxylative substitution. The redox-photosensitized reaction system was effective in improving the product yield. The efficie
METHOD FOR THE SYNTHESIS OF QUATERNARY AMMONIUM COMPOUNDS AND COMPOSITIONS THEREOF
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Page/Page column 49-50; 55-59, (2008/06/13)
A novel manufacturing process is described for producing quaternary ammonium compounds having a selected anion, which may be useful in wood preservative formulations. The process involves reacting a trialkylamine with an alkyl bromide to form a quaternary tetraalkylammonium bromide salt, converting the quaternary tetraalkylammonium bromide salt to a quaternary tetraalkylammonium hydroxide salt by using an ion exchange resin, and converting the quaternary tetraalkylammonium hydroxide salt to the quaternary tetraalkylammonium salt of the selected anion.
Synthesis of the marine compound (2R,5Z,9Z)-2-methoxyhexacosa-5,9-dienoic acid via a lipase-catalyzed resolution and a novel O-alkylation protocol
Kulkarni, Bheemashankar A.,Sharma, Anubha,Gamre, Sunita,Chattopadhyay, Subrata
, p. 595 - 599 (2007/10/03)
The title compound has been synthesized by a facile route starting from 4-pentyn-1-ol. The enantioselectivity was attained by a strategy involving a lipase-catalyzed acetylation of a solid-phase immobilized long chain α-hydroxy acid. Another important feature of the synthesis was the formulation of an efficient HgO-catalyzed O-methylation of the α-hydroxy acids which proceeded without any racemization. The alkylation protocol was also highly efficient for selective mono-methylation/benzylation of symmetrical diols.
Improved procedure for the synthesis of methyl ethers from alcohols
Rao, H. Surya Prakash,Senthilkumar,Reddy, D. Srinivasa,Mehta, Goverdhan
, p. 260 - 263 (2007/10/03)
Alcohols can be conveniently converted to the corresponding methyl ethers with methyl iodide in the presence of KOH under solvent-free conditions.
Elimination and Substitution Reactions of 1-Bromodecane with Alkoxide Ions in Dimethyl Sulfoxide/Alcohol Mixtures
Aksnes, Gunnar,Stensland, Per
, p. 893 - 895 (2007/10/02)
The rates of elimination and substitution reactions of 1-bromodecane have been studied using potassium hydroxide, methoxide, ethoxide, isopropoxide, and t-butoxide in the corresponding dimethyl sulfoxide/alcohol mixtures.Parallel studies have also been performed in the presence of 0.1 M 18-crown-6 in the same reaction mixtures.From estimation of the H--function of the alkoxide mixtures it is found that the elimination and substitution reactions follow a Broensted relation (ln k =A+βH-), where β-coefficient of elimination is always greater than the β-coefficient of substitution towards the same alkoxide.Linear extrapolation of the Broensted relation (ln k vs.H-) in DMSO/alcohol mixtures shows that: (a) elimination totally dominates at very high H- and (b) MeO- is a stronger base than EtO- and t-BuO- when the ions become strongly desolvated.The results accord with the finding that the basicity of completely desolvated alkoxide ions in the gas phase decreases in the following series: MeO->EtO->i-PrO->t-BuO-, and that 1-bromopropane and methoxide ions in the gas phase give exclusively propene.
Methylation of Alcohols and Phenols Adsorbed on Silica Gel with Diazomethane
Ogawa, Haruo,Hagiwara, Toshikazu,Chihara, Teiji,Teratani, Shousuke,Taya, Kazuo
, p. 627 - 630 (2007/10/02)
Alcohols and phenols adsorbed on silica gel react with diazomethane and quantitatively afford the corresponding methyl ethers.Alumina and titanium dioxide are also effective adsorbents for the reaction.
Methylation of Alcohols, Phenols, and Carboxylic Acids, and Selective Monomethylation of Diols and Dicarboxylic Acids with Dimethyl Sulfate by Use of Alumina
Ogawa, Haruo,Ichimura, Youko,Chihara, Teiji,Teratani, Shousuke,Taya, Kazuo
, p. 2481 - 2484 (2007/10/02)
Alcohols in cyclohexane give their methyl ethers in high yields by the use of a combination of dimethyl sulfate and alumina.Some diols and dicarboxylic acids adsorbed on alumina react with dimethyl sulfate and produce the corresponding monomethyl ethers and esters in high selectivities.
