54802-79-8Relevant articles and documents
Cyanide-Free One-Pot Synthesis of Methacrylic Esters from Acetone
Koyama, Minoru,Kawakami, Takafumi,Okazoe, Takashi,Nozaki, Kyoko
, p. 10913 - 10917 (2019/08/02)
Methacrylic esters, represented by methyl methacrylate (MMA), are widely used as commodity chemicals. Here, the one-pot synthesis of methacrylic esters from acetone, a haloform and alcohols in the presence of an organic base is described. Using DBU as the organic base for the reaction of acetone, chloroform and methanol in acetonitrile afforded MMA in 66 % yield. When the solvent was replaced by benzonitrile, the product MMA was successfully purified by distillation. Applicability of this process to various alcohols was also investigated to show ethyl, phenyl, CF3CH2, and n-C6F13CH2CH2 esters were obtained in moderate yields. The use of bromoform instead of chloroform resulted in the improvement of the yield, for example, methyl and n-C6F13CH2CH2 esters up to 81 and 70 %, respectively. The reaction with deuterated starting materials acetone-d6 and MeOH-d4, with DBU in acetonitrile afforded deuterated MMA (MMA-d8) in 70 % yield.
Composition (by machine translation)
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Paragraph 0066, (2017/06/13)
[Problem] this invention, facilitate the purification of the acrylic acid derivative, and to improve efficiency. [Solution] A: (I) of formula:[In the formula, R1 The, 1 - 4 carbon alkyl group, 1 - 4 carbon atoms or a fluoroalkyl group, and R2 The, a halogen atom, a methyl group, a fluoroalkyl group, or a hydrogen atom. ]The acrylic acid derivative represented, and[B] 120 °C compositions containing ionic liquid at a temperature of liquid. [Drawing] no (by machine translation)
Esterfication process for production of fluoroalkyl (meth)acrylate by pervaporation-aided membrane reactor
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Page/Page column 4, (2008/06/13)
The present invention relates to a process for preparing fluoroacrylic acid ester using a pervaporation composite membrane, in particular, to a process for preparing fluoroacrylic acid ester performed in such a manner that water and unreacted fluoroalcohol generated in esterification between fluoroalcohol and (meth)acrylic acid in the presence of an acid catalyst are condensed and then passed through a pervaporation membrane to effectively remove water, followed by recycling the unreacted fluoroalcohol removed of water. The present process exhibits much higher conversion rate of fluoroacrylic acid ester, allows the decrease of energy consumption and could be performed in environment-friendly manner.