7529-33-1Relevant academic research and scientific papers
Method for preparing diacid diester compound under catalysis of deep eutectic solvent
-
Paragraph 0063-0066, (2021/05/19)
The invention belongs to the technical field of organic synthesis, and discloses a method for preparing a diacid diester compound through catalysis of a deep eutectic solvent, wherein the deep eutectic solvent takes ammonium salt and ferric salt as hydrogen acceptors, takes p-toluenesulfonic acid as a hydrogen donor, takes diacid or anhydride of the diacid and an alcohol compound as raw materials, and adopts a one-pot method to prepare the diacid diester compound; and under the catalysis of the deep eutectic solvent, the esterification reaction is performed to generate the diester product. The selected deep eutectic solvent has characteristics of environmental protection, easy preparation, cheap components and easy recovery; the preparation method has characteristics of simple operation, simple separation, no water-carrying agent, repeated use of the deep eutectic solvent, and high diester yield.
Synergism of microwaves and immobilized enzyme catalysis in synthesis of adipic acid esters in nonaqueous media
Yadav, Ganapati D.,Lathi, Piyush S.
, p. 1699 - 1705 (2007/10/03)
Low-energy microwave irradiation leads to enhancement by a factor of up to 2.63 in comparison with conventional heating in immobilized lipase-catalyzed esterification of adipic acid with various alcohols and this effect is due to the greater frequency of collision, without any change in activation energy of the two modes of heating. Copyright Taylor & Francis, Inc.
Selective monoesterification of dicarboxylic acids catalysed by ion-exchange resins
Nishiguchi, Takeshi,Ishii, Yasuhiro,Fujisaki, Shizuo
, p. 3023 - 3027 (2007/10/03)
Symmetrical dicarboxylic acids with 4-14 carbon atoms gave selectively the corresponding monoesters in high yields in the transesterification catalysed by strongly acidic ion-exchange resins in ester-hydrocarbon mixtures. It was found that the rate of the esterification of the dicarboxylic acids is much higher than that of the monocarboxylic acids formed. This result can explain the high selectivity for the monoester formation and can also be explained by the existence of an aqueous layer on the surface of the resins. This method of selective esterification is quite simple and practical. The Royal Society of Chemistry 1999.
Convenient selective monoesterification of α, ω-dicarboxylic acids catalyzed by ion-exchange resins
Saitoh, Masahiko,Fujisaki, Shizuo,Ishii, Yasuhiro,Nishiguchi, Takeshi
, p. 6733 - 6736 (2007/10/03)
Symmetric dicarboxylic acids, ranging from pentanedioic acid to tetradecanedioic acid, gave selectively the corresponding monoesters in high yields in the transesterification catalyzed by strongly acidic ion-exchange resins in ester/octane mixtures.
SELECTIVE MONOETHERIFICATION AND MONOESTERIFICATION OF DIOLS AND DIACIDS UNDER PHASE-TRANSFER CONDITIONS
Zerda, Jaime de la,Barak, Gabriela,Sasson, Yoel
, p. 1533 - 1536 (2007/10/02)
Research on the selectivity of etherification reactions of diols and esterification reactions of diacids by alkyl halides under phase-transfer catalysis has shown that under such conditions, selectivity of monoetherification increases in the order prim sec tert diols, though overall yield of monoether decreases from sec to tert diols.Monoesterification of diacids was accomplished with a high degree of selectivity.Optimal extraction of diols and diacids was found to correspond in general to chain lengths of around 5 carbons.This could mean that the complex formed between the catalyst and the anion to react is stabilized for certain carbon lengths by inner solvation in virtue of its spatial conformation.
