26776-29-4Relevant articles and documents
A direct synthesis of carboxylic acidsviaplatinum-catalysed hydroxycarbonylation of olefins
Schneider, Carolin,Franke, Robert,Jackstell, Ralf,Beller, Matthias
, p. 2703 - 2707 (2021/05/05)
The platinum-catalysed hydroxycarbonylation of olefins is reported for the first time. Using a combination of PtCl2/2,2′-bis(tert-butyl(pyridin-2-yl)phosphanyl)-1,1′-binaphthalene (Neolephos) in the presence of sulfuric acid [0.6 M] in acetic acid selective carbonylation of terminal aliphatic olefins proceeds to good yields and selectivities to the corresponding carboxylic acids. Comparing the reactivity of different butenes (iso- andn-butenes), the terminal olefin can be selectively carbonylated.
Synthesis of Dicarboxylic Acids from Aqueous Solutions of Diols with Hydrogen Evolution Catalyzed by an Iridium Complex
Fujita, Ken-ichi,Toyooka, Genki
, (2020/07/13)
A catalytic system for the synthesis of dicarboxylic acids from aqueous solutions of diols accompanied by the evolution of hydrogen was developed. An iridium complex bearing a functional bipyridonate ligand with N,N-dimethylamino substituents exhibited a high catalytic performance for this type of dehydrogenative reaction. For example, adipic acid was synthesized from an aqueous solution of 1,6-hexanediol in 97 % yield accompanied by the evolution of four equivalents of hydrogen by the present catalytic system. It should be noted that the simultaneous production of industrially important dicarboxylic acids and hydrogen, which is useful as an energy carrier, was achieved. In addition, the selective dehydrogenative oxidation of vicinal diols to give α-hydroxycarboxylic acids was also accomplished.
Molecularization of Bitter Off-Taste Compounds in Pea-Protein Isolates (Pisum sativum L.)
Gl?ser, Peter,Dawid, Corinna,Meister, Stefanie,Bader-Mittermaier, Stephanie,Schott, Michael,Eisner, Peter,Hofmann, Thomas
, p. 10374 - 10387 (2020/10/26)
Activity-guided fractionations, combined with taste dilution analyses (TDA), were performed to locate the key compounds contributing to the bitter off-taste of pea-protein isolates (Pisum sativum L.). Purification of the compounds perceived with the highe
Direct and Selective Synthesis of Adipic and Other Dicarboxylic Acids by Palladium-Catalyzed Carbonylation of Allylic Alcohols
Beller, Matthias,Ge, Yao,Huang, Weiheng,Jackstell, Ralf,Liu, Jiawang,Neumann, Helfried,Yang, Ji
supporting information, p. 20394 - 20398 (2020/09/21)
A general and direct synthesis of dicarboxylic acids including industrially important adipic acid by palladium-catalyzed dicarbonylation of allylic alcohol is reported. Specifically, the combination of PdCl2 and a bisphosphine ligand (HeMaRaphos) promotes two different carbonylation reactions with high activity and excellent selectivity.
PROCESS FOR THE CO-PRODUCTION OF LONG CHAIN AMINO ACIDS AND DIBASIC ACIDS
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Paragraph 0063-0065, (2019/02/01)
There is disclosed a process for the co-production of long chain ω-amino acid and long chain dibasic acid, comprising: (1) reacting long chain ketoacid derivative with hydroxylamine or subjecting ketoacid derivative to an ammoximation to yield oxime derivative; (2) subjecting oxime derivative to Beckmann rearrangement to yield a mixture of mixed amide derivatives; (3) hydrolyzing the mixed amide derivatives to produce long chain ω-amino acid and long chain dibasic acid.
Synthesis of medium-chain carboxylic acids or α,ω-dicarboxylic acids from cellulose-derived platform chemicals
Li, Xing-Long,Zhang, Kun,Jiang, Ju-Long,Zhu, Rui,Wu, Wei-Peng,Deng, Jin,Fu, Yao
supporting information, p. 362 - 368 (2018/02/07)
Medium-chain fatty acids and their derivatives have important applications in the energy and chemical industries. Thus, we have prepared a series of medium-chain fatty acids by the selective hydrodeoxygenation of the aldol condensation products derived from cellulose using a metal triflate and Pd/C catalyst system. The selective retention of the carboxyl group is a notable feature of this catalytic system.
Microalgae lipids as a feedstock for the production of benzene
Pingen, Dennis,Zimmerer, Julia,Klinkenberg, Nele,Mecking, Stefan
, p. 1874 - 1878 (2018/04/30)
A two-step one-pot synthesis of benzene from the five-fold unsaturated fatty acid eicosapentaenoic acid (EPA), a component of microalgae oils, is presented. By a sequence of olefin metathesis and the catalytic dehydrogenation of the resulting 1,4-cyclohexadiene, two equivalents of benzene are effectively formed per EPA substrate molecule. As the only major by-products, 5-octenoic acid and 5-decenedioic acid are formed. Performing the dehydrogenation step under hydrogen pressure results in the formation of their saturated analogues, sebacic acid and octanoic acid, both desirable products, while the simultaneous dehydrogenation step to benzene is not hampered.
Process for producing long chain amino acids and dibasic acids
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, (2018/09/21)
There is disclosed a process for the production of long chain amino acid and long chain dibasic acid, comprising: (1) reacting long chain keto fatty acid with hydroxylamine or subjecting keto fatty acid to an ammoximation reaction to yield an oxime fatty acid; (2) subjecting the oxime fatty acid to the Beckmann rearrangement to yield a mixture of two amide fatty acids; (3) hydrolyzing the mixed amide fatty acids to produce long chain amino acid, long chain dibasic acid, short chain alkylamine, and alkanoic acid.
Preparation method of 1,10-sebacic acid
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Paragraph 0077; 0082; 0087; 0092; 0097; 0102; 0107, (2018/03/01)
The invention discloses a preparation method of 1,10-sebacic acid. The preparation method includes: subjecting substance A to hydrolyzing and ring opening in an acid environment to obtain 4,7-diketone-1, and 10-sebacic acid; subjecting 4,7-diketone-1, 10-sebacic acid, hydrogen, trifluoromethanesulfonic salt and a hydrogenation catalyst to hydrodeoxygenation to obtain the 1,10-sebacic acid. The preparation method is good in atom economy, high in product yield, high in product purity, less in environment pollution, simple in process route, convenient in operation, cheap in raw materials which are easy to obtain and suitable for industrialized mass production.
The aliphatic dicarboxylic acid compound (by machine translation)
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Paragraph 0040; 0049; 0050, (2017/08/02)
PROBLEM TO BE SOLVED: To obtain an aliphatic dicarboxylic acid compound industrially useful as a monomer for high molecular compounds in a high yield and good selectivity under mild conditions.SOLUTION: An aliphatic cyclic hydrocarbon compound such as cyclohexane is efficiently oxidized into an aliphatic dicarboxylic acid compound by oxidizing the aliphatic cyclic hydrocarbon compound with nitric acid or a nitrate, in the presence of trifluoroacetic acid and an N-hydroxyimide compound. When an aliphatic cyclic hydrocarbon compound having a symmetric structure is adopted as a raw material, the obtained aliphatic dicarboxylic acid compound is single.
