20515-19-9Relevant articles and documents
Methyl 4-methoxypentanoate: A novel and potential downstream chemical of biomass derived gamma-valerolactone
Li, Zheng,Jiang, Yetao,Tang, Xing,Zuo, Miao,Zeng, Xianhai,Sun, Yong,Lin, Lu
, p. 8297 - 8300 (2015)
Lignocellulosic derived gamma-valerolactone was effectively converted into methyl 4-methoxypentanoate, a potential liquid biofuel, solvent and fragrance, by the catalysis of a hydrogen exchanged ultra-stable Y zeolite (HUSY) and insoluble carbonates such as CaCO3. The catalytic competing generation process between methyl 4-methoxypentanoate and pentenoate esters was also analysed.
Ozeki,Kusaka
, p. 2686 (1967)
Electrochemical reduction of CO2 in the presence of 1,3-butadiene using a hydrogen anode in a nonaqueous medium
Grinberg, V. A.,Koch, T. A.,Mazin, V. M.,Mysov, E. I.,Sterlin, S. R.
, p. 294 - 299 (1999)
The possibility or anodic generation of a solvated proton on gas-diffusion electrode in an aprotic medium in the presence of carbon dioxide and 1,3-butadiene has been demonstrated. Formic acid was shown to be the only product of the reaction in the initially approtic medium with the use of a hydrogen gas-diffusion anode. The influence of the counterion on the reactivity of the CO2*- radical anion in electrocarboxylation was shown experimentally.
Brewis,Hughes
, p. 489 (1965)
Modulation of N^N′-bidentate chelating pyridyl-pyridylidene amide ligands offers mechanistic insights into Pd-catalysed ethylene/methyl acrylate copolymerisation
ó Máille, Gearóid M.,Albrecht, Martin,Dall'Anese, Anna,Grossenbacher, Philipp,Milani, Barbara,Montini, Tiziano
, p. 6133 - 6145 (2021/05/19)
The efficient copolymerisation of functionalised olefins with alkenes continues to offer considerable challenges to catalyst design. Based on recent work using palladium complexes containing a dissymmetric N^N′-bidentate pyridyl-PYA ligand (PYA = pyridylidene amide), which showed a high propensity to insert methyl acrylate, we have here modified this catalyst structure by inserting shielding groups either into the pyridyl fragment, or the PYA unit, or both to avoid fast β-hydrogen elimination. While a phenyl substituent at the pyridyl side impedes catalytic activity completely and leads to an off-cycle cyclometallation, the introduction of an ortho-methyl group on the PYA side of the N^N′-ligand was more prolific and doubled the catalytic productivity. Mechanistic investigations with this ligand system indicated the stabilisation of a 4-membered metallacycle intermediate at room temperature, which has previously been postulated and detected only at 173 K, but never observed at ambient temperature so far. This intermediate was characterised by solution NMR spectroscopy and rationalises, in part, the formation of α,β-unsaturated esters under catalytic conditions, thus providing useful principles for optimised catalyst design.
Method for enhancing long-chain olefin hydrogen esterification reaction by ionic liquid
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Paragraph 0039-0064, (2021/06/13)
The invention relates to a method for preparing carboxylic ester through long-chain olefin hydrogen esterification reaction. The method is characterized by comprising the following steps: mixing long-chain olefin of which the C number is greater than or equal to 4 with a catalyst, a carbonyl source and alkyl alcohol according to a certain ratio, and carrying out hydrogen esterification reaction in a high-boiling-point solvent such as ester, ketone, ether, amide, aromatic hydrocarbon, sulfone (sulfoxide) or conventional ionic liquid. The first ligand is a bidentate phosphine ligand, and the second ligand is an ionic liquid containing a single-coordination central atom (N, P). The method has the advantages that raw material gas and liquid phases can be in full contact, the catalyst and a high-boiling-point solvent system can be recycled, and rapid separation of the catalyst and a product is achieved. In the conjugated olefin hydrogen esterification reaction, the olefin conversion rate is more than 80%, and the product selectivity is more than 85%; in the monoolefine hydrogen esterification reaction, the olefin conversion rate is greater than 90%, and the product selectivity is greater than 95%.
