110-34-9 Archives - Page 4 of 7 - Esters-buliding-blocks

Xu, Huaide’s team published research in Xibei Zhiwu Xuebao in 27 | CAS: 110-34-9

Xibei Zhiwu Xuebao published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C6H8N2O2S, SDS of cas: 110-34-9.

Xu, Huaide published the artcileChanges of aroma components in chaenomeles sinensis fruits during storage, SDS of cas: 110-34-9, the publication is Xibei Zhiwu Xuebao (2007), 27(3), 537-542, database is CAplus.

Aroma components were extracted by distillation and solvent extraction (SDE) at different storage time in Chaenomeles sinensis fruits. According to the anal. of GC-MS, esters and alkenes were increasing along with the storage time, but alcs., ketones and aldehydes were decreasing. At the beginning of the storage, the dominant aroma components in Chaenomeles sinensis fruits were 4-Methyl-5-penta-1,3-dienyltetrahydrofuran-2-one, 4-(2,6,6-Trimethylcyclohex-1-enyl)-butan-2-ol and (Z)-3-Hexen-1-ol. After 40 days storage at 8 degrees, the main components and their relative contents were alkenes (21.07%), esters (18.73%) and alcs. (16.34%). After 90 days storage, the relative content of Et esters of aliphatic acids significantly increased to 34.86%, among which the critical one was 3-Nonenoic acid, Et ester (21.67%). In addition, the relative content of α-Farnesene increased from 3.63% at the beginning of the storage to 35.22% after 90 days storage.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Knothe, Gerhard’s team published research in Fuel in 82 | CAS: 110-34-9

Fuel published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C20H40O2, Quality Control of 110-34-9.

Knothe, Gerhard published the artcileCetane numbers of branched and straight-chain fatty esters determined in an ignition quality tester, Quality Control of 110-34-9, the publication is Fuel (2003), 82(8), 971-975, database is CAplus.

The cetane number, a widely used diesel fuel quality parameter related to the ignition delay time (and combustion quality) of a fuel, has been applied to alternative diesel fuels such as biodiesel and its components. In this work, the cetane numbers of 29 samples of straight-chain and branched C₁-C₄ esters as well as 2-ethylhexyl esters of various common fatty acids were determined The cetane numbers of these esters are not significantly affected by branching in the alc. moiety. Therefore, branched esters, which improve the cold-flow properties of biodiesel, can be employed without greatly influencing ignition properties compared to the more common Me esters. Unsaturation in the fatty acid chain was again the most significant factor causing lower cetane numbers Cetane numbers were determined in an ignition quality tester (IQT) which is a newly developed, automated rapid method using only small amounts of material. The IQT is as applicable to biodiesel and its components as previous cetane-testing methods.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Sern, Cheah Han’s team published research in Journal of Oil Palm Research in 20 | CAS: 110-34-9

Journal of Oil Palm Research published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C14H19NO8, COA of Formula: C20H40O2.

Sern, Cheah Han published the artcileSynthesis of palmitic acid-based esters and their effect on the pour point of palm oil methyl esters, COA of Formula: C20H40O2, the publication is Journal of Oil Palm Research (2008), 542-547, database is CAplus.

The objectives of this research were to synthesis palmitic acid-based esters and to study their effects on the pour point of palm oil Me esters. Palmitic acid was esterified with six different branched-chain alcs., namely 2-propanol, 2-butanol, 2-ethyl-1-hexanol, 2-methyl-1-butanol, 2-methyl-1-propanol and 2,2-dimethylpropane-1,3-diol. The purified products were characterized by FT-IR, ¹H-NMR and ¹³C-NMR. The effect of the six synthesized palmitic acid-based esters on palm oil Me esters (biodiesel) was later evaluated. The compounds under study were iso-Pr palmitate (1), sec-Bu palmitate (2), 2-ethylhexyl palmitate (3), 2-methylbutyl palmitate (4), iso-Bu palmitate (5) and 2,2-dimethylpropane-1,3-diyl daipalmitate (6). All of the synthesized compounds were miscible in palm oil Me esters due to similar polarity of the solute and the biodiesel. The blends of the resultant six ester compounds in palm oil Me esters were evaluated resp. for their effect on pour point property. The 2,2-dimethylpropane-1,3-diyl dipalmitate was able to improve the pour point of palm oil Me esters from 12°C to 9°C when 5 wt % was added.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Villa, C.’s team published research in Green Chemistry in 5 | CAS: 110-34-9

Green Chemistry published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C22H18O2, Computed Properties of 110-34-9.

Villa, C. published the artcileSolvent-free reactions as green chemistry procedures for the synthesis of cosmetic fatty esters, Computed Properties of 110-34-9, the publication is Green Chemistry (2003), 5(5), 623-626, database is CAplus.

Solid-liquid solvent-free phase transfer catalysis (PTC) and acidic catalysis in dry media were applied, as green chem. procedures, to the synthesis under mild conditions of long chain aliphatic esters of interest in the cosmetic field. The reactions were performed under conventional heating and microwave activation, analyzing the profiles of the temperature increases during the reactions and studying the yields at different reaction times. The selected esters were obtained with very good yields within short reaction times. Using Aliquat 336 as phase transfer agent, the results showed lower yields under classical heating for very short reaction times (5 min), but usually comparable to the yields obtained under microwave heating extending the reaction time up to 15 min. The simple heterogeneous mixture of reagents with catalytic amount of neat p-toluenesulfonic acid (PTSA) under classical heating leads to good results, similar to those obtained under microwave activation with regards to yields and reaction times (10 min for microwave activation/15 min for oil bath).

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Wan, Yiqian’s team published research in Redai Haiyang in 16 | CAS: 110-34-9

Redai Haiyang published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C7H11N, Quality Control of 110-34-9.

Wan, Yiqian published the artcileChemical studies on soft coral Lobophytum catelai. II., Quality Control of 110-34-9, the publication is Redai Haiyang (1997), 16(3), 78-82, database is CAplus.

The chem. constituents of the soft coral Lobophytum catelai collected from Xisha Islands were studied by spectroscopies and GC/MS. Eight compounds were isolated and identified, which were palmitic acid, iso-Bu palmicate, Bu alc., Pr palmitate, 2,3-dihydroxypropyloctadecaicate, 2β,3β-epoxy-5α-androsta-17-ol, 14-methyl-5α-cholesta-8-ene-3-one, and 2α,3α-epoxy-5α-androsta- 17-β-ol.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Nan, Lijun’s team published research in Scientia Horticulturae (Amsterdam, Netherlands) in 162 | CAS: 110-34-9

Scientia Horticulturae (Amsterdam, Netherlands) published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C20H40O2, Formula: C20H40O2.

Nan, Lijun published the artcileEffect of alternative new pruning system and harvesting times on aroma compounds of young wines from Ecolly (Vitis vinifera) in a new grape growing region of the Weibei Plateau in China, Formula: C20H40O2, the publication is Scientia Horticulturae (Amsterdam, Netherlands) (2013), 181-187, database is CAplus.

Each training system affecting the volatile concentration of wine is closely related to the specific growing conditions of grape. The aim of this work is to evaluate the influence of different training systems, such as crawled cordon training (CCT) and independent long-stem pruning (ILSP), on the volatile composition of Ecolly wine in Weibei Plateau region in three periods (July 31, August 10 and 24). Total aroma concentration (271.15 mg L^-1) and Et octanoate concentration (84.60 mg L^-1) were the highest for ILSP in August 24 in aroma compounds However, total aroma concentration of CCT exceeded the ILSP in July 31 and August 10, resp. ILSP could lead to higher acetate esters compared with CCT except for August 10. Ethanol esters were also strongly influenced by training systems in July 31 (CCT > ILSP) and August 24 (ILSP > CCT), except for slight influence in August 10. But other esters were not strongly impacted by training system. Despite the highest higher alcs. in ILSP in August 24, CCT still displayed significant higher concentration in the first two harvesting times than ILSP. Organic acids showed the same trend as higher alcs. in the experiment Odor activity values (OAVs) of the 16 aromas compounds showed similar results. Results have shown that CCT improved the accumulation of aroma compounds in early wine, if harvesting time need to be postponed, ILSP was also a suitable select. Whereas, a strongly suggestion of CCT was made because stabilization of yield and quality could be guaranteed by CCT annually.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Nan, Lijun’s team published research in Scientia Horticulturae (Amsterdam, Netherlands) in 162 | CAS: 110-34-9

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Nan, Lijun’s team published research in Scientia Horticulturae (Amsterdam, Netherlands) in 162 | CAS: 110-34-9

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Fraile, Jose M.’s team published research in Applied Catalysis, A: General in 387 | CAS: 110-34-9

Applied Catalysis, A: General published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C20H40O2, HPLC of Formula: 110-34-9.

Fraile, Jose M. published the artcileThe basicity of mixed oxides and the influence of alkaline metals: The case of transesterification reactions, HPLC of Formula: 110-34-9, the publication is Applied Catalysis, A: General (2010), 387(1-2), 67-74, database is CAplus.

Several M(II)/M(III) mixed oxides were prepared and tested in two different transesterification reactions, biodiesel production from sunflower oil and methanol, and the more demanding transesterification of Me palmitate with isobutanol. The presence of residual alk. ions after crystallization is the main source for the strong basicity in this kind of solids, as it happened with Mg/Al mixed oxides. The effect of these alk. traces is more evident with the most demanding reaction, in which the alk.-free solids did not show any catalytic activity. These results seem to indicate that the strong basicity in mixed oxides is always connected to the presence of alk. metals, irresp. from the nature of M(II) and M(III).

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Fraile, Jose M.’s team published research in Applied Catalysis, A: General in 364 | CAS: 110-34-9

Fraile, Jose M. published the artcileThe influence of alkaline metals on the strong basicity of Mg-Al mixed oxides: The case of transesterification reactions, Quality Control of 110-34-9, the publication is Applied Catalysis, A: General (2009), 364(1-2), 87-94, database is CAplus.

Several Mg/Al mixed oxides, prepared by three different co-precipitation procedures, have been tested in different transesterification reactions. The catalytic activity for sunflower oil transesterification correlates with the leachable basicity, and not with the total basicity, measured by titration methods. The presence of residual alk. ions after crystallization is the main source for the strong basicity in this kind of solids, and the difficulty in the complete elimination of the alk. traces are probably the origin of the strong discrepancies in basicity detected along the literature data. The effect of these alk. traces is more evident with a more demanding reaction, such as that of Me palmitate with isobutanol. In such case the alk.-free solids did not show any catalytic activity. The nature of these strong basic sites makes the recovery problematic, given that part of the alk. cation is lost to the reaction medium, a process favored by an increase in the polarity of the medium. This fact is also a general limitation for the application of this kind of solids to liquid phase reactions requiring high basicity.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics