Tag: M.W=300-400

In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 123-95-5, name is Butyl stearate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. category: esters-buliding-blocks

An esterification reaction mixture (94 g), consisting of butanol (ca., 4.9% w/w), butyl stearate (95.1% w/w), residual stearic acid (trace), residual methanesulfonic acid catalyst (1383 ppm) and undesired butyl methanesulfonate (613 ppm) was treated with 45% aqueous KOH (229 mg, 1.84 mmol as compared to 1.74 mmol MSA originally charged to the reaction). The resulting mixture was heating at 50 C. for 40 minutes. Without wishing to be bound by any particular theory or explanation, it is believed that reaction of butyl stearate with KOH produced potassium stearate, which retains significant solubility in the butyl stearate medium. The formed potassium stearate then reacted with butyl methanesulfonate to produce potassium methanesulfonate and butyl stearate. After filtration of the by-product solid salts (0.6325 g), analysis of the mixture by gas chromatography revealed only 300 ppm unreacted butyl methanesulfonate, a 51% reduction. Repetition of the above KOH treatment at a higher temperature (175 C./60 min.) revealed complete reaction of the butyl methanesulfonate. Similarly, treatment with NaOH was found equally effective as treatment with KOH. Treatment with Ca(OH)2 proved ineffective, presumably due to formation of poorly soluble calcium salts. Treatment with acidic tin(II) or zirconium (IV) salts resulted in formation of additional butyl methanesulfonate.

The synthetic route of 123-95-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Smith, Gary; Cordova, Robert; Chen, Johnson C.H.; Chen, Mabel; US2006/30725; (2006); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Electric Literature of 18014-00-1,Some common heterocyclic compound, 18014-00-1, name is Dimethyl 2,5-dibromoterephthalate, molecular formula is C10H8Br2O4, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

2.63 g (10 mmol) of octyl (methyl) -aniline-4-boronic acid was dissolved in 30 ml of tetrahydrofuran, Then 2 ml of water was added, 2.12 g (20 mmol) of sodium carbonate, 1.05 g (3 mmol) of dimethyl 2,5-dibromoterephthalate, 120 mg of tetraphenylphosphine palladium, Reaction under nitrogen for 12 hours; After the reaction is completed, Add 20ml of water to extract. Separate the organic phase, The aqueous phase is extracted three times with 20 dichloromethane. The combined organic phase, Drying over anhydrous sodium sulfate. Evaporate the methylene chloride, Column chromatography (petroleum ether: dichloromethane = 5: 1), Obtained as a light yellow solid, As shown in Formula XI.

The synthetic route of 18014-00-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Lanzhou University; Zhang Haoli; Fan Zhiping; Xu Zhuguo; Shi Zifa; (14 pag.)CN105367451; (2017); B;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Application of 18014-00-1, These common heterocyclic compound, 18014-00-1, name is Dimethyl 2,5-dibromoterephthalate, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

210 mg of 4-chlorothiophene boric acid,151 mg of dimethyl 2,5-dibromobenzene-1,4-dicarboxylate,116mg PdCl2(PPh3)2, 434.7mg saturated K2CO3 aqueous solution was placed in a two-port bottle,Add 12 mL of tetrahydrofuran,The mixture was heated and stirred under reflux for 9 hours under argon.After cooling to room temperature, it was extracted with 30 mL of ethyl acetate.The combined organic layers were washed with saturated brine andNa2SO4 is dry.The solution was then filtered and the solvent removed to give a crude material which was crystallised from ethanol.The product was obtained as a yellow solid.

Statistics shows that Dimethyl 2,5-dibromoterephthalate is playing an increasingly important role. we look forward to future research findings about 18014-00-1.

Reference:
Patent; Lanzhou University; Zhang Haoli; Liu Duanwu; Lin Zewei; Xu Zhuguo; Shi Zifa; (13 pag.)CN109678877; (2019); A;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Related Products of 18013-97-3, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 18013-97-3, name is Diethyl 2,5-dibromoterephthalate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

2,5-Dibromo-terephthalic acid diethyl ester (20 g, 53 mmol), dibenzofuran- 1 -boronic acid (29 g, 137 mmol) and tripotassiumphosphate monohydrate (48.5 g, 160 mmol) were added to water/toluene/dioxane (1 :1 :1 , 0.5 L). The solution was saturated with argon. Palladium(ll)-acetate (1 18 mg, 0.5 mmol) and tri-o-tolyl-phosphine (480 mg, 1 .6 mmol) were added and the reaction mixture was refluxed for 16 hours. After cooling down to room temperature, toluene (500 mL) was added and the organic phase was washed with water (3 x 500 mL) and then concentrated under reduced pressure. The residue was purified by recrystallization from toluene/ethanol. Yield: 22.2 g (40 mol; 76 %).

The synthetic route of Diethyl 2,5-dibromoterephthalate has been constantly updated, and we look forward to future research findings.

Reference:
Patent; MERCK PATENT GMBH; LINGE, Rouven; RODRIGUEZ, Lara-Isabel; MEYER, Sebastian; HEIL, Holger; (112 pag.)WO2018/95888; (2018); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 205448-64-2, name is Methyl 4-(((2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ylidene)methyl)amino)-2-methoxybenzoate, A new synthetic method of this compound is introduced below., SDS of cas: 205448-64-2

45 g (292 mmol) of biphenyl was weighed into a three-necked flask, 150 mL of diphenyl ether was added, the solvent was heated to 180 C under nitrogen atmosphere, and 18 g (53.7 mmol) of compound 4 was rapidly added under a nitrogen atmosphere, and a large amount of gas was released. The temperature was maintained at 170 to 185 C, and the reaction was continued for 45 minutes to stop the heating. Cooled to room temperature, a large amount of yellow solid precipitated, added petroleum ether, filtered, filter cakeThe crude product was washed well with diethyl ether.The crude product was purified by petrol-ethyl acetate (5:2 by volume), suction filtered and dried.A yellow solid (5) of 10.11 g was obtained in a yield of 80.7%.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; Nanjing Tian Yue Xing Biological Co., Ltd.; Wu Xueping; Chen Yao; (6 pag.)CN109456267; (2019); A;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 72338-48-8, name is Ethyl 12-bromododecanoate, This compound has unique chemical properties. The synthetic route is as follows., COA of Formula: C14H27BrO2

c) Synthesis of ethyl 13-(diethoxyphosphoryl)tridecanoate In a single-neck flask with a reflux condenser, ethyl 12-bromododecanoate is weighed (1.8 g, 7.37 mmol) and triethyl phosphite (2.6 mL, 15 mmol) is added. The reaction mixture is brought to 150C and left stirring under a static head of nitrogen. After 24 hours the one neck balloon is attached to the high vacuum pump to eliminate volatile products and the resulting dense oil is directly loaded with column chromatography on silica gel. It is eluted with a mixture of ethyl acetate/petroleum ether 1/1 which leads to the isolation of 2.5 g (yield 94%) of ethyl 13-(diethoxyphosphoryl)tridecanoate as a colourless oil.

According to the analysis of related databases, 72338-48-8, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Colorobbia Italia S.p.a.; EP1979365; (2012); B1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 111-61-5, name is Ethyl stearate, A new synthetic method of this compound is introduced below., SDS of cas: 111-61-5

Example 5 Production of Octadecanedioic Acid (?ODDA?) by an Engineered Microorganism (0063) A one milliliter frozen glycerol stock of Candida sp. yeast strain sAA2178 (disclosed in international patent application PCT/US2013/076664) was inoculated into a 500 ml baffled flask containing about 80 ml of SP92 culture medium (described in Example 2 above) under sterile conditions, and the flask was capped with a foam plug and placed on a shaker at 30 C. and 250 rpms for about 24 hours. This culture was used to inoculate three 500 ml baffled flasks containing about 80 ml of SP92 culture medium at a starting optical density of 600 nm of 0.4. The flasks were incubated at 24 hours at about 30 C. and 250 rpm after which the three flasks were combined. This combined culture was divided into three aliquots which were used to inoculate three containing 2.5 L baffled flasks containing SP92 (75 g/L dextrose) and having initial optical density of 600 nm of 2; these flasks were incubated for about 24 hrs at about 30 C. and 250 rpms. (0064) These cultures were used to inoculate about 200 L of 1.5¡ÁKA media (described in Example 2) containing about 40.5 g/L of dextrose in a 300 L working volume stir tank fermenter. The fermenter was kept at about 34 degrees Celsius, agitation was kept at about 400 rpm, the airflow was about 1 VVM and the pH was set at about 5.8 using NaOH as base. Once dextrose was depleted the pH was increased to 6.0, glucose and ethyl-stearate mixture (74% ethy-stearate, 18% stearic acid, 8% methyl stearate) were each fed into the fermenter at about 1.35 g/L-h and 0.9 g/L-h respectively for the duration of the 100 hour fermentation, however from hour 40 through hour 48, the rate of ethyl stearate mixture was increased to 1.8 g/L hr. The resulting broth had a concentration of dodecanedioic acid of about 40 g/L as determined by GC analysis.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; Verdezyne, Inc.; LAPLAZA, Jose; US2015/361024; (2015); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Synthetic Route of 123-95-5, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 123-95-5, Name is Butyl stearate, SMILES is CCCCCCCCCCCCCCCCCC(OCCCC)=O, belongs to esters-buliding-blocks compound. In a article, author is Robert, Rohan Jeffry, introduce new discover of the category.

PRODUCTION OF BIODIESEL FROM PORK LARD WASTE AND CHARACTERIZATION OF ITS PROPERTIES

The present work explores the potential of pork lard waste as a feedstock for the production of biodiesel. The production involved a unique pathway of reaction using Nitric Acid, an acidic catalyst rather than following the conventional method with a basic/alkali catalyst. The catalyst of choice helped the production to achieve maximum conversion of 92% (9.2g biodiesel/10g fat) by converting the undesired cholesterol in the fat to desired long-chain fatty acids. While achieving a high conversion, the amount of alcohol reagent consumed was recorded to be less than that of the conventional method. Soap, a hindering biproduct formed is also ruled out, unlike in the conventional method. The present work also voids out any hindrance in the yield due to FFA (Free Fatty Acids). The influence of operating conditions such as catalyst loading, alcohol to fat ratio, and reaction time were investigated. The presence of cholesterol in the feedstock and esters in the obtained biodiesel was confirmed through Gas Chromatography analysis. Biodiesel obtained was also tested for the physiochemical properties and was compared to that of the respective standards such as ASTM and IS. The results were found out to be matching to that of the standard range. Thus, from the findings of the present work a conclusion was drawn that the biodiesel produced from pork lard waste could be a promising supplementary fuel to the commercial diesel. Moreover, considering the amounts of reagents used, the explored method is more economically feasible compared to the conventional method where a basic catalyst is utilized. The finding from the current work also offers a new methodology to work with high ‘cholesterol-containing’ fats to produce biodiesel.

Synthetic Route of 123-95-5, The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 123-95-5 is helpful to your research.

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 123-95-5, Name is Butyl stearate, molecular formula is C22H44O2. In an article, author is Hong, Frank T.,once mentioned of 123-95-5, SDS of cas: 123-95-5.

Chemical and kinetic insights into fuel lubricity loss of low-sulfur diesel upon the addition of multiple oxygenated compounds

Fatty acid methyl esters (FAMEs, the primary components of biodiesel) can improve the lubricity of low-sulfur diesel (LSD); however, detailed investigations into biodiesel components with various chain lengths (e.g., short-chain FAMEs) are rarely discussed. Additionally, the complex lubricity behavior with FAMEs containing free fatty acids or antioxidants is unknown. Our results showed that lauric acid methyl ester brings limited fuel lubricity improvement to LSD. The presence of fatty acids and antioxidants facilitated the formation of different frictional products on wear tracks or eliminated wear-resistive products. We further interpret fuel lubricity results by resolving kinetic features of measured electrical contact resistances and chemical composition profiles within wear tracks from standardized tests. Beyond understanding how oxygenated compounds affect fuel lubricity, we expect that the analytical approaches demonstrated in this work can shed light on other fuel lubricity related problems.

Interested yet? Keep reading other articles of 123-95-5, you can contact me at any time and look forward to more communication. SDS of cas: 123-95-5.

In an article, author is Schroeder, Carsten, once mentioned the application of 123-95-5, Name is Butyl stearate, molecular formula is C22H44O2, molecular weight is 340.58, MDL number is MFCD00026669, category is esters-buliding-blocks. Now introduce a scientific discovery about this category, SDS of cas: 123-95-5.

Tuning the Strength of Molecular Bonds in Oxygenates via Surface-Assisted Intermolecular Interactions: Atomistic Insights

Lateral interactions between coadsorbed hydrocarbon species play an important role in their chemical transformations on catalytic metal surfaces. In this report, we present a mechanistic study on mutual lateral interactions of the alpha-ketoester ethyl pyruvate adsorbed on a well-defined Pt(111) surface, resulting in a strong weakening of ester bonds. By employing a combination of surface-sensitive spectroscopic and microscopic techniques as well as theoretical calculations, we address the atomistic-level structure of surface assemblies containing several ethyl pyruvate species. We report formation of different types of surface oligomers comprising topologically different dimer, trimer, and tetramer species. Based on a combination of spectroscopic and microscopic observations, all species can be attributed to two large classes of oligomers exhibiting different types of intermolecular bonding. In the first class of species, the intermolecular interaction is realized via H-bonding between two acetyl groups of ethyl pyruvate, that is, a carbonyl and a methyl group of the neighboring molecules, while in the second type of species the bonding interaction involves the ester-O of one molecule and the acetyl group of a neighboring adsorbate. For the latter type of species, a strong IR frequency shift of the ester C-O vibration was observed pointing to a significant weakening of the related ester bonds, which might exert a strong impact on the chemical transformations involving this group. We demonstrate that the particular type of intermolecular interaction in ethyl pyruvate assemblies can be effectively tuned by controlling the adsorption parameters, such as surface coverage and the presence of coadsorbed hydrogen. Obtained results provide important insights into the details of lateral interactions of complex multifunctional molecules adsorbed on catalytically relevant surfaces. We show that the parameter space in a catalytic process involving ester compounds can be purposefully varied to tune the strength of the ester bond toward improving the catalytic performance.

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