Tag: 200-300

Design and Synthesis of Sebacic Acid from Castor Oil by New Alternate Route was written by Bhukya, Gandhi;Kaki, Shiva Shanker. And the article was included in European Journal of Lipid Science and Technology in 2022.HPLC of Formula: 106-79-6 This article mentions the following:

A simple and alternate organic synthetic route for sebacic acid, a high value ten-carbon aliphatic dicarboxylic acid from castor oil is described in this study. Castor oil Me esters are purified to obtain Me ester of ricinoleic acid that is used as the starting material for the preparation of sebacic acid. The hydroxyl group of Me ricinoleate is oxidized to corresponding 12-oxo derivative followed by isomerization of the cis 9, 10 olefinic bond to trans 10, 11 isomer. The isomerized compound is subjected to dihydroxylation followed by oxidative cleavage and subsequent methylation to obtain di-Me decanedioate. The di-Me decanedioate is finally hydrolyzed to obtain sebacic acid. The intermediate compounds and final product are purified and characterized by chromatog. and spectral anal. The final compound is analyzed by ¹H and ¹³C-NMR as well as high resolution mass spectrometry and compared with standard compound for the confirmation of the structure. Practical Applications: The design and preparation of sebacic acid by the novel alternate route is described. Castor oil, a renewable source, is utilized as the raw material for the preparation of sebacic acid. Isomerization of the 9, 10 cis bond to 10, 11 trans bond is the key step in the synthesis of sebacic acid. The chem. transformation of castor oil to sebacic acid by newer route is investigated. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6HPLC of Formula: 106-79-6).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.HPLC of Formula: 106-79-6

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Green nanopriming: responses of alfalfa (Medicago sativa L.) seedlings to alfalfa extracts capped and light-induced silver nanoparticles was written by Song, Kexiao;Zhao, Donghao;Sun, Haoyang;Gao, Jinzhu;Li, Shuo;Hu, Tianming;He, Xueqing. And the article was included in BMC Plant Biology in 2022.Quality Control of Dimethyl decanedioate This article mentions the following:

The application of nanotechnol. in agriculture can remarkably improve the cultivation and growth of crop plants. Many studies showed that nanoparticles (NPs) made plants grow more vigorously. Light can make NPs aggregated, leading to the reduction of the NPs toxicity. In addition, treatment with NPs had a quothormesis effectquot on plants. In this study, light-induced silver nanoparticles (AgNPs) were synthesized by using the alfalfa (Medicago sativa L.) extracts, and then the optimal synthetic condition was determined Light-induced AgNPs were aggregated, spherical and pink, and they were coated with esters, phenols, acids, terpenes, amino acids and sugars, which were the compositions of alfalfa extracts The concentration of free Ag⁺ was less than 2% of the AgNPs concentration Through nanopriming, Ag⁺ got into the seedlings and caused the impact of AgNPs on alfalfa. Compared with the control group, low concentration of light-induced AgNPs had a pos. effect on the photosynthesis. It was also harmless to the leaf cells, and there was no elongation effect on shoots. Although high concentration of AgNPs was especially beneficial to root elongation, it had a slight toxic effect on seedlings due to the accumulation of silver. With the increase of AgNPs concentration, the content of silver in the seedlings increased and the silver enriched in plants was at the mg/kg level. Just as available research reported the toxicity of NPs can be reduced by using suitable synthesis and application methods, the present light induction, active material encapsulation and nanopriming minimized the toxicity of AgNPs to plants, enhancing the antioxidant enzyme system. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Quality Control of Dimethyl decanedioate).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Quality Control of Dimethyl decanedioate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Condensation of γ-chloro esters of methylcyclohexane with dialkyl malonates was written by Gadzhiev, M. M.;Alieva, F. Dzh.;Guseinova, R. A.;Aliev, S. A.;Mamedova, S. G.. And the article was included in Kimya Problemlari in 2008.Related Products of 1190-39-2 This article mentions the following:

New mixed esters on the basis of γ-chloro esters of 1-methylcyclohexane and dialkyl esters of malonic acid were synthesized. It was shown that newly synthesized compounds can be used as plasticizers for polyvinyl chloride linoleum for partial substitution of deficient dioctyl phthalate. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Related Products of 1190-39-2).

malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Related Products of 1190-39-2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Group transfer reactions using N-aroylbenzotriazoles was written by Karnik, A. V.;Yasmeen, A. S. Kadiri. And the article was included in Indian Journal of Heterocyclic Chemistry in 2004.Computed Properties of C12H14O3 This article mentions the following:

N-Aroylbenzotriazoles (Ar = Ph, 3-MeC₆H₄, 2-ClC₆H₄, 3-O₂NC₆H₄) have been successfully used to transfer the aroyl group to the enolates of Et acetoacetate and acetylacetone. The intermediate products, namely Et aroylacetoacetate and aroylacetylacetone, undergo in situ hydrolysis to give the corresponding keto esters and β-diketones ArCOCH₂COR (R = Me, EtO). In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Computed Properties of C12H14O3).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Computed Properties of C12H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

The synthesis of heterogeneous 7-amino-1-naphthalene sulfonic acid immobilized silica nanoparticles and its catalytic activity was written by Adam, Farook;Hello, Kasim Mohammed;Ben Aisha, Maysun Ramadan. And the article was included in Journal of the Taiwan Institute of Chemical Engineers in 2011.Category: esters-buliding-blocks This article mentions the following:

7-Amino-1-naphthalene sulfonic acid (ANSA) was immobilized onto silica via a simple sol-gel technique to form strong Bronsted acid site, RHANPSO₃H. Spherical nano sized catalyst particles were obtained in this study. The ²⁹Si MAS NMR showed the presence of T³, T², Q³ and Q⁴ silicon centers. The ¹³C MAS NMR anal. showed the presence of three chem. shifts consistent with the three carbon atoms of the Pr group. Chem. shifts in the range 122.2-138.9 ppm indicate the presence of the naphthalene ring. The catalytic performance of RHANPSO₃H was tested in the esterification of Bu alc. with different mono and di-acids at 117 °C with 88% conversion of resp. alcs. and 100% selectivity towards the ester. The catalyst could be regenerated by washing with ethanol and drying at 180 °C for 24 h. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Category: esters-buliding-blocks).

malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Category: esters-buliding-blocks

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Multiple Stimuli-Responsiveness Fluorescent Probe Derived from Cyclopolymers and Pyrene-Ended Ammonium Salts was written by Wang, Songmeng;Yang, Yi;Shi, Xiaoyu;Liu, Lingyan;Chang, Weixing;Li, Jing. And the article was included in ACS Applied Polymer Materials in 2020.Product Details of 27249-90-7 This article mentions the following:

A multiple stimuli-responsiveness fluorescent probe was fabricated by host-guest recognition between cyclopolymers with larger pseudo crown ether cavities in backbones and pyrene-ended ammonium salts. And this fluorescent probe exhibits ratiometric responsiveness to chloride anion, organic base, and temperature, as well as a dual luminescence responsiveness to nitro-compounds These properties of this probe endow it with potential application in multiple stimuli-responsive chem. fluorescent sensors. Moreover, it was found that the cyclopolymers with pyrenes grafted on the backbone increased excimer/monomer emission ratio of the fluorescent polypseudorotaxane, which would be expected to present higher sensitivity and responsiveness to external environment or stimuli-factors. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Product Details of 27249-90-7).

Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Product Details of 27249-90-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

A Convenient Synthesis of 2-Fluoro- and 2-Chloromalonic Esters Mediated by Hypervalent Iodine was written by Kitamura, Tsugio;Muta, Kensuke;Oyamada, Juzo. And the article was included in Synthesis in 2015.Safety of malonic acid dibutyl ester This article mentions the following:

Direct fluorination of malonic esters with a reagent system of iodosylbenzene and Et₃N·5HF gave the corresponding 2-fluoromalonic esters in good to high yields. Direct chlorination using iodosylbenzene and hydrochloric acid also provided the 2-chloromalonates in high yields. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Safety of malonic acid dibutyl ester).

malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Safety of malonic acid dibutyl ester

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Controlling Polymer Composition in Organocatalyzed Photoredox Radical Ring-Opening Polymerization of Vinylcyclopropanes was written by Chen, Dian-Feng;Boyle, Bret M.;McCarthy, Blaine G.;Lim, Chern-Hooi;Miyake, Garret M.. And the article was included in Journal of the American Chemical Society in 2019.Safety of malonic acid dibutyl ester This article mentions the following:

Although radical polymerizations are among the most prevalent methodologies for the synthesis of polymers with diverse compositions and properties, the intrinsic reactivity and selectivity of radical addition challenge the ability to impart control over the polymerization propagation and produce polymers with defined microstructure. Vinylcyclopropanes (VCPs) can be polymerized through radical ring-opening polymerization to produce polymers possessing linear (l) or cyclic (c) repeat units, providing the opportunity to control polymer structure and modify the polymer properties. Herein, we report the first organocatalyzed photoredox radical ring-opening polymerization of a variety of functionalized VCP monomers, where high monomer conversions and spatial and temporal control were achieved to produce poly(VCPs) with predictable mol. weight and low dispersity. Through manipulating polymerization concentration and temperature, tunable l or c content was realized, allowing further investigation of thermal and viscoelastic materials properties associated with these two distinct compositions Unexpectedly, the photoredox catalysis enables a postpolymn. modification that converts l content into the c content. Combined exptl. and computational studies suggested an intramol. radical cyclization pathway, where cyclopentane and cyclohexane repeat units are likely formed. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Safety of malonic acid dibutyl ester).

malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Safety of malonic acid dibutyl ester

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Regioselective synthesis of 2,3,4- or 2,3,5-trisubstituted pyrroles via [3,3] or [1,3] rearrangements of O-vinyl oximes was written by Wang, Heng-Yen;Mueller, Daniel S.;Sachwani, Rachna M.;Kapadia, Rachel;Londino, Hannah N.;Anderson, Laura L.. And the article was included in Journal of Organic Chemistry in 2011.Name: Ethyl 3-oxo-3-(m-tolyl)propanoate This article mentions the following:

The regioselective synthesis of 2,3,4- or 2,3,5-trisubstituted pyrroles e. g., I has been achieved via [3,3] and [1,3] sigmatropic rearrangements of O-vinyl oximes, resp. Iridium-catalyzed isomerization of easily prepared O-allyl oximes enables rapid access to O-vinyl oximes. Optimization and scope of the O-allyl oxime isomerization and subsequent pyrrole formation are discussed and mechanistic pathways are proposed. The regioselectivity of pyrrole formation can be controlled by either the identity of the α-substituent or through the addition of an amine base. When enolization is favored, a [3,3] rearrangement followed by a Paal-Knorr cyclization provides a 2,3,4-trisubstituted pyrrole; when enolization is disfavored, a [1,3] rearrangement occurs prior to enolization to produce a 2,3,5-trisubstituted pyrrole after cyclization. Conditions are provided for selecting either the [3,3] rearrangement or the [1,3] rearrangement product with β-ester O-allyl oxime substrates. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Name: Ethyl 3-oxo-3-(m-tolyl)propanoate).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Name: Ethyl 3-oxo-3-(m-tolyl)propanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Polymerization of an activated ester monomer based on 4-vinylsulfonic acid and its polymer analogous reaction was written by Nilles, Katja;Theato, Patrick. And the article was included in Polymer Chemistry in 2011.Related Products of 27249-90-7 This article mentions the following:

Homopolymers containing sulfonic ester side groups were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization utilizing benzyl dithiobenzoate, cumyl dithiobenzoate, and 4-cyano-4-((thiobenzoyl)sulfanyl)pentanoic acid as chain transfer agents. Likewise diblock copolymers containing poly(styrene), poly(octylstyrene) and poly(pentafluorostyrene) as the second block were synthesized. Addnl., nitroxide mediated polymerization (NMP) was investigated for the synthesis of a homopolymer as well as for a diblock copolymer. Furthermore, the post-polymerization functionalization with various amines to yield the resp. sulfonamides was conducted. The conversion was analyzed by ¹H NMR spectroscopy, ¹⁹F NMR spectroscopy and FT-IR spectroscopy and in many cases a very high conversion (>96%) was observed In addition the reaction kinetics of the post-polymerization functionalization of poly(pentafluorophenyl 4-vinylbenzene sulfonate) and the corresponding carboxyl ester poly(pentafluorophenyl 4-vinylbenzoate) were compared by anal. of the reactions by time-resolved ¹⁹F NMR spectroscopy. It was found that poly(pentafluorophenyl 4-vinylbenzoate) showed a higher stability towards hydrolysis and a significantly higher reactivity, resulting in complete conversions with different amines. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Related Products of 27249-90-7).

Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Related Products of 27249-90-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics