Month: November 2022

Effect of Ionic Liquid Treatment on Pyrolysis Products from Bamboo was written by Muhammad, Nawshad;Omar, Wissam N.;Man, Zakaria;Bustam, Mohamad Azmi;Rafiq, Sikander;Uemura, Yoshimitsu. And the article was included in Industrial & Engineering Chemistry Research in 2012.SDS of cas: 5444-75-7 The following contents are mentioned in the article:

In the present work 1-butyl-3-methylimidazolium chloride (BmimCl) and 1-butyl-3-methylimidazolium acetate (BmimOAc) ionic liquids were used for the dissolution of bamboo biomass. After dissolution the treated samples were precipitated by using H₂O. The calorific value, CHNS content, lignin content, and proximate anal. of the untreated and precipitated material were measured. The BmimCl-treated sample has a higher value for calorific value, elemental percentage of C, and lignin content as well as fixed C, compared to the untreated and BmimOAc treated samples. The untreated and ionic liquid treated samples were also characterized by TGA and XRD. Low thermal stability and change in crystalline form from cellulose Type I to Type II have been observed by the dissolution and precipitation treatment. Pyrolysis-gas chromatog./mass spectrometry (Py-GC/MS) was employed to achieve fast pyrolysis of the untreated and ionic liquid treated samples of bamboo. The desirable products with respect to bio-oil, such as phenols, furans, alcs., hydrocarbons, and aromatics are increased, while the undesirable products such as aldehydes and ketones, except for total acids, are decreased for the BmimCl treated sample. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7SDS of cas: 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) 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.SDS of cas: 5444-75-7

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

High molecular weight multifunctional fluorescent polyurea: Isocyanate-free fast synthesis, coating applications and photoluminescence studies was written by Kumari, Sulbha;Avais, Mohd;Chattopadhyay, Subrata. And the article was included in Polymer in 2022.Synthetic Route of C13H10O3 The following contents are mentioned in the article:

Isocyanate-free synthesis of high mol. weight polyurea (PUrea) is a challenging and important area of research, considering the health and safety concerns related to isocyanates and a wide range of day-to-day uses of polyurea. In this article, an isocyanate and phosgene-free synthesis of high mol. weight fluorescent polyurea (Mn > 150,000) is reported via triazolinedione (TAD)-indole click reactions. Both the bisTAD and bis-indole monomers are synthesized from di-Ph carbonate using solvent-free reactions. The synthesis of polyurea is finished within 15 min under ambient conditions, without the use of any additives and catalysts, which is a remarkable advantage in comparison to all other reported methods in the literature. The mol. weight (Mn) of the polyurea can be defined as either very high mol. weight >150,000 g/mol or low mol. weight ∼ 3500-4000 g/mol via choosing a suitable solvent for the polymerization reaction. This approach is also useful for polyurea-based hydrophobic coatings as evidenced by the water contact angle anal. The indole-derived aromatic moieties introduced within the polymer backbone; impart photoluminescence properties and polymers show excitation-dependent emission behavior. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Synthetic Route of C13H10O3).

Diphenyl carbonate (cas: 102-09-0) 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.Synthetic Route of C13H10O3

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

Studies on the reuse of recovered ethanol from benoral refining in natural medicinal chemistry experiments was written by Yuan, Chunling;Jia, Yunhong;Wang, Yajuan. And the article was included in Liaoning Yixueyuan Xuebao in 2012.Application of 5003-48-5 The following contents are mentioned in the article:

Objective: To study the reused of recovered ethanol that has been used in refining of benoral in natural medicinal chem. experiments Methods: Vacuum distillation of waste ethanol was used in the refining of benoral. 100 G crude rhubarb powder was weighted, 300 mL ethanol was extracted by heat reflux, and TLC was used to identify the extracted and separated anthraquinone glycosides. Results: Rf values between the spot evolved resp. by extraction I extracted by various proportion ethanol and the spot of standard reagent rhein were the same, Rf values between the spot evolved resp. by extraction II extracted by various proportion ethanol and the spot of standard reagent emodin were the same. Evolved extraction III had two spots resp., Rf values between one spot and of standard reagent chrysophanol were the same. The other spot’s Rf value and the spot of standard reagent physcion’s Rf value were the same, which preliminarily confirmed that there was rhein in the extraction I, emodin in the extraction II, chrysophanol and physcion in the extraction III, and there was no impurity spot. Conclusion: The recovery of waste ethanol used in the refining of benoral can be used in extraction of Anthraquinone glycosides. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Application of 5003-48-5).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) 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. 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. Application of 5003-48-5

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

Multifunctional gluten/guar gum copolymer with self-adhesion, self-healing, and remolding properties as smart strain sensor and self-powered device was written by Ounkaew, Artjima;Kasemsiri, Pornnapa;Srichiangsa, Natnaree;Jetsrisuparb, Kaewta;Knijnenburg, Jesper T. N.;Okhawilai, Manunya;Hiziroglu, Salim;Theerakulpisut, Somnuk. And the article was included in eXPRESS Polymer Letters in 2022.Quality Control of Glyceryl monostearate The following contents are mentioned in the article:

In this research, a multifunctional strain sensor based on gluten/guar gum (GG) copolymer was developed. The effects of gluten/GG blended ratios on the mech. and elec. properties, self-adhesion, self-healing, remolding, self-powered and long-term stability of the strain sensors were studied. Among tested substrates, the gluten/GG blend indicated a strong adhesion to wood and paper substrates and showed a maximum adhesive strength at 1.5 wt% of GG in the copolymer (gluten/GG-1.5%). The adhesive strength of gluten/GG-1.5% decreased in the acceptable range when it was applied in 10 repeated adhesion cycles. The gluten/GG-1.5% exhibited a high elec. conductivity of 0.12 S/m and stretchability of 465%. The gluten/GG-based sensor containing glycerol showed long-term stability of self-healing, remolding, and self-powered ability when stored for 7 days, whereas the self-adhesive ability decreased with increasing storage time. The self-adhesive gluten/GG-1.5% was used to monitor human limb movements, which showed remarkable sensitivity during the storage time of 3 days. Such properties suggested a potential use of smart strain sensors with multifunctional capabilities for applications in wearable electronic devices. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Quality Control of Glyceryl monostearate).

Glyceryl monostearate (cas: 31566-31-1) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. 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.Quality Control of Glyceryl monostearate

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

Effect of mixed yeasts on the waste lees liquor quality of Nongxiangxing baijiu was written by Zhang, Hai-ying;Zhou, Rui-ping;Fan, Yi-ling;Luo, Ming-you;Deng, Jie;You, Ling. And the article was included in Anhui Nongye Kexue in 2022.Product Details of 2198-61-0 The following contents are mentioned in the article:

[Objective] To explore the effect of mixed yeasts on the waste lees liquor quality of Nongxiangxing Baijiu. [Method] The two yeast strains Z8Y-15 and S633Y-28-1 isolated from Nongxiangxing Baijiu brewing environment were inoculated in distillers’ grains and fermented for 40 days in pits. Then the contents of main components and aroma flavor-producing substances in fermented grains were detected. [Result] The result showed that the saccharifying power of mixture by two different yeast stains are more effective than a single tested stain or blank control group (P<0.01), along with the average alc. production was 8460.27 mg/L, which was 35.88% higher than that of the control group. These characteristics significantly improved the yield of wine. Meanwhile, the mixed yeasts could significantly reduce the contents of n-butanol and benzyl alc. in the waste distiller’s grains (P<0.05), increase the contents of isoamyl hexanoate (P<0.05), β-phenylethanol and Et butyrate (P<0.01). Thus the waste lees liquor body could change to be milder, and the flavor of waste lees liquor was more harmonious. [Conclusion] This study may shed light on the prospect of mixed yeasts in the future waste lees liquor production This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Product Details of 2198-61-0).

Isopentyl hexanoate (cas: 2198-61-0) 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. 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.Product Details of 2198-61-0

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

Design and synthesis of novel androgen receptor antagonists via molecular modeling was written by Zhao, Chao;Choi, You Hee;Khadka, Daulat Bikram;Jin, Yifeng;Lee, Kwang-Youl;Cho, Won-Jea. And the article was included in Bioorganic & Medicinal Chemistry in 2016.Recommanded Product: Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

Several androgen receptor (AR) antagonists are clin. prescribed to treat prostate cancer. Unfortunately, many patients become resistant to the existing AR antagonists. To overcome this, a novel AR antagonist candidate called DIMN was discovered by our research group in 2013. In order to develop compounds with improved potency, we designed novel DIMN derivatives based on a docking study and substituted carbons with heteroatom moieties. Encouraging in vitro results for compounds 1b, 1c, 1e, 3c, and 4c proved that the new design was successful. Among the newly synthesized compounds, 1e exhibited the strongest inhibitory effect on LNCaP cell growth (IC₅₀ = 0.35 μM) and also acted as a competitive AR antagonist with selectivity over the estrogen receptor (ER) and the glucocorticoid receptor (GR). A docking study of compound 1e fully supported these biol. results. Compound 1e is considered to be a novel, potent and AR-specific antagonist for treating prostate cancer. Thus, our study successfully applied mol. modeling and bioisosteric replacement for hit optimization. The methods here provide a guide for future development of drug candidates through structure-based drug discovery and chem. modifications. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Recommanded Product: Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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. Recommanded Product: Ethyl 3-ethoxypropanoate

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

Evaluation of glycolamide esters and various other esters of aspirin as true aspirin prodrugs was written by Moerk Nielsen, Niels;Bundgaard, Hans. And the article was included in Journal of Medicinal Chemistry in 1989.COA of Formula: C17H15NO5 The following contents are mentioned in the article:

A series of glycolamide, glycolate, (acyloxy)methyl, alkyl, and aryl esters of aspirin) were synthesized and evaluated as potential prodrug forms of aspirin, N,N-disubstituted glycolamide esters were rapidly hydrolyzed in human plasma, resulting in the formation of aspirin as well as the corresponding salicylate esters. These in turn hydrolyzed rapidly to salicylic acid. The largest amount of aspirin formed from the esters were 50 and 55% in case of the N,N-dimethyl- and N,N-diethylglycolamide esters, resp. Similar results were obtained in blood with the N,N-dimethyl- and N,N-diethylglycolamide esters. Unsubstituted and monosubstituted glycolamide esters as well as most other esters previously suggested to be aspirin prodrugs hydrolyzed exclusively to the corresponding salicylic acid esters. Lipophilicity parameters and water solubilities of the esters were determined, and structural factors favoring ester prodrug hydrolysis at the expense of deacetylation to yield salicylate ester are discussed. The properties of some N,N-disubstituted glycolamide esters of aspirin are highlighted with respect to their use as potential aspirin prodrugs. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5COA of Formula: C17H15NO5).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) 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. 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.COA of Formula: C17H15NO5

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

Characteristics and chemical compositions of propolis from Ethiopia was written by Rushdi, Ahmed I.;Adgaba, Nuru;Bayaqoob, Noofal I. M.;Al-Khazim, Ahmed;Simoneit, Bernd R. T.;El-Mubarak, Aarif H.;Al-Mutlaq, Khalid F.. And the article was included in SpringerPlus in 2014.Recommanded Product: 1731-94-8 The following contents are mentioned in the article:

Introduction: Propolis is a sticky material mixed by honeybees to utilize it in protecting their hives from infection by bacteria and fungi. The therapeutic properties of propolis are due to its chem. composition with bio-active compounds; therefore, researchers are interested in studying its chem. constituents and biol. properties. The main objective of this study is to determine the chem. compositions, characteristics and relative concentrations of organic compounds in the extractable organic matter of propolis samples collected from four different areas in Ethiopia. Results: The propolis samples were extracted with a mixture of dichloromethane and methanol and analyzed by gas chromatog.-mass spectrometry (GC-MS).The results showed that the total extract yields ranged from 27.2% to 64.2% (46.7 ± 19.1%). The major compounds were triterpenoids (85.5 ± 15.0% of the total extracts, mainly α-, β-amyrins and amyryl acetates), n-alkanes (5.8 ± 7.5%), n-alkenes (6.2 ± 7.0%,), Me n-alkanoates (0.4 ± 0.2%), and long chain wax esters (0.3 to 2.1%). Conclusion: The chem. compositions of these propolis samples indicate that they are potential sources of natural bio-active compounds for biol. and pharmacol. applications. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Recommanded Product: 1731-94-8).

Methyl nonadecanoate (cas: 1731-94-8) 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. 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. Recommanded Product: 1731-94-8

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

Design, Synthesis, biological investigations and molecular interactions of triazole linked tacrine glycoconjugates as Acetylcholinesterase inhibitors with reduced hepatotoxicity was written by Kaur Gulati, Harmandeep;Choudhary, Sushil;Kumar, Nitish;Ahmed, Ajaz;Bhagat, Kavita;Vir Singh, Jatinder;Singh, Atamjit;Kumar, Ajay;Singh Bedi, Preet Mohinder;Singh, Harbinder;Mukherjee, Debaraj. And the article was included in Bioorganic Chemistry in 2022.Quality Control of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate The following contents are mentioned in the article:

Tacrine is a known Acetylcholinesterase (AChE) inhibitors having hepatotoxicity as main liability associated with it. The present study aims to reduce its hepatotoxicity by synthesizing tacrine linked triazole glycoconjugates via Huisgen’s [3 + 2] cycloaddition of anomeric azides and terminal acetylenes derived from tacrine. A series of triazole based glycoconjugates containing both acetylated, e.g. I, and free sugar hydroxyl groups at the amino position of tacrine were synthesized in good yield taking aid from mol. docking studies and evaluated for their in vitro AChE inhibition activity as well as hepatotoxicity. All the hybrids were found to be non-toxic on HePG2 cell line at 200μM (100% cell viability) as compared to tacrine (35% cell viability) after 24 h of incubation period. Enzyme kinetic studies carried out for one of the potent hybrids in the series I (IC₅₀ 0.4μM) revealed its mixed inhibition approach. Thus, compound I can be used as principle template to further explore the mechanism of action of different targets involved in Alzheimer’s disease (AD) which stands as an adequate chem. probe to be launched in an AD drug discovery program. This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3Quality Control of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) 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. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Quality Control of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate

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

Discrimination of Malaysian stingless bee honey from different entomological origins based on physicochemical properties and volatile compound profiles using chemometrics and machine learning was written by Sharin, Siti Nurhidayah;Sani, Muhamad Shirwan Abdullah;Jaafar, Mohd Azwan;Yuswan, Mohd Hafis;Kassim, Nur Kartinee;Manaf, Yanty Noorzianna;Wasoh, Helmi;Zaki, Nor Nadiha Mohd;Hashim, Amalia Mohd. And the article was included in Food Chemistry in 2021.Reference of 112-14-1 The following contents are mentioned in the article:

Identification of honey origin based on specific chem. markers is important for honey authentication. This study is aimed to differentiate Malaysian stingless bee honey from different entomol. origins (Heterotrigona bakeri, Geniotrigona thoracica and Tetrigona binghami) based on physicochem. properties (pH, moisture content, ash, total soluble solid and elec. conductivity) and volatile compound profiles. The discrimination pattern of 75 honey samples was observed using Principal Component Anal. (PCA), Hierarchical Clustering Anal. (HCA), Partial Least Square-Discriminant Anal. (PLS-DA), and Support Vector Machine (SVM). The profiles of H. bakeri and G. thoracica honey were close to each other, but clearly separated from T. binghami honey, consistent with their phylogenetic relationship. T. binghami honey is marked by significantly higher elec. conductivity, moisture and ash content, and high abundance of 2,6,6-trimethyl-1-cyclohexene-1-carboxaldehyde, 2,6,6-trimethyl-1-cyclohexene-1-acetaldehyde and Et 2-(5-methyl-5-vinyltetrahydrofuran-2-yl)propan-2-yl carbonate. Copaene was proposed as chem. marker for G. thoracica honey. The potential of different parameters that aid in honey authentication was highlighted. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Reference of 112-14-1).

Octyl acetate (cas: 112-14-1) 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. Polyesters are important plastics, with monomers linked by ester moieties. 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.Reference of 112-14-1

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