Tag: 100-200

On June 30, 2021, Bampidis, Vasileios; Azimonti, Giovanna; Bastos, Maria de Lourdes; Christensen, Henrik; Kouba, Maryline; Fasmon Durjava, Mojca; Lopez-Alonso, Marta; Lopez Puente, Secundino; Marcon, Francesca; Mayo, Baltasar; Pechova, Alena; Petkova, Mariana; Ramos, Fernando; Sanz, Yolanda; Villa, Roberto Edoardo; Woutersen, Ruud; Brantom, Paul; Chesson, Andrew; Westendorf, Johannes; Manini, Paola; Pizzo, Fabiola; Dusemund, Birgit; EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) published an article.Computed Properties of 85-91-6 The title of the article was Safety and efficacy of a feed additive consisting of expressed mandarin oil from the fruit peels of Citrus reticulata Blanco for use in all animal species ( FEFANA asbl. And the article contained the following:

Following a request from the European Commission, the EFSA Panel on Additives and Products or Substances used in Animal Feed ( FEEDAP ) was asked to deliver a scientific opinion on the safety and efficacy of expressed mandarin oil from the fruit peels of Citrus reticulata Blanco, when used as a sensory additive (flavouring) in feed and water for drinking for all animal species. The FEEDAP Panel concluded that the essential oil under assessment is safe up to the maximum proposed use levels in complete feed of 15 mg/kg for poultry, 33 mg/kg for pigs, 30 mg/kg for ruminants, 40 mg/kg for horse, and 15 mg/kg for salmon and rabbit. The presence of perillaldehyde was identified as a source of potential concern. However, in target species fed citrus byproducts as part of daily feed the use of the expressed mandarin oil in feed was not expected to increase the exposure to perillaldehyde to a relevant extent (< 4%). For companion animals and ornamental fish not normally exposed to citrus byproducts, no conclusion can be drawn. The FEEDAP Panel considered that the use in water for drinking is safe provided that the total daily intake of the additive does not exceed the daily amount that is considered safe when consumed via feed. No concerns for consumer safety were identified following the use of the additive up to the maximum proposed use level in feed. The essential oil under assessment should be considered as irritant to skin, eyes and the respiratory tract, and as a skin sensitizer. The use of the additive in animal feed under the proposed conditions of use was not expected to pose a risk for the environment. Expressed mandarin oil was recognized to flavor food. Since its function in feed would be essentially the same as that in food, no further demonstration of efficacy was considered necessary. The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).Computed Properties of 85-91-6

The Article related to citrus fruit peel mandarin oil feed additive, citrus reticulata blanco, d‐limonene, expressed mandarin oil, flavouring compounds, perillaldehyde, polymethoxylated flavones, sensory additives and other aspects.Computed Properties of 85-91-6

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

On June 4, 1993, Wei, Yen; Bakthavatchalam, R.; Jin, Xian Ming; Murphy, Christopher K.; Davis, Franklin A. published an article.Synthetic Route of 121129-31-5 The title of the article was Effect of aggregation on stereochemistry and mechanism of asymmetric oxidation of the lithium enolate of methyl 3,3-dimethylbutanoate in the solid state and in solution. And the article contained the following:

Oxidation of the title enolate by enantiopure (camphorylsulfonyl)oxaziridines in THF afforded α-hydroxy ester with 53-73% ee, but the product from the solid state reactions was racemic. The results suggest that the enolate exists and reacts as an aggregate in the solid state reactions. The experimental process involved the reaction of Methyl 2-hydroxy-3,3-dimethylbutanoate(cas: 121129-31-5).Synthetic Route of 121129-31-5

The Article related to asym oxidation lithium enolate mechanism, enantiopure camphorylsulfonyloxaziridine oxidation lithium enolate, stereoselective oxidation lithium enolate, solid state oxidation lithium enolate and other aspects.Synthetic Route of 121129-31-5

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

On September 15, 2019, Li, Shang-Zhen; Guan, Xiang-Ming; Gao, Zhao; Lan, Hong-Ci; Yin, Qiang; Chu, Chu; Yang, De-Po; Liu, E-Hu; Zhou, Ping published an article.Quality Control of Methyl N-Methylanthranilate The title of the article was A simple method to discriminate Guangchenpi and Chenpi by high-performance thin-layer chromatography and high-performance liquid chromatography based on analysis of dimethyl anthranilate. And the article contained the following:

Citri Reticulatae Pericarpium (CRP), the dried pericarp of Citrus reticulata Blanco, can be divided into “Guangchenpi” (GCP, the dried pericarps derived from Citrus reticulata ‘Chachi’) and “Chenpi” (CP, the dried pericarps derived from other cultivars of Citrus reticulata Blanco). To discriminate between GCP and CP, a simple and reliable high-performance thin-layer chromatog. (HPTLC) method was firstly developed to analyze the volatile compound di-Me anthranilate, and a high-performance liquid chromatog. (HPLC) method was established to simultaneously quantify di-Me anthranilate and three predominant flavonoids (hesperidin, nobiletin and tangeretin) in CRP samples. Both the HPTLC anal. and HPLC-orthogonal partial least squares discrimination anal. (OPLS-DA) indicated that GCP can be effectively distinguished from CP based on anal. of di-Me anthranilate. Our results indicated that di-Me anthranilate can be used as a marker compound for discrimination of GCP and CP. This work provided a convenient approach which might be applied for quality evaluation of CRP. The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).Quality Control of Methyl N-Methylanthranilate

The Article related to guangchenpi chenpi hplc hptlc dimethyl anthranilate, citri reticulatae pericarpium, dimethyl anthranilate, high-performance liquid chromatography, high-performance thin-layer chromatography and other aspects.Quality Control of Methyl N-Methylanthranilate

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

Ross, Tina Morgan; Liu, Jin-Jun published an article in 2010, the title of the article was 2-Chloro-4,6-dimethoxypyrimidine.Related Products of 121129-31-5 And the article contains the following content:

Preparation, properties, handling and applications of 2-chloro-4,6-dimethoxypyrimidine as reagent in nucleophilic substitution, carbonylation, nitration, Pechmann condensation reaction, Tisler triazolopyrimidine cyclization, cross-coupling reactions have been reviewed. The experimental process involved the reaction of Methyl 2-hydroxy-3,3-dimethylbutanoate(cas: 121129-31-5).Related Products of 121129-31-5

The Article related to review chloro dimethoxypyrimidine nucleophilic substitution alkoxycarbonylation nitration suzuki miyaura, triazolopyrimidine ferrocene chiral phosphine triazine coumarin preparation review and other aspects.Related Products of 121129-31-5

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

On June 13, 2022, Soete, Matthieu; Du Prez, Filip E. published an article.Related Products of 6038-19-3 The title of the article was Sequencing of Uniform Multifunctional Oligoesters via Random Chain Cleavages. And the article contained the following:

Sequence-defined polymers have been the object of many fascinating studies that focus on their implementation in both material and life science applications. In parallel, iterative synthetic methodologies have become more efficient, whereas the structure elucidation of these mols. is generally dependent on MS/MS anal. Here, we report an alternative, simple strategy for the determination of the monomer order of uniform oligo(thioether ester)s. This approach, which relies on random cleavages of ester units within the macromol. backbone via a basic treatment, enables the swift characterization of these macromols. without the need for MS/MS. Consequently, this method can be used for decoding any information stored within the primary structure of oligoesters by means of ESI- or LC-MS. Finally, we speculate that a range of structurally diverse backbones could be susceptible towards this approach, which could promptly expand the library of chem. sequenceable macromols. The experimental process involved the reaction of 3-Aminodihydrothiophen-2(3H)-one hydrochloride(cas: 6038-19-3).Related Products of 6038-19-3

The Article related to sequencing uniform multifunctional oligoester random chain cleavage, polymer degradation, random chain cleavages, sequence-controlled polymers, sequence-defined macromolecules, sequencing and other aspects.Related Products of 6038-19-3

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

Yang, Dan; Wang, Ping; Wu, Hanfu; Li, Jilan published an article in 2017, the title of the article was Synthesis and antimicrobial activities of novel quinazoline-2,4-dione acetyl hydrazones.Recommanded Product: Methyl N-Methylanthranilate And the article contains the following content:

Me 2-aminobenzoate was reacted with iodomethane to get Me N-methylanthranilate. The key intermediate 2-(6-chloro-1-methyl-2,4-dioxo-1,2-dihydroquinazolin-3(4H)-yl) acetohydrazide (I) was synthesized from Me N-methylanthranilate via substitution, hydrolysis, cyclization and hydrazinolysis reactions. Then the key intermediate I was reacted with various substituted aromatic aldehydes or ketones to afford a series of quinazolin-2,4-dione acetyl hydrazone compounds II [R1 = H, R2 = OMe-2, Cl-2, Br-2, OH-2, F-2, NO2-2, F-4, Cl-4, Br-4, OH-4, NO2-4, SMe-4, OMe-3-OH-4, NO2-3, OH-2-Cl-5 OMe-4; R1 = Me, R2 = Me-4, H, OMe-4; R1 = Et, R2 = H;]. The structures of all target compounds were characterized by means of 1H NMR, 13C NMR and MS. The preliminary bioassay indicated that the as-synthesized compounds had certain antibacterial activities against the tested strains. At the same time, some of them showed better antibacterial activities than the com. drugs such as streptomycin sulfate and polyoxin B. The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).Recommanded Product: Methyl N-Methylanthranilate

The Article related to quinazolinedione acetyl hydrazones preparation antimicrobial antibacterial antifungal activity, dioxodihydroquinazolinyl acetohydrazide preparation condensation aromatic aldehydes ketones and other aspects.Recommanded Product: Methyl N-Methylanthranilate

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

On November 16, 2021, Ma, Yongkai; Shi, Qingshan; He, Qianxian; Chen, Gu published an article.Recommanded Product: 85-91-6 The title of the article was Metabolomic insights into the inhibition mechanism of methyl N-methylanthranilate: A novel quorum sensing inhibitor and antibiofilm agent against Pseudomonas aeruginosa. And the article contained the following:

The quorum sensing (QS) inhibition effect of Me N-methylanthranilate (MMA) from Pericarpium Citri Reticulatae Chachiensis against foodborne pathogen Pseudomonas aeruginosa was reported for the first time. MMA effectively attenuated QS related virulence factors production and biofilm formation, while suppressed expression of a dozen of QS related genes. Untargeted LC-MS metabolomics revealed 108 significantly altered metabolites after MMA treatment. They indicated that MMA addition reduced the efficiency of TCA cycle and antioxidant systems, disturbed amino acid and nucleotide metabolism, increased unsaturated fatty acid and decreased peptidoglycan components, which might ultimately attenuate P. aeruginosa pathogenicity and restrain biofilm formation. Physiol. characterization confirmed the compromised membrane integrity and increased intracellular oxidative stress after MMA treatment. Furthermore, metabolomics data implied that MMA inhibition on QS might exert through disrupting QS autoinducer PQS biosynthesis, which was supported by mol. docking. Our data indicated that MMA could be used as a novel QS inhibitor and anti-biofilm agent to improve food safety. It also provided new insight in the possible underlying inhibition mechanism of MMA and the response of P. aeruginosa to MMA. The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).Recommanded Product: 85-91-6

The Article related to pseudomonas methyl n methylanthranilate quorum sensing biofilm food safety, antibiofilm, metabolomics, methyl n-methylanthranilate, pqsa, pseudomonas aeruginosa, quorum sensing inhibitor and other aspects.Recommanded Product: 85-91-6

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

On June 20, 2013, Heckel, Armin; Blum, Andreas; Hamprecht, Dieter; Kley, Joerg published a patent.Recommanded Product: Methyl 2-(3-formylphenyl)acetate The title of the patent was Preparation of heterocyclic compounds for treating lung and airways diseases. And the patent contained the following:

The present invention relates to compounds I [R1, R2 = H or alkyl; R3, R4 = H or Me; or R3 and R4 together form ethylene bridge; R5 = H, alkyl, alkylOC(O), etc.; R6 = H, halo, CN, etc.; R7 = H, halo, CN, etc.; R8 = H, halo, CN, etc.; R9 = H or Me; m, n = 0-2 (with the proviso that m+n<4); X = halo; L1 = a bond, CH2, CH2CH2, CH2O, etc.] and the tautomers and the salts thereof, particularly the pharmaceutically acceptable salts thereof with inorganic or organic acids and bases, which have valuable pharmacol. properties, particularly an inhibitory effect on epithelial sodium channels, the use thereof for the treatment of diseases, particularly diseases of the lungs and airways. Over 100 compounds I were prepared For example, reacting 3,5-diamino-6-chloro-N-[(methylsulfanyl)methanimidoyl]pyrazine-2-carboxamide with Me (4-aminopiperidin-1-yl)methyl-3-methoxybenzoate afforded 44% II. Exemplified compounds I were tested for their epithelial sodium channel inhibitory activity (data given). Pharmaceutical compositions comprising compound I, alone or in combination with other therapeutic agents, were disclosed. The experimental process involved the reaction of Methyl 2-(3-formylphenyl)acetate(cas: 142327-44-4).Recommanded Product: Methyl 2-(3-formylphenyl)acetate

The Article related to heterocyclic pyrazinecarboxamide preparation epithelial sodium channel enac inhibitor allergy, lung airway respiratory disease treatment antiasthmatic heterocyclic pyrazinecarboxamide preparation and other aspects.Recommanded Product: Methyl 2-(3-formylphenyl)acetate

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

On March 31, 2019, Chen, Kai; Huang, Xiongyi; Zhang, Shuo-Qing; Zhou, Andrew Z.; Kan, S. B. Jennifer; Hong, Xin; Arnold, Frances H. published an article.SDS of cas: 517-23-7 The title of the article was Engineered Cytochrome c-Catalyzed Lactone-Carbene B-H Insertion. And the article contained the following:

Previous work has demonstrated that variants of a heme protein, Rhodothermus marinus cytochrome c(Rma cyt c), catalyze abiol. carbene boron-hydrogen (B-H) bond insertion with high efficiency and selectivity. Here authors investigated this carbon-boron bond-forming chem. with cyclic, lactone-based carbenes. Using directed evolution, they obtained a Rma cyt c variant BORLAC that shows high selectivity and efficiency for B-H insertion of 5- and 6-membered lactone carbenes (up to 24,500 total turnovers and 97.1:2.9 enantiomeric ratio). The enzyme shows low activity with a 7-membered lactone carbene. Computational studies revealed a highly twisted geometry of the 7-membered lactone carbene intermediate relative to 5- and 6-membered ones. Directed evolution of cytochrome c together with computational characterization of key iron-carbene intermediates has allowed us to expand the scope of enzymic carbene B-H insertion to produce new lactone-based organoborons. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).SDS of cas: 517-23-7

The Article related to cytochrome c catalyzed lactone carbene boron hydrogen insertion, mol structure calculation hemeprotein biocatalyst, biocatalyst, carbene, cytochrome c, directed evolution, lactones, organoboron and other aspects.SDS of cas: 517-23-7

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

On July 1, 2022, Wang, Juan; Zhang, Bing; Wu, Qiang; Jiang, Xinye; Liu, Huijie; Wang, Chaozhong; Huang, Mingquan; Wu, Jihong; Zhang, Jinglin; Yu, Yougui published an article.Reference of Diethyl succinate The title of the article was Sensomics-assisted flavor decoding of coarse cereal Huangjiu. And the article contained the following:

Huangjiu is one of China national alc. beverages. The key odorants in four coarse cereal Huangjius (CCH) were identified by sensomics approach. Eighty-eight odorants were identified using solvent-assisted flavor evaporation combined with gas chromatog.-olfactometry/spectrometry and aroma extract dilution anal. Four aroma recombinates showed good similarities to the corresponding original aroma profiles (93.27-96.97%). Partial least squares regression anal. predicted vanillin and β-damascenone were the main causes of the aroma differences in the four CCHs. For the first time, omission and addition tests showed that β-damascenone caused the sweet and tea leaf aromas, whereas hexanal, nonanal, and 2-methyl-3-(methyldisulfanyl)furan contributed to the cooked grain aroma. Finally, 2-phenylethanol, Et (E)-3-phenyl-2-propenoate, Et 3-phenylpropanoate, vanillin, 3-(methylsulfanyl)propanal, γ-nonalactone, sotolon, β-damascenone, hexanal, nonanal, and 2-methyl-3-(methyldisulfanyl)furan were confirmed as the key odorants in the CCHs. 2-Methyl-3-(methyldisulfanyl)furan was a newly identified key odorant in Huangjiu. The experimental process involved the reaction of Diethyl succinate(cas: 123-25-1).Reference of Diethyl succinate

The Article related to sensomics vanillin hexanal coarse cereal huangjiu odorant flavor china, 2-methyl-3-(methyldisulfanyl)furan, coarse cereal huangjius, key odorants, sensomics, solvent-assisted flavor evaporation and other aspects.Reference of Diethyl succinate

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