Category: esters-buliding-blocks

Han, Guibiao published the artcileThe sex pheromone communication system of adult jujube leafroller Ancylis sativa Liu, Product Details of C14H26O2, the publication is Kunchong Xuebao (1999), 42(1), 5-30, database is CAplus.

The titer and precise ratio of multi-components of A. sativa sex pheromone were determined by using anal. technique of single sex pheromone gland. The results showed that: (1) the female sex pheromone contained 2 isomers, i. e. E9-12:Ac and Z9-12:Ac; and (2) the sex pheromone production of females had a diel periodicity. The female moths began to produce sex pheromone at the onset of the scotophase and the quantity increased gradually. Pheromone production peak occurred at the 6.5 h of the 2nd scotophase, and the pheromone titers released by females of various generations are different. The pheromone titer released by females of the overwintering generation or the 2nd generation was much higher than that of the 1st generation, but the ratios of the 2-isomeric components in different generations were the same.

Kunchong Xuebao published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Product Details of C14H26O2.

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

Du, Xuyang published the artcileMolecular design directs self-assembly of DPP polycatenars into 2D and 3D complex nanostructures, Application of Propyl 3,4,5-trihydroxybenzoate, the publication is Journal of Molecular Liquids (2022), 118605, database is CAplus.

Novel diketopyrrolopyrrole (DPP) based polycatenars characterized with a long π-conjugated rigid calamitic core, different side groups (t-Boc, H or PEO) at the lactam N atoms of the central DPP core and terminal hydrophobic paraffinic chains were prepared via Sonogashira coupling reaction as key steps. The influence of different side groups, different links and the length of terminal alkyl chains on the properties of these DPP derivatives was discussed. Such DPP polycaternars can self-assemble into bicontinuous cubic phase (Cub_v/Ia3d) and hexagonal columnar phase (Col_hex) in their pure states, as well as organogels in solution UV and PL spectra investigation reveals that these compounds can display broad and strong absorption in the region of 275-650 nm and can emit in the NIR region (650-850 nm) with low energy gap (1.94 ev), meanwhile ICT effects have been detected between such DPP polycaternars and C70, indicating the potential application of these compounds in solar cell.

Journal of Molecular Liquids published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Application of Propyl 3,4,5-trihydroxybenzoate.

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

Liu, Runzeng published the artcileSingle-Use Face Masks as a Potential Source of Synthetic Antioxidants to the Environment, Formula: C42H63O3P, the publication is Environmental Science & Technology Letters (2021), 8(8), 651-655, database is CAplus.

Single-use face masks are a powerful tool for reducing the spread of COVID-19. The usage of single-use face masks has increased enormously since the start of the COVID-19 pandemic, and pollution from the huge volume of discarded single-use face masks may become an environmental issue. This study focuses on synthetic antioxidants (AOs), including synthetic phenolic antioxidants (SPAs) and organophosphite antioxidants (OPAs), used in single-use 3-layer face masks. Both SPAs and OPAs were detected in single-use face masks, with total concentrations ranging 20.0-575μg/g (median of 175μg/g). The dominant congeners detected in the face masks were tris(2,4-di-tert-butylphenyl) phosphite (AO168, median of 83.2μg/g), tris(2,4-di-tert-butylphenyl) phosphate (AO168O, median of 72.9μg/g), and pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] (AO1010, median of 13.7μg/g). No significant concentration difference was observed between medical and nonmedical face masks. Among the 3 different layers of the face masks, the middle layers showed the highest AO concentrations On the basis of the median concentrations detected, we estimate that 1084 tons of AOs is used in face masks annually, suggesting that discarded face masks may be a source of AOs to the environment. This is the 1st study to report the occurrence of a wide range of AOs in face masks.

Environmental Science & Technology Letters published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, Formula: C42H63O3P.

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

Grant, G. G. published the artcileSex attractants for some eastern species of Rhyacionia, including a new species, and Eucosma gloriola (Lepidoptera: Tortricidae), Computed Properties of 16974-11-1, the publication is Canadian Entomologist (1985), 117(12), 1489-96, database is CAplus.

Field-screening tests using dodecenyl and dodecadienyl acetates and alcs. were conducted in pine plantations in northern Ontario to find attractants for Rhyacionia and Eucosma moths. R. adana Was attracted by various ratios of (E)-9-dodecenyl acetate  [35148-19-7] and (E)-9-dodecen-1-ol  [35237-62-8] (99:1 to 70:30) but no clear preference was observed R. busckana Was attracted to the same ratios of these compounds R. granti Was attracted to (E,E)-8,10-dodecadienyl acetate  [53880-51-6]. R. granti And R. busckana are newly recognized sibling species distinguished in this study by differences in their resp. attractants, electroantennogram responses, and phenologies. E. gloriola, Was optimally attracted by 9:1 and 8:2 ratios of (Z)-9-dodecenyl acetate  [16974-11-1] and (E)-9-dodecenyl acetate. Flight data for the 4 species in the same plantation revealed overlapping flight periods. R. granti Was the earliest flier, followed closely by R. adana and R. busckana, and somewhat later by E. gloriola.

Canadian Entomologist published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Computed Properties of 16974-11-1.

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

Venthur, Herbert published the artcileStructural investigation of selective binding dynamics for the pheromone-binding protein 1 of the grapevine moth, Lobesia botrana, Computed Properties of 16974-11-1, the publication is Archives of Insect Biochemistry and Physiology (2019), 101(3), n/a, database is CAplus and MEDLINE.

The European grapevine moth, Lobesia botrana (Denis & Schiffermuller), is a serious pest in vineyards in North and South America. Mating disruption techniques have been used to control and monitor L. botrana on the basis of its sexual communication. This needs a well-tuned olfactory system, in which it is believed that pheromone-binding proteins (PBPs) are key players that transport pheromones in the antennae of moths. In this study, the selectivity of a PBP, named as LbotPBP1, was tested by fluorescence binding assays against 11 sex pheromone components and 6 host plant volatiles. In addition, its binding mechanism was predicted on the basis of structural analyses by mol. docking and complex and steered mol. dynamics (SMD). Our results indicate that LbotPBP1 binds selectively to sex pheromone components over certain host plant volatiles, according to both in vitro and in silico tests. Thus, chain length (14 carbon atoms) and functional groups (i.e., alc. and ester) appear to be key features for stable binding. Likewise, residues such as Phe12, Phe36, and Phe118 could participate in unspecific binding processes, while Ser9, Ser56, and Trp114 could participate in the specific recognition and stabilization of sex pheromones instead of host plant volatiles. Moreover, our SMD approach supported 11-dodecenyl acetate as the best ligand for LbotPBP1. Overall, the dynamics simulations, contact frequency anal. and SMD shed light on the binding mechanism of LbotPBP1 and could overcome the imprecision of mol. docking, supporting the in vitro binding assays. Finally, the role of LbotPBP1 in the chem. ecol. of L. botrana is discussed.

Archives of Insect Biochemistry and Physiology published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C15H21BO3, Computed Properties of 16974-11-1.

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

Smith, Jeffrey S. published the artcileA robust structure-activity relationship (SAR) model for esters that cause skin irritation in humans, Safety of 3-Methylbut-2-en-1-yl benzoate, the publication is Toxicological Sciences (2000), 55(1), 215-222, database is CAplus and MEDLINE.

A structure-activity relationship (SAR) model has been developed to discriminate skin irritant from nonirritant esters. The model is based on the physicochem. properties of 42 esters that were tested in humans for skin irritation. Nineteen physicochem. parameters that represent transport, electronic, and steric properties were calculated for each chem. Best subsets regression anal. indicated candidate models for further anal. Regression analyses identified significant models (p < 0.05) that had variables that were also significant (p < 0.05). These candidate models were evaluated using linear discriminant anal. to determine if the irritant esters could be discriminated from nonirritant esters. The stability of the model was evident from the consistency of parameters among ten submodels generated using multiple random sampling of the database. The sensitivity of the ten models, evaluated by “leave-one-out” cross-validation, ranged from 0.846 to 0.923, with a mean of 0.885±0.025 (95% CI). The specificity ranged from 0.615 to 0.923, with a mean of 0.738±0.06 (CI). Compared with nonirritant esters, irritant esters had lower d., lower water solubility, lower sum of partial pos. charges, higher Hansen hydrogen bonding parameter, and higher Hansen dispersion parameter. The results indicate that physicochem. features of esters contribute to their ability to cause skin irritation in humans, and that chem. partitioning into the epidermis and intermol. reactions are likely important components of the response. This model is applicable for prediction of human irritation of esters yet untested.

Toxicological Sciences published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C19H14O2, Safety of 3-Methylbut-2-en-1-yl benzoate.

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

Jin, Jian published the artcileAlcohols as alkylating agents in heteroarene C-H functionalization, COA of Formula: C5H10O2S, the publication is Nature (London, United Kingdom) (2015), 525(7567), 87-90, database is CAplus and MEDLINE.

Primary alcs., diols containing at least one primary alc. moiety, and tetrahydrofurans acted as alkylating agents for six-membered nitrogen heterocycles such as isoquinolines, quinolines, and pyridines in the presence of an iridium photocatalyst Ir(ppy)₂(dtbbp)PF₆ (ppy = 1,2′-phenylpyridinediyl; dtbpy = 4,4′-di-tert-butyl-2,2-bipyridine), a thiol such as α-mercaptopropanoic acid, and p-toluenesulfonic acid in DMSO under blue LED light to yield alkylated heterocycles such as 1-methylisoquinoline in 43-98% yields. The medicinal agents fasudil dihydrochloride and milrinone were methylated and 3-phenylpropylated, resp., using this method in 82% and 43% yields. The method avoids the use of thermal conditions or stoichiometric oxidants. The mechanism was studied using fluorescence quenching experiments; the key step in the process is proposed to be the spin-center shift of a hydroxyalkylheteroaryl radical to yield an alkylheteroaryl radical with loss of water, precedented in biol. and synthetic settings. In the absence of a thiol, the radical generated from 1-isoquinolinemethanol coupled with two alkenes and two 1-pyrrolecarboxylates to yield dihydrobenzoisoquinolines and pyrrolylmethylisoquinolines, resp., in 25-65% yields.

Nature (London, United Kingdom) published new progress about 19788-49-9. 19788-49-9 belongs to esters-buliding-blocks, auxiliary class Thiol,Aliphatic hydrocarbon chain,Ester, name is Ethyl 2-mercaptopropanoate, and the molecular formula is C5H10O2S, COA of Formula: C5H10O2S.

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

Smith, Tyler E. published the artcileRisk of COVID-19 infection and severe disease in MS patients on different disease-modifying therapies, Formula: C6H8O4, the publication is Multiple Sclerosis and Related Disorders (2022), 103735, database is CAplus and MEDLINE.

The risk of SARS-CoV-2 infection and severity with disease modifying therapies (DMTs) in multiple sclerosis (MS) remains unclear, with some studies demonstrating increased risks of infection with B-cell-depleting (anti-CD20) therapies and severity, while others fail to observe an association Most existing studies are limited by a reliance on ′numerator′ data (i.e., COVID-19 cases) only. To assess the risks of COVID-19 by DMT, this study aimed to assess both ′numerator′ (patients with SARS-CoV-2 infection) and ′denominator′ data (all patients treated with DMTs of interest) to determine if any DMTs impart an increased risk of SARS-CoV-2 infection or disease severity. We systematically reviewed charts and queried patients during clinic encounters in the NYU MS Comprehensive Care Center (MSCCC) for evidence of COVID-19 in all patients who were on the most commonly used DMTs in our clinic (sphingosine-1-phosphate receptor (S1P) modulators (fingolimod/siponimod), rituximab, ocrelizumab, fumarates (di-Me fumarate/diroximel fumarate), and natalizumab). COVID-19 status was determined by clin. symptoms (CDC case definition) and laboratory testing where available (SARS-CoV-2 PCR, SARS-CoV-2 IgG). Multivariable analyses were conducted to determine predictors of infection and severe disease (hospitalization or death) using SARS-CoV-2 infected individuals per DMT group and all individuals on a given DMT as denominator. We identified 1,439 MS patients on DMTs of interest, of which 230 had lab-confirmed (n = 173; 75.2%) or suspected (n = 57; 24.8%) COVID-19. Infection was most frequent in those on rituximab (35/138; 25.4%), followed by fumarates (39/217; 18.0%), S1P modulators (43/250; 17.2%), natalizumab (36/245; 14.7%), and ocrelizumab (77/589; 13.1%). There were 14 hospitalizations and 2 deaths. No DMT was found to be significantly associated with increased risk of SARS-CoV-2 infection. Rituximab was a predictor of severe SARS-CoV-2 infection among patients with SARS-CoV-2 infection (OR 6.7; 95% CI 1.1-41.7) but did not reach statistical significance when the entire patient population on DMT was used (OR 2.8; 95% CI 0.6-12.2). No other DMT was associated with an increased risk of severe COVID-19. Anal. of COVID-19 risk among all patients on the commonly used DMTs did not demonstrate increased risk of infection with any DMT. Rituximab was associated with increased risk for severe disease.

Multiple Sclerosis and Related Disorders published new progress about 624-49-7. 624-49-7 belongs to esters-buliding-blocks, auxiliary class Inhibitor,Natural product, name is Dimethyl fumarate, and the molecular formula is C11H22N2O4, Formula: C6H8O4.

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

Aparna Lakshmi, I. published the artcileHistone deacetylase inhibitors in cancer therapy: an update, Product Details of C10H18O4, the publication is International Journal of Pharmaceutical Sciences Review and Research (2011), 10(1), 38-44, database is CAplus.

A review. Histone deacetylase inhibitors (HDACi) are novel class of anti-neoplastic agents and they mostly act by enhancing acetylation of histones, and promotes uncoiling of chromatin and activation of a large number of genes implicated in the regulation of cell survival like proliferation, differentiation and apoptosis. Most of them are therapeutic targets for cancer, neurodegenerative diseases and a number of other disorders. The histone deacetylases (HDACs) can be divided into two families, which include a total of eleven enzymes. The Zn⁺² dependent HDAC family composed of class I (HDACs 1, 2, 3 and 8), class II a/b (HDACs 4, 5, 6, 7, 9 and 10), and class IV (HDAC 11) and (2) Zn⁺² independent NAD-dependent class III SIRT enzymes. Histone deacetylase inhibitors (HDACi) which are been investigated for their antitumor potency are of with different chem. structures i.e Short-chain fatty acids (e.g. sodium butyrare), phenylburyrare, valproic acid and (AN-9), Hydroxyaminic acids (SAHA, pyroxamide, TSA, oxamflarin and CHPAs), Synthetic benzamide derivatives (e.g., MS-275 and Cl-994), Cyclic tetrapeptides (such as depsipeptide, trapoxin and apicidin), Electrophilic ketones (trifluoromethylketone), and Miscellaneous (depudecin, SNDX-275 and isothiocyanates). HDACi can have multiple mechanisms of inducing transformed cell growth arrest and cell death. These HDAC substrates are directly or indirectly involved in numerous important cell pathways including control of gene expression, regulation of cell proliferation, differentiation, migration, and death. As a consequence, HDACi can have multiple mechanisms of inducing transformed cell growth arrest and cell death. HDACi can be used in combination with radiation therapy, antitubulin agents, topoisomerase I and II inhibitors etc.

International Journal of Pharmaceutical Sciences Review and Research published new progress about 122110-53-6. 122110-53-6 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester,Inhibitor, name is (Pivaloyloxy)methyl butyrate, and the molecular formula is C10H18O4, Product Details of C10H18O4.

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

Garcia, Caroline A. published the artcileEffects of crude protein and sodium intake on water turnover in cats fed extruded diets, SDS of cas: 121-79-9, the publication is Journal of Animal Physiology and Animal Nutrition (2021), 105(S2), 95-105, database is CAplus and MEDLINE.

The comprehension of strategies to increase urine production may be important, especially in kibble diets to prevent urolithiasis in cats. The effects of increasing amounts of crude protein (CP) and sodium on the water turnover of cats were evaluated using the water balance (WB) method and the deuterium dilution technique. The study followed a randomized block design, with three blocks of eight cats, two cats per food type in each block, and six cats per food. Four extruded diets with different amounts of CP and sodium were evaluated (on DM basis): 28% CP and 0.58% sodium; 39% CP and 0.64% sodium; 52% CP and 0.76% sodium; and 64% CP and 0.87% sodium. Cats were individually housed in cages for 8 days to measure WB, urea excretion, and faecal and urine characteristics. Deuterium oxide was used to evaluate water turnover, and during the period cats were housed in a collective cattery. The data were analyzed by an F test, and the means were compared by polynomial contrasts. The level of significance was set at 0.05. The methods were compared by Pearson correlation, and Bland and Altman anal. The increase in the CP content elevated linearly the renal excretion of urea (p < .001), and, together with the higher sodium intake, elevated the renal solute load, which resulted in a linear increase in urine production and water intake (p < .01). The urine d., metabolic water, and faecal and insensible water losses did not differ (p > .05). The water flux increased linearly when using the deuterium method (p < .001), but the obtained values were 20.85 ± 11.11 mL/cat/day higher than those verified using the WB method (p = .001). Higher CP and sodium amounts in dry diets increased the urine production and water consumption of cats, and this can be explored as a possible option to increase urination.

Journal of Animal Physiology and Animal Nutrition published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, SDS of cas: 121-79-9.

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