Tag: M.W=200-250

Priscillal, I. Jenisha Daisy published the artcileSynchronously activated strontium aluminate nanoflakes anchored functionalized carbon nanofiber nanocomposite for sensitive amperometric detection of food additive: Propyl gallate, Computed Properties of 121-79-9, the publication is Food Chemistry (2022), 133119, database is CAplus and MEDLINE.

The contemporary dietary pattern is ruined by taste enhancers, flavoring agents, and preservatives. Pr gallate (PG) is an imperative phenolic antioxidant cast-off to inhibit the oxidative mutilation in foodstuffs thereby preventing rancidity. Determination and annihilation of PG are extensively concerned because of its probable lethal effects on human well-being. Herein, we report an electrochem. sensor using SrAl2O4/f-CNF nanocomposite as an efficient electrode modifier with peculiar synergistic quantum confinement effects supporting the formation of heterojunction to facilitate electron transportation between its counterparts. The structural, morphol., and crystalline features of SrAl2O4/f-CNF nanocomposite was thoroughly examined The proposed sensor possesses a wide linear range (0.1-1104.75μM) with a remarkably low limit of detection (0.075μM) and sensitivity (1.142μA·μM^-1·cm^-2) measured at 0.2 V (vs. Ag/AgCl). The reliability of this sensor was evidenced through real-time monitoring of PG in edible oil which is beneficial for food quality monitoring and dropping the danger of abuse of PG in foods.

Food Chemistry 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, Computed Properties of 121-79-9.

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

Wang, Wanyi published the artcileOccurrence of synthetic phenolic antioxidants in foodstuffs from ten provinces in China and its implications for human dietary exposure, HPLC of Formula: 121-79-9, the publication is Food and Chemical Toxicology (2022), 113134, database is CAplus and MEDLINE.

Synthetic phenolic antioxidants (SPAs) are widely used as food additives to delay the oxidation rate of oils and oil products. The concentrations and compositions of SPAs in Chinese residents most popular daily foods and the resulting exposure risk of SPAs are not clear. Therefore, this study collected food samples in 13 food categories (n = 289) from 10 provinces in China. At least one of the SPAs was detected in approx. 99.7% of foodstuffs, and the concentration of ∑SPAs ranged from not detected to 7830 (geometric mean (GM): 296 ng/g wet weight). 2,6-2 tert Bu p-1,4-benzoquinone (BHT-Q) was the main transformation product, but SPAs in food tend to exist in the parent form. A significant difference between food categories was analyzed. The highest GM of ΣSPAs occurred in cereals and cereal products, which was approx. 8 times higher than that in beverages. The estimated daily intakes of ΣSPAs in Chinese preschoolers, school-age children, adults and elderly individuals were 22200, 9970, 7540 and 7700 ng/kg bw/day, resp. The exposure risks of SPAs decreased with age. This is the first simultaneous anal. of SPAs in multiple provinces and multiple categories of foodstuffs.

Food and Chemical Toxicology 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 C12H10FeO4, HPLC of Formula: 121-79-9.

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

Jing, Li-jing published the artcileMolecularly imprinted film grafted from surface plasmon resonance sensor chip for determination of testosterone, Related Products of esters-buliding-blocks, the publication is Fenxi Huaxue (2016), 44(8), 1157-1164, database is CAplus.

A molecularly imprinted film (MIF) was prepared on the surface plasmon resonance (SPR) sensor chip for the detection of testosterone. The nanometer imprinted film was synthesized by surface grafting approach. First, the gold sensor chip was modified with an iniferter of benzyl diethyldithiocarbamate to create the “grafting from” polymeric surface. Grafting of the MIF onto the SPR chip was subsequently achieved through UV light-initiated copolymerization of methacrylic acid (functional monomer) and ethylene glycol dimethacrylate (crosslinker) in the presence of testosterone as a model template. The template mols. were then removed to form a MIF with specific recognition sites for testosterone. With this iniferter technique, self-aggregation in the reaction solution phase was avoided and grafting polymerization was confined to the exterior of the chip surface. The grafting process was implemented by in situ monitoring with SPR, which permitted the thickness of the film to be easily and strictly controlled. The chip surface modified with a testosterone-imprinted film was characterized by the methods of polarization modulation IR reflection absorption spectroscopy (PM-IRRAS) and at. force microscopy (AFM). According to the results, testosterone-imprinted film modification of the SPR chip was achieved by the distribution of numerous homogeneous, nanoscale holes on the surface. The testosterone-imprinted film was applied on a SPR sensor chip for the detection of testosterone in the range of 2.5 × 10^-16 to 2.5 × 10^-6 mol/L in acetonitrile with the lowest determining concentration of 2.5 × 10^-16 mol/L. Adsorption experiments showed that there were two kinds of binding sites in the MIF, and the linear correlations between the changes in reflectivity and the concentration of testosterone were y = 19.69 + 1.21x (R² = 0.9913) and y = 11.5 + 0.45x (R² = 0.9895), resp. Control experiments utilizing estradiol, estriol, and progesterone as analogs showed impressive selectivity and specificity for testosterone determination The testosterone-imprinted film reproducibility was evaluated with five cycles of rinsing-rebinding and the RSD was 16.8% and 11.2% for the SPR angle changes in rinsing and rebinding resp., demonstrating that the MIF-modified SPR sensor had good reproducibility and repeatability. Finally, the SPR sensor was successfully used to determine testosterone in artificial urine samples with recoveries from 85.2% to 92.8%.

Fenxi Huaxue published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, Related Products of esters-buliding-blocks.

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

Yang, Pan published the artcileExposure profiles and predictors of a cocktail of environmental chemicals in Chinese men of reproductive age, Product Details of C10H12O5, the publication is Chemosphere (2022), 134337, database is CAplus and MEDLINE.

Personal care products, such as additives, have raised widespread concerns about the potential threat to male reproductive health. The spermatogenesis in humans lasts for approx. 90 days, the average levels of these chems. remain unclear during spermatogenesis. In our study, we pooled urine samples from each man during the days of 1-15, 16-31, 32-63, and ≥64, and examined exposure to 48 typical additive chems. By principal component anal. (PCA), k-means clustering, and Spearman’s rank correlations, we then identified 6 PC scores and 4 clusters based on profiles of these chems. Some industrial, com. or structural similar chems. (e.g., phthalates) were significantly correlated compared to unrelated chems. (e.g., benzophenone). PCA scores were associated with individual lifestyles (e.g., household income, tea consumption, and drinking tap water). Distinct exposure components and exposure patterns of personal care products may help the reproductive health assessment of men. We suggested more concerns for widespread exposure to these chems. for men.

Chemosphere 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 C3H6F3N, Product Details of C10H12O5.

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

Anonymous published the artcileModified clerodanes from the essential oil of Dodonea viscosa leaves, Computed Properties of 6259-76-3, the main research area is Dodonea leaf essential oil clerodane computational model; Dodonea viscosa; bicyclo[5.4.0]undecane skeleton; density functional theory; electronic circular dichroism; essential oil; furanoid (nor)diterpenes.

Dodonea viscosa (L.) Jacq from Reunion Island (Indian Ocean) was investigated for its leaf essential oil composition The plant was extracted by hydrodistillation and its essential oil analyzed by gas chromatog. coupled to mass spectrometry. This study revealed that oxygenated norditerpenes and diterpenes were one of the major chem. classes (> 50%) mainly consisting of three modified cyclopropylclerodanes containing a bicyclo[5.4.0]undecane ring system: one new furanoid norditerpene, dodovisate C, and two furanoid diterpenes, the known Me dodovisate A and the new Me iso-dodovisate A. These three compounds were isolated by liquid chromatog. and their structures established on the basis of spectroscopic studies. The absolute configuration of dodovisate C was elucidated through a joint exptl. and theor. (B3LYP/6-311+G(d,p)) electronic CD study. The relative configurations of Me dodovisate A and Me iso-dodovisate A were determined using linear regressions of theor. chem. shifts vs. exptl. values with the (B3LYP/6-311+G(d,p)) method.

Molecules published new progress about Bond angle, dihedral. 6259-76-3 belongs to class esters-buliding-blocks, name is Hexyl 2-hydroxybenzoate, and the molecular formula is C13H18O3, Computed Properties of 6259-76-3.

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

Radulovic, Niko S. published the artcileImmunomodulatory Constituents of Conocephalum conicum (Snake Liverwort) and the Relationship of Isolepidozenes to Germacranes and Humulanes, Name: Hexyl 2-hydroxybenzoate, the main research area is immunomodulatory Conocephalum isolepidozene germacrane humulane.

Structural elucidation of three new sesquiterpenoids, namely, (1Z,4E)-lepidoza-1(10),4-dien-14-ol (I), rel-(1(10)Z,4S,5E,7R)-germacra-1(10),6 diene-11,14-diol (2), and rel-(1(10)Z,4S,5E,7R)-humula-1(10),5-diene-7,14-diol (3), isolated from the liverwort Conocephalum conicum, was accomplished by a combination of extensive NMR experiments, 1H NMR simulation, and other means. Addnl., the change of the identity of bicyclogermacren-14-al, previously reported as a C. conicum constituent, to isolepidozen-14-al is proposed. Compounds 2 and 3 appear to be related to I via hydration involving a shared intermediate, a substituted cyclopropylmethyl cation, formed by a highly regio- and stereoselective protonation of I, followed by a stereospecific fission of the three-membered ring. In other words, an isolepidozene derivative might be a branchpoint to humulanes and germacranes; this transformation could be of, up to now, unknown, biosynthetic and/or synthetic relevance. Multivariate statistical anal. of the compositional data of C. conicum extract constituents was used to probe the hypothesized biochem. relations. The immunomodulatory effect of I-3 and conocephalenol (4) was evaluated in an in vitro model on both nonstimulated and mitogen-stimulated rat splenocytes. The compounds displayed varying degrees of cytotoxicity to nonstimulated splenocytes, whereas 2 and 3 were found to exert immunosuppressive effects on Con A-stimulated splenocytes while not being cytotoxic at the same concentrations

Journal of Natural Products published new progress about Conocephalum conicum. 6259-76-3 belongs to class esters-buliding-blocks, name is Hexyl 2-hydroxybenzoate, and the molecular formula is C13H18O3, Name: Hexyl 2-hydroxybenzoate.

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

Li, Yiming published the artcileVisible-light-promoted oxidative halogenation of alkynes, Synthetic Route of 914943-91-2, the main research area is alkyne oxidative halogenation visible light.

In nature, halogenation promotes the biol. activity of secondary metabolites, especially geminal dihalogenation. Related natural mols. were studied for decades. In recent years, their diversified vital activities were explored for treating various diseases, which call for efficient and divergent synthetic strategies to facilitate drug discovery. Here the authors report a catalyst-free oxidative halogenation achieved under ambient conditions (halide ion, air, water, visible light, room temperature, and normal pressure). Constitutionally, electron transfer between the oxygen and halide ion is shuttled via simple conjugated mols., in which phenylacetylene works as both reactant and catalyst. Synthetically, it provides a highly compatible late-stage transformation strategy to build up dihaloacetophenones (DHAPs).

Chemical Communications (Cambridge, United Kingdom) published new progress about Alkynes, aryl Role: RCT (Reactant), RACT (Reactant or Reagent). 914943-91-2 belongs to class esters-buliding-blocks, name is tert-Butyl 3-ethynylbenzoate, and the molecular formula is C13H14O2, Synthetic Route of 914943-91-2.

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

Rammurthy, Banothu published the artcileMetal-free Catalytic Esterification of Aryl Alkyl Ketones with Alcohols via Free-radical Mediated C(sp3)-H Bond Oxygenation, SDS of cas: 20921-17-9, the main research area is alkyl benzoate preparation; aryl alkyl ketone aliphatic alc tandem esterification oxygenation.

A novel metal-free catalytic one-pot approach has been developed for the esterification of aralkyl ketones RC(O)R1 (R = Ph, naphth-2-yl, 2-bromophenyl, etc.; R1 = Me, Et, benzyl) with alcs. R2OH (R2 = Me, Et, i-Pr, n-Bu) under open-air atm. conditions. The inexpensive iodide/oxone reagent system allowed the cascade C(sp3)-H bond oxygenation, selective C-C bond cleavage and esterification through the both radical and ionic pathways in a stepwise manner in one-pot. This mild, convenient and economically viable catalytic method tolerates the various functional groups to provide the corresponding alkyl benzoates RC(O)OR2 in up to 98% yields with up to 99% selectivity. The efficiency and feasibility of scale-up of the present catalytic system were demonstrated with gram scale experiments (up to 10 g scale).

Asian Journal of Organic Chemistry published new progress about Aliphatic alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 20921-17-9 belongs to class esters-buliding-blocks, name is Ethyl 4-(2-hydroxyphenyl)butanoate, and the molecular formula is C12H16O3, SDS of cas: 20921-17-9.

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

Sousa, Antonio published the artcileGeographical differentiation of apple ciders based on volatile fingerprint, Application In Synthesis of 6259-76-3, the main research area is apple cider volatile fingerprint geog differentiation; Apple varieties (Malus domestica); Geographical regions; Markers; Volatile organic compounds.

With the globalization of food trade, its traceability and genuineness becomes increasingly more difficult. Therefore, it is necessary to develop anal. tools to define the authenticity and genuineness of food-derived products. In the current work, headspace solid-phase microextraction followed by gas chromatog.-mass spectrometry (HS-SPME/GC-MS) combined with chemometric tools was used to establish the volatile fingerprint of apple ciders produced in different geog. regions of Madeira Island, in order to define their typicity and to identify putative geog. markers. A total of 143 volatile organic compounds (VOCs) belonging to different chem. families have been identified, of which 28 were found in all apple ciders independently of geog. region. Esters, terpenic and furanic compounds presented on average a higher contribution for the total volatile fingerprint in cider produced in northern region of the Island, whereas alcs., acids, volatile phenols, carbonyl compounds and lactones in cider from southern region. Considering the relative areas of the VOCs, 43 revealed statistically significant differences (p < 0.001) between geog. regions, and 11 between northern and southern regions. A clear differentiation among cider-producing regions was observed on the developed partial least squares-discriminant anal. (PLS-DA) model. Two alcs. (1-hexanol, 1-octanol), 6 esters (Me acetate, (Z)-3-hexen-1-ol acetate, Et hexanoate, Et nonanote, Et octanoate, isoamyl octanoate) and 1 terpenic compound (limonene), can be considered putative geog. markers due to their discriminatory ability. The results obtained recognize the specific and typical geog. characteristics of the cider, which will allow the forthcoming guarantee for the construction of a sustainable platform for the establishment of the authenticity and typicality of the regional cider. Food Research International published new progress about Acids Role: FFD (Food or Feed Use), BIOL (Biological Study), USES (Uses). 6259-76-3 belongs to class esters-buliding-blocks, name is Hexyl 2-hydroxybenzoate, and the molecular formula is C13H18O3, Application In Synthesis of 6259-76-3.

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

Booij, C. J. H. published the artcileNew sex attractants for 35 tortricid and 4 other lepidopterous species, found by systematic field screening in The Netherlands, SDS of cas: 16974-11-1, the publication is Journal of Chemical Ecology (1984), 10(1), 135-44, database is CAplus and MEDLINE.

Dodecen-1-ols and their acetates that are unsaturated at positions 8 or 9 (Z8-12:Ac, E8-12:Ac, E8-12:OH, E8-12:OH, Z9-12:Ac, E9-12:Ac, Z9-12:OH, E9-12:OH; the number following E or Z is the position of the double bond; the next number is the chain length; OH = alc.; Ac = acetate) are sex attractants for tortricid species of the subfamily Olethreutinae. Blends of these dodecenols were tested for their efficacy and were found species dependent.

Journal of Chemical Ecology 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, SDS of cas: 16974-11-1.

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