Month: December 2022

Vasconcelos e Cruz, Joana published the artcileImproving Properties of an Experimental Universal Adhesive by Adding a Multifunctional Dendrimer (G-IEMA): Bond Strength and Nanoleakage Evaluation, Related Products of esters-buliding-blocks, the publication is Polymers (Basel, Switzerland) (2022), 14(7), 1462, database is CAplus and MEDLINE.

A vast number of adhesive formulations exist currently. However, available adhesives still have several drawbacks such as increased hydrophilicity, polymerization deficiency, potential cytotoxicity and limited monomer interdiffusion within dentin. To improve material properties, a Bisphenol A-free adhesive containing a novel dendrimer G(2)-isocyanatoethyl methacrylate (G-IEMA) in replacement of Bis-GMA was made and tested. Sound human molars were sectioned to expose mid-coronal dentin, which was bonded using four adhesives-Futurabond, Scotchbond Universal and experimentals EM1 and EM2. The exptl. adhesive EM2 contained G-IEMA, while EM1 had Bis-GMA. Groups were further allocated to two different adhesive strategies: etch-and-rinse (20 s etching) or self-etch. Immediate (24 h) microtensile bond strength to dentin (n = 5) was tested using a universal testing machine (1 mm/min, 5 kN; Shimadzu AGS-X Autograph, Tokyo, Japan), while the ultrastructure of the interface (n = 2) was assessed using SEM-energy dispersive spectroscopy (SEM-EDS). Nanoleakage expression was evaluated using silver nitrate penetration and posterior SEM-EDS anal. (n = 3). Linear mixed models/Generalized models were used for inferential statistics (5% significance level). Bond strength results did not depend on the adhesive choice, although differences were found between strategies (p < 0.001). Regarding nanoleakage, when applied in an etch-and-rinse mode, exptl. adhesives scored lower nanoleakage means than Futurabond and Scotchbond Universal. The novel adhesive shows interesting interfacial properties, with favorable nanoleakage results and a bond strength to dentin that matches current com. adhesives.

Polymers (Basel, Switzerland) published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C15H24S, Related Products of esters-buliding-blocks.

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

Sen, Supriyo published the artcileChemometric analysis reveals links in the formation of fragrant bio-molecules during agarwood (Aquilaria malaccensis) and fungal interactions, Application of Isobutyl palmitate, the publication is Scientific Reports (2017), 44406, database is CAplus and MEDLINE.

Fragrant agarwood, arguably the costliest wood in the world, is formed by plant-fungal interactions in Aquilaria spp. However, very little is known about this fragrant outcome of interaction. Therefore, mimicking the ancient traditions of agarwood production in Assam (Northeast India), a chemometric assessment of the agarwood-fungus interaction was made by chem. profiling (GC-MS) coupled with statistical anal. (principal component, correlation network anal.) across three platforms, viz. callus, juvenile plants and resinous wood-chips with an associated Fusarium. In the study of callus-fungus interaction, increased accumulation of key aroma compounds such as pentatriacontane {fold change (log2FC) = 3.47}, 17-pentatriacontene (log2FC = 2.95), tetradecane, 2-methyl- (log2FC = 1.10) over callus and activation of pathways related to defense and secondary metabolism indicated links to aroma production Study on fungal interactions in juvenile plants and resinous wood-chips indicated formation of terpenoid precursors (e.g. farnesol, geranylgeraniol acetate) and agarwood sesquiterpenes (e.g. agarospirol, γ-eudesmol). Correlation network anal. revealed the possible regulation of sesquiterpene biosynthesis involving squalene. Also a direct role of fungus in aroma (e.g. dodecane, 4-methyl-, tetracosane) was highlighted. Appearance of fragrant mols. unknown to agarwood during interaction featured as a new possibility for future research.

Scientific Reports published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C9H7NO3, Application of Isobutyl palmitate.

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

Renou, Michel published the artcileSex pheromones of zygaenid moths (Lepidoptera, Zygaenidae): electroantennographic data, Quality Control of 16974-11-1, the publication is Comptes Rendus des Seances de l’Academie des Sciences, Serie 3: Sciences de la Vie (1982), 295(10), 623-6, database is CAplus.

The electrophysiol. responses of the antennae of male Zygaena hippocrepidis and Z. filipendulae to 86 synthetic pheromonal compounds belonging to a series of C12, C14, or C16 monounsaturated acetates as well as the corresponding alcs. and aldehydes were recorded. (Z)-11-Tetradecenyl acetate (Z11 TDA) produced the highest responses of Z. hippocrepidis antennae. On the other hand, the antennae of male Z. filipendulae appeared to be more sensitive to (Z)-7-dodecenyl acetate. Moreover, Z11 TDA evokes sexual behavior in male Z. hippocrepidis and attracts males of this species in the field.

Comptes Rendus des Seances de l’Academie des Sciences, Serie 3: Sciences de la Vie 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, Quality Control of 16974-11-1.

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

Bosco-Levy, Pauline published the artcileComparative effectiveness of dimethyl fumarate in multiple sclerosis, SDS of cas: 624-49-7, the publication is British Journal of Clinical Pharmacology (2022), 88(3), 1268-1278, database is CAplus and MEDLINE.

To assess the effectiveness of di-Me fumarate (DMF) on annual rate of relapse subject to treatment (ARRt) and disability progression in multiple sclerosis (MS) compared to injectable immunomodulators (IMM), teriflunomide (TERI) and fingolimob (FTY), in real-life setting. A population-based cohort study was conducted using data of the French nationwide claims database, SNDS. All patients initiating IMM, TERI, FTY or DMF between 1 July 2015 and 12 Dec. 2017, with 4.5 years of database history and 1-3.5 years of follow-up were included in this study. DMF patients were 1:1 matched to IMM, TERI or FTY using a high dimensional propensity score. Neg. binomial regression and a logistic regression model were used to estimate the relative risk (RR ± [95% CI]) of ARRt and the odds ratio (OR ± [95% CI]) of disability progression, resp. Overall, 9304 subjects were identified: 29.0% initiated DMF, 33.2% TERI, 5.6% FTY and 32.2% an IMM. The matched cohorts consisted of 1779 DMF-IMM patients, 1679 DMF-TERI patients, and 376 DMF-FTY patients. DMF significantly reduced ARRt compared to IMM (RR 0.72 [0.61-0.86]) and TERI (0.81 [0.68-0.96]) and did not show any significant difference when compared with FTY. The risk of the progression of MS-specific disability was not significantly different for any matched cohorts. DMF is associated with lower risk of treated relapse for patients with RRMS than other first-line RRMS agents (TERI and IIM).

British Journal of Clinical Pharmacology 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 C6H8O4, SDS of cas: 624-49-7.

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

Bera, Sourav Sekhar published the artcileCp*Co^III-Catalyzed syn-Selective C-H Hydroarylation of Alkynes Using Benzamides: An Approach Toward Highly Conjugated Organic Frameworks, Application of 3-(Methoxycarbonyl)benzoic acid, the publication is Journal of Organic Chemistry (2017), 82(1), 420-430, database is CAplus and MEDLINE.

Hydroarylation of internal alkynes by cost effective CoIII-catalysis, directed by N-tert-Bu amides, is achieved to avail mono- or di-hydroarylated amide products selectively in an atom and step economic way. Several important functional groups were tolerated the reaction conditions, and syn-hydroarylation products were exclusively isolated. Notably, a fourfold C-H hydroarylation provided a highly conjugated organic framework (I) in one step. Kinetic study with extensive deuterium labeling experiments were performed to support the proposed mechanism.

Journal of Organic Chemistry published new progress about 1877-71-0. 1877-71-0 belongs to esters-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Ester, name is 3-(Methoxycarbonyl)benzoic acid, and the molecular formula is C9H8O4, Application of 3-(Methoxycarbonyl)benzoic acid.

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

Rupp, Tristan published the artcileTherapeutic Potential of Fingolimod and Dimethyl Fumarate in Non-Small Cell Lung Cancer Preclinical Models., SDS of cas: 624-49-7, the publication is International journal of molecular sciences (2022), 23(15), database is MEDLINE.

New therapies are required for patients with non-small cell lung cancer (NSCLC) for which the current standards of care poorly affect the patient prognosis of this aggressive cancer subtype. In this preclinical study, we aim to investigate the efficacy of Fingolimod, a described inhibitor of sphingosine-1-phosphate (S1P)/S1P receptors axis, and Dimethyl Fumarate (DMF), a methyl ester of fumaric acid, both already approved as immunomodulators in auto-immune diseases with additional expected anti-cancer effects. The impact of both drugs was analyzed with in vitro cell survival analysis and in vivo graft models using mouse and human NSCLC cells implanted in immunocompetent or immunodeficient mice, respectively. We demonstrated that Fingolimod and DMF repressed tumor progression without apparent adverse effects in vivo in three preclinical mouse NSCLC models. In vitro, Fingolimod did not affect either the tumor proliferation or the cytotoxicity, although DMF reduced tumor cell proliferation. These results suggest that Fingolimod and DMF affected tumor progression through different cellular mechanisms within the tumor microenvironment. Fingolimod and DMF might uncover potential therapeutic opportunities in NSCLC.

International journal of molecular sciences 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 C6H8O4, SDS of cas: 624-49-7.

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

Lynch, Denis published the artcileExploring the Scope of Asymmetric Synthesis of β-Hydroxy-γ-lactams via Noyori-type Reductions, Category: esters-buliding-blocks, the publication is Organic Letters (2016), 18(19), 4978-4981, database is CAplus and MEDLINE.

Enantio- and diastereoselective hydrogenation of β-keto-γ-lactams with a ruthenium-BINAP catalyst, involving dynamic kinetic resolution, has been employed to provide a general, asym. approach to β-hydroxy-γ-lactams, a structural motif common to several bioactive compounds Full conversion to the desired β-hydroxy-γ-lactams was achieved with high diastereoselectivity (up to >98% de) by addition of catalytic HCl and LiCl, while β-branching of the ketone substituent demonstrated a pronounced effect on the modest to excellent enantioselectivity (up to 97% ee) obtained.

Organic Letters published new progress about 5340-78-3. 5340-78-3 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is Ethyltert-butylacetate, and the molecular formula is C8H16O2, Category: esters-buliding-blocks.

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

Pasquini, Serena published the artcileInvestigations on the 4-Quinolone-3-carboxylic Acid Motif. 4. Identification of New Potent and Selective Ligands for the Cannabinoid Type 2 Receptor with Diverse Substitution Patterns and Antihyperalgesic Effects in Mice, Related Products of esters-buliding-blocks, the publication is Journal of Medicinal Chemistry (2011), 54(15), 5444-5453, database is CAplus and MEDLINE.

Exptl. evidence suggests that selective CB2 receptor modulators may provide access to antihyperalgesic agents devoid of psychotropic effects. Taking advantage of previous findings on structure-activity/selectivity relationships for a class of 4-quinolone-3-carboxamides, further structural modifications of the heterocyclic scaffold were explored, leading to the discovery of the 8-methoxy derivative 4a endowed with the highest affinity and selectivity ever reported for a CB2 ligand. The compound, evaluated in vivo in the formalin test, behaved as an inverse agonist by reducing at a dose of 6 mg/kg the second phase of the formalin-induced nocifensive response in mice.

Journal of Medicinal Chemistry published new progress about 924-99-2. 924-99-2 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Amine,Aliphatic hydrocarbon chain,Ester, name is Ethyl 3-(dimethylamino)acrylate, and the molecular formula is C7H13NO2, Related Products of esters-buliding-blocks.

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

Vervliet, Philippe published the artcileIdentification of chemicals leaching from dental resin-based materials after in vitro chemical and salivary degradation, Synthetic Route of 10287-53-3, the publication is Dental Materials (2022), 38(1), 19-32, database is CAplus and MEDLINE.

Only little is known about degradation of methacrylate monomers. Therefore, using in vitro chem. and saliva degradation this study aimed to identify the degradation products of organic compounds present in resin-based dental materials. Ten dental monomers and nine polymerized dental resin-based materials were immersed for 24 h in chem. media (0.1 M HCl, 0.1 M NaOH) and human pooled saliva in order to identify leached monomers and degradation products from chem. and saliva degradation Samples were analyzed using liquid chromatog. coupled to high-resolution mass spectrometry to identify previously unknown degradation products. During in vitro chem. degradation, uncured monomers were rapidly hydrolyzed into mono- and demethacrylated degradation products. During chem. degradation in alk. conditions of polymerized materials, considered the worst-case scenario, only degradation products could be detected. In acidic conditions, monomers and their degradation products were detected. In addition, different additives such as EDMAB, DMPA and HMBP were present in acidic degradation samples. Degradation in human pooled saliva for 24 h to mimic the in vivo situation, resulted in the identification of both monomers and their degradation products. Using state-of-the-art high-resolution mass spectrometry previously unknown degradation products of commonly used monomers were identified for the first time. Patients may be exposed to monomers and their degradation products in the first 24 h after restorative procedures. The results provide a base for further research on the degradation of resin-based dental composites in order to assess their safety using elution and toxicity studies.

Dental Materials published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C3H6O2, Synthetic Route of 10287-53-3.

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

Fuller, Ioan D. published the artcileChemical diversity of kanuka: Inter- and intraspecific variation of foliage terpenes and flavanones of Kunzea (Myrtaceae) in Aotearoa/New Zealand, Synthetic Route of 103-26-4, the publication is Phytochemistry (Elsevier) (2022), 113098, database is CAplus and MEDLINE.

Kunzea (Myrtaceae) trees and shrubs, generally called kanuka, grow across most of Aotearoa/New Zealand (NZ). With the exception of K. sinclairii, an offshore island endemic, kanuka had been treated as an Australasian species K. ericoides. However, a 2014 taxonomic revision recognized ten species, all endemic to NZ. Kanuka chem. is less studied than that of its closest relative in NZ, manuka (Leptospermum scoparium), which shows very distinct regional foliage chemotypes. We have used a miniaturized method with GC and 1H NMR to analyze foliage chem. of voucher specimens from across the geog. ranges of the ten NZ Kunzea species. We found common mono- and sesquiterpenes, with α-pinene dominant in all samples, but only traces of antimicrobial triketones. Two unusual flavanones, with unsubstituted B-rings and known bioactivity against Phytophthora, did distinguish some of the samples. 5,7-Dihydroxy-6,8-dimethyl flavanone was only found at high concentrations in the three K. sinclairii samples in this study’s sample set, but this compound has sep. been reported in K. robusta samples from a nearby region. Therefore none of the NZ Kunzea species was distinguished by the chem. analyzed in this study, but there is a possibility of regional flavonoid chemotypes cutting across the species boundaries.

Phytochemistry (Elsevier) published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Synthetic Route of 103-26-4.

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