Tag: M.W=250-300

He, Xiang-Hong; Yang, Lei; Huang, Wei; Zhao, Qian; Pan, Xiao-Li; Jiang, Dao-Feng; Yang, Ming-Cheng; Peng, Cheng; Han, Bo published the artcile< Catalytic cross-benzoin/Michael/acetalization cascade for asymmetric synthesis of trifluoromethylated γ-butyrolactones>, Category: esters-buliding-blocks, the main research area is trifluoromethyl gamma butyrolactone preparation enantioselective diastereoselective chemoselective regioselective; aldehyde trifluoroacetaldehyde ethyl hemiacetal enal cascade benzoin Michael acetalization.

A sequential NHC-amine catalytic cascade reaction was developed to assemble aromatic aldehydes R1CHO [R1 = Ph, 3-ClC6H4, 4-ClC6H4, 3-BrC6H4, 4-BrC6H4, 2-FC6H4, 4-FC6H4, 4-i-PrC6H4, 2-furyl, 2-thienyl, (E)-PhCH:CH], trifluoroacetaldehyde Et hemiacetal, and enals (E)-R2CH:CHCHO (R2 = Ph, 2-ClC6H4, 4-ClC6H4, 4-BrC6H4, 2-FC6H4, 3-FC6H4, 4-FC6H4, 4-O2NC6H4, 4-MeC6H4, 2-MeOC6H4, 2-furyl, Me) asym. into CF3-substituted chiral γ-butyrolactones I [R1 = Ph, 3-ClC6H4, 4-ClC6H4, 3-BrC6H4, 4-BrC6H4, 2-FC6H4, 4-FC6H4, 4-i-PrC6H4, 2-furyl, 2-thienyl, (E)-PhCH:CH; R2 = Ph, 2-ClC6H4, 4-ClC6H4, 4-BrC6H4, 2-FC6H4, 3-FC6H4, 4-FC6H4, 4-O2NC6H4, 4-MeC6H4, 2-MeOC6H4, 2-furyl, Me] featuring vicinal quaternary and tertiary stereocenters in 48-78% yields, 62:38-89:11 dr, and in 60-94% ee. This approach incorporated a highly chemoselective intermol. cross-benzoin reaction and a highly regioselective Michael-acetalization cascade. Various multi-functionalized THF scaffolds were readily prepared from hemiacetal intermediates through convenient organic transformations.

RSC Advances published new progress about Aryl aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

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

Bonifacio, Maria Addolorata; Genchi, Chiara; Lagioia, Antonella; Talamo, Vincenza; Volpe, Anna; Mariggio, Maria Addolorata published the artcile< Analytical Assessment of the Vela Diagnostics NGS Assay for HIV Genotyping and Resistance Testing: The Apulian Experience>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is diagnosis next generation sequencing HIV genotyping resistance; Sanger sequencing (SS); Vela Diagnostics; genotyping; human immunodeficiency virus (HIV); integrase strand transfer inhibitors (INSTIs); next-generation sequencing (NGS); non-nucleoside reverse transcriptase inhibitors (NNRTIs); nucleoside reverse transcriptase inhibitors (NRTIs); protease inhibitors (PIs); resistance-associated mutations (RAM).

Drug-resistance monitoring is one of the hardest challenges in HIV management. Next-generation sequencing (NGS) technologies speed up the detection of drug resistance, allowing the adjustment of antiretroviral therapy and enhancing the quality of life of people living with HIV. Recently, the NGS Sentosa SQ HIV Genotyping Assay (Vela Diagnostics) received approval for in vitro diagnostics use. This work is the first Italian evaluation of the performance of the Vela Diagnostics NGS platform, assessed with 420 HIV-1 clin. samples. A comparison with Sanger sequencing performance is also reported, highlighting the advantages and disadvantages of the Sentosa NGS assay. The precision of the technol. was studied with reference specimens, while intra- and inter-assay reproducibility were evaluated for selected clin. samples. Vela Diagnostics’ NGS assay reached an 87% success rate through 30 runs of anal. in a real-world clin. context. The concordance with Sanger sequencing outcomes was equal to 97.2%. Several detected mismatches were due to NGS’s superior sensitivity to low-frequency variants. A high accuracy was observed in testing reference samples. Repeatability and reproducibility assays highlighted the good performance of the NGS platform. Beyond a few tech. issues that call for further optimization, the key improvement will be a better balance between costs and processing speed. Once these issues have been solved, the Sentosa SQ HIV Genotyping Assay will be the way forward for HIV resistance testing.

International Journal of Molecular Sciences published new progress about Antiviral agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Schoepf, Isabella C.; Thorball, Christian W.; Ledergerber, Bruno; Engel, Tanja; Raffenberg, Marieke; Kootstra, Neeltje A.; Reiss, Peter; Hasse, Barbara; Marzolini, Catia; Thurnheer, Christine; Seneghini, Marco; Bernasconi, Enos; Cavassini, Matthias; Buvelot, Helene; Kouyos, Roger; Gunthard, Huldrych F.; Fellay, Jacques; Tarr, Philip E.; The Swiss HIV Cohort Study published the artcile< Coronary artery disease-associated and longevity-associated polygenic risk scores for prediction of coronary artery disease events in persons living with human immunodeficiency virus: the Swiss HIV Cohort Study>, HPLC of Formula: 112-63-0, the main research area is human immunodeficiency virus coronary artery disease polygenic risk; Aging; HIV infection; coronary artery disease; multivariable analysis; polygenic risk score.

Coronary artery disease (CAD) is in part genetically determined Aging is accentuated in people with human immunodeficiency virus (HIV) (PLWH). It is unknown whether genetic CAD event prediction in PLWH is improved by applying individual polygenic risk scores (PRSs) and by considering genetic variants associated with successful aging and longevity. In the Swiss HIV Cohort Study participants of self-reported European descent, we determined univariable and multivariable odds ratios (ORs) for CAD events, based on traditional CAD risk factors, adverse antiretroviral exposures, and different validated genome-wide PRSs. PRSs were built from CAD-associated single-nucleotide polymorphisms (SNPs), longevity-associated SNPs, or both. We included 269 patients with CAD events between 2000 and 2017 (median age, 54 years; 87% male; 82% with suppressed HIV RNA) and 567 event-free controls. Clin. (ie, traditional and HIV-related) risk factors and PRSs, built from CAD-associated SNPs, longevity-associated SNPs, or both, each contributed independently to CAD events (P < .001). Participants with the most unfavorable clin. risk factor profile (top quintile) had an adjusted CAD-OR of 17.82 (95% confidence interval [CI], 8.19-38.76), compared with participants in the bottom quintile. Participants with the most unfavorable CAD-PRSs (top quintile) had an adjusted CAD-OR of 3.17 (95% CI, 1.74-5.79), compared with the bottom quintile. After adding longevity-associated SNPs to the CAD-PRS, participants with the most unfavorable genetic background (top quintile) had an adjusted CAD-OR of 3.67 (95% CI, 2.00-6.73), compared with the bottom quintile. In Swiss PLWH, CAD prediction based on traditional and HIV-related risk factors was superior to genetic CAD prediction based on longevity- and CAD-associated PRS. Combining traditional, HIV-related, and genetic risk factors provided the most powerful CAD prediction. Clinical Infectious Diseases published new progress about Aging, animal. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

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

Koerts, Janneke; Velraeds, Martine M. C.; Soffers, Ans E. M. F.; Vervoort, Jacques; Rietjens, Ivonne M. C. M. published the artcile< Influence of Substituents in Fluorobenzene Derivatives on the Cytochrome P450-Catalyzed Hydroxylation at the Adjacent Ortho Aromatic Carbon Center>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is fluorobenzene derivative cytochrome P 450 hydroxylation.

In a previous study, the in vivo cytochrome P 450-catalyzed regioselectivity of aromatic ring hydroxylation for a series of (poly)fluorobenzenes could be quant. predicted by the calculated frontier orbital d. distribution in the aromatic ring (1993). However, the relative small fluorine, its size almost comparable to a hydrogen, is not expected to influence the regioselectivity of aromatic hydroxylation due to steric hindrance. The aim of the present study was to investigate the influence of substituents larger than a hydrogen or fluorine on the possibilities for hydroxylation at the adjacent carbon center. First, the in vivo regioselectivity of aromatic ring hydroxylation of a series of C4-substituted fluorobenzenes was investigated. The results obtained demonstrate that a chlorine and cyano C4 substituent do not hamper hydroxylation at the positions ortho to the C4 carbon atom. For 4-chloro- and 4-cyanofluorobenzene, the observed regioselectivity of aromatic hydroxylation correlated with the regioselectivity predicted on the basis of the frontier orbital d. distribution. In contrast, a bromine and iodine substituent affected the hydroxylation at the adjacent ortho carbon centers, reducing it to resp. 40 and 6% of the calculated intrinsic reactivity of the carbon centers. Addnl. experiments were performed to investigate whether the regioselectivity of the aromatic hydroxylation of the C4-substituted fluorobenzene model compounds was influenced by changes in the cytochrome P 450 enzyme pattern. Results obtained demonstrate that for these relatively small substrates the regioselectivity of their hydroxylation was not significantly influenced by several cytochrome P 450 inducers. This suggests that the active sites of the cytochromes P 450 catalyzing the aromatic hydroxylation do not impose a stereoselective orientation of the aromatic rings with respect to the iron-oxo porphyrin reaction center. Thus, the working hypothesis for addnl. experiments was that the deviations for the regioselectivity of aromatic hydroxylation observed for 4-bromo- and 4-iodofluorobenzene may be ascribed to steric hindrance by the bromine and iodine substituents hampering the attack of the cytochrome P 450 iron-oxo species on the adjacent carbon centers in the benzene derivative This working hypothesis was further tested by investigating whether useful steric correction factors could be derived from the results obtained with the series C4-substituted fluorobenzenes. These correction factors should make it possible to correct calculated relative reactivities of carbon sites for steric hindrance by substituents positioned ortho with respect to the carbon to be hydroxylated. This will make it possible to better explain and predict the regioselectivities for other chlorine-, bromine-, iodine-, and cyano-containing fluorobenzenes. The in vivo regioselectivity of aromatic ring hydroxylation of a series of five chlorine-, bromine-, iodine-, or cyano-containing fluorobenzenes did not correlate with the noncorrected calculated reactivities (r = 0.49). However, upon correction of the calculated reactivity values by using the steric correction factors, a correlation between the observed and calculated regioselectivity for the substrates of the present study was obtained (r = 0.91). Together these results strongly indicate that for the fluorobenzenes studied the main factors directing the regioselectivity of their aromatic hydroxylation are (i) the nucleophilic chem. reactivity of the site to be hydroxylated and (ii) the steric influence of the substituent ortho with respect to the site of hydroxylation. This latter effect appears to be negligible for a fluorine, chlorine, and cyano substituent but significant for a bromine and iodine substituent.

Chemical Research in Toxicology published new progress about Frontier molecular orbital. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Van de Poel, Herve; Guillaumet, Gerald; Viaud-Massuard, Marie-Claude published the artcile< Synthesis of 6,7,8,9-tetrahydropyrido[2,3-b]indolizine and 3,4-dihydro-2H-pyrido[2',3':4,5]pyrrolo[2,1-b][1,3]oxazine derivatives as new melatonin receptor ligands>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is tricyclic azaindolic hormone melatonin hydropyridoindolizine hydropyridopyrrolooxazine synthesis; melatonin receptor ligand tetrahydropyridoindolizine dihydropyridopyrrolooxazine synthesis; bromopropyloxopyrrolopyridine intramol homolytic cyclization hydropyridoindolizine hydropyridopyrrolooxazine synthesis; hydropyridoindolizine hydropyridopyrrolooxazine synthesis melatonin receptor ligand intramol homolytic cyclization.

The synthesis of new tricyclic azaindolic analogs of the hormone melatonin is described. Treatment of 1-(4-bromobutyl)pyrrolo[3,2-b]pyridine derivative with tributyltin hydride and AIBN results in radical cyclisation to give the 6,7,8,9-tetrahydropyrido[2,3-b]indolizine ring system. A new synthetic approach of pyridopyrrolo[2,1-b][1,3]oxazine moiety is shown to be accomplished readily from 1-(3-bromopropyl)-2-oxopyrrolopyridine derivative with sodium hydride in N,N-dimethylformamide.

Tetrahedron Letters published new progress about Radical cyclization. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Zhang, Xiaojie; Wang, Rubing; Perez, German Ruiz; Chen, Guanglin; Zhang, Qiang; Zheng, Shilong; Wang, Guangdi; Chen, Qiao-Hong published the artcile< Design, synthesis, and biological evaluation of 1,9-diheteroarylnona-1,3,6,8-tetraen-5-ones as a new class of anti-prostate cancer agents>, Product Details of C19H34O2, the main research area is diheteroarylnonatetraenone antitumor prostate cancer; Cell apoptosis; Cell cycle regulation; Cell proliferation; Curcumin; Heteroaromatic ring; Prostate cancer.

In search of more effective chemotherapeutics for the treatment of castration-resistant prostate cancer and inspired by curcumin analogs, twenty five (1E,3E,6E,8E)-1,9-diarylnona-1,3,6,8-tetraen-5-ones bearing two identical terminal heteroaromatic rings have been successfully synthesized through Wittig reaction followed by Horner-Wadsworth-Emmons reaction. Twenty-three of them are new compounds The WST-1 cell proliferation assay was employed to assess their antiproliferative effects toward both androgen-sensitive and androgen-insensitive human prostate cancer cell lines. Eighteen out of twenty-five synthesized compounds possess significantly improved potency as compared with curcumin. The optimal compound, I, is 14- to 23-fold more potent than curcumin in inhibiting prostate cancer cell proliferation. It can be concluded from the data that 1,9-diarylnona-1,3,6,8-tetraen-5-one can serve as a new potential scaffold for the development of antiprostate cancer agents and that pyridine-4-yls and quinolin-4-yl act as optimal heteroaromatic rings for the enhanced potency of this scaffold. Two of the most potent compounds, II and III, effectively suppress PC-3 cell proliferation by activating cell apoptosis and by arresting cell cycle in the G0/G1 phase.

Bioorganic & Medicinal Chemistry published new progress about Antitumor agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Product Details of C19H34O2.

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

Kumar, B. V. V. S. Pavan; Salikolimi, Krishnachary; Eswaramoorthy, M. published the artcile< Glucose- and pH-Responsive Charge-Reversal Surfaces>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is glucose pH responsive charge reversal silica surface desorption chromophore.

We have shown a pH- and glucose-responsive charge reversal on silica surface through heterogeneous functionalization utilizing amines and boronic acid moieties. The dual responsiveness of the charge reversal has been unambiguously demonstrated through the desorption of charged chromophores. Interestingly, we observed a concentration-dependent desorption response to glucose at physiol. relevant levels.

Langmuir published new progress about Amines Role: RGT (Reagent), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Chun, Jaemoo; Lee, So Min; Ahn, You Mee; Baek, Min-Gyung; Yi, Hana; Shin, Sarah; Jung, Jeeyoun published the artcile< Modulation of the gut microbiota by Sihocheonggan-Tang shapes the immune responses of atopic dermatitis>, Electric Literature of 112-63-0, the main research area is TNFalpha IFNgamma sihocheonggan tang gut microbiota atopic dermatitis; Sihocheonggan-Tang; atopic dermatitis; gut microbiome; immune response; short-chain fatty acids.

Atopic dermatitis (AD) is a chronic inflammatory skin disease characterized by complex immune dysregulation and closely related to the gut microbiome. The present study investigated the microbiome-mediated effect of Sihocheonggan-Tang (SHCGT) on AD-like symptoms induced by 2,4-dinitrochlorobenzene (DNCB) in BALB/c mice. DNCB was applied regularly to the ear and dorsal skin of BALB/c mice, and SHCGT was administered orally daily for 2 wk. The composition of the gut microbiota was analyzed using 16S rRNA sequencing, and the effect of gut microbiome-derived metabolites, specifically short-chain fatty acids (SCFAs), was evaluated in tumor necrosis factor-alpha (TNF-α)- and interferon-gamma (IFN-γ)-treated HaCaT cells. SHCGT alleviated DNCB-induced symptoms of AD and the immune response to AD by decreasing the plasma IgE level and splenic interleukin-4, interleukin-10, TNF-α, and IFN-γ levels. The gut microbiome composition and the damaged gut epithelial barrier in mice with AD were also significantly altered by SHCGT, and the reduced SCFA levels therein were elevated. We found that SFCAs directly inhibited the mRNA expression of IL-6 and ICAM-1 in TNF-α- and INF-γ-treated HaCaT cells. The finding that SHCGT regulates the gut microbiome and improves DNCB-induced AD in mice suggests that this herbal medicine has therapeutic potential in patients with AD.

Frontiers in Pharmacology published new progress about Atopic dermatitis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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

Wang, Jian; Xie, Hexin; Li, Hao; Zu, Liansuo; Wang, Wei published the artcile< A highly stereoselective hydrogen-bond-mediated Michael-Michael cascade process through dynamic kinetic resolution>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is thiochroman preparation mercaptocinnamate nitroalkene cinchona thiourea catalyst.

The title reaction, which is efficiently catalyzed by a cinchona alkaloid thiourea affords direct access to thiochromanes in high efficiency. The reaction features a new activation mode of organocatalytic dynamic kinetic resolution involving a Michael-retro-Michael-Michael-Michael cascade.

Angewandte Chemie, International Edition published new progress about Alkenes, nitro Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Trentin, Riccardo; Custodio, Luisa; Rodrigues, Maria Joao; Moschin, Emanuela; Sciuto, Katia; da Silva, Jose Paulo; Moro, Isabella published the artcile< Total Phenolic Levels, In Vitro Antioxidant Properties, and Fatty Acid Profile of Two Microalgae, Tetraselmis marina Strain IMA043 and Naviculoid Diatom Strain IMA053, Isolated from the North Adriatic Sea>, HPLC of Formula: 112-63-0, the main research area is Tetraselmis marina Naviculoid Diatom fatty acid phenol antioxidant property; biodiesel; microalgal biotechnology; natural antioxidants.

This work studied the potential biotechnol. applications of a naviculoid diatom (IMA053) and a green microalga (Tetraselmis marina IMA043) isolated from the North Adriatic Sea. Water, methanol, and dichloromethane (DCM) extracts were prepared from microalgae biomass and evaluated for total phenolic content (TPC) and in vitro antioxidant properties. Biomass was profiled for fatty acid Me esters (FAME) composition The DCM extracts had the highest levels of total phenolics, with values of 40.58 and 86.14 mg GAE/g dry weight (DW in IMA053 and IMA043, resp.). The DCM extracts had a higher radical scavenging activity (RSA) than the water and methanol ones, especially those from IMA043, with RSAs of 99.65% toward 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)diammonium salt (ABTS) at 10 mg/mL, and of 103.43% against 2,2-diphenyl-1-picrylhydrazyl (DPPH) at 5 mg/mL. The DCM extract of IMA053 displayed relevant copper chelating properties (67.48% at 10 mg/mL), while the highest iron chelating activity was observed in the water extract of the same species (92.05% at 10 mg/mL). Both strains presented a high proportion of saturated (SFA) and monounsaturated (MUFA) fatty acids. The results suggested that these microalgae could be further explored as sources of natural antioxidants for the pharmaceutical and food industry and as feedstock for biofuel production

Marine Drugs published new progress about Antioxidants. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

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