Tag: M.W=250-300

Smith, J. R.; Ratcliffe, N. M.; Campbell, S. A. published the artcile< Polyheterocycles containing alkene spacer linkages. Part II. Synthesis and polymerization of (E)-2-styrylthiophenes and (E)-2-styrylpyrrole>, Product Details of C19H34O2, the main research area is styrylthiophene polymer preparation elec conductivity; styrylpyrrole polymer preparation elec conductivity.

A number of (E)-2-styrylthiophenes, exhibiting a range of electronic effects, and (E)-2-styrylpyrrole were synthesized and their electrochem. behavior investigated. The films, produced by anodic electropolymerization, were redox inactive and exhibited conductivities of the order of 10-6 S cm-1. The nature of the films was investigated by electrochem., spectroscopic and microscopic techniques. The low conductivities exhibited by these films may be attributed to oxidation of the alkene spacer linkage resulting in a crosslinked polymeric matrix. Solid-state NMR, FTIR and photoacoustic-IR confirmed the presence of saturated carbon atoms which would inevitably lead to a decrease in conjugation length. However, in all cases, stable coherent films were obtained from the electropolymerization reaction and an exceptionally smooth film of 20 μm in thickness could be grown from (E)-2-styrylpyrrole on ITO glass.

Synthetic Metals published new progress about Electric conductivity. 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

Lv, Leiyang; Li, Zhiping published the artcile< Cycloalkylation of C(sp3)-H Bond with Neighboring Carboxylic Acid as Traceless Activating Group>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is cycloalkylation carbon hydrogen bond carboxylic acid traceless activating group.

Selective functionalization of an inert C(sp3)-H bond is one of the cutting-edge challenges in chem. synthesis. A novel strategy for selective C(sp3)-H bond cycloalkylation is developed with neighboring carboxylic acid as a traceless activating group. Primary and secondary alkyl carboxylic acids undergo decarboxylation/α-C(sp3)-H cleavage/cycloalkylation to give the five-membered cyclization products, while tertiary acids undergo decarboxylation/β-C(sp3)-H cleavage/cycloalkylation to generate the six-membered cyclization products.

Journal of Organic Chemistry published new progress about Aliphatic acids Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Dong, Xiuqin; Zhao, Yu-Ming; Sun, Jianwei published the artcile< N-Heterocyclic carbene (NHC) catalyzed synthesis of α,α-difluoro esters>, Computed Properties of 112-63-0, the main research area is methoxycarbonyloxy enal redox fluorination heterocyclic carbene catalyst; fluoro ester preparation.

A process for the synthesis of α,α-difluoro esters by NHC-catalyzed fluorination starting is described. The internal redox process exhibits good efficiency, selectivity, and functional-group compatibility. It provides an alternative strategy for the formation of the useful gem-difluoromethylene unit in organic mols.

Synlett published new progress about Carbonates Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.

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

Bliman, David; Pettersson, Mariell; Bood, Mattias; Groetli, Morten published the artcile< 8-Bromination of 2,6,9-trisubstituted purines with pyridinium tribromide>, Computed Properties of 112-63-0, the main research area is purine bromination pyridinium tribromide; bromopurine preparation.

2,6,9-Trisubstituted purines are brominated in high yields using pyridinium tribromide as the brominating reagent. This procedure works excellently for electron-rich purines having electron-donating substituents at the 2- and 6-positions. The use of pyridinium tribromide, a crystalline alternative to Br2, improves the bromination procedure for this type of substrate as the reagent is easy to handle and work-up and purification procedures are simplified.

Tetrahedron Letters published new progress about Bromination. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.

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

Guo, Wei; Yang, Xiao-Guang; Shi, Yu-Lin; Wang, Hong published the artcile< The effects and mechanism of paeoniflorin in promoting osteogenic differentiation of MC3T3-E1.>, SDS of cas: 112-63-0, the main research area is MC3T3-E1 cells; Osteoclastogenesis; Osteogenic differentiation; Paeoniflorin; Wnt/β-catenin pathways.

BACKGROUND: The incidence of osteoporosis and osteoporotic fractures is increasing every year. Traditional Chinese Medicine (TCM) can shed new light on the treatment of osteoporosis. This study aimed to explore the role and mechanism of paeoniflorin in promoting osteogenic differentiation of an osteoblast precursor cell line (MC3T3-E1). METHODS: MC3T3-E1 cells were cultured in osteogenic induction medium (OIM) and OIM combined with different concentrations of paeoniflorin. The optimal dose of paeoniflorin was assessed by a cell counting kit-8 (CCK-8) assay. Then, alkaline phosphatase (ALP) and Alizarin Red S (ARS) staining were performed to assess the osteogenic capacity of paeoniflorin. The transcription of osteogenic genes and the expression of osteogenic proteins were assessed by RT-PCR and Western blotting, respectively. The transcription of Wnt/β-catenin signaling pathway genes and proteins was assessed by RT-PCR and Western blotting, respectively. Finally, Dickkopf-1 (DKK-1), a Wnt/β-catenin signaling pathway inhibitor, was used to identify whether the Wnt/β-catenin signaling pathway was involved in the osteogenic differentiation of paeoniflorin. Osteoclastogenesis in RAW264.7 cells was identified by tartrate-resistant acid phosphatase (TRAP) staining. RESULTS: At concentrations ranging from 0.1 to 100 μM, paeoniflorin was not cytotoxic to MC3T3-E1 cells. Paeoniflorin significantly increased the osteogenic differentiation of MC3T3-E1 cells in a dose-dependent manner. Moreover, paeoniflorin significantly increased osteogenic differentiation gene and protein expression. Through bioinformatic analysis, paeoniflorin-affected genes were found to be involved in different signaling pathways, such as the Wnt/β-catenin signaling pathway. Paeoniflorin enhanced β-catenin and CyclinD1 expression compared with that of the control groups. DKK-1 partially reversed the promoting effects of paeoniflorin in promoting osteogenic differentiation of MC3T3-E1 cells. Moreover, paeoniflorin inhibited the osteoclastogenesis of RAW264.7 cells. CONCLUSION: Paeoniflorin promotes osteogenic differentiation in MC3T3-E1 cells by regulating the Wnt/β-catenin pathway. Paeoniflorin is a potential therapeutic agent for the treatment of osteoporosis.

Journal of orthopaedic surgery and research published new progress about 112-63-0. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, SDS of cas: 112-63-0.

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

Ul Lah, Hafiz; Mir, Shabir Ahmad; Hussain, Gulzar; Wani, Rafiq Ahmad; Yousuf, Syed Khalid published the artcile< Facile NBS/DMSO mediated dibromination of olefins including selected natural products and glycals>, SDS of cas: 4098-06-0, the main research area is alkene bromosuccinimide chemoselective diastereoselective dibromination; organodibromide preparation.

A highly chemo- and diastereoselective vic-dibromination of olefins was developed. The process employed a readily available N-Bromosuccinimide (NBS)/DMSO reagent system as a bromine source. High substrate scope, simple reaction conditions, application to natural products and glycals makes the process very attractive.

Journal of Chemical Sciences (Berlin, Germany) published new progress about Alkenes Role: RCT (Reactant), RACT (Reactant or Reagent). 4098-06-0 belongs to class esters-buliding-blocks, and the molecular formula is C12H16O7, SDS of cas: 4098-06-0.

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

Hyodo, Isao; Tobisu, Mamoru; Chatani, Naoto published the artcile< Catalytic Arylation of a C-H Bond in Pyridine and Related Six-Membered N-Heteroarenes Using Organozinc Reagents>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is nitrogen heteroarene diphenylzinc direct arylation nickel; aryl nitrogen heteroarene preparation; nickel direct arylation catalyst.

Despite significant advances in the catalytic direct arylation of heteroarenes, the application of this reaction to pyridines has been met with limited success. An oxidative nucleophilic arylation strategy has been developed to overcome this problem. Pyridine, pyrazine, quinolone, and related electron-deficient N-heteroarenes can be arylated at the most electrophilic site using the developed nickel-catalyzed reaction. This protocol serves as a complementary method to catalytic direct arylation reactions.

Chemistry – An Asian Journal published new progress about Arylation. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Chen, Jia-Shu; Clarke, Ross; Haddad, Alexander F.; Wang, Elaina J.; Lacroix, Michel; Sarkar, Indra Neil; Zand, Ramin; Chen, Elizabeth S.; Toms, Steven A. published the artcile< The effect of levetiracetam treatment on survival in patients with glioblastoma: a systematic review and meta-analysis>, HPLC of Formula: 112-63-0, the main research area is human glioblastoma levetiracetam treatment meta analysis; Anti-epileptic; Glioblastoma; Levetiracetam; Survival; Temozolomide.

Levetiracetam (LEV) is an anti-epileptic drug (AED) that sensitizes glioblastoma (GBM) to temozolomide (TMZ) chemotherapy by inhibiting O6-methylguanine-DNA methyltransferase (MGMT) expression. Adding LEV to the standard of care (SOC) for GBM may improve TMZ efficacy. This study aimed to pool the existing evidence in the literature to quantify LEV’s effect on GBM survival and characterize its safety profile to determine whether incorporating LEV into the SOC is warranted. A search of CINAHL, Embase, PubMed, and Web of Science from inception to May 2021 was performed to identify relevant articles. Hazard ratios (HR), median overall survival, and adverse events were pooled using random-effect models. Meta-regression, funnel plots, and the Newcastle-Ottawa Scale were utilized to identify sources of heterogeneity, bias, and statistical influence. From 20 included studies, 5804 GBM patients underwent meta-anal., of which 1923 (33%) were treated with LEV. Administration of LEV did not significantly improve survival in the entire patient population (HR 0.89, p = 0.094). Significant heterogeneity was observed during pooling of HRs (I2 = 75%, p < 0.01). Meta-regression determined that LEV treatment effect decreased with greater rates of MGMT methylation (RC = 0.03, p = 0.02) and increased with greater proportions of female patients (RC = - 0.05, p = 0.002). Concurrent LEV with the SOC for GBM did not increase odds of adverse events relative to other AEDs. Levetiracetam treatment may not be effective for all GBM patients. Instead, LEV may be better suited for treating specific mol. profiles of GBM. Further studies are necessary to identify optimal GBM candidates for LEV. Journal of Neuro-Oncology published new progress about Anticonvulsants. 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

Guo, Kedong; Zhang, Yingbo; Li, Libo; Zhang, Jingyan; Rong, Hua; Liu, Deshui; Wang, Junping; Jin, Ming; Luo, Nan; Zhang, Xiaojie published the artcile< Neuroprotective effect of paeoniflorin in the mouse model of Parkinson′s disease through α-synuclein/protein kinase C δ subtype signaling pathway>, Category: esters-buliding-blocks, the main research area is Parkinsons disease alpha synuclein protein kinase C paeoniflorin neuroprotective.

Paeoniflorin, an active component of Radix Paeoniae Alba, has a neuroprotective effect in Parkinson′s animal models. However, its mechanism of action remains to be determined In this study, we hypothesized that the neuroprotective effect of paeoniflorin occurs through the α-synuclein/protein kinase C δ subtype (PKC-δ) signaling pathway. We tested our hypothesis in the 1-methyl-4-phenyl-1, 2, 3, 6-tetrahydropyridine (MPTP)-induced mouse model of Parkinson′s disease. We evaluated the effects of paeoniflorin on the expression levels of signal components of the α-synuclein/PKC-δ pathway, cellular apoptosis and motor performance. Our results demonstrated that paeoniflorin restored the motor performance impairment caused by MPTP, inhibited apoptosis, and protected the ultrastructure of neurons. Paeoniflorin treatment also resulted in the dose-dependent upregulation of an antiapoptotic protein, B-cell lymphoma-2, at the mRNA and protein levels, similar to the effects of the pos. control, selegiline. In contrast, paeoniflorin treatment downregulated the expression of pro-apoptotic proteins BCL2-Associated X2, α-synuclein, and PKC-δ at the mRNA and protein levels, as well as the level of the activated form of nuclear factor kappa B (p-NF-κB p65). Thus, our results showed that paeoniflorin exerts its neuroprotective effect by regulating the α-synuclein/PKC-δ signaling pathway to reduce neuronal apoptosis.

NeuroReport published new progress about Antiapoptotic proteins Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Cao, Xiyue; Xu, Hui; Li, Fosheng; Zou, Yijun; Ran, Yulu; Ma, Xiaorui; Cao, Yu; Xu, Qingrui; Qiao, Dairong; Cao, Yi published the artcile< One-step direct transesterification of wet yeast for biodiesel production catalyzed by magnetic nanoparticle-immobilized lipase>, Related Products of 112-63-0, the main research area is lipase wet yeast biodiesel magnetic nanoparticle transesterification.

To develop a method for direct transesterification of wet yeast using immobilized lipase, the oleaginous yeast Saitozyma podzolica Zwy-2-3 and the lipase producing Burkholderia pyrrolica WZ10-3 were used as materials for production of biodiesel. Fe3O4@SiO2-CHO prepared by modifying Fe3O4 with TEOS, APTES and glutaraldehyde. The biocatalysts covalently cross-linked with WZ10-3 lipase by Fe3O4@SiO2-CHO were characterized by FTIR, XRD and TEM. When the enzyme dosage, glutaraldehyde concentration, temperature and time were 30.22 mL, 2.0%, 40°C and 4 h, the immobilized lipase activity and immobilization rate reached 10038.0 U/g and 96.9%, resp. The optimum temperatures for immobilized and free lipase were 60 degrees and 40 degrees. The immobilized enzyme still had 80% enzymic activity after 48 d storage at 4°C. The optimized conditions for the direct conversion of immobilized lipase to esterified wet yeast (one-step) were: enzyme dosage 2.5 g, reaction temperature 35°C; water content 15%; and molar ratio of n-hexane to methanol 3: 1. The transesterification rates of one-step method for oil and biomass were 98.12% and 56.11%, resp. In contrast, the two-step method was only 88.75% and 51.21%. The immobilized enzyme had 90% enzyme activity after 10 times of reuse.

Renewable Energy published new progress about Biodiesel fuel. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Related Products of 112-63-0.

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