Month: November 2022

Hong, Chao; Yu, Shuling; Liu, Zhanxiang; Zhang, Yuhong published the artcile< Rh-Catalyzed Coupling of Acrylic/Benzoic Acids with α-Diazocarbonyl Compounds: An Alternative Route for α-Pyrones and Isocoumarins>, Formula: C11H12O3, the main research area is alkyl oxo aryl pyran carboxylate preparation; acrylic acid alpha diazocarbonyl compound coupling catalyst rhodium; isochromene alkyl oxo carboxylate preparation; aryl carboxylic acid alpha diazocarbonyl compound coupling catalyst rhodium.

A coupling of acrylic acids/benzoic acids with α-diazocarbonyl compounds had been realized by a combined catalytic system of rhodium catalyst and Zn(OAc)2 additive. The presence of Zn(OAc)2 obviously accelerates the C(sp2)-H activation and destructed the formation of carboxylic ester that was formed via a nucleophilic O-H insertion to metal carbenoid. The procedure featured mild reaction conditions and broad substrate scope, providing a straightforward approach to the synthesis of α-pyrones I [R1 = Me, Ph, Bn, etc.; R2 = H, Me, Ph; R1R2 = (CH2)4; R3 = Me, Et, allyl, t-Bu, R4 = Me, Et, Ph, etc.] and isocoumarins II [R = H, 8-Me, 8-Me-6-MeO, etc.] without the transformation of carboxylic acids to the corresponding amides.

Organic Letters published new progress about 1,3-Dicarbonyl compounds Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, Formula: C11H12O3.

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

Bachler, Patricia R.; Forry, Kaitlyn E.; Sparks, Chelsea A.; Schulz, Michael D.; Wagener, Kenneth B.; Sumerlin, Brent S. published the artcile< Modular segmented hyperbranched copolymers>, Formula: C9H3F5O2, the main research area is RAFT polymerization hyperbranched copolymer.

Modular segmented hyperbranched polymers, amenable to facile post-polymerization functionalization, were created via two distinct approaches. Self-condensing vinyl polymerization via reversible addition-fragmentation chain transfer (RAFT) polymerization and RAFT polymerization with a divinyl comonomer were employed to create well-defined highly branched materials containing activated esters amenable to highly efficient functionalization in a modular manner.

Polymer Chemistry published new progress about Branched polymers, hyperbranched dendritic polymers Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Formula: C9H3F5O2.

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

Adhiputra, Randy; Utami, Maisari; Suyono, Eko Agus; Budiman, Arief; Hariani, Poedji Loekitowati; Pratiwi, Ani Setyo; Wijaya, Karna published the artcile< Simultaneous extraction and in-situ transesterification of Chlorella vulgaris using microwave-assisted method for biodiesel production>, SDS of cas: 112-63-0, the main research area is extraction Chlorella microwave biodiesel.

This research aims to study the simultaneous extraction and transesterification of Chlorella vulgaris (C. vulgaris) using microwave irradiation with methanol as solvent and potassium hydroxide (KOH) as catalyst. The microwave-assisted insitu transesterification of C. vulgaris is assessed at various ratios of biomass-to-methanol, reaction times, and catalyst concentrations during the centrifugation and evaporation process. Gas chromatog.-mass spectrometry (GC-MS) anal. is performed to confirm fatty acid Me ester (FAME) composition Biodiesel preparation is carried out by simultaneous extraction and transesterification of microalgae from C. vulgaris. The product is then characterized using Fourier transform IR spectroscopy (FTIR) and proton NMR (1H-NMR); microalgae are observed using SEM (SEM). The highest amount of FAME is obtained at a biomass-to-methanol ratio of 1:12, reaction time of 40 min, and catalyst concentration of 2 wt%. Biodiesel shows conversion to about 77.64% of Me ester (Me myristate, Me palmitoleate, Me linoleate, Me oleate, Me arachidonate, and Me 5,8,11,14,17-eicosapentanoate).

Han’guk Chaelyo Hakhoechi published new progress about Biodiesel fuel. 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

Zhang, Tong; Ding, Haibo; An, Minghui; Wang, Xiaonan; Tian, Wen; Zhao, Bin; Han, Xiaoxu published the artcile< Factors associated with high-risk low-level viremia leading to virologic failure: 16-year retrospective study of a Chinese antiretroviral therapy cohort>, Application of C19H34O2, the main research area is tenofovir lamivudine antiretroviral agent viremia virol failure population; First-line regimen; HIV-1; Long-term antiretroviral therapy; Low-level viremia; Lower-income countries; Viral load assay; Virologic failure.

Abstract: Background: Low level viremia (LLV) often occurs during antiretroviral therapy (ART) against HIV-1. However, whether LLV increases the risk of virol. failure (VF) is controversial because of the non-uniform definitions of LLV and VF. Methods: A long-term first line regimen ART cohort from 2002 to 2018 from Shenyang, northeast China, was retrospectively studied. All participants were followed up every 3 to 6 mo to evaluate the treatment effect. The high-risk LLV subgroups leading to VF (with strict standards) were explored with Cox proportional hazards model and linear mixed-effect model. The association factors of high-risk LLV were further explored using multivariate logistic regression analyses. Results: A total of 2155 HIV-1 infected participants were included; of these, 38.7% showed LLV. Both high level LLV (HLLV) and any other level LLV coupled with high level blip (HLB) showed higher risk of VF (hazards ratios, HRHLLV = 5.93, and HRHLB = 2.84, p < 0.05 resp.). Moreover, HR increased with prolonged duration of LLV. Independent factors associated with high-risk LLV included the zenith baseline viral load (VL) above 6 log copies/mL (aOR = 3.49, p = 0.002), nadir baseline CD4 + T cell counts below 200 cells/mm3 (aOR = 1.78, p = 0.011), Manchu (aOR = 2.03, p = 0.003), ART over 60 mo (aOR = 1.81, p = 0.004), AZT + 3TC + NVP (aOR = 2.26, p < 0.001) or DDI-based regimen (aOR = 9.96, p = 0.002), and subtype B' infection (aOR = 8.22, p = 0.001). Conclusions: In case of VF with strict standards, high-risk LLV leading to VF includes VL above 400 copies/mL, occurring at least once. Serious laboratory indicators or advanced stage of infection, long term ART and subtype B' infection might also predict the occurrence of high-risk LLV. BMC Infectious Diseases published new progress about Antiviral agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

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

Li, Xuejing; Deng, Xingwang; Coyne, Anthony G.; Srinivasan, Rajavel published the artcile< meta-Nitration of Arenes Bearing ortho/para Directing Group(s) Using C-H Borylation>, HPLC of Formula: 112-63-0, the main research area is meta nitroarene regioselective preparation; arene borylation nitration tandem iridium catalyst copper; C−H borylation; copper catalysis; nitration; nitro(hetero)arenes; one-pot reactions.

The meta-nitration of arenes bearing ortho/para directing group(s) using the iridium-catalyzed C-H borylation reaction followed by a newly developed copper(II)-catalyzed transformation of the crude aryl pinacol boronate esters into the corresponding nitroarenes RNO2 [R = 4,5-di-ClC6H3, 3,4-di-BrC6H3, 5-Cl-3-pyridyl, etc.] in a one-pot fashion was reported. The reaction tolerated a wide array of ortho/para-directing groups, such as -F, -Cl, -Br, -CH3, -Et, -iPr -OCH3 and -OCF3. It also provided regioselective access to the nitro derivatives of π-electron-deficient heterocycles, such as pyridine and quinoline derivatives The application of this method was demonstrated in the late-stage modification of complex mols. and also in the gram-scale preparation of an intermediate en route to the FDA-approved drug Nilotinib. Finally, showed that the nitro product obtained by this strategy could also be directly converted to the aniline or hindered amine through Baran’s amination protocol.

Chemistry – A European Journal published new progress about Aromatic compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Alanazi, Rahmah; Nakatogawa, Hirokazu; Wang, Haitao; Ji, Delphine; Luo, Zhengwei; Golbourn, Brian; Feng, Zhong-Ping; Rutka, James T; Sun, Hong-Shuo published the artcile< Inhibition of TRPM7 with carvacrol suppresses glioblastoma functions in vivo.>, Synthetic Route of 112-63-0, the main research area is TRPM7; carvacrol; drug target; glioblastoma; in vivo; ion channels.

Glioblastoma (GBM) is the most prevalent and aggressive type of primary human brain tumours originating in the central nervous system. Despite the fact that current treatments involve surgery, chemotherapy (Temozolomide), and radiation therapy, the prognosis for patients diagnosed with GBM remains extremely poor. The standard treatment is not only unable to completely eradicate the tumour cells, but also tumour recurrence after surgical resection presents a major challenge. Furthermore, adjuvant therapies including radiation and chemotherapy have high cytotoxicity which causes extensive damage to surrounding healthy tissues and treatment is usually halted before GBM is fully eradicated. Finally, most GBM cases demonstrate temozolomide resistance, a common reason for GBM treatment failure. Therefore, there is an urgent need to develop a suitable alternative therapy that targets GBM specifically and has low cytotoxicity for healthy cells. We previously reported that transient receptor potential melastatin 7 (TRPM7) channels are aberrantly upregulated in GBM, and inhibition of TRPM7 reduced GBM cellular functions including proliferation, migration, and invasion. This suggests TRPM7 is a potential therapeutic target for GBM treatment. In this study, we investigated the effects of the TRPM7 inhibitor, carvacrol, on human GBM cell lines U87 and U251 in vivo. With the use of a flank xenograft GBM mouse model, we demonstrated that carvacrol significantly reduced the tumour size in both mice injected with U87 and U251 cells, decreased p-Akt protein level and increased p-GSK3β protein levels. Therefore, these results suggest that carvacrol may have therapeutic potential for GBM treatment.

The European journal of neuroscience published new progress about 112-63-0. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Synthetic Route of 112-63-0.

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

Chen, Zhiyong; Guan, Qian; Xu, Haiyan; Lei, Tingzhou; Lin, Lu; Wang, Zhiwei; He, Xiaofeng; Zhu, Jinling published the artcile< Study on the formation of ethyl levulinate from wheat straw based on a model compound>, Application In Synthesis of 112-63-0, the main research area is ethyl levulinate wheat straw glucose microcrystalline cellulose.

Glucose and microcrystalline cellulose were selected as model compounds to investigate the formation of Et levulinate (EL). Optimal glucose and microcrystalline cellulose transformation conditions resulted in yields of 41.05 weight% and 38.56 weight% for EL, 0.73 weight% and 2.63 weight% for ethyl-glucoside (EG), 0.42 weight% and 0.36 weight% for 5-hydroxymethylfurfural (HMF), and 2.18 weight% and 2.16 weight% for 5-ethoxy Me furfural (EMF), resp. Increasing the reaction time and temperature resulted in an optimized yield of EL. These increases also resulted in decreased EG and EMF yield, and the change trend of HMF was not significant. EMF, HMF, and EG are intermediates in the formation of EL. Finally, we concluded that biomass conversion occurs first through cellulose degradation to glucose followed by the production of EG through alcoholysis and hydrolysis and dehydration of the reaction products to produce EL.

Journal of Biobased Materials and Bioenergy published new progress about Liquefaction. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application In Synthesis of 112-63-0.

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

Nogales-Delgado, Sergio; Encinar Martin, Jose Maria published the artcile< Cardoon biolubricant through double transesterification: Assessment of its oxidative, thermal and storage stability>, Electric Literature of 112-63-0, the main research area is cardoon biolubricant transesterification oxidation thermal storage stability.

Biolubricants could be a suitable replacement for industrial lubricants, due to their good performance and environmental-friendly quality, showing better flash and combustion points. However, depending on the raw material, the quality of biolubricants can vary, especially concerning oxidative and storage stability. The aim of this research work was to assess the stability of cardoon biolubricant, paying attention to oxidation and thermal and storage stability (by using the Rancimat method, thermogravimetry and viscosity during storage, resp.). The high linoleic acid content in cardoon oil (exceeding 25%) could influence the low oxidative stability of cardoon biolubricant (3 h), implying changes in quality parameters during storage (viscosity increased above 15% and viscosity index decreased about 23%). Thus, the use of antioxidants is advisable to keep its properties over time.

Materials Letters published new progress about Artichoke. 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

Basarab, Gregory S.; Brassil, Patrick; Doig, Peter; Galullo, Vincent; Haimes, Howard B.; Kern, Gunther; Kutschke, Amy; McNulty, John; Schuck, Virna J. A.; Stone, Gregory; Gowravaram, Madhusudhan published the artcile< Novel DNA Gyrase Inhibiting Spiropyrimidinetriones with a Benzisoxazole Scaffold: SAR and in Vivo Characterization>, Electric Literature of 112-63-0, the main research area is benzisoxazole spiropyrimidinetrione preparation DNA gyrase inhibitor scaffold SAR.

The compounds described herein with a spirocyclic architecture fused to a benzisoxazole ring represent a new class of antibacterial agents that operate by inhibition of DNA gyrase as corroborated in an enzyme assay and by the inhibition of precursor thymidine into DNA during cell growth. Activity resided in the configurationally lowest energy (2S,4R,4aR) diastereomer. Highly active compounds against Staphylococcus aureus had sufficiently high solubility, high plasma protein free fraction, and favorable pharmacokinetics to suggest that in vivo efficacy could be demonstrated, which was realized with compound I in S. aureus mouse infection models. A high drug exposure NOEL on oral dosing in the rat suggested that a high therapeutic margin could be achieved. Importantly, I was not cross-resistant with other DNA gyrase inhibitors such as fluoroquinolone and aminocoumarin antibacterials. Hence, this class shows considerable promise for the treatment of infections caused by multidrug resistant bacteria, including S. aureus.

Journal of Medicinal Chemistry published new progress about Antibacterial agents. 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

Pardieu, Bryann; Pasanisi, Justine; Ling, Frank; Dal Bello, Reinaldo; Penneroux, Justine; Su, Angela; Joudinaud, Romane; Chat, Laureen; Wu, Hsin Chieh; Duchmann, Matthieu; Sodaro, Gaetano; Chauvel, Clementine; Castelli, Florence A.; Vasseur, Loic; Pacchiardi, Kim; Belloucif, Yannis; Laiguillon, Marie-Charlotte; Meduri, Eshwar; Vaganay, Camille; Alexe, Gabriela; Berrou, Jeannig; Benaksas, Chaima; Forget, Antoine; Braun, Thorsten; Gardin, Claude; Raffoux, Emmanuel; Clappier, Emmanuelle; Ades, Lionel; de The, Hugues; Fenaille, Francois; Huntly, Brian J.; Stegmaier, Kimberly; Dombret, Herve; Fenouille, Nina; Lobry, Camille; Puissant, Alexandre; Itzykson, Raphael published the artcile< Cystine uptake inhibition potentiates front-line therapies in acute myeloid leukemia>, Reference of 347174-05-4, the main research area is cystine acute myeloid leukemia therapy.

By querying metabolic pathways associated with leukemic stemness and survival in multiple AML datasets, we nominated SLC7A11 encoding the xCT cystine importer as a putative AML dependency. Genetic and chem. inhibition of SLC7A11 impaired the viability and clonogenic capacity of AML cell lines in a cysteine-dependent manner. Sulfasalazine, a broadly available drug with xCT inhibitory activity, had anti-leukemic activity against primary AML samples in ex vivo cultures. Multiple metabolic pathways were impacted upon xCT inhibition, resulting in depletion of glutathione pools in leukemic cells and oxidative stress-dependent cell death, only in part through ferroptosis. Higher expression of cysteine metabolism genes and greater cystine dependency was noted in NPM1-mutated AMLs. Among eight anti-leukemic drugs, the anthracycline daunorubicin was identified as the top synergistic agent in combination with sulfasalazine in vitro. Addition of sulfasalazine at a clin. relevant concentration significantly augmented the anti-leukemic activity of a daunorubicin-cytarabine combination in a panel of 45 primary samples enriched in NPM1-mutated AML. These results were confirmed in vivo in a patient-derived xenograft model. Collectively, our results nominate cystine import as a druggable target in AML and raise the possibility to repurpose sulfasalazine for the treatment of AML, notably in combination with chemotherapy.

Leukemia published new progress about Acute myeloid leukemia. 347174-05-4 belongs to class esters-buliding-blocks, and the molecular formula is C15H22N2O2, Reference of 347174-05-4.

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