Tag: M.W=250-300

Vedachalam, Seenuvasan; Zeng, Jing; Gorityala, Bala Kishan; Antonio, Meraldo; Liu, Xue-Wei published the artcile< N-Heterocyclic Carbene-Catalyzed Intramolecular Aldehyde-Nitrile Cross Coupling: An Easy Access to 3-Aminochromones>, Computed Properties of 112-63-0, the main research area is crystal mol structure amino methoxy chromenone; amino chromone preparation; heterocyclic carbene catalyzed intramol aldehyde nitrile cross coupling.

An immense effort has been made to develop an efficient strategy for the carbon-carbon bond formation between aldehyde and nitrile intramolecularly using an N-heterocyclic carbene catalyst to derive 3-aminochromone derivatives in good to excellent yields (80-95%).

Organic Letters published new progress about C-C bond formation. 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

Sadeghpour, H.; Jalilian, A. R.; Shafiee, A.; Akhlaghi, M.; Miri, R.; Mirzaei, M. published the artcile< Radiosynthesis of dimethyl-2-[18F]-(fluoromethyl)-6-methyl-4-(2-nitrophenyl)-1,4- dihydropyridine-3,5-dicarboxylate for L-type calcium channel imaging>, Computed Properties of 112-63-0, the main research area is fluorine 19 dimethylfluoromethylmethylnitrophenyl dihydropyridine dicarboxylate radiosynthesis calcium channel imaging.

Di-Me 2-(fluoromethyl)-6-methyl-4-(2-nitrophenyl)-1,4-dihydropyridine- 3,5-dicarboxylate 4a, a fluorinated nifedipine analog, has been shown to elicit significant calcium channel blocker activity using a guinea pig ileal longitudinal smooth muscle model. In order to perform biol. studies for detection of L-type calcium channel distribution, we decided to prepare the [18F]-labeled compound The latter compound was prepared in no-carrier-added (n.c.a.) form from di-Me 2-(bromomethyl)-6-methyl-4-(2-nitrophenyl)-1,4-dihydropyridine- 3,5-dicarboxylate 2 in one step at 80°C in Kryptofix[222]/K[18F]F and acetonitrile as a solvent in 15 min. Column chromatog. afforded the radiochem. pure compound in 20 min. Radiochem. purity of the 18F-nifedipine was determined by RTLC and HPLC (> 98%) and specific activity of 21-48 GBq/μmol (EOB).

Radiochimica Acta published new progress about Calcium channel blockers. 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

Precilla, Daisy S; Kuduvalli, Shreyas S; Purushothaman, Mugilarasi; Marimuthu, Parthiban; Muralidharan, Arumugam Ramachandran; Anitha, Thirugnanasambandham Sivasubramanian published the artcile< Wnt/β-catenin Antagonists: Exploring New Avenues to Trigger Old Drugs in Alleviating Glioblastoma Multiforme.>, Electric Literature of 112-63-0, the main research area is Computational analysis; Wnt signalling; drug repurposing; glioblastoma multiforme; natural compounds; temozolomide.

BACKGROUND: Glioblastoma Multiforme (GBM) is one of the most heterogeneous primary brain tumors with high mortality. In spite of the current therapeutic approaches, the survival rate remains poor, with death occurring within 12 to 15 months after the preliminary diagnosis. This warrants the need for an effective treatment modality. The Wnt/β-catenin pathway is presumably the most noteworthy pathway upregulated in almost 80% of GBM cases, contributing to tumor initiation, progression, and survival. Therefore, therapeutic strategies targeting key components of the Wnt/β-catenin cascade using established genotoxic agents like temozolomide and pharmacological inhibitors would be an effective approach to modulate the Wnt/β-catenin pathway. Recently, drug repurposing by means of effective combination therapy has gained importance in various solid tumors, including GBM, by targeting two or more proteins in a single pathway, thereby possessing the ability to overcome the hurdle implicated by chemoresistance in GBM. OBJECTIVE: In this context, by employing computational tools, an attempt has been made to find out the novel combinations against the Wnt/β-catenin signalling pathway. METHODS: We have explored the binding interactions of three conventional drugs – namely temozolomide, metformin and chloroquine – along with three natural compounds, viz. epigallocatechin gallate, naringenin and phloroglucinol, on the major receptors of Wnt/β-catenin signalling. RESULTS: It was noted that all the experimental compounds showed profound interaction with two major receptors of the Wnt/β-catenin pathway. CONCLUSION: To the best of our knowledge, this study is the first of its kind to characterize the combined interactions of the aforementioned drugs with the Wnt/β-catenin signalling in silico, and this will putatively open up new avenues for combination therapies in GBM treatment.

Current molecular pharmacology published new progress about 112-63-0. 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

Mdanda, Sipho; Ntshangase, Sphamandla; Singh, Sanil D.; Naicker, Tricia; Kruger, Hendrik G.; Baijnath, Sooraj; Govender, Thavendran published the artcile< Mass spectrometric investigations into the brain delivery of abacavir, stavudine and didanosine in a rodent model>, Formula: C19H34O2, the main research area is brain abacavir stavudine didanosine drug delivery pharmacokinetics mass spectrometry; HIV neurocognitive disorder; mass spectrometric techniques and central nervous system; nucleoside reverse transcriptase inhibitors.

HIV replication in the brain is unopposed due to reduced antiretroviral drug penetration into the central nervous system (CNS). Prevalence of HIV-associated neurocognitive disorder (HAND) has increased severely in patients living with HIV despite current treatments. The aims of this study were to evaluate the brain bio-distribution of alternative nucleoside reverse transcriptase inhibitors, abacavir, stavudine and didanosine in the CNS and to determine their localization patterns in the brain. Sprague-Dawley rats received 50 mg kg-1 single i.p dose of each drug. Mass spectrometric techniques were then used to investigate the pharmacokinetics and localization patterns of these drugs in the brain using LC-MS/MS and mass spectrometric imaging (MSI), resp. Abacavir, stavudine and didanosine reached the Brain Cmax with concentration of 831.2, 1300 and 43.37 ngmL-1, resp. Based on MSI anal. Abacavir and Stavudine were located in brain regions that are strongly implicated in the progression of HAND. Abacavir and Stavudine penetrated into CNS, reaching a Cmax that was above the IC50 for HIV (457.6 and 112.0 ngmL-1, resp.), however, it was noted ddI showed poor entry within the brain, therefore, it is recommended that this drug cannot be considered for treating CNS-HIV.

Xenobiotica published new progress about Blood plasma. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

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

Devanathan, V. C.; Bhagan, V. Umayoru; Arumugam, N. published the artcile< Bromination of trans-2e,3e-diarylcyclohexanones with bromine in carbon tetrachloride and with pyridinium hydrobromide perbromide>, Quality Control of 112-63-0, the main research area is bromination diarylcyclohexanone stereoselective; arylcyclohexanone bromination; cyclohexanone diaryl bromination.

Bromination of trans-2e,3e-diarylcyclohexanones I (R = Ph, 4-MeC6H4, 4-MeOC6H4, 3,4-Me2C6H3, 4-Me3CC6H4, CH2Ph; R1 = Ph, 4-MeC6H4; R2 = R3 = H) (II) with Br2 in CCl4 gave 41-52% 6a-bromo-2e,3e-diarylcyclohexanones I (R2 = H, R3 = Br) and up to 16% I (R2 = Br, R3 = H). However, bromination of II with pyridinium hydrobromide perbromide gave exclusively 40-50% 6e-bromo-2e,3e-diarylcyclohexanones I (R2 = Br, R3 = H).

Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry published new progress about Bromination. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

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

Aldoghachi, Asraa Faris; Aldoghachi, Ahmed Faris; Breyne, Koen; Ling, King-Hwa; Cheah, Pike-See published the artcile< Recent Advances in the Therapeutic Strategies of Glioblastoma Multiforme>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is review temozolomide antitumor Glioblastoma multiforme; Gene therapy; cancer therapy; chemotherapy; glioblastoma multiforme; immunotherapy; radiotherapy.

A review. Glioblastoma multiforme (GBM) is one of the most common, most formidable, and deadliest malignant types of primary astrocytoma with a poor prognosis. At present, the standard of care includes surgical tumor resection, followed by radiation therapy concomitant with chemotherapy and temozolomide. New developments and significant advances in the treatment of GBM have been achieved in recent decades. However, despite the advances, recurrence is often inevitable, and the survival of patients remains low. Various factors contribute to the difficulty in identifying an effective therapeutic option, among which are tumor complexity, the presence of the blood-brain barrier (BBB), and the presence of GBM cancer stem cells, prompting the need for improving existing treatment approaches and investigating new treatment alternatives for ameliorating the treatment strategies of GBM. In this review, we outline some of the most recent literature on the various available treatment options such as surgery, radiotherapy, cytotoxic chemotherapy, gene therapy, immunotherapy, phototherapy, nanotherapy, and tumor treating fields in the treatment of GBM, and we list some of the potential future directions of GBM. The reviewed studies confirm that GBM is a sophisticated disease with several challenges for scientists to address. Hence, more studies and a multimodal therapeutic approach are crucial to yield an effective cure and prolong the survival of GBM patients.

Neuroscience (Amsterdam, Netherlands) published new progress about Antitumor agents. 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

Sumabe, Balagra Kasim; Raeder, Synnove Brandt; Rost, Lisa Marie; Sharma, Animesh; Donkor, Eric S.; Mosi, Lydia; Duodu, Samuel; Bruheim, Per; Otterlei, Marit published the artcile< Nucleoside analogues are potent inducers of Pol V-mediated mutagenesis>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is DNA polymerase V mutagenesis nucleoside analog Escherichia; AMR; MDR; NA; NRTIs; Pol V; SOS; TLS; β-clamp.

Drugs targeting DNA and RNA in mammalian cells or viruses can also affect bacteria present in the host and thereby induce the bacterial SOS system. This has the potential to increase mutagenesis and the development of antimicrobial resistance (AMR). Here, we have examined nucleoside analogs (NAs) commonly used in anti-viral and anti-cancer therapies for potential effects on mutagenesis in Escherichia coli, using the rifampicin mutagenicity assay. To further explore the mode of action of the NAs, we applied E. coli deletion mutants, a peptide inhibiting Pol V (APIM-peptide) and metabolome and proteome analyses. Five out of the thirteen NAs examined, including three nucleoside reverse transcriptase inhibitors (NRTIs) and two anti-cancer drugs, increased the mutation frequency in E. coli by more than 25-fold at doses that were within reported plasma concentration range (Pl.CR), but that did not affect bacterial growth. We show that the SOS response is induced and that the increase in mutation frequency is mediated by the TLS polymerase Pol V. Quant. mass spectrometry-based metabolite profiling did not reveal large changes in nucleoside phosphate or other central carbon metabolite pools, which suggests that the SOS induction is an effect of increased replicative stress. Our results suggest that NAs/NRTIs can contribute to the development of AMR and that drugs inhibiting Pol V can reverse this mutagenesis.

Biomolecules published new progress about Antimicrobial agent resistance. 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

Hall, Jean A.; Panickar, Kiran S.; Brockman, Jeffrey A.; Jewell, Dennis E. published the artcile< Cats with Genetic Variants of AGXT2 Respond Differently to a Dietary Intervention Known to Reduce the Risk of Calcium Oxalate Stone Formation>, HPLC of Formula: 112-63-0, the main research area is calcium oxalate stone AGXT2 genetic variation food intake; AGXT2; betaine; calcium oxalate; cats; metabolomics; personalized nutrition; urine.

This study was completed to evaluate a genotype-specific nutritional intervention for reducing the risk of calcium oxalate stone formation. Serum metabolomic profiles and genotypes of 445 cats in the colony at Hill′s Pet Nutrition, Inc (Topeka, KS, USA)were assessed in a genome-wide association study, and revealed an association between genetic variants of alanine-glyoxylate aminotransferase 2 (AGXT2) and 2-oxoarginine. The most significant single nucleotide polymorphisms (SNP) associated with 2-oxoarginine was at position chrA1:212069607, [G/A] (p < 3.687 x 10-17). This SNP explained approx. 15% of the variance in 2-oxoarginine concentrations The distribution of genotype frequencies was 0.07 AA, 0.39 AG, and 0.54 GG, with a mean relative 2-oxoarginine concentration for each genotype of 0.45 AA, 0.92 AG, and 1.27 GG, indicating a subtractive effect of the minor allele (A). Serum concentrations of two AGXT2 substrates, sym./asym. dimethylarginines (SDMA/ADMA) and β-aminoisobutyrate (BAIB) were also strongly associated with SNP chrA1:212069607 (p < 1.43 x 10-12 and p < 2.30 x 10-14, resp.). These two AGXT2 substrates were increased with the minor allele (A), indicating that the variant of the AGXT2 gene results in decreased aminotransferase activity. Addnl., the lifetime history of stone incidence showed that cats with the AA variant of AGXT2 SNP had a 2.515x increased incidence of stones compared with cats having the GG variant (p = 0.019). In a subsequent study assessing AGXT2 genotypes, cats (n = 10 GG, 4 AG, 9 AA) were fed control or test food (containing betaine at 0.500%, and the botanicals green tea, fenugreek and tulsi at 0.25, 0.025, and 0.0015%, resp.) in a cross-over study design. Stone risk anal. was conducted on urine samples after feeding control or test food for 28 days each. A calcium oxalate titration test (COT) was performed to assess the amount of added Ox-2 (per L) required to initiate calcium oxalate crystal formation. Cats with the GG variant of the AGXT2 SNP required more added oxalate to initiate urine crystal formation after consuming test food compared with control food, indicating a decreased risk of oxalate crystal formation in GG cats. In addition, urine oxalate concentrations showed an overall effect of test food independent of genotype (p = 0.0009), which resulted in lower oxalate concentrations after consuming test food compared with control food. These data indicate that cats with the GG-specific variant of AGXT2 should benefit from a reduced risk of calcium oxalate stone formation after consuming a betaine and botanical dietary enhancement. Genes published new progress about Alleles. 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

Nowak, Andrew P.; Gross, Adam F.; Drummey, Kevin; Nelson, Ashley M.; Hocken, Alexis; Pritchard, Cailean Q.; Mott, Russell; Ventuleth, Michael; Graetz, Jason published the artcile< Visually and Infrared Transparent Poly(oxalamide) Films with Mechanical Toughness>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is visually IR transparent polyoxalamide film toughness.

The growing maturity and sophistication of autonomous vehicles incorporate increasing numbers of sensors to produce multiple data streams detailing vehicle surroundings. As part of the continuous and reliable transmission of data, protection of lenses and windows for sensors from environmental damage is necessary across bands including visible (400-750 nm), near IR (0.75 to 1.5μm), and thermal wavelengths (8-15μm). Here, we report a crosslinked poly(oxalamide) based on aliphatic amine monomers and dioxalate species, resulting in transparency in both visible (400-750 nm) and multiple IR bands (0.75-1.5μm, 3.5-5.5μm, and 8-12μm). Mech. toughness (ε = ~200%, σ = 35 MPa) and network resiliency toward fluids and thermal exposure are reflective of the crosslinked network and contribute to durability and the potential to protect brittle substrates. This was demonstrated by casting free-standing films bonded onto a germanium window using the identical poly(oxalamide) resin as an adhesive. Imaging through a thermal IR camera with the coated window before and after exposure to an abrasive sand stream showed the ability to protect the underlying substrate and maintain image quality while the unprotected window was severely degraded.

ACS Applied Polymer Materials published new progress about Abrasion resistance. 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

Xue, Yuan; Park, Han Seul; Jiang, Chao; Yu, Jin-Quan published the artcile< Palladium-Catalyzed β-C(sp3)-H Nitrooxylation of Ketones and Amides Using Practical Oxidants>, Quality Control of 112-63-0, the main research area is ketone amide nitrooxylation palladium catalyst carbon hydrogen bond activation.

Herein, a Pd(II)-catalyzed β-C(sp3)-H nitrooxylation of ketones and native amides was reported. The fine-tuned removable aminooxyamide auxiliary enabled β-C(sp3)-H functionalization of various aliphatic ketones. Practical iron(III) nitrate nonahydrate was used as the nitrate source and a single-electron oxidant for Pd(II)/Pd(III)/Pd(IV) catalysis. For amide substrates, N-iodosuccinimide (NIS) was applied as a bystanding two-electron oxidant in combination with silver nitrate for β-C(sp3)-H nitrooxylation. Palladacycle intermediates were isolated and characterized to elucidate the reaction mechanism for the C(sp3)-H activation of ketones with the L,X-type imino-amide directing group.

ACS Catalysis published new progress about Amides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

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