Tag: M.W=150-200

Alfinito, Eleonora published the artcileSmell Nanobiosensors: Hybrid systems based on the electrical response to odorant capture.Theory And Experiment, Application In Synthesis of 1205-17-0, the main research area is olfactory receptor 17 GPCR rhodopsin nanobiosensor odorant elec impedance.

Mammalian olfactory system is the bio-archetype of smell sensor devices. It is based on a very articulated mechanism which translate the odorant capture information performed by the olfactory receptors (ORs) into a code. Finally, the code is sent to the brain for aroma recognition. Our aim is to partially mimic this system to produce a biosensor on nanometric scale. The active part of the device is constituted of nanosomes containing specific ORs. Each nanosome is interfaced with nanoelectrodes and the odorant capture is converted into an elec. signal. Specifically, the elec. response is correlated with the conformational change that a single OR undergoes when it captures a specific odorant mol. An array of nanodevices should be able to produce specific response profiles. In this paper we present a possible theor. framework in which the exptl. results should be embedded. It consists of the description of the protein in terms of an impedance network able to simulate the elec. characteristics associated with the protein topol. (c) 2009 American Institute of Physics.

AIP Conference Proceedings published new progress about Biosensors. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Application In Synthesis of 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Alfinito, Eleonora published the artcileHuman olfactory receptor 17-40 as an active part of a nanobiosensor: a microscopic investigation of its electrical properties, Safety of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is human olfactory receptor nanobiosensor elec resistance impedance spectrum.

Increasing attention has recently been devoted to protein-based nanobiosensors. The main reason is the huge number of possible technol. applications, ranging from drug detection to early cancer diagnosis. Their operating model is based on protein activation and the corresponding conformational change due to the capture of an external mol., the so-called ligand. Recent measurements, performed with different techniques on the human 17-40 olfactory receptor, revealed a very narrow window of response in respect to the odor concentration This is a crucial point for understanding whether the use of this olfactory receptor as a sensitive part of a nanobiosensor is a good choice. In this paper we investigate the topol. and elec. properties of the human olfactory receptor 17-40 with the objective of providing a microscopic interpretation of available experiments To this purpose, we model the protein by means of a graph that is able to capture the mean features of the 3D backbone structure. The graph is then associated with an equivalent impedance network, able to evaluate the impedance spectra of the olfactory receptor in its native and activated state. We assume a topol. origin of the different protein elec. responses to different ligand concentrations: In this perspective all the exptl. data are collected and interpreted satisfactorily within a unified scheme, also useful for application to other proteins.

RSC Advances published new progress about Biosensors. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Safety of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Vidic, Jasmina published the artcileOn a chip demonstration of a functional role for odorant binding protein in the preservation of olfactory receptor activity at high odorant concentration, Product Details of C11H12O3, the main research area is odorant binding protein olfactory receptor mucus surface plasmon resonance.

The mol. mechanisms underlying odorant detection were investigated using the chip based SPR technique by focusing on the dynamic interactions between transmembrane Olfactory Receptor OR1740, odorant ligands and soluble Odorant-Binding Protein (OBP-1F). The OR1740 present in the lipid bilayer of nanosomes derived from transformed yeasts specifically bound OBP-1F. The receptor preferential odorant ligand helional released bound OBP-1F from the OR-OBP complex, while unrelated odorants failed to do so. OBP-1F modified the functional OR1740 dose-response to helional, from a bell-shaped to a saturation curve, thus preserving OR activity at high ligand concentration This unravels an active role for OBPs in olfaction, in addition to passive transport or a scavenger role. This sensorchip technol. was applied to assessing native OBP-1F in a biol. sample: rat olfactory mucus also displayed significant binding to OR1740 nanosomes, and the addition of helional yielded the dissociation of mucus OBP from the receptor.

Lab on a Chip published new progress about Biosensors. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Product Details of C11H12O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhao, Cong published the artcileCharacterization of key aroma compounds in pixian broad bean paste through the molecular sensory science technique, HPLC of Formula: 21834-92-4, the main research area is pixian broad bean paste key aroma compound mol sensory.

The Pixian broad bean paste (PBBP) is widely welcomed by consumers in China due to its unique aroma. The objective of this study was to characterize the key aroma of PBBP. The aromas of PBBP were fractionated by normal phase-liquid chromatog. (NP-LC) and detected and identified by gas chromatog.-olfactory (GC-O) coupled with gas chromatog.-mass spectrometry (GC-MS), and quantitated by stir bar sorptive extraction (SBSE). The results showed that 58 aroma-active compounds were identified in PBBP, of which acids and phenolics had the highest concentration, and 39 odorants were demonstrated as important odorants. Besides, aroma recombination tests and statistical anal. showed that the original PBBP and recombinant have no significant difference in sweat/sour, roasted, and floral attributes, proving that this study successfully simulated the typical aroma of PBBP. The omission tests demonstrated 4-ethylguaiacol and 4-vinylguaiacol as the key odorants and revealed the significance of sotolon, 4-hydroxy-2,5-dimethyl-3(2H)-furanone (HDMF), the entire class of phenolics, and the entire class of acids, particularly acetic acid, 3-methylbutanoic acid, 4-methylpentanoic acid may have a synergistic effect, for the overall aroma of the PBBP.

LWT–Food Science and Technology published new progress about Broad bean. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, HPLC of Formula: 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Svec, Riley L. published the artcileImidazotetrazines as Weighable Diazomethane Surrogates for Esterifications and Cyclopropanations, Safety of 4-Methoxyphenylacetic acid, the main research area is repurpose imidazotetrazine weighable diazomethane synthon esterification cyclopropanation; alkylation; cyclopropanation; diazo compounds; diazomethane; imidazotetrazines.

Diazomethane is one of the most versatile reagents in organic synthesis, but its utility is limited by its hazardous nature. Although alternative methods exist to perform the unique chem. of diazomethane, these suffer from diminished reactivity and/or correspondingly harsher conditions. Herein, we describe the repurposing of imidazotetrazines (such as temozolomide, TMZ, the standard of care for glioblastoma) for use as synthetic precursors of alkyl diazonium reagents. TMZ was employed to conduct esterifications and metal-catalyzed cyclopropanations, and results show that Me ester formation from a wide variety of substrates is especially efficient and operationally simple. TMZ is a com. available solid that is non-explosive and non-toxic, and should find broad utility as a replacement for diazomethane.

Angewandte Chemie, International Edition published new progress about Alkylation. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Safety of 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ma, Pengju published the artcilePhotocatalyst- and additive-free decarboxylative alkylation of N-aryl tetrahydroisoquinolines induced by visible light, Formula: C9H10O3, the main research area is alkyl aryl tetrahydroisoquinoline preparation; tetrachlorohydroxyphthalimide alkyl ester aryl tetrahydroisoquinoline decarboxylative alkylation.

Synthesis of C-1 alkylated tetrahydroisoquinoline products I (R = Pr, 4-oxocyclohexyl, oxan-4-yl, etc.; R1 = Ph, pyridin-4-yl, naphthalen-1-yl, etc.; R2 = H. MeO) and II via a visible light induced decarboxylative alkylation of N-aryl tetrahydroisoquinolines III (X = H) and 9-methyl-2-phenyl-1H,2H,3H,4H,9H-pyrido[3,4-b]indole has been developed using tetrachloro-N-hydroxyphthalimide esters IV as alkylation agents. This redox-neutral reaction can proceed without the assistance of photocatalysts, transition metals and external additives by irradiation with blue LEDs. Preliminary mechanistic studies indicated that this transformation probably proceeded through an electron donor-acceptor complex involved radical process.

Organic Chemistry Frontiers published new progress about Alkylation. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Formula: C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Cannalire, Rolando published the artcileBroad spectrum anti-flavivirus pyridobenzothiazolones leading to less infective virions, Application of 4-Methoxyphenylacetic acid, the main research area is dengue yellow fever virus antiflavivirus pyridobenzothiazolone; Antiviral small molecules; Antivirals; Dengue inhibitors; Flavivirus inhibitors; Flavivirus replication; Zika virus.

We report the design, synthesis, and biol. evaluation of a class of 1H-pyrido[2,1-b][1,3]benzothiazol-1-ones originated from compound 1, previously identified as anti-flavivirus agent. Some of the new compounds showed activity in low μM range with reasonable selectivity against Dengue 2, Yellow fever (Bolivia strain), and West Nile viruses. One of the most interesting mols., compound 16, showed broad antiviral activity against addnl. flaviviruses such as Dengue 1, 3 and 4, Zika, Japanese encephalitis, several strains of Yellow fever, and tick-borne encephalitis viruses. Compound 16 did not exert any effect on alphaviruses and phleboviruses and its activity was maintained in YFV infected cells from different species. The activity of 16 appears specific for flavivirus with respect to other virus families, suggesting, but not proving, that it might be targeting a viral factor. We demonstrated that the antiviral effect of 16 is not related to reduced viral RNA synthesis or virion release. On the contrary, viral particles grown in the presence of 16 showed reduced infectivity, being unable to perform a second round of infection. The chem. class herein presented thus emerges as suitable to provide pan-flavivirus inhibitors.

Antiviral Research published new progress about Alphavirus. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Application of 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Alsaif, Nawaf A. published the artcileSynthesis of novel diclofenac hydrazones: molecular docking, anti-inflammatory, analgesic and ulcerogenic activity, Formula: C9H10O3, the main research area is dichloroanilinophenyl methylidene acetohydrazide preparation antiinflammatory analgesic ulcerogenic SAR docking.

This study was aimed to design novel diclofenac hydrazones I [R = 2,4-dimethoxyphenyl, 3,5-dimethoxy-4-hydroxyphenyl, 2,5-dihydroxyphenyl, Etc] having anti-inflammatory and analgesic activity with gastric sparing effect. A new series of 2-[2-(2,6-dichloroanilino)phenyl]-N’-[(substituted phenyl)methylidene] acetohydrazide derivatives I were synthesized and evaluated for their anti-inflammatory, analgesic, and ulcerogenic activity. The compounds I were identified and confirmed by elemental anal. and spectral data. During anti-inflammatory activity by carrageenan-induced paw edema method, compounds I [R = 2,3-dimethoxyphenyl, 2,4-dimethoxyphenyl, 3-ethoxy-2-hydroxyphenyl, 3,5-dimethoxy-4-hydroxyphenyl, 3-methoxy-4-ethoxyphenyl, 2,5-dihydroxyphenyl] were found to be most promising. Compounds I [R = 2,4-dimethoxyphenyl, 3,5-dimethoxy-4-hydroxyphenyl, 2,5-dihydroxyphenyl] have been found to have significant analgesic activity compared to the reference drug diclofenac in analgesic activity by both the hot plate method and acetic acid-induced writhing method. The compounds I which presented highly significant anti-inflammatory and analgesic activity were further tested for their ulcerogenic activity. Compounds I [R = 2,4-dimethoxyphenyl, 3,5-dimethoxy-4-hydroxyphenyl] showed maximum ulcerogenic reduction activities. Compound I [R = 3,5-dimethoxy-4-hydroxyphenyl] was found to have LD50 of 168 mg/kg. Compound I [R = 3,5-dimethoxy-4-hydroxyphenyl] with 3,5-dimethoxy-4-hydroxyphenyl substitution was found to be the most promising anti-inflammatory and analgesic agent with gastric sparing activity. Mol. docking of compounds I was performed for COX-1/COX-2 binding site. Lead compound I [R = 3,5-dimethoxy-4-hydroxyphenyl] showed better binding affinities of -9.4 kJ/mol with both COX-1 and COX-2 as compared to the standard drug, diclofenac with binding affinities of -6.6 kJ/mol and -8.1 kJ/mol for COX-1 and COX-2, resp.

Journal of Chemistry published new progress about Analgesics. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Formula: C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bhat, Mashooq A. published the artcileNovel sulindac derivatives: synthesis, characterisation, evaluation of antioxidant, analgesic, anti-inflammatory, ulcerogenic and COX-2 inhibition activity, Product Details of C9H10O3, the main research area is sulindac acetohydrazide synthesis NSAID analgesic antioxidant COX2 ulcer; COX-2 activity; Sulindac hydrazide; analgesic; anti-inflammatory; antioxidant; hydrazones.

A new series of N’-(substituted phenyl)-2-(1-(4-(methylsulfinyl) benzylidene)-5-fluoro-2-methyl-1H-inden-3-yl) acetohydrazide derivatives were prepared in good yields in an efficient manner. All the compounds were fully characterised by the elemental anal. and spectral data. Synthesized compounds were evaluated for antioxidant activity by DPPH method. Compounds (R = 3-methoxyphenyl), (R = 4-dimethylaminophenyl) and (R = 2,4,5-trimethoxy phenyl) substitutions were found to be having highly potent antioxidant activity. Compound , with para dimethylaminophenyl substitution was found to be having highest antioxidant activity. It was further evaluated in vivo for various analgesic, anti-inflammatory, ulcerogenic and COX-2 inhibitory activity in different animal models. Lead compound was found to be significant anti-inflammatory and analgesic agent. It was also evaluated for ulcerogenic activity and demonstrated significant ulcerogenic reduction activity in ethanol and indomethacin model. The LD50 of compound was found to be 131 mg/kg. The animals treated with compound prior to cisplatin treatment resulted in a significant reduction in COX-2 protein expression when compared to cisplatin-treated group. Sulindac derivative with para dimethylaminophenyl substitution was found to be the most potent antioxidant, anti-inflammatory and analgesic agent as well as with significant gastric sparing activity as compared to standard drug sulindac. Compound significantly downregulated liver tissue COX-2 gene expression.

Journal of Enzyme Inhibition and Medicinal Chemistry published new progress about Analgesics. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Product Details of C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wasilewski, Tomasz published the artcileDetermination of long-chain aldehydes using a novel quartz crystal microbalance sensor based on a biomimetic peptide, HPLC of Formula: 1205-17-0, the main research area is aliphatic aldehyde quartz crystal microbalance biosensor biomimetic peptide.

This study presents investigation on usefulness of the peptide mimicking HarmOBP7 region as a receptor element of the piezoelec. sensor for selective anal. of long-chain aldehydes. Identification of odorant binding proteins creates new possibilities for design of peptides mimicking binding properties of their volatile compounds Exploration of OBPs and new peptide sequences capable to effectively bind volatile compounds is necessary to enhance artificial olfaction. For the development of biosensors where simple detection is crucial rather than identification of subsequent metabolic activity, the use of sub-protein components (e.g. ligand-binding regions or synthetic peptides) is still escalating. Bearing all this in mind, a segment of a peptide sequence associated with a specific function of HarmOBP7 (involved in binding the long-chain aldehydes) has been designed, synthesized and immobilized on a piezoelec. transducer. The results of in silico investigations were correlated with the exptl. measurements of gas substances. The correlated results confirm a high selectivity of the KLLFDSLTDLKKKMSEC-based sensor with respect to long-chain aliphatic aldehydes including octanal, decanal, undecanal, nonanal and helional. Odorant mols. interact with recognition peptide with specific affinities. The results can throw a new light on the possibility of synthetic peptide application as a receptor layer in biosensors in odorants anal.

Microchemical Journal published new progress about Biomarkers. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, HPLC of Formula: 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem