Tag: M.W=150-200

Song, Bichao published the artcilePd-Catalyzed Decarboxylative Olefination: Stereoselective Synthesis of Polysubstituted Butadienes and Macrocyclic P-glycoprotein Inhibitors, Related Products of isoquinoline, the main research area is vinylethylene carbonate diazo ester palladium decarboxylative olefination catalyst; vinyloxazolidinone diazo ester palladium decarboxylative olefination catalyst; vinylbenzoxazinone diazo ester palladium decarboxylative olefination catalyst; butadiene polysubstituted stereoselective preparation.

The efficient and stereoselective synthesis of polysubstituted butadienes, especially the multifunctional butadienes, represents a great challenge in organic synthesis. Herein, we wish to report a distinctive Pd(0) carbene-initiated decarboxylative olefination approach that enables the direct coupling of diazo esters with vinylethylene carbonates (VECs), vinyl oxazolidinones, or vinyl benzoxazinones to afford alc.-, amine-, or aniline-containing 1,3-dienes in moderate to high yields and with excellent stereoselectivity. This protocol features operational simplicity, mild reaction conditions, a broad substrate scope, and gram-scalability. Notably, a structurally unique allylic Pd(II) intermediate was isolated and characterized. DFT calculation and control experiments demonstrated that a rare Pd(0) carbene intermediate could be involved in this reaction. Moreover, the polysubstituted butadienes as novel building blocks were unprecedentedly assembled into macrocycles, which efficiently inhibited the P-glycoprotein and dramatically reversed multidrug resistance in cancer cells by 190-fold.

Journal of the American Chemical Society published new progress about Allyl amines Role: SPN (Synthetic Preparation), PREP (Preparation). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ishikawa, Youichi published the artcileMolecular orbital approach to odor molecules: normal fatty acids and cyclamenaldehydes, Formula: C11H12O3, the main research area is fatty acid odor mspr MO; cyclamenaldehyde odor mspr MO.

Eight normal fatty acids and 24 cyclamenaldehydes were analyzed based on the MO theory using Computer-Aided Chem. Programs (CAChe Programs) with PM3 parameters. We found reactive sites with high values of electrophilic frontier densities (EFDs) at appointed positions in both mol. series. A change in the values of EFDs in normal fatty acids would account for the selectivity in the response of a single olfactory receptor cell to the fatty acids. Changes in the values of EFDs at appointed positions of cyclamenaldehydes also correlated with their odor characteristics and intensities. This fact indicates that cyclamenaldehydes have common reactive sites that play a critical role in interactions with a receptor. Changes in their reactivities alter the odor characteristics and intensities of the mols. judged by perfumers, indicating that human discrimination of cyclamenaldehyde odor is determined at the stage of interaction between cyclamenaldehydes and an odor receptor.

International Journal of Quantum Chemistry published new progress about Electron density (FMO, electrophilic). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Formula: C11H12O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

He, Zhen published the artcileThe Interrupted Pummerer Reaction in a Sulfoxide-Catalyzed Oxidative Coupling of 2-Naphthols, Recommanded Product: 4-Methoxyphenylacetic acid, the main research area is interrupted Pummerer reaction sulfoxide catalyzed oxidative coupling naphthol; nigerone isonigerone synthesis; BINOLs; Pummerer reaction; metal-free catalysis; oxidative coupling; sulfoxide.

A benzothiophene S-oxide catalyst, generated in situ by sulfur oxidation with H2O2, mediates the oxidative coupling of 2-naphthols. Key to the catalytic process is the capture and inversion of reactivity of a 2-naphthol partner, using an interrupted Pummerer reaction of an unusual benzothiophene S-oxide, followed by subsequent coupling with a second partner. The new catalytic manifold has been showcased in the synthesis of the bioactive natural products, (±)-nigerone (I) and (±)-isonigerone (II). Although Pummerer reactions are used widely, their application in catalysis is rare, and our approach represents a new catalytic manifold for metal-free C-C bond formation.

Angewandte Chemie, International Edition published new progress about Aromatization (as driving force for catalyst regeneration). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Recommanded Product: 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Briand, Loiec published the artcileEvidence of an Odorant-Binding Protein in the Human Olfactory Mucus: Location, Structural Characterization, and Odorant-Binding Properties, Quality Control of 1205-17-0, the main research area is odorant binding protein OBP olfactory epithelium cleft mucus; hOBP isoform IIa alpha aldehyde fatty acid.

Odorant-binding proteins (OBPs) are small abundant extracellular proteins belonging to the lipocalin superfamily. They are thought to participate in perireceptor events of odor detection by carrying, deactivating, and/or selecting odorant mols. Putative human OBP genes (hOBP) have recently been described [Lacazette et al. (2000) Hum. Mol. Genet. 9, 289-301], but the presence of the corresponding proteins remained to be established in the human olfactory mucus. This paper reports the first evidence of such expression in the mucus covering the olfactory cleft, where the sensory olfactory epithelium is located. On the contrary, hOBPs were not observed in the nasal mucus covering the septum and the lower turbinate. To demonstrate the odorant binding activity of these proteins, a corresponding recombinant protein variant, hOBPIIaα, was secreted by the yeast Pichia pastoris and thoroughly characterized. It appears as a monomer with one disulfide bond located between C59 and C151, a conservative feature of all other vertebrate OBPs. By measuring the displacement of several fluorescent probes, we show that hOBPIIaα is able to bind numerous odorants of diverse chem. structures, with a higher affinity for aldehydes and large fatty acids. A computed 3D model of hOBPIIaα is proposed and reveals that two lysyl residues of the binding pocket may account for the increased affinity for aldehydes. The relatively limited specificity of hOBPIIaα suggests that other human OBPs are expected to take into account the large diversity of odorant mols.

Biochemistry published new progress about Disulfide group (C59-C151). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Quality Control of 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Oboh, Edmund published the artcileOptimization of the Urea Linker of Triazolopyridazine MMV665917 Results in a New Anticryptosporidial Lead with Improved Potency and Predicted hERG Safety Margin, Quality Control of 104-01-8, the main research area is triazolo pyridazine derivative structure linker preparation cryptosporidiosis.

Cryptosporidiosis is caused by infection of the small intestine by Cryptosporidium parasites, resulting in severe diarrhea, dehydration, malabsorption, and potentially death. The only FDA-approved therapeutic is only partially effective in young children and ineffective for immunocompromised patients. Triazolopyridazine MMV665917 is a previously reported anti-Cryptosporidium screening hit with in vivo efficacy but suffers from modest inhibition of the hERG ion channel, which could portend cardiotoxicity. Herein, we describe our initial development of structure-activity relationships of this novel lead series with a particular focus on optimization of the piperazine-urea linker. We have discovered that piperazine-acetamide is a superior linker resulting in identification of SLU-2633, which has an EC50 of 0.17μM, an improved projected margin vs. hERG, prolonged pharmacokinetic exposure in small intestine, and oral efficacy in vivo with minimal systemic exposure. SLU-2633 represents a significant advancement toward the identification of a new effective and safe treatment for cryptosporidiosis.

Journal of Medicinal Chemistry published new progress about Coccidiostats. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Quality Control of 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Senthamarai, Thirusangumurugan published the artcileUltra-small cobalt nanoparticles from molecularly-defined Co-salen complexes for catalytic synthesis of amines, Recommanded Product: 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is amine preparation; carbonyl compound ammonia cobalt salen nanocatalyst; aldehyde amine cobalt salen nanocatalyst.

The synthesis of in situ generated cobalt nanoparticles from molecularly defined complex cobalt(II)-N,N’-bis(salicylidene)-1,2-phenylenediamine as efficient and selective catalysts for reductive amination reactions. In the presence of ammonia and hydrogen, cobalt-salen complexes such as cobalt(II)-N,N’-bis(salicylidene)-1,2-phenylenediamine produce ultra-small (2-4 nm) cobalt-nanoparticles embedded in a carbon-nitrogen framework. The resulting materials constitute stable, reusable and magnetically separable catalysts, which enable the synthesis of linear and branched benzylic, heterocyclic and aliphatic primary amines RCH(R1)NH2 [R = Ph, pyridin-3-yl, 4-tert-butylcyclohexyl, etc.; R1 = H, Me, n-Bu, Bn; RR1 = -(CH2)7-] from carbonyl compounds RC(O)R1 and ammonia. The isolated nanoparticles also represent excellent catalysts for the synthesis of primary, secondary as well as tertiary amines including biol. relevant N-Me amines R2CH2N(R3)(R4) (R2 = Ph, pyridin-3-yl, n-heptyl, etc.; R3 = Ph, n-hexyl, cyclopentyl, etc.; R4 = H, Me).

Chemical Science published new progress about Carbonyl compounds (organic) Role: RCT (Reactant), RACT (Reactant or Reagent). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Recommanded Product: 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Giofre, Sabrina published the artcileEnantio- and Regioselective Palladium(II)-Catalyzed Dioxygenation of (Aza-)Alkenols, Name: 4-Methoxyphenylacetic acid, the main research area is morpholine enantioselective regioselective preparation; allyl azaalkenol oxycarbonylphenyl iodane palladium catalyst dioxygenation intamol cyclization; tetrahydro pyran enantioselective regioselective preparation; allylalkenol oxycarbonylphenyl iodane palladium catalyst dioxygenation intamol cyclization; Pd catalysis; alkene difunctionalizations; alkenols; dioxygenation; enantioselectivity; hypervalent iodine.

An oxidative Pd-catalyzed intra-intermol. dioxygenation of (aza-)alkenols were reported, with total regioselectivity. To study the stereoselectivity, different chiral ligands as well as different hypervalent-iodine compounds was compared. In particular, by using a C-6 modified pyridinyl-oxazoline (Pyox) ligand and hypervalent iodine bearing an aromatic ring, an excellent enantio- and diastereoselectivity was achieved.

Angewandte Chemie, International Edition published new progress about Aliphatic alcohols Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Name: 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Nichols, Andrew S. published the artcileSubunit Contributions to Insect Olfactory Receptor Function: Channel Block and Odorant Recognition, SDS of cas: 1205-17-0, the main research area is Drosophila olfactory receptor subunit channel block odorant recognition.

Insect olfactory receptors are heteromeric ligand-gated ion channels composed of � common subunit (Orco) and � subunit that confers odorant specificity. Little is known about how individual subunits contribute to the structure and function of the olfactory receptor complex. We expressed insect olfactory receptors in Xenopus oocytes to investigate 2 functional features, ion channel block and odorant recognition. The sensitivity of Drosophila olfactory receptors to inhibition by ruthenium red, a cation channel blocker, varied widely when different specificity subunits were present, suggesting that the specificity subunits contribute to the structure of the ion pore. Olfactory receptors formed by DmelOr35a and Orco subunits from several different species displayed highly similar odorant response profiles, suggesting that the Orco subunit does not contribute to the structure of the odorant-binding site. We further explored odorant recognition by conducting a detailed examination of the odorant specificity DmelOr67a + DmelOrco, a receptor that responds to aromatic structures. This screen identified agonists, partial agonists, and an antagonist of DmelOr67a + DmelOrco. Our findings favor specific subunit arrangements within the olfactory receptor complex and provide a preliminary odorophore for an olfactory receptor, offering a useful foundation for future exploration of insect olfactory receptor structure.

Chemical Senses published new progress about Drosophila. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, SDS of cas: 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Roberts, David W. published the artcileSkin Sensitization QMM for HRIPT NOEL Data: Aldehyde Schiff-Base Domain, Synthetic Route of 1205-17-0, the main research area is skin sensitization QMM Schiff Base.

The general chem. principles underlying skin sensitization for Schiff base (SB) electrophiles may be used to develop a quant. mechanistic model (QMM), based on reactivity supplemented with a hydrophobicity parameter for some but not all structures within the SB reaction domain. For aliphatic Schiff base electrophiles, the log of the no observed effect level (NOEL) values (pNOEL) from the human repeated insult patch test (HRIPT) can be calculated by the reactivity parameter summation of sigma star values (Σσ*) and a hydrophobicity parameter (logP). Specifically, the QMM, pNOEL = 2.34(± 0.33) Σσ* + 0.19(± 0.07) logP – 2.62(± 0.22), R2 = 0.77, R2(adj) = 0.74, s = 0.20, F = 27, was developed. Not all parts of the Schiff base domain are modeled with one equation. Particularly, predicting aromatic aldehydes and ketones appears to require a sep. equation. Interestingly, the same phys. organic chem. properties originally applied to modeling the local lymph node assay potency of Schiff base electrophiles apply to human potency as represented by the HRIPT. Reg.

Chemical Research in Toxicology published new progress about Contact dermatitis. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Synthetic Route of 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Hsu, Wei-Hsiang published the artcileASIC3-dependent metabolomics profiling of serum and urine in a mouse model of fibromyalgia, Computed Properties of 104-01-8, the main research area is fibromyalgia ASIC3 metabolomics profiling biomarker.

Fibromyalgia (FM) is characterized by chronic widespread pain. Here, we probed the metabolomics profiles of serum and urine in a mouse model of FM induced by intermittent cold stress (ICS). We focused on the role of acid-sensing ion channel 3 (ASIC3) in the metabolomics profiling because ICS treatment induced chronic widespread muscle pain lasting for 1 mo in wild-type (Asic3+/+) but not Asic3-knockout (Asic3-/-) mice. Serum and urine samples were collected from both genotypes at different ICS stages, including before ICS (basal level) and post-ICS at days 10 (middle phase, P10) and 40 (recovery phase, P40). Finally, we developed an algorithm for the impactful metabolites in the FM model including cis-aconitate, kynurenate, taurine, pyroglutamic acid, pyrrolidonecarboxylic acid, and 4-methoxyphenylacetic acid in urine as well as carnitine, deoxycholic acid, lysoPC(16:0), lysoPC(20:3), oleoyl-L-carnitine, and trimethylamine N-oxide in serum. Asic3-/- mice were impaired in only muscle allodynia development but not other pain symptoms in the ICS model, so the ASIC3-dependent metabolomics changes could be useful for developing diagnostic biomarkers specific to chronic widespread muscle pain, the core symptom of FM. Further pharmacol. validations are needed to validate these metabolomics changes as potential biomarkers for FM diagnosis and/or treatment responses.

Scientific Reports published new progress about Biomarkers. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Computed Properties of 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem