Author: Jessica.F

Ochiai, Koji; Takita, Satoshi; Eiraku, Tomohiko; Kojima, Akihiko; Iwase, Kazuhiko; Kishi, Tetsuya; Fukuchi, Kazunori; Yasue, Tokutaro; Adams, David R.; Allcock, Robert W.; Jiang, Zhong; Kohno, Yasushi published the artcile< Phosphodiesterase inhibitors. Part 3: Design, synthesis and structure-activity relationships of dual PDE3/4-inhibitory fused bicyclic heteroaromatic-dihydropyridazinones with anti-inflammatory and bronchodilatory activity>, Recommanded Product: 2-Amino-3-methoxyphenol, the main research area is pyridazinone dihydro heteroaromatic preparation antiinflammatory bronchodilatory activity.

(-)-6-(7-Methoxy-2-trifluoromethylpyrazolo[1,5-a]pyridin-4-yl)-5-methyl-4,5-dihydro-3-(2H)-pyridazinone (KCA-1490) is a dual PDE3/4 inhibitor that exhibits potent combined bronchodilatory and anti-inflammatory activity. A survey of potential bicyclic heteroaromatic replacement subunits for the pyrazolo[1,5-a]pyridine core of KCA-1490 has identified the 4-methoxy-2-(trifluoromethyl)benzo[d]thiazol-7-yl and 8-methoxy-2-(trifluoromethyl)quinolin-5-yl analogs as dual PDE3/4-inhibitory compounds that potently suppress histamine-induced bronchoconstriction and exhibit anti-inflammatory activity in vivo.

Bioorganic & Medicinal Chemistry published new progress about Anti-inflammatory agents. 40925-69-7 belongs to class ethers-buliding-blocks, and the molecular formula is C7H9NO2, Recommanded Product: 2-Amino-3-methoxyphenol.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Comins, Daniel L.; Brown, Jack D. published the artcile< Ortho substitution of m-anisaldehyde via α-amino alkoxide directed lithiation>, Safety of 3-Methoxy-2-methylbenzaldehyde, the main research area is ortho substitution anisaldehyde; amino alkoxide directed lithiation; regioselective lithiation anisaldehyde; methylation anisaldehyde regioselective; methylanisaldehyde.

The directed lithiation of α-amino alkoxides derived from 3-MeOC6H4CHO (I) was studied. The α-amino alkoxides were formed in situ by the addition of I to N-MeLiNCH2CH2NMe2, MeLiNNMe2 or lithium N-methylpiperazide. Several lithiation-methylation reactions of the in situ formed α-amino alkoxides were performed and the products analyzed for 2,3-, 6,3- and 4,3-Me(MeO)C6H3CHO and I. Mixtures of products were obtained in several cases. A highly regioselective directed lithiation occurred at C(2) in C6H6 or PhMe in the presence of MeLiNNMe2 and PhLi. In this manner, 2,3-Me(MeO)C6H3CHO of 96% purity was prepared in 1 step from I in 91% yield.

Journal of Organic Chemistry published new progress about Lithiation, regioselective. 56724-03-9 belongs to class ethers-buliding-blocks, and the molecular formula is C9H10O2, Safety of 3-Methoxy-2-methylbenzaldehyde.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Cho, Hyunkyung; Jeon, Hongjun; Shin, Jae Eui; Lee, Seokwoo; Park, Soojun; Kim, Sanghee published the artcile< Asymmetric synthesis of Cα-substituted prolines through Curtin-Hammett-controlled diastereoselective N-alkylation>, Safety of 3-Methoxy-2-methylbenzaldehyde, the main research area is substituted proline enantioselective diastereoselective synthesis chirality transfer Stevens rearrangement; amino acid proline ester alkylation substituted benzyl; alkylation mechanism Curtin Hammett principle DFT transition state; crystal structure substituted proline quaternization free energy steric effect; Curtin-Hammett principle; chirality transfer; proline derivatives; rearrangement; stereoselectivity.

Asym. synthesis of α-substituted proline derivatives has been accomplished by an efficient chirality-transfer method. High diastereoselectivity of the N-alkylation of the proline ester (C→N chirality transfer) was achieved when a 2,3-disubstituted benzyl group was used as the N-substituent. DFT calculations provided a mechanistic rationale for the high degree of stereoselectivity. The generated N-chirality of the quaternary ammonium salt was transferred back to the α-carbon through a stereoselective [2,3]-Stevens rearrangement (N→C chirality transfer) to give α-substituted proline ester.

Chemistry – A European Journal published new progress about Alkylation, stereoselective. 56724-03-9 belongs to class ethers-buliding-blocks, and the molecular formula is C9H10O2, Safety of 3-Methoxy-2-methylbenzaldehyde.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kende, Andrew S.; Koch, Kevin published the artcile< Intramolecular radical cyclization of phenolic nitronates. Facile synthesis of annelated tropone and tropolone derivatives>, Electric Literature of 52244-70-9, the main research area is nitrophenolate electron transfer cyclization; spirocyclic nitro dienone preparation rearrangement; bicyclic tropone.

Treating p-HOC6H4(CH2)nNO2 (n = 4, 5) or 4,3-HO(MeO)C6H3(CH2)4NO2 with aqueous KOH followed by K3Fe(CN)6 gives spirocyclic nitrodienones I (X = CH2, CH2CH2; R = H, OMe), which rearrange to bicyclic tropones II (same X, R).

Tetrahedron Letters published new progress about Cycloaddition reaction, intramolecular. 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, Electric Literature of 52244-70-9.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Noda, Hidetoshi; Asada, Yasuko; Shibasaki, Masakatsu published the artcile< O-Benzoylhydroxylamines as Alkyl Nitrene Precursors: Synthesis of Saturated N-Heterocycles from Primary Amines>, HPLC of Formula: 52244-70-9, the main research area is benzoylhydroxylamine alkyl nitrene precursor primary amine rhodium catalyst; synthesis saturated nitrogen heterocycle.

We introduce O-benzoylhydroxylamines as competent alkyl nitrene precursors. The combination of readily available, stable substrates and a proficient rhodium catalyst provides a straightforward means for the construction of various pyrrolidine rings from the corresponding primary amines. Preliminary mechanistic investigation suggests that the structure of the nitrene precursor plays a role in determining the nature of the resulting reactive intermediate.

Organic Letters published new progress about C-H bond activation. 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, HPLC of Formula: 52244-70-9.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Canceill, Josette; Collet, Andre published the artcile< Synthesis and optical activity of p-(-)-2,7,12-tribromo-3,8,13-trihydroxycyclotribenzylene and related compounds. Evidence for the non-orthogonality of the B2u and B1u transitions in polysubstituted benzenes and its relevance to the exciton chirality method>, COA of Formula: C8H9BrO2, the main research area is cyclotribenzylene tribromotrihydroxy preparation configuration; trimerization cyclo benzenemethanol; benzenemethanol cyclotrimerization.

Cyclotrimerization of 4,3-Br(MeO)C6H3CH2OH gave 2,7,12-tribromo-3,8,13-trimethoxycyclotribenzylene (I, R = Me) and demethylation of the latter gave triphenol (±)-I (R = H) which was resolved into enantiomers. Methylation and acetylation of (+)- or (-)-I (R = H) furnished (+)- or (-)-I (R = Me, Ac). (-)-I were assigned P-(-) absolute configuration by chem. correlation with M-(+)-cyclotrianisylene. The optical activity of I was analyzed in the light of the exciton theory. In all compounds the exptl. exciton CD pattern in the 230 nm region, the B1u transition, was opposite to that expected from the spectroscopic moments of the substituents. This unexpected behavior suggested that the angle between the polarization directions of the B2u (290 nm) and B1u (230 nm) transitions in I should significantly depart from the value, 90°, usually assumed in polysubstituted benzenes, and emphasized the risk of using the B1u transition for configurational assignments based on chiroptical methods.

Nouveau Journal de Chimie published new progress about Absolute configuration. 17100-64-0 belongs to class ethers-buliding-blocks, and the molecular formula is C8H9BrO2, COA of Formula: C8H9BrO2.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Fang, Wan-Yin; Qin, Hua-Li published the artcile< Cascade Process for Direct Transformation of Aldehydes (RCHO) to Nitriles (RCN) Using Inorganic Reagents NH2OH/Na2CO3/SO2F2 in DMSO>, Safety of 1-Bromo-2-methoxyethane, the main research area is nitrile chemoselective one step preparation; condensation aldehyde hydroxylamine sulfuryl fluoride; cascade oximation elimination reaction aldehyde hydroxylamine sulfuryl fluoride.

Aryl, α,β-unsaturated, and alkyl nitriles were prepared in one step from the corresponding aldehydes by treatment with hydroxylamine hydrochloride, Na2CO3, SO2F2, and DMSO at ambient temperature

Journal of Organic Chemistry published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 6482-24-2 belongs to class ethers-buliding-blocks, and the molecular formula is C3H7BrO, Safety of 1-Bromo-2-methoxyethane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Cao, Wen-rui; Ge, Jing-qiu; Xie, Xin; Fan, Meng-lin; Fan, Xu-dong; Wang, Hong; Dong, Zhao-yue; Liao, Zhi-hua; Lan, Xiao-zhong; Chen, Min published the artcile< Protective effects of petroleum ether extracts of Herpetospermum caudigerum against α-naphthylisothiocyanate-induced acute cholestasis of rats>, HPLC of Formula: 52244-70-9, the main research area is Herpetospermum petroleum ether extract acute cholestasis alpha naphthylisothiocyanate; Acute cholestasis; Antioxidant; Herpetospermum caudigerum; Long-chain fatty acids; α-naphthylisothiocyanate.

The ripe seeds of Herpetospermum caudigerum have been used in Tibetan folk medicine for treatment of bile or liver diseases including jaundice, hepatitis, intumescences or inflammation. Previously reports suggested that the seed oil and some lignans from H. caudigerum exhibited protective effects against carbon tetrachloride (CCl4)-induced hepatic damage in rats, which may be related to their free radical scavenging effect. However, the protective effect of H. caudigerum against cholestasis is still not revealed. The aim of the present study was to investigate the pharmacol. effect and the chem. constituents of the petroleum ether extract (PEE) derived from H. caudigerum against α-naphthylisothiocyanate (ANIT)-induced acute cholestasis in rats. Male cholestatic Sprague-Dawley (SD) rats induced by ANIT (60 mg/kg) were orally administered with PEE (350, 700 and 1400 mg/kg). Levels of serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), alk. phosphatase (ALP), γ-Glutamyl transpeptidase (γ-GTP), total bilirubin (TBIL), direct bilirubin (DBIL) and total bile acid (TBA), as well as bile flow, and histopathol. assay were evaluated. Hepatic malondialdehyde (MDA), myeloperoxidase (MPO), superoxide dismutase (SOD), glutathione S-transferase (GST), and nitric monoxide (NO) in liver were measured to explore the possible protective mechanisms. Phytochem. anal. of PEE was performed by gas chromatog.-mass spectrometer (GC-MS). PEE have exhibited significant and dose-dependent protective effect on ANIT-induced liver injury by reduce the increases in serum levels of ALT, AST, ALP, γ-GTP, TBIL, DBIL and TBA, restore the bile flow in cholestatic rats, and reduce the severity of the pathol. tissue damage induced by ANIT. Hepatic MDA, MPO and NO contents in liver tissue were reduced, while SOD and GST activities were elevated in liver tissue. 49 compounds were detected and 39 of them were identified by GC-MS anal., in which long-chain fatty acids were the main constituents. PEE exhibited a dose-dependently protective effect on ANIT-induced liver injury in cholestatic rats with the potential mechanism of attenuated oxidative stress in the liver tissue, and the possible active compounds were long-chain fatty acids.

Journal of Ethnopharmacology published new progress about Bile acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, HPLC of Formula: 52244-70-9.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kubo, Yuji; Nozawa, Toshiki; Maeda, Kentaro; Hashimoto, Yuta published the artcile< Asymmetrical benzo[a]-fused N2O2-boron-chelated BODIPYs as red to near-infrared absorbing chromophores: synthesis, characteristics and device applications for opto-electronics>, Quality Control of 190788-60-4, the main research area is dioxohydrazine boron chelation chromophore synthesis device application.

Asym. benzo[a]-fused BODIPYs with benzo(thieno)[1,3,2]oxazaborinine units 1-4 were synthesized for the first time. The structural feature was elucidated by X-ray crystallog. and NICS(0) calculation, indicating that the isoindole ring may possess azafulvene character. The photophys. properties of the dyes were investigated, demonstrating that they absorb far-red and NIR light with a λmax value of 663-709 nm in THF. Replacement of benzo[1,3,2]oxazaborinine with the thieno-counterpart caused a red-shift in the absorption band. Interestingly, the effect of thiophene insertion on the photophys. properties is dependent on the position of the thiophene in the chromophore, as determined from cyclic voltammetry (CV) measurement and theor. calculations Further, N2O2-ligated sp3-boron induces chirality into the chromophore, facilitating optical resolution of 2 by chiral high-pressure liquid chromatog.; helical dyes P-2 and M-2 were successfully characterized. As a potential device application, a single component device (ITO/dye 2/Al) was fabricated to produce a photocurrent of 8.42 × 10-7 A cm-2 at a bias potential of 1 V under photoirradiation at 750 nm (128μW cm-2). Compared to the dark current, the on/off current ratio at the same bias potential was determined to be 1.42 × 102. The result suggests that a sophisticated combination of asym. BODIPY with a n-type acceptor would allow for NIR photodiodes with a p-n interface.

Materials Advances published new progress about Boron dipyrromethene complexes Role: PRP (Properties), SPN (Synthetic Preparation), TEM (Technical or Engineered Material Use), PREP (Preparation), USES (Uses). 190788-60-4 belongs to class ethers-buliding-blocks, and the molecular formula is C13H19BO3, Quality Control of 190788-60-4.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Diez-Castellnou, Marta; Suo, Rongtian; Marro, Nicolas; Matthew, Saphia A. L.; Kay, Euan R. published the artcile< Rapidly Adaptive All-covalent Nanoparticle Surface Engineering>, Application of C3H7BrO, the main research area is gold nanoparticle surface engineering equilibration; acetals; adaptive colloidal nanoparticles; dynamic covalent chemistry; gold nanoparticles; hydrazones.

Emerging nanotechnologies demand the manipulation of nanoscale components with the same predictability and programmability as is taken for granted in mol. synthetic methodologies. Yet installing appropriately reactive chem. functionality on nanomaterial surfaces has previously entailed compromises in terms of reactivity scope, functionalization d., or both. Here, we introduce an idealized dynamic covalent nanoparticle building block for divergent and adaptive post-synthesis modification of colloidal nanomaterials. Acetal-protected monolayer-stabilized gold nanoparticles are prepared via operationally simple protocols and are stable to long-term storage. Tunable surface densities of reactive aldehyde functionalities are revealed on-demand, leading to a wide range of adaptive surface engineering options from one nanoscale synthon. Anal. tractable with mol. precision, interfacial reaction kinetics and dynamic surface constitutions can be probed in situ at the ensemble level. High functionalization densities combined with rapid equilibration kinetics enable environmentally adaptive surface constitutions and rapid nanoparticle property switching in response to simple chem. effectors.

Chemistry – A European Journal published new progress about Concentration (process). 6482-24-2 belongs to class ethers-buliding-blocks, and the molecular formula is C3H7BrO, Application of C3H7BrO.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem