Month: November 2022

Pan, Bo-Wen; Shi, Yang; Li, Wen-Chao; Wang, Qing; Pan, Meng; Wu, Qiong; Fu, Hong-Zheng published the artcile< Synthesis and biological evaluation of Vinpocetine derivatives>, Application In Synthesis of 19241-24-8, the main research area is vinpocetine derivative preparation PDE1A inhibitor vasorelaxant; PDE1A; Structural modification; Vinpocetine.

A new series of Vinpocetine derivatives were synthesized and evaluated for their inhibitory activity on PDE1A in vitro. Seven compounds with higher inhibitory activity were selected for surface plasmon resonance (SPR) binding experiments Compared with Vinpocetine, these high potency compounds presented a higher binding affinity with PDE1A, which was consistent with inhibitory activity. After further screening, four compounds and Vinpocetine were selected to examine the vasorelaxant effects on endothelium-intact rat thoracic aortic rings. The study suggested that the effects of compounds I (R1 = 4-fluorophenyl) and I (R1 = 3-fluorophenyl) were the most significant with the maximum value of 93.46 ± 0.77% and 92.90 ± 0.78% (n = 5) at a concentration of 100μM resp. Based on these studies, compounds I (R1 = 4-fluorophenyl) and I (R1 = 3-fluorophenyl) were considered for further development as hit compounds

Bioorganic & Medicinal Chemistry Letters published new progress about Cerebrovascular disease. 19241-24-8 belongs to class esters-buliding-blocks, and the molecular formula is C11H13NS, Application In Synthesis of 19241-24-8.

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

O’Ferrall, R. A. More; Kwok, W. K.; Miller, Sidney I. published the artcile< Medium effects, isotope rate factors, and the mechanism of the reaction of diphenyldiazomethane with carboxylic acids in the solvents ethanol and toluene>, SDS of cas: 112-63-0, the main research area is .

The mechanism of the reaction of mol. acids (HA) with Ph2CN2 (I) in ethanol involves a slow proton transfer to give the ion pair Ph2CHN2+A-. This is followed by expulsion of N to give a second ion pair Ph2CH+A-, which may then either collapse to form ester or dissociate to form benzhydryl Et ether. This mechanism is consistent with the second-order kinetics, isotope effect kH/kD = 3.5 (BzOH in EtOH and BzOD in EtOH), and with an amount of ester in the product (α = 0.60-0.70) which is essentially independent of the mol. acid or of D substitution in it. Two factors, the polarity of the medium and the presence of more reactive acid dimers, account for medium effects on the slow step of the reaction of I with monomeric carboxylic acids. Thus, the second-order rate constant increases by a factor of 1.5 as the concentration of BzOH increases (0.0-0.7M); addition of toluene causes the rate constant to drop from 0.69 (ethanol) to 0.42 (85 volume-% toluene) and then rise to 0.73 1. mole-1 min.-1(toluene) at 27°. In toluene, the apparent second-order rate constant increases with BzOH and decreases with BzOD concentrations resulting in the peculiar divergence kH/kD = 1.8-3.7 (acid 0.015-0.25M). In toluene it is the dimer which is the reacting acid species and the relatively large concentration dependence is ascribed to a medium effect, rather than to changes in acid association Concerning the product partitioning steps, it is believed that they are rapid and unselective or essentially diffusion controlled. However, specific “”chem. factors,”” i.e., the polarity of the medium, the nucleophilicity of the solvent, and the strength of added acids, compete with or alter the diffusion rates, so that the ester to ether ratio in the products does change. The similarity to product partitioning steps of solvolysis reactions is emphasized.

Journal of the American Chemical Society published new progress about Carboxyl group. 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

Clugston, D. M.; MacLean, D. B. published the artcile< Mass spectra of oxygenated quinolines>, SDS of cas: 112-63-0, the main research area is .

The mass spectra of the monohydroxyquinolines, the monomethoxyquinolines, N-methyl-2-quinolone, and N-methyl-4-quinolone have been recorded. The isomeric hydroxy compounds vary somewhat in the stability of the mol. ion, but all show the same fragmentation mechanism. Two general fragmentation patterns are discernible in the spectrum of each of the monomethoxyquinolines, but there is considerable variation among the isomers in the extent to which the two patterns occur. In addition, 8-methoxyquinoline undergoes a peculiar fragmentation wherein all three Me hydrogens are lost. The 3-methoxy compound is unusual in that loss of 43 mass units from the mol. ion occurs in one step. Deuterium- and 13C-labeling experiments have proved to be useful in interpreting the fragmentation pathways. The spectra of the two N-methylquinolones prove that O to N Me rearrangement does not occur to any significant extent upon electron impact.

Canadian Journal of Chemistry published new progress about Mass spectra. 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

Lv, Daqi; Sun, Qiao; Zhou, Huan; Ge, Liang; Qu, Yanjie; Li, Taian; Ma, Xiaoxu; Li, Yajun; Bao, Hongli published the artcile< Iron-Catalyzed Radical Asymmetric Aminoazidation and Diazidation of Styrenes>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is azidoarylethyl benzenesulfonimide diazidoarylalkane enantioselective preparation; iron dioxazolinyldibenzofuran catalyst enantioselective aminoazidation diazidation aryl alkene; radical reaction mechanism iron catalyzed aminoazidation diazidation aryl alkene; aminoazidation; asymmetric catalysis; iron catalysis; radical group transfer.

Asym. aminoazidation and diazidation of alkenes are straightforward strategies to build value-added chiral nitrogen-containing compounds from feedstock chems. They provide direct access to chiral organoazides and complement enantioselective diamination. Despite the advances in non-asym. reactions, asym. aminoazidation or diazidation based on acyclic systems has not been previously reported. Here we describe the iron-catalyzed intermol. asym. aminoazidation and diazidation of styrenes. The method is practically useful and requires relatively low loading of catalyst and chiral ligand. With mild reaction conditions, the reaction can be completed on a 20 mmol scale. Studies of the mechanism suggest that the reaction proceeds via a radical pathway and involves stereocontrol of an acyclic free radical which probably takes place through a group transfer mechanism.

Angewandte Chemie, International Edition published new progress about Alkyl azides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (benzylic). 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

Hussain, Mudassar; Liaqat, Iram; Hanif, Uzma; Sultan, Aisha; Ara, Chaman; Aftab, Nauman; Urooj; Butt, Abida published the artcile< Medicinal perspective of antibacterial bioactive agents in earthworms (Clitellata, Annelida): a comprehensive review>, SDS of cas: 112-63-0, the main research area is review Clitellata Annelida peptide protein antibacterial bioactive agent; annelida; bioactive agents; earthworm; medicinal; peptides; proteins.

A review. Humoral practice is a fundamental natural biol. phenomenon in earthworm defensive system which protects them from infectious bacteria and irritating agents by different mechanisms. The defensive system of earthworms is highly complicated because they lack antibodies in their blood circulatory system but their body extracts and coelomic fluid comprise of different bioactive agents (i.e. peptides and proteins) that defend these worms. There are various groups of bioactive agents such as proteases (name depends on proteins/peptide function or formal earthworm species name), metabolites (total 59 metabolites found in Eisenia fetida), metal binding proteins (2 proteins such as Ca2+ binding calmodulin and metallothionein), active proteins (include lysozyme, lysenin and eiseniapore etc.), antimicrobial peptides (antibacterial vermi-peptides family (AVPF), antimicrobial peptide I (PP-I), coelomic cytolytic factor (CCF, CCF-I and CCF like protein)), fetidin, lysenin, lumbricin (lumbricin I, lumbricin PG, and lumbricusin), organic acids (fatty acids, succinic acids, and lauric acid) and other organic compounds (such as purine and vitamin D). The presence of above mentioned mols. confer therapeutic potential that affect energy intake and involve in decreasing oxidative stress, metabolic disturbances and pro-inflammatory conditions. The future perspectives of earthworm bioactive compounds are concerned with the development of provisional standards, purification and classification for utilizations in pharma industry.

Journal of Oleo Science published new progress about Annelida. 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

Garcia, Nuria; Garcia-Garcia, Patricia; Fernandez-Rodriguez, Manuel A.; Rubio, Ruben; Pedrosa, Maria R.; Arnaiz, Francisco J.; Sanz, Roberto published the artcile< Pinacol as a New Green Reducing Agent: Molybdenum-Catalyzed Chemoselective Reduction of Sulfoxides and Nitroaromatics>, Application of C19H34O2, the main research area is pinacol green reducing agent chemoselective reduction sulfoxide nitroarom; molybdenum catalyzed chemoselective reduction sulfoxide nitroarom pinacol reducing agent.

Pinacol is disclosed as a new chemoselective and environmentally benign reducing agent for sulfoxides and nitroaroms. assisted by readily available dichlorodioxomolybdenum(VI) complexes as catalysts. A wide range of substrates including those bearing challenging functional groups has been efficiently and selectively reduced with acetone and water being the only byproducts of these reactions.

Advanced Synthesis & Catalysis published new progress about Alkyl sulfoxides Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Kato, Makoto; Toshima, Kazunobu; Matsumura, Shuichi published the artcile< Direct Enzymatic Synthesis of a Polyester with Free Pendant Mercapto Groups>, Recommanded Product: (S)-Dimethyl 2-hydroxysuccinate, the main research area is hexanediol dimethyl mercaptosuccinate enzymic polymerization polyester preparation property; stereochem monomer effect enzymic polym dimethylmercaptosuccinate.

An aliphatic polyester with free pendant mercapto groups was prepared by direct lipase-catalyzed polycondensation of hexane-1,6-diol and di-Me 2-mercaptosuccinate. The polycondensation reaction using immobilized lipase from Candida antarctica (lipase CA) was carried out in bulk at 70 °C without any formation of disulfide or thioester linkages to produce the corresponding polyester with Mw = 14000 g/mol in high yield. The content of free mercapto groups in the polyester could be controlled by copolymerization with other monomers. The obtained polyester was easily crosslinked to form gels by the air oxidation of the pendant thiols to disulfides in DMSO. The effect of stereochem. of the monomers was studied.

Biomacromolecules published new progress about Crosslinking. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Recommanded Product: (S)-Dimethyl 2-hydroxysuccinate.

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

Lin, Aijun; Wang, Junying; Mao, Haibin; Shi, Yan; Mao, Zhijie; Zhu, Chengjian published the artcile< Organocatalytic Asymmetric Allylic Alkylation of Morita-Baylis-Hillman Carbonates with Phosphorus Ylides: Synthesis of Chiral 3-Substituted 2,4-Functionalized 1,4-Pentadienes>, Synthetic Route of 112-63-0, the main research area is chiral pentadiene preparation asym allylic alkylation cinchona alkaloid organocatalyst; enantioselective allylic substitution Morita Baylis Hillman carbonate phosphorus ylide.

A highly efficient asym. allylic substitution of Morita-Baylis-Hillman (MBH) carbonates with phosphorus ylides under the catalysis of modified cinchona alkaloids was developed. The reaction delivered products in moderate to good yields with excellent enantioselectivities (up to 98 % ee) for a wide range of MBH carbonates. The scope of the reaction was demonstrated by the synthesis of chiral 3-substituted 2,4-functionalized 1,4-pentadienes.

European Journal of Organic Chemistry published new progress about Alkadienes Role: SPN (Synthetic Preparation), PREP (Preparation) (pentadienes). 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

Chapman, Lauren M.; Beck, Jordan C.; Lacker, Caitlin R.; Wu, Linglin; Reisman, Sarah E. published the artcile< Evolution of a Strategy for the Enantioselective Total Synthesis of (+)-Psiguadial B>, Formula: C19H34O2, the main research area is enantioselective synthesis psiguadial B Wolff rearrangement asym ketene trapping; aminoquinolinamide enantioenriched synthesis; ortho quinone methide hetero Diels Alder psiguadial B synthesis; Prins cyclization psiguadial B synthesis; Norrish Yang cyclization psiguadial B synthesis; ring closing metathesis psiguadial B synthesis; intramol arylation psiguadial B synthesis.

(+)-Psiguadial B is a diformyl phloroglucinol meroterpenoid that exhibits antiproliferative activity against the HepG2 human hepatoma cancer cell line. This full account details the evolution of a strategy that culminated in the first enantioselective total synthesis of (+)-psiguadial B. A key feature of the synthesis is the construction of the trans-cyclobutane motif by a Wolff rearrangement with in situ catalytic, asym. trapping of the ketene. An investigation of the substrate scope of this method to prepare enantioenriched 8-aminoquinolinamides is disclosed. Three routes toward (+)-psiguadial B were evaluated that featured the following key steps: (1) an ortho-quinone methide hetero-Diels-Alder cycloaddition to prepare the chroman framework, (2) a Prins cyclization to form the bridging bicyclo[4.3.1]decane system, and (3) a modified Norrish-Yang cyclization to generate the chroman. Ultimately, the successful strategy employed a ring-closing metathesis to form the seven-membered ring and an intramol. O-arylation reaction to complete the polycyclic framework of the natural product.

Journal of Organic Chemistry published new progress about Addition reaction, stereoselective (tandem photochem. Wolff rearrangement/enantioselective ketene addition). 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

Liang, Jia-Quan; Chen, Xi; Cheng, Yong published the artcile< Paeoniflorin rescued MK-801-induced schizophrenia-like behaviors in mice via oxidative stress pathway>, HPLC of Formula: 112-63-0, the main research area is peoniflorin neuroprotectant oxidative stress schizophrenia; MK-801; olanzapine; oxidative stress; paeoniflorin; schizophrenia.

Schizophrenia (SCZ) affects approx. 1% population worldwide, and the first-line antipsychotics have partial reactivity or non-reactivity with side effects. Therefore, there is an urgent need to find more effective drugs. Paeoniflorin (PF) is the main effective component of traditional Chinese medicine from white peony, red peony and peony bark, which acts as a neuroprotective agent. The purpose of this study was to investigate whether PF can rescue MK-801 induced schizophrenia-like behavior in mice. Our results demonstrated that intragastric administration of PF ameliorated MK-801 induced schizophrenia-like behaviors in mice as demonstrated by prepulse inhibition of acoustic startle response, fear conditioning test for memory and open field test for activity. In contrast, the first-line antipsychotics-olanzapine reversed the prepulse inhibition deficits and hyperactivities, but not memory deficits, in the model mice. Further anal. showed that PF reduced oxidative stress in the MK-801-treated mice, as evidenced by the increased superoxide dismutase levels and decreased malondialdehyde levels in the blood of the model mice. In addition, PF treatment inhibited the expression of the apoptotic protein Bax and restored the expression of tyrosine hydroxylase in the brains of the model mice. in vitro data indicated that PF protected against oxidative stress induced neurotoxicity in the primary cultured hippocampal neurons. In conclusion, our results were the first to provide evidence that PF rescued schizophrenia-like behaviors (both pos. symptoms and cognitive impairments) in rodents through oxidative stress pathway, and therefore provide a novel strategy for treatment of SCZ. However, more pre-clin. and clin. research are needed to translate the present findings into clinics for a treatment of schizophrenia.

Frontiers in Nutrition published new progress about Antiapoptotic proteins Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (bax). 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