Tag: M.W=250-300

O’Toole, Sarah E.; Rose, Christopher A.; Gundala, Sivaji; Zeitler, Kirsten; Connon, Stephen J. published the artcile< Highly chemoselective direct crossed aliphatic-aromatic acyloin condensations with triazolium-derived carbene catalysts>, Synthetic Route of 112-63-0, the main research area is hydroxylketone derivative preparation; aliphatic aldehyde aromatic aldehyde acyloin condensation triazolium precatalyst.

It has been shown for the first time that triazolium precatalysts promote (in the presence of base) highly chemoselective crossed acyloin condensation reactions between aliphatic and ortho-substituted aromatic aldehydes. An o-bromine atom can serve as a temporary directing group to ensure high chemoselectivity (regardless of the nature of the other substituents on the aromatic ring) which then can be conveniently removed. The process is of broad scope and is operationally simple as it does not require the preactivation of any of the coupling partners to ensure selectivity. Preliminary data indicate that highly enantioselective variants of the reaction are feasible using chiral precatalysts.

Journal of Organic Chemistry published new progress about Acyloin condensation. 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

Li, Shoulei; Zhang, Enge; Feng, Junjun; Li, Xin published the artcile< An enantioselective conjugate addition reaction of 3-substituted benzothiophen-2-ones and 2-phthalimidoacrylates>, Synthetic Route of 112-63-0, the main research area is chiral benzothiophenone preparation; benzothiophenone phthalimidoacrylate enantioselective conjugate addition.

A highly enantioselective conjugate addition reaction of 3-substituted benzothiophen-2-ones to 2-phthalimidoacrylates has been developed using a bifunctional tertiary-amine thiourea catalyst. A number of chiral 3-substituted benzothiophen-2-one compounds I (R1 = Bn, i-Bu, (CH2)2COOMe, etc.; R2 = CH3, C2H5, Bn, etc.) were obtained with excellent yields (up to 99%) and very good stereoselectivities (up to >19 : 1 dr and up to 92% ee). The reaction was proved to be an efficient strategy for the synthesis of enantioenriched α-amino acid derivatives with 1,3-nonadjacent stereogenic centers.

Organic Chemistry Frontiers published new progress about Aromatic esters 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, Synthetic Route of 112-63-0.

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

Trang, Nguyen Thi Quynh; Long, Dang Thanh; Hong, Hoang Thi Kim published the artcile< Phytocomponents and antioxidant activity in the methanol extract of seed lotus (Nelumbo Nucifera Gaernt.) from Viet Nam>, HPLC of Formula: 112-63-0, the main research area is phytocomponent antioxidant activity methanol extract Nelumbo Nucifera.

In this study, we determined the phytocomponents using GC-MS and evaluated antioxidant activity by a 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay of the methanolic extract of six lotus varieties seed in Viet Nam (N.Nucifera). GC-MS chromatogram of the methanolic extract of six lotus varieties seed in Viet Nam showed 27 peaks which indicate the presence of 27 phytochem. constituents. The major phytochem. constituent is methyl-alpha-d-galactopyranoside (66,86-78,69%) in all lotus varieties. Antioxidant activity of liquid extract and condensed extract was found as 8.20-15.67 mg/mL and 0.850-1.286 mg/mL in comparison with IC50 of ascorbic acid (3.2μg/mL). Moreover, 50% of the DPPH scavenging ability of liquid and condensed extract differed from each other. From obtained results, the seeds of six lotus varieties in Viet Nam were found to be potential for bioactive compounds and antioxidant activity.

Research Journal of Biotechnology published new progress about Antioxidants. 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

Yang, Shyh-Ming; Kuo, Gee-Hong; Gaul, Michael D.; Murray, William V. published the artcile< Synthesis of β-Substituted Cyclic Enones via Phosphonium Salt-Activated, Palladium-Catalyzed Cross-Coupling of Cyclic 1,3-Diones>, Related Products of 112-63-0, the main research area is cyclic enone preparation; phosphonium salt activator palladium catalyst coupling reaction cycloalkanedione.

Phosphonium salt-activated, Pd-catalyzed Suzuki-Miyaura and Sonogashira cross-coupling reactions of cyclic 1,3-diones in the synthesis of β-substituted cyclic enones are described. These transformations exhibit good isolated yield and high generality with respect to both substrates and coupling partners. Extension of the substrate scope to cyclic 1,3-dione equivalent, such as 2-cyanocyclohexanone (4), is also briefly examined

Journal of Organic Chemistry published new progress about Alkynes Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Related Products of 112-63-0.

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

Matsufuji, Tetsuyoshi; Shimada, Kousei; Kobayashi, Shozo; Kawamura, Asuka; Fujimoto, Teppei; Arita, Tsuyoshi; Hara, Takashi; Konishi, Masahiro; Abe-Ohya, Rie; Izumi, Masanori; Sogawa, Yoshitaka; Nagai, Youko; Yoshida, Kazuhiro; Takahashi, Hisashi published the artcile< Discovery of novel chiral diazepines as bombesin receptor subtype-3 (BRS-3) agonists with low brain penetration>, Formula: C19H34O2, the main research area is diazepine chiral preparation bombesin receptor subtype 3 agonist; structure activity chiral diazepine bombesin receptor subtype 3 agonist; Bombesin receptor subtype-3 (BRS-3) agonists; Brain penetration; Diazepine.

The discovery and optimization of a novel series of BRS-3 agonists are described. We explored a potent BRS-3 agonist with low brain penetration to avoid an adverse effect derived from central nervous system exposure. Through the derivatization process, chiral diazepines I (R1 = iso-Bu, 2-methylpyridin-5-yl) were identified as possessing low brain penetration as well as potent in vitro activity against human and mouse BRS-3s.

Bioorganic & Medicinal Chemistry Letters published new progress about Bombesin receptor BB3 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Collins, Jon L.; Blanchard, Steven G.; Boswell, G. Evan; Charifson, Paul S.; Cobb, Jeff E.; Henke, Brad R.; Hull-Ryde, Emily A.; Kazmierski, Wieslaw M.; Lake, Debra H.; Leesnitzer, Lisa M.; Lehmann, Juergen; Lenhard, James M.; Orband-Miller, Lisa A.; Gray-Nunez, Yolanda; Parks, Derek J.; Plunkett, Kelli D.; Tong, Wei-Qin published the artcile< N-(2-Benzoylphenyl)-L-tyrosine PPARγ Agonists. 2. Structure-Activity Relationship and Optimization of the Phenyl Alkyl Ether Moiety>, Application of C19H34O2, the main research area is benzoylphenyltyrosine analog preparation structure PPARgamma agonist; peroxisome proliferator receptor benzoylphenyltyrosine analog antidiabetic.

We previously reported the identification of (2S)-((2-benzoylphenyl)amino)-3-{4-[2-(5-methyl-2-phenyloxazol-4-yl)ethoxy]phenyl}propanoic acid (I) (PPARγ pKi = 8.94, PPARγ pEC50 = 9.47) as a potent and selective PPARγ agonist. We now report the expanded structure-activity relationship around the Ph alkyl ether moiety by pursuing both a classical medicinal chem. approach and a solid-phase chem. approach for analog synthesis. The solution-phase strategy focused on evaluating the effects of oxazole and Ph ring replacements of the 2-(5-methyl-2-phenyloxazol-4-yl)ethyl side chain of I with several replacements providing potent and selective PPARγ agonists with improved aqueous solubility Specifically, replacement of the Ph ring of the phenyloxazole moiety with a 4-pyridyl group to give (2S)-((2-benzoylphenyl)amino)-3-{4-[2-(5-methyl-2-pyridin-4-yloxazol-4-yl)ethoxy]phenyl}propionic acid (PPARγ pKi = 8.85, PPARγ pEC50 = 8.74) or a 4-methylpiperazine to give (2S)-((2-benzoylphenyl)amino)-3-(4-{2-[5-methyl-2-(4-methylpiperazin-1-yl)thiazol-4-yl]ethoxy}phenyl)propionic acid (PPARγ pKi = 8.66, PPARγ pEC50 = 8.89) provided two potent and selective PPARγ agonists with increased solubility in pH 7.4 phosphate buffer and simulated gastric fluid as compared to I. The second strategy took advantage of the speed and ease of parallel solid-phase analog synthesis to generate a more diverse set of Ph alkyl ethers which led to the identification of a number of novel, high-affinity PPARγ ligands (PPARγ pKi’s 6.98-8.03). The combined structure-activity data derived from the two strategies provide valuable insight on the requirements for PPARγ binding, functional activity, selectivity, and aqueous solubility

Journal of Medicinal Chemistry published new progress about Antidiabetic agents. 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

Ortiz-Rivero, Elisa; Prorok, Katarzyna; Skowickl, Michal; Lu, Dasheng; Bednarkiewicz, Artur; Jaque, Daniel; Haro-Gonzalez, Patricia published the artcile< Single-Cell Biodetection by Upconverting Microspinners>, Electric Literature of 112-63-0, the main research area is single cell biodetection upconverting microspinner; bacteria; candida cell; optical trapping; spinner; upconversion.

Near-IR-light-mediated optical tweezing of individual upconverting particles has enabled all-optical single-cell studies, such as intracellular thermal sensing and minimally invasive cytoplasm studies. Furthermore, the intrinsic optical birefringence of upconverting particles renders them light-driven luminescent spinners with a yet unexplored potential in biomedicine. The use of upconverting spinners is showcased for the accurate and specific detection of single-cell and single-bacteria attachment events, through real-time monitoring of the spinners rotation velocity of the spinner. The phys. mechanisms linking single-attachment to the angular deceleration of upconverting spinners are discussed. Concomitantly, the upconversion emission generated by the spinner is harnessed for simultaneous thermal sensing and thermal control during the attachment event. Results here included demonstrate the potential of upconverting particles for the development of fast, high-sensitivity, and cost-effective systems for single-cell biodetection.

Small published new progress about Bacteria. 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

Xing, Da; Bawol, Pawel P.; Abd-El-Latif, Abd-El-Aziz A. A.; Zan, Lingxing; Baltruschat, Helmut published the artcile< Insertion of Magnesium into Antimony Layers on Gold Electrodes:Kinetic Behaviour>, Electric Literature of 112-63-0, the main research area is magnesium antimony layer gold electrode kinetic behavior diffusion coefficient.

Magnesium based secondary batteries are regarded as a viable alternative to the immensely popular Li-ion systems. One of the largest challenges is the selection of a Mg anode material since the insertion/extraction processes are kinetically slow because of the large ionic radius and high charge d. of Mg2+. In an attempt to bridge the gap between insertion measurements in 3D composite electrode materials and that in an idealized pure model system, we studied the insertion and diffusion of Mg in a thin, massive layer of Sb deposited on Au by using PITT, CV, and potential step experiments Sb has been suggested as an insertion material because magnesium can form intermetallic compound with it. The layered crystal structure of Sb leads should facilitate formation of such an intermetallic phase. Mg insertion from a MACC/tetraglyme electrolyte into Sb starts 300 mV pos. of the onset potential of Mg deposition as shown by cyclic voltammetry. The molar ratio of Mg to Sb agrees well with the stoichiometry of Mg3Sb2 alloy (Zintl-phase). The diffusion coefficient of Mg-insertion into Sb – layers and the charge transfer rate have been estimated by the above techniques. Such diffusion coefficients, albeit still somewhat “”apparent””, are much more closely related to the true diffusion coefficient in the metal or alloy. The solid-state diffusion coefficient of Mg into the Sb layers is in the range of 4-8×10-14 cm2 s-1. A very high Tafel slope of 370 mV/dec was found in potential step experiments Mg insertion was further investigated by XPS measurements. Besides Mg and Sb, Al and Cl signals were also detected, particularly at the outer parts of the layer.

ChemElectroChem published new progress about Binding energy. 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

Farid, Umar; Aiello, Maria Luisa; Connon, Stephen J. published the artcile< Highly Enantioselective Catalytic Kinetic Resolution of α-Branched Aldehydes through Formal Cycloaddition with Homophthalic Anhydrides>, Electric Literature of 112-63-0, the main research area is dihydroisocoumarin diastereoselective preparation; homophthalic anhydride aldehyde cycloaddition squaramide substituted catalyst; branched alc enantioselective preparation; chiral aldehyde enantioselective preparation reduction; aldehyde enantioselective catalytic kinetic resolution; cycloaddition reaction; dynamic kinetic resolution; enolizable anhydrides; lactones; organocatalysis.

A new catalytic methodol. was developed to promote an efficient one-pot kinetic resolution of racemic aldehydes ArCHRCHO [R = Me, Et, allyl; Ar = Ph, 1-naphthyl, 2-thienyl, etc.] with selectivity of up to 91 (99:1 d.r., >99 % ee) in a cycloaddition with enolizable anhydrides to afford dihydroisocoumarins I (a core prevalent in natural products and mols. of medicinal interest) containing three contiguous stereocenters.

Chemistry – A European Journal published new progress about Alcohols, chiral 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, Electric Literature of 112-63-0.

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

McIsaac, W. M.; Williams, R. T. published the artcile< Detoxication. LXX. Metabolism of hydrazide and hydroxamic acids derived from salicylic acid>, Computed Properties of 112-63-0, the main research area is SALICYLAMIDES.

A study has been made of the fate of salicylic acid hydrazide (I) and its N-acetyl derivative and of salicylohydroxamic acid (II) and its 5-Br derivative in the rabbit. II and its 5-Br derivative have also been studied in man, rat, and mouse. I is metabolized mainly by conjugation with glucuronic acid (55% of dose) and partly by hydrolysis to salicylic acid, which is excreted mainly as salicyluric acid. N1-Acetyl-N2-salicylohydrazine is not deacetylated and is excreted mainly as its glucuronide (70% of the dose). These hydrazides do not form ethereal sulfates. Their glucuronides have been isolated. II is metabolized by direct conjugation with glucuronic acid and H2SO4 in the rabbit, and there is practically no conversion into salicylamide. The glucuronide was isolated. In man, mouse, and the rat, it forms considerable amounts of salicylamide which is excreted conjugated. 5-Bromosalicylohydroxamic acid is excreted by man, mouse, rabbit, and rat mainly as conjugates of 5-bromosalicyl-amide and to a lesser extent as the glucuronide of the acid. The glucuronides of the amide and acid were isolated from rabbit urine. The in vitro tuberculostatic activity of the amide is about 1/2 that of the acid, its precursor in vivo. The toxicity of aroyl hydrazides and hydroxamic acids in relation to their metabolism is discussed.

Biochemical Journal published new progress about Urine. 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