Month: October 2022

Zhao, Ning; Zhou, Peng; Berova, Nina; Nakanishi, Koji published the artcile< Combined synthetic/CD strategy for the preparation and configurational assignments of model acyclic 1,3-polyols with a 1,2-diol terminal>, Category: esters-buliding-blocks, the main research area is CD spectra library configuration alditol; alditol preparation mol structure configuration.

Acyclic 1,3-polyols or skipped polyols are widely distributed in nature. Particularly skipped 1,3-polyols with a terminal 1,2-diol group are present in numerous antifungal polyene macrolides in various masked forms.’. Although over 200 polyene macrolides are known, the planar structures of only about 40 have been determined, while those for which the full stereochem. has been elucidated is less than ten. No simple method exists for configurational assignments of the 1,3-polyols moieties; moreover, this class of compounds are difficult to crystallize. In order to develop a general chiroptical method for structure determination of acyclic 1,3-polyols, we have combined a divergent synthetic approach with CD to prepare all possible stereoisomers of 1,2,4-triols, 1,2,4,6-tetrols and 1,2,4,6,8-pentols. The current set of reference polyols should be useful for setting up reference CD libraries and for model studies leading to a general method for configurational assignment of acyclic polyols. This strategy can be used to synthesize further extended members of acrylic 1,3-polyols and mixed 1,2/1,3-polyols which can be used for structural investigations of polyene macrolides and related compounds

Chirality published new progress about Alditols Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation). 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Category: esters-buliding-blocks.

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

Melfi, Diego Trevisan; Carvalho dos Santos, Kallynca; Ramos, Luiz Pereira; Corazza, Marcos Lucio published the artcile< Supercritical CO2 as solvent for fatty acids esterification with ethanol catalyzed by Amberlyst-15>, SDS of cas: 112-63-0, the main research area is carbon dioxide Amberlyst esterification catalyst fatty acid ethanol.

This work reports on the esterification of fatty acids with ethanol using Amberlyst-15 in a scCO2-assisted system. A factorial design was carried out for the following process variables: temperature (70°C-110°C), ethanol to acid molar ratio (3:1 to 9:1) and catalyst to acid concentration (5-20 wt%), with a fixed amount of CO2 added to the reactor (28.62 g). The best reaction condition led to an 87% conversion at 110°C, 9:1, and 20 wt% in 15 min of reaction time. An exploratory kinetic study illustrates the effect of catalyst amount and molar ratio in isothermal kinetic curves. Also, a catalyst reuse study was performed. Addnl., different carboxylic acids and methanol, instead of ethanol, were evaluated as reagents. At all proposed systems, the addition of scCO2 increased the reaction conversion.

Journal of Supercritical Fluids published new progress about Esterification. 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

Lin, Yu; Li, Zhanhui; Xu, Chen; Xia, Kaijiang; Wu, Shuwei; Hao, Yongjin; Yang, Qing; Ma, Haikuo; Zheng, Jiyue; Luo, Lusong; Zhu, Fang; He, Sudan; Zhang, Xiaohu published the artcile< Design, synthesis, and evaluation of novel CXCR4 antagonists based on an aminoquinoline template>, Category: esters-buliding-blocks, the main research area is CXCR4 antagonists chemokine CXCL12 GPCR aminoquinoline binding affinity migration; Aminoquinoline; Antagonist; CXCL12; CXCR4; Chemokine; GPCR.

The chemokine receptor CXCR4 has been explored as a drug target due to its involvement in pathol. conditions such as HIV infection and cancer metastasis. Here we report the structure-activity relationship study of novel CXCR4 antagonists based on an aminoquinoline template. This template is devoid of the chiral center in the classical tetrahydroquinoline (THQ) ring moiety and therefore can be easily synthesized. A number of potent CXCR4 antagonists were identified, exemplified by compound 3(I), which demonstrated excellent binding affinity with CXCR4 receptor (IC50 = 57 nM) and inhibited CXCL12 induced cytosolic calcium increase (IC50 = 0.24 nM). Furthermore, compound 3 potently inhibited CXLC12/CXCR4 mediated cell migration in a transwell invasion assay. The simplified synthetic approach combined with good physicochem. properties (e.g. MW 362, clogP 2.1, PSA 48, pKa 7.0 for compound 3) demonstrate the potential of this aminoquinoline template as a novel scaffold to develop CXCR4 antagonists.

Bioorganic Chemistry published new progress about Cell migration. 60705-25-1 belongs to class esters-buliding-blocks, and the molecular formula is C7H12O5, Category: esters-buliding-blocks.

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

Zheng, Liyou; Guo, Hongyan; Xie, Liangliang; Korma, Sameh A.; Jin, Jun; Jin, Qingzhe; Cacciotti, Ilaria published the artcile< Kinetic and thermodynamic studies of tocored thermal degradation in lipid systems with various degrees of unsaturation>, Reference of 112-63-0, the main research area is tocored thermal degradation lipid thermodn kinetics degree of unsaturation.

γ-Tocopherol-5,6-quinone (tocored) is a crucial minor component of edible oils. It has been certified to endow oils with an orange-red color and antioxidant activity. The tocored performance in lipid systems when exposed to heat should be investigated. Thus, the kinetics and thermodn. of tocored degradation in lipid systems with various degrees of unsaturation (Me palmitate, MP; Me oleate, MO; and Me linoleate, ML) were studied over a temperature range of 90-120°C. Tocored degradation probably followed zero-order kinetics, where the rate constant (3.22-24.59 and 23.18-299.2 mg kg-1 h-1 for MO and ML, resp.) significantly increased with increasing temperature (p < 0.05). The activation energy (Ea) values for the tocored degradation in MO and ML were 74.50 and 99.16 kJ mol-1, resp. Considering the thermodn. parameters (ΔH++>0, ΔS++<0, and ΔG++>0), the process both in MO and ML was endothermic and nonspontaneous. Above all, the kinetics and thermodn. data extend the knowledge on the tocored stability in oily systems, which is of vital importance for further oil industrial processing.

LWT–Food Science and Technology published new progress about Activation energy. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

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

Han, Fangbin; Lin, Songwen; Liu, Peng; Tao, Jing; Yi, Chongqin; Xu, Heng published the artcile< Synthesis and structure-activity relationships of PI3K/mTOR dual inhibitors from a series of 2-amino-4-methylpyrido[2,3-d]pyrimidine derivatives>, Application of C19H34O2, the main research area is pyridopyrimidine pyridine pyrimidine preparation anticancer antitumor agent; Anti-tumor activity; Dual inhibitor; Mammalian target of rapamycin; Phosphoinositide 3-kinase.

Inhibition of phosphoinositide 3-kinase (PI3K, phosphatidylinositol 3-kinase)/AKT/mammalian target of rapamycin (mTOR) signaling pathway by PI3K/mTOR dual inhibitors provides a promising new approach to the treatment of cancers. Target of rapamycin complex 1 (mTORC1) is a protein complex composed of TOR kinase/FRAP protein and proteins such as Raptor, GGβL, PRAS40 and Deptor (this complex is not associated with CREB-regulated transcription coactivator 1). Target of rapamycin complex 2 (mTORC2) is a protein complex composed of TOR kinase/FRAP protein and proteins such as Rictor, GβL and MAPKAP1 (this complex is not associated with CREB-regulated transcription coactivator 2). In this Letter, the authors have identified structurally novel and potent PI3K/mTOR dual inhibitors from a series of 2-amino-4-methylpyrido[2,3-d]pyrimidine derivatives Their synthesis and structure-activity relationships are reported. The synthesis of the target compounds was achieved by a coupling reaction of 6-bromo-4-methylpyrido[2,3-d]pyrimidin-2-amine with boronic acid reactants and/or aryl bromides. The title compounds thus formed included N-[5-(2-amino-4-methylpyrido[2,3-d]pyrimidin-6-yl)-2-methoxy-3-pyridinyl]-2,4-difluorobenzenesulfonamide and related substances.

Bioorganic & Medicinal Chemistry Letters published new progress about Amides Role: PAC (Pharmacological Activity), SPN (Synthetic Preparation), THU (Therapeutic Use), BIOL (Biological Study), PREP (Preparation), USES (Uses) (pyrido[2,3-d]pyrimidine derivatives). 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

Poole, Joshua; Jasbi, Paniz; Pascual, Agnes S.; North, Sean; Kwatra, Neha; Weissig, Volkmar; Gu, Haiwei; Bottiglieri, Teodoro; Jadavji, Nafisa M. published the artcile< Ischemic Stroke and Dietary Vitamin B12 Deficiency in Old-Aged Females: Impaired Motor Function, Increased Ischemic Damage Size, and Changed Metabolite Profiles in Brain and Cecum Tissue>, Synthetic Route of 112-63-0, the main research area is human ischemic stroke vitamin B12 deficiency brain cecum metabolite; aging; female; ischemic stroke; motor function; vitamin B12.

A vitamin B12 deficiency (vit. B12 def.) is common in the elderly, because of changes in metabolism Clin. studies have reported that a vit. B12 def. results in worse outcome after stroke, and the mechanisms through which a vit. B12 def. changes the brain requires further investigation. This study investigated the role of vit. B12 def. on stroke outcome and mechanisms using aged female mice. Eighteen-month-old females were put on a control or vit. B12 def. diet for 4 wk, after which an ischemic stroke was induced in the sensorimotor cortex. After damage, motor function was measured, the animals were euthanized, and tissues were collected for anal. Vit. B12 def. animals had increased levels of total homocysteine in plasma and liver, and choline levels were also increased in the liver. Vit. B12 def. animals had larger damage volume in brain tissue and more apoptosis. The cecum tissue pathway anal. showed dysfunction in B12 transport. The anal. of mitochondrial metabolomics in brain tissue showed reduced levels of metabolites involved in the TCA cycle in Vit. B12 def. animals. Motor function after stroke was impaired in vit. B12 def. animals. A dietary Vit. B12 def. impairs motor function through increased apoptosis and changes in mitochondrial metabolism in brain tissue.

Nutrients published new progress about Apoptosis. 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

Jiang, Hui; Zhang, Xinyu; Yang, Wanping; Li, Meiqi; Wang, Guohua; Luo, Qianqian published the artcile< Ferrostatin-1 ameliorates liver dysfunction via reducing iron in thioacetamide-induced acute liver injury in mice>, Name: Ethyl 3-amino-4-(cyclohexylamino)benzoate, the main research area is ferrostatin1 hepatoprotective agent iron metabolism liver injury; acute liver injury; deferoxamine; ferroportin; ferroptosis inhibitor; iron; thioacetamide; transferrin receptor 1.

Hepatic iron overload always leads to oxidative stress, which has been found to be involved in the progression of liver disease. However, whether iron disorder is involved in acute liver disease and the further mol. mechanisms remain unclear. A mice model of acute liver injury (ALI) was established via i.p. injection of thioacetamide (TAA) (250 mg/kg/day) for 3 consecutive days. Ferrostatin-1 (Fer-1) was administered i.p. (2.5μM/kg/day) starting 3 days before TAA treatment. Deferoxamine (DFO) was i.p. injected (200 mg/kg/day) with TAA treatment for 3 days. We further observed the effect of Fer-1 on TAA model with high-iron diet feeding. ALI was confirmed using histol. examination and liver function activity. Moreover, expressions of iron metabolism and ferroptosis proteins were measured by Western blot anal. The study revealed that the iron accumulation and ferroptosis contributed to TAA-induced ALI pathogenesis. TAA induced prominent inflammation and vacuolar degeneration in the liver as well as liver dysfunction. In addition, protein expression of the cystine/glutamate antiporter SLC7A11 (xCT) and glutathione peroxidase 4 (GPX4) was significantly decreased in the liver, while transferrin receptor 1 (TfR1), ferroportin (Fpn) and light chain of ferritin (Ft-L) expression levels were increased after TAA exposure. As the same efficiency as DFO, pre-administration of Fer-1 significantly decreased TAA-induced alterations in the plasma ALT, AST and LDH levels compared with the TAA group. Moreover, both Fer-1 and DFO suppressed TfR1, Fpn and Ft-L protein expression and decreased iron accumulation, but did not affect xCT or GPX4 expression in the liver. Both Fer-1and DFO prevented hepatic ferroptosis by reducing the iron content in the liver. Furthermore, Fer-1 also reduced iron and reversed liver dysfunction under iron overload conditions. These findings indicate a role of TAA-induced iron accumulation and ferroptosis in the pathogenesis of ALI model. The effect of Fer-1 was consistent with that of DFO, which prevented hepatic ferroptosis by reducing the iron content in the liver. Thus, Fer-1 might be a useful reagent to reverse liver dysfunction and decreasing the iron content of the liver may be a potential therapeutic strategy for ALI.

Frontiers in Pharmacology published new progress about Cystine-glutamate transporter subunit SLC7A11 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 347174-05-4 belongs to class esters-buliding-blocks, and the molecular formula is C15H22N2O2, Name: Ethyl 3-amino-4-(cyclohexylamino)benzoate.

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

Mamedov, Shamkhal; Gadzhiev, F. R.; Rzaev, A. S. published the artcile< Ethers of glycols and their derivatives. LXVII. Synthesis of alkoxymethyl ethers of ο- and p-ethylbenzyl alc>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is .

By the alk. method there were synthesized several new alkoxy derivatives of the Me ether of ο- and p-ethylbenzyl alc. and the ο- and p-monoethylbenzyl ether of ethylene glycol. To a mixture of ο- and p-ethylbenzyl alc. (16.3 g.), 21.78 g. PhNMe2, and 50 ml. dry Et2O, 24.5 g. α-chloromethyl isoamyl ether was added dropwise, and the mixture stirred and heated 4.5 hrs. at 30-40° and worked up to give 19.32 g. mixture of isopentoxymethyl ethers of ο- and p-ethylbenzyl alc. b5 141-2°, n20D 1.4828, d20 0.9392. Similarly, 9 new alkoxy ether mixtures of general formula ο- and p-EtC6H4CH2OCH2OR were obtained (R, % yield, b.p., n20D, and d20 given): Me, 58.7, b19 127-8°, 1.4972, 0.9877; Et, 60.0, b5 106-7°, 1.4920, 0.9721; iso-Pr, 52.0, b5 113-14°, 1.4857, 0.9523; Pr, 50.0, b5 123-4°, 1.4872, 0.9568; iso-Bu, 59.0, b5 129-30°, 1.4820, 0.9455; Bu, 65.6 b5 135-6°, 1.4840, 0.9483; Am, 60, b5 146-7°, 1.4833, 0.9420; n-C6H13, 66.6, b5 157-8°, 1.4806, 0.9312; and n-C7H15, 59.8, b5 167-8°, 1.4800, 0.9279. To a mixture of 34 g. ethylbenzyl alc., 50 g. acrylonitrile, and 150 ml. dry C6H6 1.5 g. MeONa was added, and the mixture stirred 5 hrs. at 40-50° and worked up to yield 94% mixture (I) of β-cyanoethyl ethers of ο- and p-ethylbenzyl alc., b1 137-8°, n20D 1.5080, d20 1.0108. To 90 g. MeOH saturated with 18 g. HCl 19 g. I was added, and the mixture heated 2 hrs. and worked up to give 48% mixture of β-carbomethoxyethyl ethers of ο- and p-ethylbenzyl alc. (II), b. 133-4°, n20D 1.4970, d20 1.0397. A mixture of 250 ml. MeOH, 13 g. NaOH, 13 ml. H2O, 15 ml. Et2O, and 15.54 g. II was kept 24 hrs., CO2 passed in, and the precipitate worked up to give 67.4% mixture of β-(ο- and p-ethylbenzoxy)propionic acids, b3 178-80°, n20D 1.5185, d20 1.0815. Ethylbenzyl alc. (50 g.) was saturated with gaseous HCHO, dry HCl passed in at 5-10°, and the mixture worked up to give 57% mixture (III) of chloromethyl ο- and p-ethylbenzyl ethers, b2 97-8°, n20D 1.5210, d20 1.0803. To PhONa from 26.5 g. PhOH and 4.6 g. Na, 18.5 g. III was added dropwise, and the mixture stirred and heated 4 hrs. at 50-60° and worked up to give 53% mixture of phenoxymethyl ethers of ο-and p-ethylbenzyl alc., b1 153-5°, n20D 1.5502, d20 1.0530. A mixture of 23.2 g. ethylbenzyl chloride, 37 g. BuOH, and 20 g. powd. NaOH was heated 8 hrs. at 80-90° and worked up to give 76.4% mixture of Bu ο- and p-ethylbenzyl ethers, b. 102-3°, n20D 1.4830, d20 0.9078. Similarly the following ethers of the general formula ο- and p-EtC6H4CH2OR were obtained (R, % yield, b.p., n20D, and d20 given): Pr, 82, b4 92-3°, 1.4910, 0.9178; iso-Bu, 60.0, b4 96-7°, 1.4862, 0.9088; iso-Am, 79.0, b4 108-9°, 1.4834, 0.8998. Am, 80.9, b4 113-14°, 1.4860, 0.9028; n-C6H13, 69.7, b4 128-9°, 1.4855, 0.9008; and n-C7H15, 73.4, b4 141-2°, 1.4850, 0.8981. A mixture of 250 g. ethylene glycol and powdered 100 g. NaOH was heated until the NaOH was dissolved, 154.5 g. ethylbenzyl chloride added dropwise, and the mixture heated with stirring 5 hrs. at 120-30° and worked up to give 52% mixture (IV) of mono ο- and p-ethylbenzyl ethers of ethylene glycol, b2 151-3°, n20D 1.5150, d20 1.0280. A mixture of 18 g. IV, 80.4 g. Ac2O, 50 ml. dry C6H6, and 2 drops H2SO4 was stirred and heated 4 hrs. at 30-40° and worked up to give 65% IV acetate, b2 126-8°, n20D 1.4985, d20 1.0391. To a mixture of 18 g. IV, 18.15 g. PhNMe2, and 50 ml. dry Et2O 18.4 g. chloromethyl Bu ether was added dropwise and the mixture stirred and heated 3 hrs. at 30-40° and worked up to give 51% mixture of ο- and p-ethylbenzyl butoxymethyl ethers of ethylene glycol, b3 157-8°, n20D 1.4809, d20 0.9684. Similarly the following ο- and p-EtC6H4CH2OCH2CH2OCH2OR were obtained (R, % yield, b.p., n20D, and d20 given): Me, 58, b12 156-7°, 1.4912, 1.0105; Et, 54.6, b3 137-9°, 1.4906, 0.9967; iso-Pr, 62.6, b3 147-8°, 1.4827, 0.9772; Pr, 55.5, b3 153-5°, 1.4847, 0.9842. Bu, 71.0, b3 162-3°, 1.4831, 0.9698; iso-Am, 62.8, b3 169-70°, 1.4812, 0.9629, Am, 62.5, b3 175-6°, 1.4821, 0.9659; n-C6H13, 67.7, b3 185-6°, 1.4807, 0.9539; and n-C7H15, 54.0, b3 192-3°, 1.4805, 0.9530.

Azerbaidzhanskii Khimicheskii Zhurnal published new progress about Ethers. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Baudoux, Jerome; Cahard, Dominique published the artcile< Electrophilic fluorination with N-F reagents>, COA of Formula: C19H34O2, the main research area is review.

A review. The preparation and use of electrophilic fluorinating agents containing the N-F moiety to give a C-f bond is reviewed.

Organic Reactions (Hoboken, NJ, United States) published new progress about Organic synthesis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

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

Andersons, J.; Kirpluks, M.; Cabulis, P.; Kalnins, K.; Cabulis, U. published the artcile< Bio-based rigid high-density polyurethane foams as a structural thermal break material>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is polyurethane foam thermal break material.

Sustainable development of building industry implies increasing usage of green materials. With this aim and for the intended application as a structural thermal break material, rigid high-d. polyurethane foams have been manufactured using polyols derived from renewable resources – tall oil fatty acids. Thermal conductivity, compressive strength and stiffness of the foams of d. ranging from ca. 100 to 680 kg/m3 have been determined Comparison of the bio-based foams with reference foams derived from petrochem. resources demonstrated similar performance characteristics thus suggesting that bio-based foams can also serve as structural thermal break materials. Anal. models are shown to enable estimation of d. dependence of the thermal and mech. properties of foams using the resp. exptl. determined characteristics of the monolithic polyurethane polymer.

Construction and Building Materials published new progress about Compressive modulus. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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