Month: October 2022

Zhang, Guoqi; Zeng, Haisu; Li, Sihan; Johnson, Jahvon; Mo, Zixuan; Neary, Michelle C.; Zheng, Shengping published the artcile< 1-D manganese(II)-terpyridine coordination polymers as precatalysts for hydrofunctionalization of carbonyl compounds>, HPLC of Formula: 403-41-8, the main research area is aldehyde ketone hydrofunctionalization manganese terpyridine coordination polymer catalyst.

Reductive catalysis with earth-abundant metals is currently of increasing importance and shows potential in replacing precious metal catalysis. In this work, catalytic hydroboration and hydrosilylation of ketones and aldehydes achieved by a structurally defined manganese(II) coordination polymer (CP) as a precatalyst under mild conditions is reported. The manganese-catalyzed methodol. can be applied to a range of functionalized aldehydes and ketones with turnover numbers (TON) of up to 990. Preliminary results on the regioselective catalytic hydrofunctionalization of styrenes by the Mn-CP catalyst are also presented.

Dalton Transactions published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 403-41-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H9FO, HPLC of Formula: 403-41-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ma, Shuai; Cui, Jing-Wang; Rao, Cai-Hui; Jia, Meng-Ze; Chen, Yun-Rui; Zhang, Jie published the artcile< Boosting activity of molecular oxygen by pyridinium-based photocatalysts for metal-free alcohol oxidation>, HPLC of Formula: 403-41-8, the main research area is boosting oxygen pyridinium photocatalyst metal alc oxidation.

An eco-friendly and economical approach for the photocatalytic oxidation of organic inter-mediates by air under mild conditions is highly desirable in green and sustainable chem., where the photogeneration of active oxygen species plays a key role in improving conversion efficiency and selectivity. By using pyridinium derivatives as mol. mediators for electron transfer and energy transfer, the simultaneous activation of O2 from air into superoxide radicals and singlet oxygen species can be achieved, and a photoinduced electron transfer catalytic system for the oxidation of alcs. has been developed. Thus, we have successfully simplified the complicated catalytic system into a single mol. catalyst without any addnl. noble metals and co-catalysts/additives. The current photocatalytic system shows high catalytic efficiency not only for aromatic alcs. but also for aliphatic alcs. that are generally difficult to undergo aerobic oxidation at room temperature under air atm., representing an ideal photocatalytic platform for green and economical organic syntheses.

Green Chemistry published new progress about Crystal structure. 403-41-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H9FO, HPLC of Formula: 403-41-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Liang; Ma, Mei-Yan; Sun, Ming; Jiang, Lu-Yi; Zhao, Xue-Tong; Fang, Xian-Xiu; Lam, Sin Man; Shui, Guang-Hou; Luo, Jie; Shi, Xiong-Jie; Song, Bao-Liang published the artcile< Endogenous sterol intermediates of the mevalonate pathway regulate HMGCR degradation and SREBP-2 processing>, Safety of (3S,9S,10R,13R,14R,17R)-10,13-Dimethyl-17-((R)-6-methylheptan-2-yl)-2,3,4,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol, the main research area is sterol HMGCR SREBP2 CYP51A1 signaling cervical cancer; 3-hydroxy-3-methylglutaryl-coenzyme A reductase degradation; clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR associated protein 9 (Cas9); lanosterol; mevalonate; sterol intermediates; sterol regulatory element-binding protein-2; sterol regulatory element-binding protein-2 cleavage.

Sterol-regulated HMG-CoA reductase (HMGCR) degradation and SREBP-2 cleavage are two major feedback regulatory mechanisms governing cholesterol biosynthesis. Reportedly, lanosterol selectively stimulates HMGCR degradation, and cholesterol is a specific regulator of SREBP-2 cleavage. However, it is unclear whether other endogenously generated sterols regulate these events. Here, we investigated the sterol intermediates from the mevalonate pathway of cholesterol biosynthesis using a CRISPR/Cas9-mediated genetic engineering approach. With a constructed HeLa cell line expressing the mevalonate transporter, we individually deleted genes encoding major enzymes in the mevalonate pathway, used lipidomics to measure sterol intermediates, and examined HMGCR and SREBP-2 statuses. We found that the C4-dimethylated sterol intermediates, including lanosterol, 24,25-dihydrolanosterol, follicular fluid meiosis activating sterol, testis meiosis activating sterol, and dihydro-testis meiosis activating sterol, were significantly upregulated upon mevalonate loading. These intermediates augmented both degradation of HMGCR and inhibition of SREBP-2 cleavage. The accumulated lanosterol induced rapid degradation of HMGCR, but did not inhibit SREBP-2 cleavage. The newly synthesized cholesterol from the mevalonate pathway is dispensable for inhibiting SREBP-2 cleavage. Together, these results suggest that lanosterol is a bona fide endogenous regulator that specifically promotes HMGCR degradation, and that other C4-dimethylated sterol intermediates may regulate both HMGCR degradation and SREBP-2 cleavage.

Journal of Lipid Research published new progress about Homo sapiens Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 434-16-2 belongs to class alcohols-buliding-blocks, and the molecular formula is C27H44O, Safety of (3S,9S,10R,13R,14R,17R)-10,13-Dimethyl-17-((R)-6-methylheptan-2-yl)-2,3,4,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Meng, Zhiyuan; Tian, Sinuo; Sun, Wei; Liu, Li; Yan, Sen; Huang, Shiran; Zhu, Wentao; Zhou, Zhiqiang published the artcile< Effects of exposure to prothioconazole and its metabolite prothioconazole-desthio on oxidative stress and metabolic profiles of liver and kidney tissues in male mice>, Related Products of 492-62-6, the main research area is prothioonazole fungiide metabolic disorder oxidative stress kidney; Metabolic profile; Oxidative stress; Prothioconazole; Prothioconazole-desthio.

Prothioconazole (PTC), a popular agricultural fungicide, and its main metabolite prothioconazole-desthio (PTCd) are receiving great attention due to their toxicol. effects in the non-target organisms. This study investigated their dosage-dependent (1 and 5 mg/kg BW/day) toxicol. effects on oxidative stress and metabolic profiles of liver and kidney tissues using male mice. PTC and PTCd significantly inhibited the growth phenotype including body weights gain, liver and kidney indexes. Furthermore, these effects were deeply investigated using the biomarkers of oxidative stress, and metabolomics. Notably, these effects were dose and tissue-dependent. Specifically, the more serious impacts involving oxidative stress and metabolic disorders were observed in the high concentration treatment groups. Also, the liver tissue was more severely affected than the kidney tissue. Lastly, the change in oxidative stress biomarkers and metabolomics profile revealed that PTCd induced more severe toxic effects than the parent compound PTC. In brief, these results indicate that exposure to PTC and PTCd could cause potential health risks in mammals.

Environmental Pollution (Oxford, United Kingdom) published new progress about Biomarkers. 492-62-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Related Products of 492-62-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Feng, Zhihui; Li, Yifan; Li, Ming; Wang, Yijun; Zhang, Liang; Wan, Xiaochun; Yang, Xiaogen published the artcile< Tea aroma formation from six model manufacturing processes>, Category: alcohols-buliding-blocks, the main research area is tea aroma formation processing; Aroma character impact; Precursors; Quantitative SPME; Tea aroma; Tea processing; Tea types; Volatiles.

Tea aroma is determined by the nature of the plant, the production processes, and many other factors influencing its formation and release. The objective of this study was to investigate the impact of manufacturing processes on the aroma composition of tea. Fresh tea leaves from the same cultivar and growing area were selected for producing the six types of tea: green, white, yellow, oolong, black, and dark teas. Comprehensive anal. by gas chromatog. mass spectrometry (GC/MS) was performed for the volatiles of tea infusion, prepared by solid-phase microextraction (SPME), solid-phase extraction (SPE), and solvent assisted flavor evaporation (SAFE). A total of 168 volatile compounds were identified. Black tea has the highest volatile concentration of 710 μg/g, while green tea has the lowest concentration of 20 μg/g. Significantly affected by these processes, tea aroma mols. are formed mainly from four precursor groups: carotenoids, fatty acids, glycosides, and amino acids/sugars.

Food Chemistry published new progress about Odor and Odorous substances. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kashiwadani, Hideki; Higa, Yurina; Sugimura, Mitsutaka; Kuwaki, Tomoyuki published the artcile< Linalool odor-induced analgesia is triggered by transient receptor potential ankyrin 1-independent pathway in mice>, Electric Literature of 78-70-6, the main research area is linalool odor analgesia transient receptor potential ankyrin 1; Analgesia; Linalool; TRPA1; TRPA1-deficient mice; TRPA1-selective antagonist.

Abstract: We had recently reported that linalool odor exposure induced significant analgesic effects in mice and that the effects were disappeared in olfactory-deprived mice in which the olfactory epithelium was damaged, thus indicating that the effects were triggered by chemial senses evoked by linalool odor exposure. However, the peripheral neuronal mechanisms, including linalool receptors that contribute toward triggering the linalool odor-induced analgesia, still remain unexplored. In vitro studies have shown that the transient receptor potential ankyrin 1 (TRPA1) responded to linalool, thus raising the possibility that TRPA1 expressed on the trigeminal nerve terminal detects linalool odor inhaled into the nostril and triggers the analgesic effects. To address this hypothesis, we measured the behavioral pain threshold for noxious mech. stimulation in TRPA1-deficient mice. In contrast to our expectation, we found a significant increase in the threshold after linalool odor exposure in TRPA1-deficient mice, indicating the analgesic effects of linalool odor even in TRPA1-deficient mice. Furthermore, intranasal application of TRPA1 selective antagonist did not alter the analgesic effect of linalool odor. These results showed that the linalool odor-induced analgesia was triggered by a TRPA1-independent pathway in mice.

Behavioral and Brain Functions published new progress about Analgesia. 78-70-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C10H18O, Electric Literature of 78-70-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Huang, Xiang-tao; Li, Xi; Xie, Ming-ling; Huang, Zhen; Huang, Yong-xiu; Wu, Gui-xian; Peng, Zhi-rong; Sun, Yan-ni; Ming, Qian-liang; Liu, Yan-xia; Chen, Jie-ping; Xu, Shuang-nian published the artcile< Resveratrol: Review on its discovery, anti-leukemia effects and pharmacokinetics>, Reference of 501-36-0 , the main research area is review resveratrol antileukemia agent pharmacokinetics leukemia; Anti-Leukemia; Drug candidate; Resveratrol.

A review. Resveratrol, found in variety of plants, is a natural stilbene structure polyphenol. It has various pharmacol. effects, such as antioxidation, anti-aging, anti-inflammation, anti-cancer, antiobesity, anti-diabetes, cardioprotection, neuroprotection. Recently, anti-leukemia activities of resveratrol has been studied extensively via its effects on a variety of biol. processes involving cell proliferation, apoptosis, autophagy. Current treatments of leukemia mainly rely on intensive chemotherapy or hematopoietic stem cell transplantation, however, these treatments are still with poor survival and high treatment-related mortality. Therefore, it is extremely needed to find relatively non-toxic medicines with minimal side effects but sufficient therapeutic efficacy. Resveratrol is one such potential candidate owing to its reported anti-leukemia effect. In this review, we summarized resveratrol’s discovery, sources and isolation methods, administration methods, effects in different types of leukemia, pharmacokinetics and toxicities, aiming to exploit resveratrol as a potential drug candidate for anti-leukemia.

Chemico-Biological Interactions published new progress about Anti-aging agents. 501-36-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C14H12O3, Reference of 501-36-0 .

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Greenhill, John V.; Ramli, Mohamed; Tomassini, Therezinha published the artcile< Reduction of enaminones in the preparation of 3-aminocyclohexanols. Novel preparation of tetronic acid>, Formula: C6H13NO, the main research area is aminocyclohexanol; cyclohexanol amino; reduction enaminone; tetronate.

Reduction of enaminones by Raney Ni gave the corresponding 3-aminocyclohexanols, of which the major product was trans when the substrate was N-unsubstituted. Thus 3-aminocyclohex-2-enone gave 75% of a 59:31 mixture of trans- and cis-3-aminocyclohexanol. The position of attack of NH3 on 2-acetylcyclopentanone and -hexanone was elucidated by reduction of the derived enaminones. The base attacked the side-chain CO in the former case but in the latter the ring CO was attacked. Reduction of 2-(substituted amino)fumaric esters gave enaminone analogs of tetronic acid (I), which on hydrolysis gave I.

Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent). 6850-39-1 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H13NO, Formula: C6H13NO.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Mortezaee, Keywan; Najafi, Masoud; Farhood, Bagher; Ahmadi, Amirhossein; Shabeeb, Dheyauldeen; Musa, Ahmed E. published the artcile< Resveratrol as an Adjuvant for Normal Tissues Protection and Tumor Sensitization>, Recommanded Product: (E)-5-(4-Hydroxystyryl)benzene-1,3-diol, the main research area is review resveratrol anticancer agent cancer; Resveratrol; chemotherapy; molecular targeted therapy; neoplasm; radiation; radiotherapy; tumor microenvironment..

A review. Cancer is one of the most complicated diseases in present-day medical science. Yearly, several studies suggest various strategies for preventing carcinogenesis. Furthermore, experiments for the treatment of cancer with low side effects are ongoing. Chemotherapy, targeted therapy, radiotherapy and immunotherapy are the most common non-invasive strategies for cancer treatment. One of the most challenging issues encountered with these modalities is low effectiveness, as well as normal tissue toxicity for chemo-radiation therapy. The use of some agents as adjuvants has been suggested to improve tumor responses and also alleviate normal tissue toxicity. Resveratrol, a natural flavonoid, has attracted a lot of attention for the management of both tumor and normal tissue responses to various modalities of cancer therapy. As an antioxidant and anti-inflammatory agent, in vitro and in vivo studies show that it is able to mitigate chemo-radiation toxicity in normal tissues. However, clin. studies to confirm the usage of resveratrol as a chemo-radioprotector are lacking. In addition, it can sensitize various types of cancer cells to both chemotherapy drugs and radiation. In recent years, some clin. studies suggested that resveratrol may have an effect on inducing cancer cell killing. Yet, clin. translation of resveratrol has not yielded desirable results for the combination of resveratrol with radiotherapy, targeted therapy or immunotherapy. In this paper, we review the potential role of resveratrol for preserving normal tissues and sensitization of cancer cells in combination with different cancer treatment modalities.

Current Cancer Drug Targets published new progress about Anti-inflammatory agents. 501-36-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C14H12O3, Recommanded Product: (E)-5-(4-Hydroxystyryl)benzene-1,3-diol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Mendoza-Pedroza, Jose de Jesus; Sanchez-Ramirez, Eduardo; Segovia-Hernandez, Juan Gabriel; Hernandez, Salvador; Orjuela, Alvaro published the artcile< Recovery of alcohol industry wastes: Revaluation of fusel oil through intensified processes>, Name: 2-Ethylhexan-1-ol, the main research area is alc industry waste fusel oil recovery.

Fusel oil is a mixture obtained as a side cut during ethanol distillation, mainly composed of i-amyl alc., water, ethanol, isobutanol, and other alcs. Currently, fusel separation into the constitutive alcs. is accomplished by batch or continuous distillation involving different columns in an energy-intensive process. Moreover, fusel oil presents a particular thermodn. behavior projected in several azeotropes, making the purification of fusel oil a challenging process. In this work is proposed a novel distillation scheme to purify isoamyl alc. from other fusel alcs. by using a dividing wall column scheme. In order to determine the benefits of using such intensified technol., a comparison with the conventional scheme was carried out. In order to accurately represent the thermodn. equilibrium, data for phase equilibrium was needed to the correctly design of the purification process. Both, the traditional distillation scheme and the dividing wall column were modeled using Aspen Plus and optimized by using a hybrid stochastic algorithm. Results indicate that the dividing wall column is not only more efficient in term of energy intensity (2785 kJ/kg Amyl alc.) against (3497 kJ/Kg Amyl alc.) the conventional scheme, but also it offers large economic savings compared with the conventional scheme (27% savings).

Chemical Engineering and Processing published new progress about Alcohols Role: IMF (Industrial Manufacture), PREP (Preparation). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Name: 2-Ethylhexan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts