Category: 1750-45-4

As a common heterocyclic compound, it belongs to benzoxazole compound, name is 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, and cas is 1750-45-4, its synthesis route is as follows.

6-Hydroxy-5-chlorobenzo [d] oxazol-2 (3H) -one(1.8 g, 10 mmol),3-Bromomethyl-2H-1,2,3-triazole (1.8 g, 11 mmol),A mixture of potassium carbonate (2.8 g, 20 mmol) in acetonitrile (200 mL) was stirred at 70 C for 16 h,The solvent was removed in vacuo and the residue was purified by column chromatography on silica gel eluting with petroleum ether / ethyl acetate 20: 1,To give 3 – [(2H- 1,2,3 -triazol-2-yl) methyl) -5-chloro-6- hydroxybenzo [d] oxazol-2 (3H) -one as an orange solid (2.3 g, 85%)

1750-45-4, In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles.,1750-45-4 ,5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, other downstream synthetic routes, hurry up and to see

Reference：
Patent; Mudanjiang Medical School; Li Hailin; Wang Wei; Song Jing; Sun Zhiguo; Han Guangyu; (12 pag.)CN106928212; (2017); A;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

1750-45-4, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, cas is 1750-45-4,the benzoxazole compound, it is a common compound, a new synthetic route is introduced below.

5-chloro-6-hydroxy-1,3-benzoxazol-2(3H)-one (0.93 g, 5 mmol) and imidazole (1.00 g, 15 mmol) were dissolved in dimethylformamide (10 mL) with stirring under inert atmosphere. Triisopropylsilylchloride (1.15 g, 6 mmol) was added and the resulting solution was stirred for 3 days. The reaction mixture was partitioned between water and heptane. The organic layer was washed with water and dried over magnesium sulphate, filtrated and concentrated, to give 1.45 g (85%) of the subtitled compound as a grey solid. APCI-MS: m/z 342 [MH+]

Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand reaction routes of 1750-45-4, 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one

Reference：
Patent; ASTRAZENECA AB; WO2004/5295; (2004); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Application In Synthesis of 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one. Introducing a new discovery about 1750-45-4, Name is 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one

A comparison of three liquid chromatography (LC) retention time prediction models

High-resolution mass spectrometry (HRMS) data has revolutionized the identification of environmental contaminants through non-targeted analysis (NTA). However, chemical identification remains challenging due to the vast number of unknown molecular features typically observed in environmental samples. Advanced data processing techniques are required to improve chemical identification workflows. The ideal workflow brings together a variety of data and tools to increase the certainty of identification. One such tool is chromatographic retention time (RT) prediction, which can be used to reduce the number of possible suspect chemicals within an observed RT window. This paper compares the relative predictive ability and applicability to NTA workflows of three RT prediction models: (1) a logP (octanol-water partition coefficient)-based model using EPI Suite logP predictions; (2) a commercially available ACD/ChromGenius model; and, (3) a newly developed Quantitative Structure Retention Relationship model called OPERA-RT. Models were developed using the same training set of 78 compounds with experimental RT data and evaluated for external predictivity on an identical test set of 19 compounds. Both the ACD/ChromGenius and OPERA-RT models outperformed the EPI Suite logP-based RT model (R2 = 0.81?0.92, 0.86-0.83, 0.66?0.69 for training-test sets, respectively). Further, both OPERA-RT and ACD/ChromGenius predicted 95% of RTs within a ¡À 15% chromatographic time window of experimental RTs. Based on these results, we simulated an NTA workflow with a ten-fold larger list of candidate structures generated for formulae of the known test set chemicals using the U.S. EPA’s CompTox Chemistry Dashboard (https://comptox.epa.gov/dashboard), RTs for all candidates were predicted using both ACD/ChromGenius and OPERA-RT, and RT screening windows were assessed for their ability to filter out unlikely candidate chemicals and enhance potential identification. Compared to ACD/ChromGenius, OPERA-RT screened out a greater percentage of candidate structures within a 3-min RT window (60% vs. 40%) but retained fewer of the known chemicals (42% vs. 83%). By several metrics, the OPERA-RT model, generated as a proof-of-concept using a limited set of open source data, performed as well as the commercial tool ACD/ChromGenius when constrained to the same small training and test sets. As the availability of RT data increases, we expect the OPERA-RT model’s predictive ability will increase.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Application In Synthesis of 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, you can also check out more blogs about1750-45-4

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Application of 1750-45-4, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 1750-45-4, 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, introducing its new discovery.

Evaluation of the in?vitro and in?vivo metabolic pathway and cytochrome P450 inhibition/induction profile of Huperzine A

Huperzine A (HupA), one of the reversible and selective acetylcholinesterase inhibitors derived from Chinese herb Huperzia Serrata, possesses affirmative action of ameliorating cognitive dysfunction of Alzheimer’s disease. Up to now, the effects of HupA on human cytochrome P450s (CYPs) have not been fully elucidated. The purpose of the present study was to clarify the metabolic pathway of HupA in?vitro and in?vivo, and to evaluate the CYPs inhibition/induction profile of HupA in?vitro. The catalytic activity of CYP enzymes (CYP1A2, 2A6, 2C9, 2C19, 2D6, 2E1 and 3A4) was measured by the quantification of specific enzyme substrates using validated liquid chromatography-tandem mass spectrometry (LC/MS/MS) methods. The in?vivo metabolic pathway evaluation was performed in an open, single-dose pharmacokinetic study of HupA in fourteen elderly subjects, with urine collecting at certain intervals. In human liver microsomes, HupA (10?ng/mL) was not metabolized within 90?min, and it showed negligible inhibition against these CYP isoforms within 0.2?100?ng/mL. In human liver hepatocytes, the activities of CYP1A2 and CYP3A4 were not significantly altered when incubated at 2 or 20?ng/mL of HupA. After oral administration of 0.1?mg HupA, the total proportion of HupA excreted through urine was relatively high, accounting to 35¡À?9% at the limited time period of 48?h. These results suggest that HupA is substantially excreted by kidney unchanged rather than metabolized by human liver, and is unlikely to cause clinically relevant drug-drug interaction (DDI) when co-administrated with drugs that are metabolized by CYP isoenzyme system.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Application of 1750-45-4. In my other articles, you can also check out more blogs about 1750-45-4

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Application of 1750-45-4, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 1750-45-4, Name is 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, molecular formula is C7H4ClNO3. In a Article£¬once mentioned of 1750-45-4

Cytochrome P450 metabolic activities in the small intestine of cynomolgus macaques bred in cambodia, china, and indonesia

Summary: Cynomolgus macaques, used in drug metabolism studies due to their evolutionary closeness to humans, are mainly bred in Asian countries, including Cambodia, China, and Indonesia. Cytochromes P450 (P450s) are important drug-metabolizing enzymes, present in the liver and small intestine, major drug metabolizing organs. Previously, our investigation did not find statistically significant differences in hepatic P450 metabolic activities measured in cynomolgus macaques bred in Cambodia (MacfaCAM) and China (MacfaCHN). In the present study, P450 metabolic activity was investigated in the small intestine of MacfaCAM and MacfaCHN, and cynomolgus macaques bred in Indonesia (MacfaIDN) using P450 substrates, including 7-ethoxyresorufin, coumarin, bupropion, paclitaxel, diclofenac, S-mephenytoin, bufuralol, chlorzoxazone, and testosterone. The results indicated that P450 metabolic activity of the small intestine was not statistically significantly different (<2.0-fold) in MacfaCAM, MacfaCHN, and MacfaIDN. In addition, statistically significant sex differences were not observed (<2.0-fold) in any P450 metabolic activity in MacfaCAM as supported by mRNA expression results. These results suggest that P450 metabolic activity of the small intestine does not significantly differ statistically among MacfaCAM, MacfaCHN, and MacfaIDN. Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Application of 1750-45-4. In my other articles, you can also check out more blogs about 1750-45-4

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1750-45-4, name is 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, introducing its new discovery. COA of Formula: C7H4ClNO3

Inhibiton of cytochrome P450 isoenzymes and P-gp activity by multiple extracts of Huang-Lian-Jie-Du decoction

Ethnopharmacological relevance: Huang-Lian-Jie-Du-Decotion (HLJDD), an important traditional Chinese medicine formula, has been used for various diseases in clinical practice, and thus has high potential to induce cytochrome P450 (CYP) isoenzymes/P-glycoprotein (P-gp) mediated herb-drug interactions (HDIs) with other co-administered drugs. The purpose of this study was to investigate the in vitro effects of multiple extracts including aqueous extracts, total flavonoids, iridoids, alkaloids from HLJDD on the activities of CYPs in rats (CYP1A2, CYP2C6, CYP2D2, CYP2E1 and CYP3A1) and P-gp, and then to predict potential interactions with co-administered drugs. Materials and methods: The effects of the four extracts from HLJDD on the CYPs activity were evaluated in rat liver microsomes incubation system, and then determined by LC-MS/MS-based CYPs probe substrate assay. Caco-2 cell monolayer was used to investigate the effect of the four extracts on the efflux of Rhodamine 123 to evaluate their influences on P-gp activity. Results: The results show that total flavonoids and alkaloids exibited strong inhibition on rat CYP isoenzymes activities. Total flavonoids exhibited different inhibitory effects on CYPs activities with an order of CYP3A1 > CYP2C6 > CYP2E1 > CYP1A2 > CYP2D2, and the values of IC50 were 4.24, 8.16, 17.56, 19.03, 29.51 mug/mL, respectively. Total alkaloids possessed similar inhibition on CYPs and could strongly inhibit the activity of CYP2D2 (IC50=2.38 mug/mL), CYP3A1 (IC50=2.61 mug/mL), CYP2E1 (IC50=22.35 mug/mL), CYP1A2 (IC50=23.2 mug/mL) and CYP2C6 (IC50=43.09 mug/mL). Moderate degree of inhibition on CYPs activities was observed in aqueous and total iridoids extracts. Results from transport assay revealed that total flavonoids and alkaloids exhibited significant inhibitory effect on P-gp activity as evidenced by strong inhibition on the efflux of Rhodamine-123 with IC50 of 104.6 and 82.6 mug/mL. But aqueous extract showed weak and iridoids had negligible effect on P-gp activity. Conclusions: This study clearly demonstrated that total flavonoids and alkaloids from HLJDD can significantly inhibit the activities of CYPs and P-gp, which should be taken into consideration to predict any potential HDIs when HLJDD and its bioactive components are co-administered with other therapeutic drugs metabolized by CYPs or transported by P-gp.

We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 1750-45-4, and how the biochemistry of the body works.COA of Formula: C7H4ClNO3

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Synthetic Route of 1750-45-4, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.1750-45-4, Name is 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, molecular formula is C7H4ClNO3. In a Article£¬once mentioned of 1750-45-4

Short-term regulation of the hepatic activities of cytochrome P450 and glutathione S-transferase by nose-only cigarette smoke exposure in mice

The present study aimed to determine the effects of cigarette smoke on the regulation of hepatic cytochrome P450 (CYP) and glutathione S-transferase (GST) enzymes in male BALB/c mice exposed to nose-only cigarette smoke for 4 days. There were no significant increases in serum liver injury markers (alanine aminotransferase and aspartate aminotransferase) or oxidative stress (total antioxidant capacity, malondialdehyde, and glutathione disulfide/reduced glutathione) following cigarette smoke exposure, but malondialdehyde was elevated in the bronchoalveolar lavage fluid of smoke-exposed mice. Additionally, the hepatic microsomal protein levels of Cyp1a and Cyp2b, and the activities of ethoxyresorufin O-deethylase, pentoxyresorufin O-depenylase, and chlorzoxazone 6-hydrxylase, were elevated in smoke-exposed mice. Interestingly, the hepatic activities of GST toward 1-chloro-2,4-dinitrobenzene, 1,2-dichloro-4-nitrobenzene, and ethacrynic acid, but not cumene hydroperoxide were enhanced by cigarette smoke exposure, which was consistent with the increased expression levels of mu- and pi-class GSTs, but not alpha-class GSTs, observed in immunoblot analyses. These findings indicate that the short-term inhalation of cigarette smoke induces drug-metabolizing enzymes such as CYP1A, CYP2B, and mu/pi-class GSTs in the absence of hepatic injury and oxidative stress. Furthermore, smoking may alter hepatic drug metabolism, as well as the disposition and toxicity of xenobiotics, including some therapeutic drugs and cigarette smoke constituents.

We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 1750-45-4, and how the biochemistry of the body works.Synthetic Route of 1750-45-4

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Formula: C7H4ClNO3, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 1750-45-4, Name is 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, molecular formula is C7H4ClNO3

Cytochrome P450 enzymes contribute to the metabolism of LSD to nor-LSD and 2-oxo-3-hydroxy-LSD: Implications for clinical LSD use

In recent years, experimental research on lysergic acid diethylamide (LSD) in humans has gained new momentum. In humans, LSD is metabolized rapidly into several metabolites but knowledge of the involved metabolizing enzymes is limited. The aim of the current study was to identify the cytochrome P450 (CYP) isoforms involved in the metabolism of LSD to 6-norlysergic acid diethylamide (nor-LSD) and 2-oxo-3-hydroxy-LSD (O-H-LSD) in vitro, in order to evaluate potential effects of enzyme polymorphisms or prescription drugs on LSD pharmacokinetics. Additionally, interactions of LSD and both metabolites with 5-hydroxytryptamine (5-HT) receptors were assessed. LSD was incubated with human liver microsomes over 4 h and the production of nor-LSD and O-H-LSD was quantified by liquid chromatography tandem mass spectrometry. Metabolism was inhibited by the addition of specific CYP inhibitors. Additionally, recombinant CYPs were used to verify the inhibition results obtained with microsomes and induction of metabolism was investigated in human hepatocyte-derived cells. Radioligand binding and calcium mobilization assays were used to determine 5-HT receptor affinities and activities, respectively. Human liver microsomes displayed minor metabolite formation (<1% metabolized) over 4 h. CYP2D6, 2E1, and 3A4 significantly contributed to the formation of nor-LSD, and CYP1A2, 2C9, 2E1, and 3A4 were significantly involved in the formation of O-H-LSD. These findings could be verified using recombinant CYPs. Enzyme induction with rifampicin distinctly increased the formation of both metabolites, whereas treatment with omeprazole only slightly increased formation of nor-LSD. LSD and nor-LSD were pharmacologically active at the 5-HT1A, 5-HT2A, 5-HT2B, and 5-HT2C receptors. Nor-LSD mainly differed from the parent compound by having a lower affinity to the 5-HT2C receptor. O-H-LSD displayed substantially weaker affinity and activity at serotonergic receptors in comparison to LSD. To conclude, human liver microsomes converted only small amounts of LSD to nor-LSD and O-H-LSD but several CYPs significantly contributed. Genetic polymorphisms and drug interactions could therefore influence pharmacokinetics and pharmacodynamics of LSD. Nor-LSD likely has hallucinogenic activity similar to LSD, whereas O-H-LSD is inactive. Drug-drug interaction studies in humans are required to further assess the clinical relevance of these findings. One of the oldest and most widely used commercial enzyme inhibitors is aspirin, Formula: C7H4ClNO3, which selectively inhibits one of the enzymes involved in the synthesis of molecules that trigger inflammation. you can also check out more blogs about 1750-45-4

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Application In Synthesis of 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 1750-45-4, Name is 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, molecular formula is C7H4ClNO3

Resveratrol Pretreatment Affects CYP2E1 Activity of Chlorzoxazone in Healthy Human Volunteers

The purpose of the present study was to investigate the effect of resveratrol (RSV) pretreatment on CYP2E1 enzyme activity and pharmacokinetics of chlorzoxazone (CHZ) in healthy human volunteers. The open-label, two period, sequential study was conducted in 12 healthy human volunteers. A single dose of RSV 500 mg was administered once daily for 10 days during treatment phase. A single dose of CHZ 250 mg was administered during control and after treatment phases under fasting conditions. The blood samples were collected after CHZ dosing at predetermined time intervals and analyzed by HPLC. RSV pretreatment significantly enhanced the maximum plasma concentration (Cmax), area under the curve (AUC) and half life (T1/2) and significantly decreased elimination rate constant (Kel), apparent oral clearance (CL/F) and apparent volume of distribution (Vd/F) of CHZ as compared to that of control. In addition, RSV pretreatment significantly decreased the metabolite to parent (6-OHCHZ/CHZ) ratios of Cmax, AUC and T1/2 and significantly increased the Kel ratio of 6-OHCHZ/CHZ, which indicated the reduced formation of CHZ to 6-OHCHZ. The results suggest that the altered CYP2E1 enzyme activity and pharmacokinetics of CHZ might be attributed to RSV mediated inhibition of CYP2E1 enzyme. Thus, there is a potential pharmacokinetic interaction between RSV and CHZ. The inhibition of CYP2E1 by RSV may provide a novel approach for minimizing the hepatotoxicity of ethanol.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Application In Synthesis of 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1750-45-4, in my other articles.

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Product Details of 1750-45-4, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 1750-45-4, name is 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one. In an article£¬Which mentioned a new discovery about 1750-45-4

Supplementation with whey peptide rich in beta-lactolin improves cognitive performance in healthy older adults: A randomized, double-blind, placebo-controlled study

Epidemiological reports showed that consumptions of fermented dairy products are beneficial for cognitive decline in elderly. Our previous preclinical studies have demonstrated that intakes of whey peptide rich in the beta-lactolin [beta-lactopeptide of glycine-thereonine-tryptophan-tyrosine (GTWY)] improve memory and attention by regulating monoamine system, and clinical study using neuropsychological test suggested that consumptions with GTWY-rich whey peptide enhance cognitive performance associated with the frontal cortex activity. However, corresponding interventional studies in humans are limited. Objectives: to evaluate the effects of the whey peptide on cognitive functions in healthy older adults using a randomized, double-blinded, placebo-controlled trial design. 114 healthy subjects aged 50-75 were supplemented with the whey peptide or placebo for 12 weeks, and changes in cognitive function were assessed using neuropsychological tests at weeks 0, 6, and 12 of the intervention. Neuropsychological tests included assessments for memory functions (subtests from Wechsler memory scale-revised, standard verbal paired-associate learning test, and recognition memory test for faces), assessments for attention (cancelation and detection tests), and assessments for general cognitive functions (repeatable battery for assessments of neuropsychological status). Cerebral blood flow was also assessed using near-infrared spectroscopy (NIRS) after 6 weeks of intervention. This study was registered on the 19 November, 2017 in the database of the University Hospital Medical Information Network (UMIN) prior to enrollment of subjects (Registration No. UMIN000030461: https://www.umin.ac.jp/ctr/index-j.htm). In the whey peptide group, visual paired-associates I and visual cancelation tests were significantly improved compared with those in the placebo group at weeks 6 and 12 of the intervention, respectively. Visuospatial and constructional scores of the repeatable battery for assessments of neuropsychological status and standard verbal paired-associate learning tests (S-PA) also tended to be improved by the intervention at week 12. Daily intakes of GTWY-rich whey peptide show beneficial effects on cognitive performance, especially associative learning memory and control of attention, in healthy older adults and might prevent age-related cognitive declines.

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 1750-45-4, help many people in the next few years.Product Details of 1750-45-4

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem