Month: February 2022

An article Concise asymmetric synthesis of (-)-bilobalide WOS:000500036800055 published article about GINKGO-BILOBA; TERPENE TRILACTONES; IDENTIFICATION; CHEMISTRY; GLYCINE; ACID in [Baker, Meghan A.; Demoret, Robert M.; Ohtawa, Masaki; Shenvi, Ryan A.] Scripps Res Inst, Dept Chem, La Jolla, CA 92037 USA; [Ohtawa, Masaki] Kitasato Univ, Grad Sch Pharmaceut Sci, Tokyo, Japan in 2019, Cited 29. The Name is Methyl 2,2-dimethoxyacetate. Through research, I have a further understanding and discovery of 89-91-8. Quality Control of Methyl 2,2-dimethoxyacetate

The Ginkgo biloba metabolite bilobalide is widely ingested by humans but its effect on the mammalian central nervous system is not fully understood(1-4). Antagonism of gamma-aminobutyric acid A receptors (GABA(A)Rs) by bilobalide has been linked to the rescue of cognitive deficits in mouse models of Down syndrome(5). A lack of convulsant activity coupled with neuroprotective effects have led some to postulate an alternative, unidentified target(4); however, steric congestion and the instability of bilobalide(1,2,6) have prevented pull-down of biological targets other than the GABA(A)Rs. A concise and flexible synthesis of bilobalide would facilitate the development of probes for the identification of potential new targets, analogues with differential selectivity between insect and human GABA(A)Rs, and stabilized analogues with an enhanced serum half-life(7). Here we exploit the unusual reactivity of bilobalide to enable a late-stage deep oxidation that symmetrizes the molecular core and enables oxidation states to be embedded in the starting materials. The same overall strategy may be applicable to G. biloba congeners, including the ginkgolides-some of which are glycine-receptor-selective antagonists(8). A chemical synthesis of bilobalide should facilitate the investigation of its biological effects and its therapeutic potential.

Quality Control of Methyl 2,2-dimethoxyacetate. Welcome to talk about 89-91-8, If you have any questions, you can contact Baker, MA; Demoret, RM; Ohtawa, M; Shenvi, RA or send Email.

Reference:
Patent; U C B, Societe Anonyme; US4041077; (1977); A;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Recently I am researching about REDIRECTING SECONDARY BONDS; DIARYLIODONIUM SALTS; ALPHA-TOSYLOXYLATION; HYPERVALENT; IODINE(III); REACTIVITY; REAGENTS; OXO, Saw an article supported by the Fonds der Chemischen IndustrieFonds der Chemischen IndustrieEuropean Commission. Published in ROYAL SOC CHEMISTRY in CAMBRIDGE ,Authors: Boelke, A; Sadat, S; Lork, E; Nachtsheim, BJ. The CAS is 2005-10-9. Through research, I have a further understanding and discovery of 6H-Benzo[c]chromen-6-one. Computed Properties of C13H8O2

Bis-N-heterocycle-stabilized lambda(3)-iodanes (BNHIs) based on azoles are introduced as novel structural motifs in hypervalent iodine chemistry. A performance test in a variety of benchmark reactions including sulfoxidations and phenol dearomatizations revealed a bis-N-bound pyrazole substituted BNHI as the most reactive derivative. Its solid-state structure was characterized via X-ray analysis implying strong intramolecular interactions between the pyrazole nitrogen atoms and the hypervalent iodine centre.

Welcome to talk about 2005-10-9, If you have any questions, you can contact Boelke, A; Sadat, S; Lork, E; Nachtsheim, BJ or send Email.. Computed Properties of C13H8O2

Reference:
Article; Zhang, Jian; Shi, Dongdong; Zhang, Haifeng; Xu, Zheng; Bao, Hanyang; Jin, Hongwei; Liu, Yunkui; Tetrahedron; vol. 73; 2; (2017); p. 154 – 163;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

An article Identification of Cytotoxic Flavor Chemicals in Top-Selling Electronic Cigarette Refill Fluids WOS:000459698900043 published article about BRONCHIOLITIS OBLITERANS; MICROWAVE-POPCORN; TOXICITY; LIQUIDS; CINNAMALDEHYDE; PRODUCTS; FRUIT in [Hua, My; Omaiye, Esther E.] Univ Calif Riverside, Environm Toxicol Grad Program, Riverside, CA 92521 USA; [Luo, Wentai; McWhirter, Kevin J.; Pankow, James F.] Portland State Univ, Dept Chem, Portland, OR 97207 USA; [Luo, Wentai; McWhirter, Kevin J.; Pankow, James F.] Portland State Univ, Dept Civil & Environm Engn, Portland, OR 97207 USA; [Hua, My; Omaiye, Esther E.; Talbot, Prue] Univ Calif Riverside, Dept Mol Cell & Syst Biol, Riverside, CA 92521 USA in 2019, Cited 39. Recommanded Product: Methyl 3-phenyl-2-propenoate. The Name is Methyl 3-phenyl-2-propenoate. Through research, I have a further understanding and discovery of 103-26-4

We identified the most popular electronic cigarette (EC) refill fluids using an Internet survey and local and online sales information, quantified their flavor chemicals, and evaluated cytotoxicities of the fluids and flavor chemicals. Berries/Fruits/Citrus was the most popular EC refill fluid flavor category. Twenty popular EC refill fluids were purchased from local shops, and the ingredient flavor chemicals were identified and quantified by gas chromatography-mass spectrometry. Total flavor chemical concentrations ranged from 0.6 to 27.9 mg/ml, and in 95% of the fluids, total flavor concentration was greater than nicotine concentration. The 20 most popular refill fluids contained 99 quantifiable flavor chemicals; each refill fluid contained 22 to 47 flavor chemicals, most being esters. Some chemicals were found frequently, and several were present in most products. At a 1% concentration, 80% of the refill fluids were cytotoxic in the MTT assay. Six pure standards of the flavor chemicals found at the highest concentrations in the two most cytotoxic refill fluids were effective in the MTT assay, and ethyl maltol, which was in over 50% of the products, was the most cytotoxic. These data show that the cytotoxicity of some popular refill fluids can be attributed to their high concentrations of flavor chemicals.

Welcome to talk about 103-26-4, If you have any questions, you can contact Hua, M; Omaiye, EE; Luo, WT; McWhirter, KJ; Pankow, JF; Talbot, P or send Email.. Recommanded Product: Methyl 3-phenyl-2-propenoate

Reference:
Article; Weng, Shiue-Shien; Ke, Chih-Shueh; Chen, Fong-Kuang; Lyu, You-Fu; Lin, Guan-Ying; Tetrahedron; vol. 67; 9; (2011); p. 1640 – 1648;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

I found the field of Chemistry very interesting. Saw the article URJC-1-MOF as New Heterogeneous Recyclable Catalyst for C-Heteroatom Coupling Reactions published in 2019. Formula: C10H11NO4, Reprint Addresses Calleja, G (corresponding author), Rey Juan Carlos Univ, Dept Chem Energy & Mech Technol, C Tulipan S-N, Mostoles 28933, Spain.. The CAS is 99-27-4. Through research, I have a further understanding and discovery of Dimethyl 5-aminoisophthalate

Guillermo Calleja and co-workers from @urjc describe URJC-1-MOF as a new heterogeneous recyclable catalyst for c-heteroatom coupling reactions The capacity of copper-based URJC-1-MOF as a MOF catalyst in cross-coupling reactions has been evaluated, focusing on the Chan-Lam-Evans arylation-type reactions on amines and alcohols without extra additives or ligands. The extraordinary chemical and structural stability of URJC-1-MOF and its good specific surface, make this material a promising alternative to homogeneous Cu (II) catalysts for cross-coupling reactions. URJC-1-MOF showed a remarkable catalytic activity for cross-coupling C-N and C-O reactions, higher than other heterogeneous and homogeneous copper-based catalyst, such as CuO, HKUST-1, Cu-MOF-74, Cu(OAc)(2) and CuSO4.5H(2)O. Moreover, its easy recovery by simple filtration and reusability in successive runs without any loss of activity and stability, demonstrates the potential of URJC-1-MOF as an alternative catalyst for this kind of reactions in different chemical media of industrial interest.

Formula: C10H11NO4. Bye, fridends, I hope you can learn more about C10H11NO4, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Patent; ASTRA ZENECA AB; NPS PHARMACEUTICALS, INC.; WO2004/14881; (2004); A2;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

HPLC of Formula: C10H10O2. Rein, SM; Smith, CJ; Chaloner, C; Stafford, A; Rodger, AJ; Johnson, MA; McDonnell, J; Burns, F; Madge, S; Miners, A; Sherr, L; Collins, S; Speakman, A; Phillips, AN; Lampe, FC in [Rein, Sophia M.; Smith, Colette J.; Chaloner, Clinton; Rodger, Alison J.; McDonnell, Jeffrey; Burns, Fiona; Sherr, Lorraine; Speakman, Andrew; Phillips, Andrew N.; Lampe, Fiona C.] UCL, Inst Global Hlth, London, England; [Stafford, Adam; Johnson, Margaret A.; Burns, Fiona; Madge, Sara] Royal Free London NHS Fdn Trust, London, England; [Collins, Simon] HIV I Base, London, England; [Miners, Alec] London Sch Hyg & Trop Med LSHTM, London, England published Prospective association of social circumstance, socioeconomic, lifestyle and mental health factors with subsequent hospitalisation over 6-7 year follow up in people living with HIV in 2021.0, Cited 38.0. The Name is Methyl 3-phenyl-2-propenoate. Through research, I have a further understanding and discovery of 103-26-4.

Background: Predictors of hospitalisation in people with HIV (PLHIV) in the contemporary treatment era are not well understood. Methods: This ASTRA sub-study used clinic data linkage and record review to determine occurrence of hospitalisations among 798 PLHIV from baseline questionnaire (February to December 2011) until 1 June 2018. Associations of baseline social circumstance, socioeconomic, lifestyle, mental health, demographic and clinical factors with repeated all-cause hospitalisation from longitudinal data were investigated using Prentice-Williams-Peterson models. Associations were also assessed in 461 individuals on antiretroviral therapy (ART) with viral load <= 50 copies/ml and CD4 count >= 500 cells/ mu l. Findings: Rate of hospitalisation was 5.8/100 person-years (95% CI: 5.1-6.5). Adjusted for age, demographic group and time with diagnosed HIV, the following social circumstance, socioeconomic, lifestyle and mental health factors predicted hospitalisation: no stable partner (adjusted hazard ratio (aHR)=1.59; 95% CI=1.16-2.20 vs living with partner); having children (aHR=1.50; 1.08-2.10); non-employment (aHR=1.56; 1.07-2.27 for unemployment; aHR=2.39; 1.70-3.37 for sick/disabled vs employed); rented housing (aHR=1.72; 1.26-2.37 vs homeowner); not enough money for basic needs (aHR=1.82; 1.19-2.78 vs enough); current smoking (aHR=1.39; 1.02-1.91 vs never); recent injection-drug use (aHR=2.11; 1.30-3.43); anxiety symptoms (aHRs=1.39; 1.01-1.91, 2.06; 1.43-2.95 for mild and moderate vs none/minimal); depressive symptoms (aHRs=1.67; 1.17-2.38, 1.91; 1.30-2.78 for moderate and severe vs none/minimal); treated/untreated depression (aHRs=1.65; 1.03-2.64 for treated depression only, 1.87; 1.39-2.52 for depressive symptoms only; 1.53; 1.05-2.24; for treated depression and depressive symptoms, versus neither). Associations were broadly similar in those with controlled HIV and high CD4. Interpretation: Social circumstance, socioeconomic disadvantage, adverse lifestyle factors and poorer mental health are strong predictors of hospitalisation in PLHIV, highlighting the need for targeted interventions and care. (c) 2020 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

HPLC of Formula: C10H10O2. Welcome to talk about 103-26-4, If you have any questions, you can contact Rein, SM; Smith, CJ; Chaloner, C; Stafford, A; Rodger, AJ; Johnson, MA; McDonnell, J; Burns, F; Madge, S; Miners, A; Sherr, L; Collins, S; Speakman, A; Phillips, AN; Lampe, FC or send Email.

Reference:
Article; Weng, Shiue-Shien; Ke, Chih-Shueh; Chen, Fong-Kuang; Lyu, You-Fu; Lin, Guan-Ying; Tetrahedron; vol. 67; 9; (2011); p. 1640 – 1648;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Product Details of 2005-10-9. Authors Xu, P; Lopez-Rojas, P; Ritter, T in AMER CHEMICAL SOC published article about in [Xu, Peng; Lopez-Rojas, Priscila; Ritter, Tobias] Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany in 2021.0, Cited 49.0. The Name is 6H-Benzo[c]chromen-6-one. Through research, I have a further understanding and discovery of 2005-10-9

Abundant aromatic carboxylic acids exist in great structural diversity from nature and synthesis. To date, the synthetically valuable decarboxylative functionalization of benzoic acids is realized mainly by transition-metal-catalyzed decarboxylative cross couplings. However, the high activation barrier for thermal decarboxylative carbometalation that often requires 140 degrees C reaction temperature limits both the substrate scope as well as the scope of suitable reactions that can sustain such conditions. Numerous reactions, for example, decarboxylative fluorination that is well developed for aliphatic carboxylic acids, are out of reach for the aromatic counterparts with current reaction chemistry. Here, we report a conceptually different approach through a low-barrier photoinduced ligand to metal charge transfer (LMCT)-enabled radical decarboxylative carbometalation strategy, which generates a putative high-valent arylcopper(III) complex, from which versatile facile reductive eliminations can occur. We demonstrate the suitability of our new approach to address previously unrealized general decarboxylative fluorination of benzoic acids.

Welcome to talk about 2005-10-9, If you have any questions, you can contact Xu, P; Lopez-Rojas, P; Ritter, T or send Email.. Product Details of 2005-10-9

Reference:
Article; Zhang, Jian; Shi, Dongdong; Zhang, Haifeng; Xu, Zheng; Bao, Hanyang; Jin, Hongwei; Liu, Yunkui; Tetrahedron; vol. 73; 2; (2017); p. 154 – 163;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

An article Rhodium-Catalyzed Synthesis of Amides from Functionalized Blocked Isocyanates WOS:000485090400043 published article about N-ISOCYANATES; CYCLOADDITION REACTIONS; CARBOXYLIC-ACIDS; BOND FORMATION; AMIDATION; ISOTHIOCYANATES; HYDROAMINATION; 1,4-ADDITION; ALLYLATION; ACTIVATION in [Derasp, Joshua S.; Beauchemin, Andre M.] Univ Ottawa, Dept Chem & Biomol Sci, Ctr Catalysis Res & Innovat, Ottawa, ON K1N 6N5, Canada in 2019, Cited 80. Recommanded Product: 99-27-4. The Name is Dimethyl 5-aminoisophthalate. Through research, I have a further understanding and discovery of 99-27-4

Isocyanates are useful building blocks for the synthesis of amides, although their widespread use has been limited by their high reactivity, which often results in poor functional group tolerance and a propensity to oligomerize. Herein, a rhodium-catalyzed synthesis of amides is described coupling boroxines with blocked (masked) isocyanates. The success of the reaction hinges on the ability to form both the isocyanate and the organorhodium intermediates in situ. Relying on masked isocyanate precursors and on the high reactivity of the organorhodium intermediate results in broad functional group tolerance, including protic nucleophilic groups such as amines, anilines, and alcohols.

Welcome to talk about 99-27-4, If you have any questions, you can contact Derasp, JS; Beauchemin, AM or send Email.. Recommanded Product: 99-27-4

Reference:
Patent; ASTRA ZENECA AB; NPS PHARMACEUTICALS, INC.; WO2004/14881; (2004); A2;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Quality Control of Methyl 2,2-dimethoxyacetate. Liang, JJ; Chen, J; Wu, SB; Liu, C; Lei, M in [Liang, Jiajin; Chen, Jiao; Wu, Shubin; Liu, Chao; Lei, Ming] South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China published Comprehensive insights into xylan structure evolution via multi-perspective analysis during slow pyrolysis process in 2019, Cited 42. The Name is Methyl 2,2-dimethoxyacetate. Through research, I have a further understanding and discovery of 89-91-8.

Comprehension in hemicellulose pyrolysis is critical to generate renewable fuel and valuable chemical. Herein, a self-designed tubular reactor was applied to observe the appearance alteration and chemical structure evolution during the whole xylan pyrolysis process. Before 200 degrees C, it was free moisture removal stage without significant chemical structure alteration. Xylan began to depolymerize at 200 degrees C corresponding with the appearance change from its original state to dark brown, cleavage of branched-chain and primary product acids & ketones generation. The main chain of xylan was completely broken at 250-350 degrees C via beta-1,4-glycosidic bond cleavage, dehydration, decarboxylation, and decarbonylation reaction. Acids were mainly originated from hemicellulose pyrolysis. The typical signals from FTIR,C-13 CP/MAS NMR were disappeared at 350 degrees C. In the carbonation stage, the C/H and C/O ratio reached 2.01 and 4.54, leading to the aromaticity enhancement of char and formation of carbon-centered radicals.

Quality Control of Methyl 2,2-dimethoxyacetate. Welcome to talk about 89-91-8, If you have any questions, you can contact Liang, JJ; Chen, J; Wu, SB; Liu, C; Lei, M or send Email.

Reference:
Patent; U C B, Societe Anonyme; US4041077; (1977); A;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

An article Copper-Catalyzed C-H Fluorination/Functionalization Sequence Enabling Benzylic C-H Cross Coupling with Diverse Nucleophiles WOS:000562077400009 published article about BONDS; ACTIVATION; AMINATION; FUNCTIONALIZATION in [Vasilopoulos, Aristidis; Golden, Dung L.; Buss, Joshua A.; Stahl, Shannon S.] Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA in 2020.0, Cited 46.0. Computed Properties of C10H12O2. The Name is Methyl 3-phenylpropionate. Through research, I have a further understanding and discovery of 103-25-3

Site-selective transformation of benzylic C-H bonds into diverse functional groups is achieved via Cu-catalyzed C-H fluorination with N-fluorobenzenesulfonimide (NFSI), followed by substitution of the resulting fluoride with various nucleophiles. The benzyl fluorides generated in these reactions are reactive electrophiles in the presence of hydrogen-bond donors or Lewis acids, allowing them to be used without isolation in C-O, C-N, and C-C coupling reactions.

Computed Properties of C10H12O2. Welcome to talk about 103-25-3, If you have any questions, you can contact Vasilopoulos, A; Golden, DL; Buss, JA; Stahl, SS or send Email.

Reference:
Patent; SANOFI; US2011/294788; (2011); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

An article Sex differences in congestive markers in patients hospitalized for acute heart failure WOS:000627560200001 published article about GENDER-RELATED DIFFERENCES; PRESERVED EJECTION FRACTION; OUTCOMES; MANAGEMENT; AGE; INSIGHTS; IMPACT in [Espersen, Caroline; Lindner, Moritz; Solomon, Scott D.; Platz, Elke] Harvard Med Sch, Brigham & Womens Hosp, Cardiovasc Div, Dept Emergency Med, Boston, MA 02115 USA; [Campbell, Ross T.; Docherty, Kieran F.; Lee, Matthew M. Y.; McMurray, John J. V.] Univ Glasgow, Inst Cardiovasc & Med Sci, BHF Glasgow Cardiovasc Res Ctr, Glasgow, Lanark, Scotland; [Claggett, Brian; Lewis, Eldrin F.; Groarke, John D.] Stanford Univ, Med Ctr, Div Cardiovasc Med, Stanford, CA 94305 USA; [Biering-Sorensen, Tor] Univ Copenhagen, Herlev & Gentofte Hosp, Dept Cardiol, Fac Hlth Sci, Copenhagen, Denmark in 2021.0, Cited 24.0. The Name is Methyl 3-phenyl-2-propenoate. Through research, I have a further understanding and discovery of 103-26-4. Category: esters-buliding-blocks

Aims We sought to examine sex differences in congestion in patients hospitalized for acute heart failure (AHF). Understanding congestive patterns in women and men with AHF may provide insights into sex differences in the presentation and prognosis of AHF patients. Methods and results In a prospective, two-site study in adults hospitalized for AHF, four-zone lung ultrasound (LUS) was performed at the time of echocardiography at baseline (LUS1) and, in a subset, pre-discharge (LUS2). B-lines on LUS and echocardiographic images were analysed offline, blinded to clinical information and outcomes. Among 349 patients with LUS1 data (median age 74, 59% male, and 87% White), women had higher left ventricular ejection fraction (mean 43% vs. 36%, P < 0.001), higher tricuspid annular plane systolic excursion (mean 17 vs. 15 mm, P = 0.021), and higher measures of filling pressures (median E/e' 20 vs. 16, P < 0.001). B-line number on LUS1 (median 6 vs. 6, P = 0.69) and admission N-terminal pro-B-type natriuretic peptide levels (median 3932 vs. 3483 pg/ml, P = 0.77) were similar in women and men. In 121 patients with both LUS1 and LUS2 data, there was a similar and significant decrease in B-lines from baseline to discharge in both women and men. The risk of the composite 90 day outcome increased with higher B-line number on four-zone LUS2: unadjusted hazard ratio for each B-line tertile was 1.86 (95% confidence interval 1.08-3.20, P = 0.025) in women and 1.65 (95% confidence interval 1.03-2.64, P = 0.037) in men (interaction P = 0.72). Conclusions Among patients with AHF, echocardiographic markers differed between women and men at baseline, whereas B-line number on LUS did not. The dynamic changes in B-lines during a hospitalization for AHF were similar in women and men. Category: esters-buliding-blocks. Welcome to talk about 103-26-4, If you have any questions, you can contact Espersen, C; Campbell, RT; Claggett, B; Lewis, EF; Groarke, JD; Docherty, KF; Lee, MMY; Lindner, M; Biering-Sorensen, T; Solomon, SD; McMurray, JJV; Platz, E or send Email.

Reference:
Article; Weng, Shiue-Shien; Ke, Chih-Shueh; Chen, Fong-Kuang; Lyu, You-Fu; Lin, Guan-Ying; Tetrahedron; vol. 67; 9; (2011); p. 1640 – 1648;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics