Category: esters-buliding-blocks

Stachulski, Andrew V. published the artcileTherapeutic Potential of Nitazoxanide: An Appropriate Choice for Repurposing versus SARS-CoV-2?, Formula: C12H9N3O5S, the main research area is review COVID 19 nitazoxanide; COVID-19; SARS-CoV-2; antiviral; coronavirus; nitazoxanide; pharmacokinetics; tizoxanide.

The rapidly growing COVID-19 pandemic is the most serious global health crisis since the Spanish flu of 1918. There is currently no proven effective drug treatment or prophylaxis for this coronavirus infection. While developing safe and effective vaccines is 1 of the key focuses, a number of existing antiviral drugs are being evaluated for their potency and efficiency against SARS-CoV-2 in vitro and in the clinic. We review the significant potential of nitazoxanide (NTZ) as an antiviral agent that can be repurposed as a treatment for COVID-19. Originally, NTZ was developed as an antiparasitic agent especially against Cryptosporidium spp.; it was later shown to possess potent activity against a broad range of both RNA and DNA viruses, including influenza A, hepatitis B and C, and coronaviruses. Recent in vitro assessment of NTZ has confirmed its promising activity against SARS-CoV-2 with an EC50 of 2.12μM. We examine its drug properties, antiviral activity against different viruses, clin. trials outcomes, and mechanisms of antiviral action from the literature to highlight the therapeutic potential for the treatment of COVID-19. Furthermore, in preliminary PK/PD analyses using clin. data reported in the literature, comparison of simulated TIZ (active metabolite of NTZ) exposures at 2 doses with the in vitro potency of NTZ against SARS-CoV-2 gives further support for drug repurposing with potential in combination chemotherapy approaches. The review concludes with details of 2nd generation thiazolides under development that could lead to improved antiviral therapies for future indications.

ACS Infectious Diseases published new progress about COVID-19. 55981-09-4 belongs to class esters-buliding-blocks, name is 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, and the molecular formula is C12H9N3O5S, Formula: C12H9N3O5S.

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

Kelleni, Mina T. published the artcileNitazoxanide/azithromycin combination for COVID-19: A suggested new protocol for early management, SDS of cas: 55981-09-4, the main research area is COVID19 nitazoxanide azithromycin; Azithromycin; COVID-19; Interferons; Nitazoxanide; SARS CoV-2.

Azithromycin has been shown to have a clin. efficacy against severe acute respiratory syndrome coronavirus 2; ivermectin has also demonstrated a remarkable exptl. efficacy with a potential to be used for Coronavirus disease 2019. Further, BCG vaccination is being considered for clin. trials aiming to test its potential for lowering COVID-19 morbidity and mortality. This article illustrates some structural and functional relationships that may gather these drugs and the author, basing on a combined pathophysiol. and pharmacol. approach, recommends the FDA-approved antidiarrhea drug; nitazoxanide, which has been previously suggested but unfortunately widely ignored, to be tested in combination with azithromycin for their potential activity against SARS CoV-2, soonest. The author also recommends testing their combined administration as early during the clin. course of COVID-19 as possible. Further, basing on the same represented concept, the author suggests more trials for interferons to be tested against SARS CoV-2, especially in severe and critical COVID-19 cases.

Pharmacological Research published new progress about COVID-19. 55981-09-4 belongs to class esters-buliding-blocks, name is 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, and the molecular formula is C12H9N3O5S, SDS of cas: 55981-09-4.

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

Yavuz, Serap Simsek published the artcileAntiviral treatment of COVID-19, Synthetic Route of 55981-09-4, the main research area is review antiviral treatment COVID 19; Covid-19; Sars-CoV-2; antiviral.

Currently, there is not any specific effective antiviral treatment for COVID-19. Although most of the COVID-19 patients have mild or moderate courses, up to 5%-10% can have severe, potentially life threatening course, there is an urgent need for effective drugs. Optimized supportive care remains the mainstay of therapy. Thre have been more than 300 clin. trials going on, various antiviral and immunomodulating agents are in various stages of evaluation for COVID-19 in those trials and some of them will be published in the next couple of months. Despite the urgent need to find an effective antiviral treatment for COVID-19 through randomized controlled studies, certain agents are being used all over the world based on either in-vitro or extrapolated evidence or observational studies. Th most frequently used agents both in Turkey and all over the world including chloroquine, hydroxychloroquine, lopinavir/ ritonavir, favipiravir and remdesivir will be reviewed here. Nitazoxanide and ivermectin were also included in this review as they have recently been reported to have an activity against SARS-CoV-2 in vitro and are licensed for the treatment of some other human infections.

Turkish Journal of Medical Sciences published new progress about COVID-19. 55981-09-4 belongs to class esters-buliding-blocks, name is 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, and the molecular formula is C12H9N3O5S, Synthetic Route of 55981-09-4.

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

Owaba, Azibanasamesa D. C. published the artcilePhysicochemical and spectroscopic analysis of oils from Terminalia ivoriensis a Chev Combretaceae, HPLC of Formula: 111-11-5, the main research area is Terminalia oil seed extract physicochem spectroscopic analysis.

Terminalia ivoriensis A.Chev Combretaceae is a West African medicinal plant widely used by the Ijaws in the Niger Delta region of Nigeria for the treatment of malaria and management of erectile dysfunction in men. The Seeds were extracted using successive maceration at room temperature using n-hexane, dichloromethane and 70% methanol exhaustively and concentrated in vacuo, yielded 11.29, 10.03, and 0.954 percent of oily extracts resp. The samples were subjected to physicochem. anal. and the following parameters were obtained; 0.9104-0.9303, 1.466-1.474, 38.15-58.34mg/KOH, 84.2-115mg KOH/g, 15.23-24g I2/100g and 26-80meq/Kg, for relative d., refractive index, acid value, saponification value, iodine value, peroxide value resp. The GC-FID anal. of the oils showed that the oils contained 11 fatty acids and FT-IR result of the samples reveals that the oils contained fatty acid with a prominent characteristics peak at 1740 and 3004 cm-1 due to carbonyl and methoxyl group of esters resp. The physicochem. anal. revealed that the oils could be used for skincare, emollient, vehicle for topical agents and as an insect repellent in agriculture because of the pungent and irritating odor produced by the oils.

Asian Journal of Pharmaceutical Analysis and Medicinal Chemistry published new progress about Cropland. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, HPLC of Formula: 111-11-5.

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

Zainol, Muzakkir Mohammad published the artcileEsterification of Levulinic Acid to Ethyl Levulinate Using Liquefied Oil Palm Frond-Based Carbon Cryogel Catalyst, Application In Synthesis of 539-88-8, the main research area is levulinic acid esterification ethyl levulinate oil palm cryogel catalyst.

Oil palm biomass, which is abundantly available in Malaysia, has many types of applications in various industries. In this study, oil palm frond (OPF) was liquefied with 1-butyl-3-methylimidazole hydrogen sulfate ([BMIM][HSO4]) ionic liquid (IL) at optimum conditions. The liquefied OPF-ionic liquid (LOPF-IL) was mixed with furfural at a ratio of 0.8 (weight/weight), water-to-feedstock ratio of 0.125 (weight/weight), and sulfuric acid loading of 0.5 mL at 100°C for 1 h to form a gel. Carbon cryogel liquefied oil palm frond (CCOPF) was prepared using a freeze-dryer followed by calcination. CCOPF was further characterized using N2 sorption, NH3-TPD, TGA, XRD, FTIR, and FESEM to determine its phys. and chem. properties. The thermally stable CCOPF exhibited a large total surface area (578 m2/g) and high total acidity (17.6 mmol/g). Next, CCOPF was tested for levulinic acid catalytic esterification by varying the parameters including ethanol-to-levulinic acid molar ratio, catalyst loading, and reaction time at 78°C. At the optimum conditions, the conversion of levulinic acid and Et levulinate yield was 70.9 and 71.7 mol%, resp. CCOPF was reusable up to five runs with no significant conversion drop. Accordingly, CCOPF is conferred as a potential biomass-derived acid catalyst for Et levulinate production

BioEnergy Research published new progress about Cryogels. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application In Synthesis of 539-88-8.

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

Shao, Yuewen published the artcileSulfated Zirconia with Different Crystal Phases for the Production of Ethyl Levulinate and 5-Hydroxymethylfurfural, Safety of Ethyl 4-oxopentanoate, the main research area is ethyl levulinate sulfated zirconia crystal phase.

Distinct crystal phases of an oxide affect the configuration of surface atoms, which might further affect coordination with sulfate during sulfonation for the preparation of SO42-/MxOy type of acid catalyst. Herein, such an effect is investigated with zirconia of the tetragonal or monoclinic phase as the model catalysts. The results show that sulfonation inhibits the transformation of zirconia from the tetragonal phase to the monoclinic phase, whereas the varied phase of zirconia also affects the bonding patterns of sulfate species with zirconia in sulfonation. The sulfated zirconia of monoclinic phase contains more abundant acidic sites and more Bronsted acid sites than that of sulfated zirconia of tetragonal phase. Consequently, the sulfated zirconia of monoclinic phase is more active than the sulfated zirconia of tetragonal phase for the conversion of furfuryl alc. in ethanol and conversion of fructose in DMSO, achieving the yield of Et levulinate of 96.4% and a high yield of 5-hydroxymethylfurfural. The sulfated zirconia is not stable in protic solvent due to the leaching of sulfur species and the change in configurations of the sulfate species and the zirconium species, but in the aprotic solvent, they show good stability and recyclability.

Energy Technology (Weinheim, Germany) published new progress about Crystals. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Safety of Ethyl 4-oxopentanoate.

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

Yao, Lingyun published the artcileCharacterization of key aroma compounds in Xinjiang dried figs (Ficus carica L.) by GC-MS, GC-olfactometry, odor activity values, and sensory analyses, HPLC of Formula: 41114-00-5, the main research area is Ficus carica GCMS GC olfactometry odor activity sensory analysis.

Xinjiang is the main production area of figs in China. In this work, three different methods (SDE, SAFE, and SPME) were employed to extract the volatile compounds from Xinjiang dried figs. The exactions were then analyzed using aroma extract dilution anal. (AEDA) based on gas chromatog.-mass spectrometry (GC-MS) and gas chromatog.-olfactometry (GC-O). Seventy-five aroma-active compounds were identified with flavor dilutions (FD) factors ranging from 1 to 2187. Aroma compounds with odor activity value (OAV) greater than 10 were subsequently used in aroma reconstitution and omission experiments Based on instrumental anal. and sensory evaluation, 22 compounds were identified as the key aroma compounds and eight of these were evaluated as the most important aroma contributors of Xinjiang dried figs, including heptanal, nonanal, linalool, benzyl benzoate, styrene, eugenol, 2-methoxy-4-vinylphenol, and vanillin. Moreover, three volatile components, including 2-methoxy-4-methylphenol, 2-methoxy-4-vinylphenol and ortho-guaiacol, were identified as key aroma compounds of dried figs and have not been reported previously.

LWT–Food Science and Technology published new progress about Dilution. 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, HPLC of Formula: 41114-00-5.

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

Yao, Lingyun published the artcileCharacterization of key aroma compounds in Xinjiang dried figs (Ficus carica L.) by GC-MS, GC-olfactometry, odor activity values, and sensory analyses, Category: esters-buliding-blocks, the main research area is Ficus carica GCMS GC olfactometry odor activity sensory analysis.

Xinjiang is the main production area of figs in China. In this work, three different methods (SDE, SAFE, and SPME) were employed to extract the volatile compounds from Xinjiang dried figs. The exactions were then analyzed using aroma extract dilution anal. (AEDA) based on gas chromatog.-mass spectrometry (GC-MS) and gas chromatog.-olfactometry (GC-O). Seventy-five aroma-active compounds were identified with flavor dilutions (FD) factors ranging from 1 to 2187. Aroma compounds with odor activity value (OAV) greater than 10 were subsequently used in aroma reconstitution and omission experiments Based on instrumental anal. and sensory evaluation, 22 compounds were identified as the key aroma compounds and eight of these were evaluated as the most important aroma contributors of Xinjiang dried figs, including heptanal, nonanal, linalool, benzyl benzoate, styrene, eugenol, 2-methoxy-4-vinylphenol, and vanillin. Moreover, three volatile components, including 2-methoxy-4-methylphenol, 2-methoxy-4-vinylphenol and ortho-guaiacol, were identified as key aroma compounds of dried figs and have not been reported previously.

LWT–Food Science and Technology published new progress about Dilution. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Category: esters-buliding-blocks.

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

Li, Zheng published the artcileChemical Upcycling of Poly(3-hydroxybutyrate) into Bicyclic Ether-Ester Monomers toward Value-Added, Degradable, and Recyclable Poly(ether ester), Name: Ethyl 3-hydroxybutanoate, the main research area is chem upcycling polyhydroxybutyrate bicyclic monomers degradable polyether polyester; recyclable plastic waste.

The chem. recycling of plastic wastes into value-added products is an attractive strategy to reduce the consumption of fossil fuels and reduce the plastic pollution. We report here the facile upcycling of poly(3-hydroxybutyrate) (P3HB) into value-added polymerizable monomers and subsequent polymerization toward degradable and recyclable polymers. The bicyclic monomer 4-methyloctahydro-2H-benzo[b][1,4]dioxepin-2-one (4-MOHB) was first synthesized from P3HB through efficient steps. The obtained monomers underwent bulk ring-opening polymerization (ROP) catalyzed by stannous octoate (Sn(Oct)2) to give the amorphous materials. With benzyl alc. (BnOH) as an initiator, Sn(Oct)2 can effectively catalyze the ROP of bicyclic ether-ester monomers in a controllable fashion. Moreover, poly(4-methyloctahydro-2H-benzo[b][1,4]dioxepin-2-one) (P(4-MOHB)) showed a closed-loop recovery property due to the fused bicyclic monomer structure. The selective depolymerization of the P(4-MOHB) homopolymer back to 4-MOHB monomer can be easily realized using p-toluenesulfonic acid (TsOH) or Sn(Oct)2 as a catalyst in solution or in bulk. This strategy to recycle bioplastics into value-added materials has a promising application prospect and is beneficial to extend the life cycle of environment-friendly materials.

ACS Sustainable Chemistry & Engineering published new progress about Enthalpy. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Name: Ethyl 3-hydroxybutanoate.

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

Rao, A. V. R. Krishna published the artcileRole of oxygen defects in basicity of Se doped ZnO nanocatalyst for enhanced triglyceride transesterification in biodiesel production, Name: Methyl docosanoate, the main research area is biodiesel production triglyceride transesterification catalyst selenium doped zinc oxide.

We report herein, Se doped ZnO nanorods, a new heterogeneous base catalyst for transesterification of vegetable oil to fatty Me esters (FAME) or biodiesel. Surface area defects, mainly oxygen interstitials and oxygen vacancies, in the crystal lattice play essential role in enhancing basic site reactivity. The optimum transesterification reaction condition was found to be usage of 1:20 oil to methanol volume ratio, 5 weight% catalyst load, 65°C as reaction temperature to give a maximum yield of 94.7% FAME in 3 h. The nanocatalyst was recyclable without loss of FAME yield and can be used for industrial scale biodiesel production

Catalysis Communications published new progress about Basicity. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Name: Methyl docosanoate.

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