Category: 80-59-1

Safety of (E)-2-Methylbut-2-enoic acid. Authors Shimshoni, JA; Barel, S; Mulder, PPJ in MDPI published article about in [Shimshoni, Jakob A.] Agr Res Org, Dept Food Qual & Safety, Volcani Ctr, Inst Postharvest & Food Sci, IL-753593 Rishon Letsyion, Israel; [Barel, Shimon] Kimron Vet Inst, Dept Toxicol, IL-50250 Bet Dagan, Israel; [Mulder, Patrick P. J.] Wageningen Univ & Res, Wageningen Food Safety Res, POB 230, NL-6700 AE Wageningen, Netherlands in 2021, Cited 32. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1

Pyrrolizidine alkaloids (PAs) are genotoxic carcinogenic phytotoxins mostly prevalent in the Boraginaceae, Asteraceae and Fabaceae families. Heliotropium species (Boraginaceae) are PA-producing weeds, widely distributed in the Mediterranean region, that have been implicated with lethal intoxications in livestock and humans. In Israel, H. europaeum, H. rotundifolium and H. suaveolens are the most prevalent species. The toxicity of PA-producing plants depends on the PA concentration and composition. PAs occur in plants as mixtures of dozens of various PA congeners. Hence, the risk arising from simultaneous exposure to different congeners has to be evaluated. The comparative risk evaluation of the three Heliotropium species was based on recently proposed interim relative potency (iREP) factors, which take into account certain structural features as well as in vitro and in vivo toxicity data obtained for several PAs of different classes. The aim of the present study was to determine the PA profile of the major organ parts of H. europaeum, H. rotundifolium and H. suaveolens in order to assess the plants’ relative toxic potential by utilizing the iREP concept. In total, 31 different PAs were found, among which 20 PAs were described for the first time for H. rotundifolium and H. suaveolens. The most prominent PAs were heliotrine-N-oxide, europine-N-oxide and lasiocarpine-N-oxide. Europine-N-oxide displayed significant differences among the three species. The PA levels ranged between 0.5 and 5% of the dry weight. The flowers of the three species were rich in PAs, while the PA content in the root and flowers of H. europaeum was higher than that of the other species. H. europaeum was found to pose a higher risk to mammals than H. rotundifolium, whereas no differences were found between H. europaeum and H. suaveolens as well as H. suaveolens and H. rotundifolium.

Bye, fridends, I hope you can learn more about C5H8O2, If you have any questions, you can browse other blog as well. See you lster.. Safety of (E)-2-Methylbut-2-enoic acid

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

An article Asymmetric hydrogenation of an a-unsaturated carboxylic acid catalyzed by intact chiral transition metal carbonyl clusters – diastereomeric control of enantioselectivity WOS:000526110700040 published article about RUTHENIUM COMPLEXES; HETEROGENEOUS CATALYSIS; TRIOSMIUM CLUSTERS; REACTIVITY; MECHANISM; CRYSTAL; LIGANDS; SULFIDO; SPECTROSCOPY; CONVERSION in [Abdel-Magied, Ahmed F.; Theibich, Yusuf; Singh, Amrendra K.; Rahaman, Ahibur; Raha, Arun K.; Nordlander, Ebbe] Lund Univ, Dept Chem, Chem Phys, Box 124, SE-22100 Lund, Sweden; [Doverbratt, Isa] Lund Univ, Ctr Anal & Synth, Dept Chem, Box 124, SE-22100 Lund, Sweden; [Haukka, Matti] Univ Jyvaskyla, Dept Chem, Box 35, FI-40014 Jyvaskyla, Finland; [Richmond, Michael G.] Univ North Texas, Dept Chem, Denton, TX 76203 USA in 2020, Cited 48. Name: (E)-2-Methylbut-2-enoic acid. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1

Twenty clusters of the general formula [(mu-H)(2)Ru-3(mu(3)-S)(CO)(7)(mu-P-P*)] (P-P* = chiral diphosphine of the ferrocene-based Walphos or Josiphos families) have been synthesised and characterised. The clusters have been tested as catalysts for asymmetric hydrogenation of tiglic acid [trans-2-methyl-2-butenoic acid]. The observed enantioselectivities and conversion rates strongly support catalysis by intact Ru-3 clusters. A catalytic mechanism involving an active Ru-3 catalyst generated by CO loss from [(mu-H)(2)Ru-3(mu(3)-S) (CO)(7)(mu-P-P*)] has been investigated by DFT calculations.

Name: (E)-2-Methylbut-2-enoic acid. Bye, fridends, I hope you can learn more about C5H8O2, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

HPLC of Formula: C5H8O2. Authors Shimshoni, JA; Barel, S; Mulder, PPJ in MDPI published article about in [Shimshoni, Jakob A.] Agr Res Org, Dept Food Qual & Safety, Volcani Ctr, Inst Postharvest & Food Sci, IL-753593 Rishon Letsyion, Israel; [Barel, Shimon] Kimron Vet Inst, Dept Toxicol, IL-50250 Bet Dagan, Israel; [Mulder, Patrick P. J.] Wageningen Univ & Res, Wageningen Food Safety Res, POB 230, NL-6700 AE Wageningen, Netherlands in 2021, Cited 32. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1

Pyrrolizidine alkaloids (PAs) are genotoxic carcinogenic phytotoxins mostly prevalent in the Boraginaceae, Asteraceae and Fabaceae families. Heliotropium species (Boraginaceae) are PA-producing weeds, widely distributed in the Mediterranean region, that have been implicated with lethal intoxications in livestock and humans. In Israel, H. europaeum, H. rotundifolium and H. suaveolens are the most prevalent species. The toxicity of PA-producing plants depends on the PA concentration and composition. PAs occur in plants as mixtures of dozens of various PA congeners. Hence, the risk arising from simultaneous exposure to different congeners has to be evaluated. The comparative risk evaluation of the three Heliotropium species was based on recently proposed interim relative potency (iREP) factors, which take into account certain structural features as well as in vitro and in vivo toxicity data obtained for several PAs of different classes. The aim of the present study was to determine the PA profile of the major organ parts of H. europaeum, H. rotundifolium and H. suaveolens in order to assess the plants’ relative toxic potential by utilizing the iREP concept. In total, 31 different PAs were found, among which 20 PAs were described for the first time for H. rotundifolium and H. suaveolens. The most prominent PAs were heliotrine-N-oxide, europine-N-oxide and lasiocarpine-N-oxide. Europine-N-oxide displayed significant differences among the three species. The PA levels ranged between 0.5 and 5% of the dry weight. The flowers of the three species were rich in PAs, while the PA content in the root and flowers of H. europaeum was higher than that of the other species. H. europaeum was found to pose a higher risk to mammals than H. rotundifolium, whereas no differences were found between H. europaeum and H. suaveolens as well as H. suaveolens and H. rotundifolium.

HPLC of Formula: C5H8O2. Welcome to talk about 80-59-1, If you have any questions, you can contact Shimshoni, JA; Barel, S; Mulder, PPJ or send Email.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Safety of (E)-2-Methylbut-2-enoic acid. In 2020 FOOD ADDIT CONTAM A published article about MASS-SPECTROMETRY; ECHIUM-VULGARE; N-OXIDES; CYNOGLOSSUM-OFFICINALE; VENOOCCLUSIVE DISEASE; METABOLIC-ACTIVATION; MEDICINAL-PLANTS; RISK-ASSESSMENT; IDENTIFICATION; BIOSYNTHESIS in [Maedge, Inga; Gehling, Matthias; Schoene, Cindy; These, Anja] German Fed Inst Risk Assessment, Dept Safety Food Chain, Max Dohrn Str 8-10, D-10589 Berlin, Germany; [Maedge, Inga; Winterhalter, Peter] Tech Univ Carolo Wilhelmina Braunschweig, Inst Food Chem, Braunschweig, Germany in 2020, Cited 64. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1.

Pyrrolizidine alkaloids (PAs) and their corresponding N-oxides (PANOs) have been determined in food and feed at levels relevant for consumer health. More than 660 different PAs have been detected, but few are available as reference substances for analytical demands. In the context of the European legislation on maximum levels of PAs in food products, a defined analytical scope of 21 PAs for determination has been suggested. An expansion of the scope from 21 to 35 PAs, including 14 structural isomers, is currently under discussion. In the present study, a target screening method was established for a comprehensive characterisation of PA profiles of the species Echium vulgare, Heliotropium europaeum, Cynoglossum officinale and Symphytum spp. to assess whether an expansion of the analytical scope is required to quantitatively cover the total PA contents of Boraginaceae species. The scope of the method comprised known and unknown PAs previously screened and confirmed in the respective plant extracts. A total of 176 PAs and PANOs were detected. The toxic 1,2-unsaturated PAs represent the predominant PA type with about 98% of the mean total content. This PA profiling demonstrates that an expansion of the scope from 21 to 35 PAs is required to adequately cover the mean total PA contents of Cynoglossum officinale and H. europaeum, whereas in the case of Symphytum spp. and Echium vulgare an expansion would not be necessary.

Welcome to talk about 80-59-1, If you have any questions, you can contact Madge, I; Gehling, M; Schone, C; Winterhalter, P; These, A or send Email.. Safety of (E)-2-Methylbut-2-enoic acid

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

In 2020 PHYS PLASMAS published article about PLASMA in [Geng, Yixing; Li, Dongyu; Zhang, Siyuan; Wu, Minjian; Yang, Tong; Zhu, Jungao; Hu, Xiyao; Zhao, Yanying; Yan, Xueqing; Lin, Chen] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China; [Geng, Yixing; Li, Dongyu; Zhang, Siyuan; Wu, Minjian; Yang, Tong; Zhu, Jungao; Hu, Xiyao; Zhao, Yanying; Yan, Xueqing; Lin, Chen] Peking Univ, Key Lab HEDP, Minist Educ, CAPT, Beijing 100871, Peoples R China; [Geng, Yixing; Li, Dongyu; Zhang, Siyuan; Wu, Minjian; Yang, Tong; Zhu, Jungao; Hu, Xiyao; Zhao, Yanying; Yan, Xueqing; Lin, Chen] Beijing Laser Accelerat Innovat Ctr, Beijing 101400, Peoples R China; [Wang, Dan; Yan, Lixin] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China in 2020, Cited 31. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1. COA of Formula: C5H8O2

We have studied the generation of terahertz (THz) radiation via the interaction of an intense femtosecond laser pulse with aluminum (Al) and plastic targets pre-ablated by a picosecond ablation pulse. The measurements of the plasma shadowgraph and 1D-MULTI simulations show a similar micrometer density scale length of the pre-ablated plasma for the two types of targets after ablation. It is found that for the Al target, the intensity of THz radiation increased obviously under the condition of ablation, and only with the appropriate ablation delay time, the cutoff energy and charge of the accelerated protons also increased. 2D-simulations using the EPOCH program indicate that the strong enhancement of THz for the Al target is due to the increased number of energetic electrons from the interaction between the main laser and the ablated plasma. However, for the plastic targets, the intensity of THz radiation was almost vanished in the case of ablation, but the accelerated protons still existed and the cutoff energy even tended to increase. However, due to the lack of ability to simulate the molecular structure, we cannot distinguish between Al and plastic targets in the simulation. The mechanism of radiation suppression by ablation of the plastic target needs further investigation.

COA of Formula: C5H8O2. Welcome to talk about 80-59-1, If you have any questions, you can contact Geng, YX; Li, DY; Zhang, SY; Wu, MJ; Yang, T; Wang, D; Yan, LX; Zhu, JG; Hu, XY; Zhao, YY; Yan, XQ; Lin, C or send Email.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Product Details of 80-59-1. Authors Tuniyazi, M; He, JY; Guo, J; Li, S; Zhang, NS; Hu, XY; Fu, YH in BMC published article about in [Tuniyazi, Maimaiti; He, Junying; Guo, Jian; Li, Shuang; Zhang, Naisheng; Hu, Xiaoyu; Fu, Yunhe] Jilin Univ, Dept Clin Vet Med, Coll Vet Med, Changchun 130062, Jilin, Peoples R China in 2021, Cited 42. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1

BackgroundLaminitis is a common and serve disease which caused by inflammation and pathological changes of the laminar junction. However, the pathologic mechanism remains unclear. In this study we aimed to investigate changes of the gut microbiota and metabolomics in oligofructose-induced laminitis of horses.ResultsAnimals submitted to treatment with oligofructose had lower fecal pH but higher lactic acid, histamine, and Lipopolysaccharide (LPS) in serum. Meanwhile, oligofructose altered composition of the hindgut bacterial community, demonstrated by increasing relative abundance of Lactobacillus and Megasphaera. In addition, the metabolome analysis revealed that treatment with oligofructose decreased 84 metabolites while 53 metabolites increased, such as dihydrothymine, N3,N4-Dimethyl-L-arginine, 10E,12Z-Octadecadienoic acid, and asparagine. Pathway analysis revealed that aldosterone synthesis and secretion, regulation of lipolysis in adipocytes, steroid hormone biosynthesis, pyrimidine metabolism, biosynthesis of unsaturated fatty acids, and galactose metabolism were significantly different between healthy and laminitis horses. Furthermore, correlation analysis between gut microbiota and metabolites indicated that Lactobacillus and/or Megasphaera were positively associated with the dihydrothymine, N3,N4-Dimethyl-L-arginine, 10E,12Z-Octadecadienoic acid, and asparagine.ConclusionsThese results revealed that disturbance of gut microbiota and changes of metabolites were occurred during the development of equine laminitis, and these results may provide novel insights to detect biomarkers for a better understanding of the potential mechanism and prevention strategies for laminitis in horses.

Welcome to talk about 80-59-1, If you have any questions, you can contact Tuniyazi, M; He, JY; Guo, J; Li, S; Zhang, NS; Hu, XY; Fu, YH or send Email.. Product Details of 80-59-1

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Futaki, E; Takeda, N; Yasui, M; Shinada, T; Miyata, O; Ueda, M in [Futaki, Erika; Takeda, Norihiko; Yasui, Motohiro; Miyata, Okiko; Ueda, Masafumi] Kobe Pharmaceut Univ, Higashinada Ku, Kobe, Hyogo 6588558, Japan; [Shinada, Tetsuro; Miyata, Okiko] Osaka City Univ, Grad Sch Sci, Sumiyoshi Ku, Osaka 5588585, Japan published gamma-C (sp(3))-H bond functionalisation of alpha,beta-unsaturated amides through an umpolung strategy in 2020, Cited 52. HPLC of Formula: C5H8O2. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1.

The nucleophilic gamma-phenylation and gamma-alkylation of alpha,beta-unsaturated amides have been developed. This umpolung reaction allows the regioselective introduction of phenyl and alkyl groups to a vinylketene N,O-acetal, which is generated in situ from an alpha,beta-unsaturated N-alkoxyamide, followed by N-O bond cleavage in a two-step, one-pot process.

HPLC of Formula: C5H8O2. Bye, fridends, I hope you can learn more about C5H8O2, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

An article Electrochemical TEMPO-catalyzed multicomponent C(sp(3))-H alpha-carbamoylation of free cyclic secondary amines WOS:000496489100014 published article about OXIDATIVE UGI-TYPE; ANODIC CYANATION; DIRECT FUNCTIONALIZATION; TERTIARY-AMINES; BOND FORMATION; ELECTROSYNTHESIS; STRATEGIES; ARYLATION; NITRILES in [Pan, Na; Zapata, Ramiro; Pulicani, Jean-Pierre; Grimaud, Laurence] Sorbonne Univ, Ecole Normale Super, Lab Biomol, CNRS, 24 Rue Lhomond, F-75005 Paris, France; [Pan, Na] East China Normal Univ, SCME, Shanghai Engn Res Ctr Mol Therapeut & New Drug De, 3663 Zhongshanbei Rd, Shanghai 200062, Peoples R China; [Ling, Johanne; Vitale, Maxime R.] PSL Univ Paris, Chim ParisTech, CNRS, Inst Chem Hlth & Life Sci, 11 Rue Pierre & Marie Curie, F-75005 Paris, France in 2019, Cited 50. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1. Formula: C5H8O2

We report here an original electrosynthetic method allowing the straightforward C(sp(3))-H alpha-carbamoylation of free cyclic secondary amines. Based on a TEMPO-catalyzed indirect anodic oxidation and a multicomponent coupling, a wide variety of N-acyl alpha-carboxamides have been obtained under remarkably mild and sustainable reaction conditions.

Welcome to talk about 80-59-1, If you have any questions, you can contact Pan, N; Ling, J; Zapata, R; Pulicani, JP; Grimaud, L; Vitale, MR or send Email.. Formula: C5H8O2

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

In 2020 ANAL BIOANAL CHEM published article about HEAVY-METALS; WATER; METABOLITES; PHARMACEUTICALS; IDENTIFICATION; TRANSFORMATION; PESTICIDES; TOXICITY; PRODUCTS; SUPPORT in [Diarnanti, Konstantina S.; Alygizakis, Nikiforos A.; Nika, Maria-Christina; Thomaidis, Nikolaos S.] Natl & Kapodistrian Univ Athens, Dept Chem, Lab Analyt Chem, Athens 15771, Greece; [Alygizakis, Nikiforos A.; Oswaldova, Martina; Oswald, Peter; Slobodnik, Jaroslav] Environm Inst, Okruzna 784-42, Kos 97241, Slovakia in 2020, Cited 41. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1. Formula: C5H8O2

The quality of the Dniester River Basin has been seriously impacted by the chemicals released by agriculture, industry, and wastewater discharges. To assess its current chemical pollution status, a transboundary monitoring campaign was conducted in May 2019. Thirteen surface water, 13 sediment, and three biota samples were collected and analyzed using generic sample preparation methods for the determination of organic substances by liquid chromatography high-resolution mass spectrometry (LC-HRMS) and metals by inductively coupled plasma mass spectrometry (ICP-MS). Wide-scope target and suspect screening resulted in detection of Water Framework Directive (WFD) priority substances and emerging contaminants, whereas the raw data were stored in NORMAN Digital Sample Freezing Platform (DSFP) for future retrospective screening. Furthermore, risk assessment was performed to prioritize detected substances and propose a draft list of river basin-specific pollutants. All studied metals (As, Hg, Zn, Cu, Cr, Cd, Pb, Ni) were detected in the surface water and sediments. In total, 139 organic contaminants belonging to various chemical classes (pesticides, pharmaceuticals, drugs of abuse, stimulants, sweeteners, industrial chemicals, and their transformation products) were detected. The highest cumulative concentration of contaminants was observed in surface water from the Byk River, a tributary of the Dniester (Moldova). Concentrations of WFD priority substances diuron and mercury and EU Watch List neonicotinoid compounds imidacloprid and thiamethoxam exceeded their environmental quality standards (EQS), whereas concentrations of 23 emerging substances exceeded their predicted no-effect concentration (PNEC) at minimum one site. Emerging contaminants telmisartan, metolachlor, terbuthylazine, and 4-acetamidoantipyrine were prioritized as potential river basin-specific pollutants. Graphical abstract

Formula: C5H8O2. About (E)-2-Methylbut-2-enoic acid, If you have any questions, you can contact Diarnanti, KS; Alygizakis, NA; Nika, MC; Oswaldova, M; Oswald, P; Thomaidis, NS; Slobodnik, J or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Recently I am researching about UNSATURATED CARBOXYLIC-ACIDS; ASYMMETRIC HYDROGENATION; ENANTIOSELECTIVE HYDROGENATION; SELECTIVE REDUCTION; HYDROBORATION; COMPLEXES; ESTERS; BOND, Saw an article supported by the . Formula: C5H8O2. Published in WILEY-V C H VERLAG GMBH in WEINHEIM ,Authors: Reed, JH; Cramer, N. The CAS is 80-59-1. Through research, I have a further understanding and discovery of (E)-2-Methylbut-2-enoic acid

The potent nucleophilicity and remarkably low basicity of 1,3,2-diazaphospholenes (DAPs) is exploited in a catalytic, metal-free 1,4-reduction of free alpha,beta-unsaturated carboxylic acids. Notably, the reduction occurs without a prior deprotonation of the carboxylic acid moiety and hence does not consume an additional hydride equivalent. This highlights the excellent nucleophilic character and low basicity of DAP-hydrides. Functional groups such as Cbz group or alkyl halides which can be problematic with classical transition-metal catalysts are well tolerated in the DAP-catalyzed process. Moreover, the transformation is characterized by a low catalyst loading, mild reaction conditions at ambient temperature as well as fast reaction times and high yields. The proof-of-principle for a catalytic enantioselective version is described.

Formula: C5H8O2. Welcome to talk about 80-59-1, If you have any questions, you can contact Reed, JH; Cramer, N or send Email.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles