Tag: 100-200

Regioselective metalation reactions of some substituted (methoxymethoxy)arenes was written by Winkle, Mark R.;Ronald, Robert C.. And the article was included in Journal of Organic Chemistry in 1982.Recommanded Product: Methyl 2-methoxy-4-methylbenzoate This article mentions the following:

The methoxymethoxy substituent acts as a relatively strong ortho-directing group in hydrogen-metal exchange reactions. E.g., metalation of 3-(methoxymethoxy)pyridine with Me₃CLi in Et₂O at -78° occurred almost exclusively at C-4. In conjunction with weak ortho-directing groups, the metalation ortho to the methoxymethoxy group can be directed by either of the ortho positions by controlling the electron-donating capacity of the metalating solvent. In strongly donating solvents the 1,2,4-substitution pattern will arise from a meta-substituted methoxymethoxy arene, while in nondonating solvents the 1,2,3-substitution is favored. In addition, the methoxymethoxy group serves also to enhance the rate of metalation and to stabilize the aryl-metalated products so that some competing addition reactions are suppressed. In the experiment, the researchers used many compounds, for example, Methyl 2-methoxy-4-methylbenzoate (cas: 81245-24-1Recommanded Product: Methyl 2-methoxy-4-methylbenzoate).

Methyl 2-methoxy-4-methylbenzoate (cas: 81245-24-1) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Recommanded Product: Methyl 2-methoxy-4-methylbenzoate

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

New activators of eIF2α Kinase Heme-Regulated Inhibitor (HRI) with improved biophysical properties was written by Zhang, Qingwen;Du, Ronghui;Reis Monteiro dos Santos, Guilherme Rodrigo;Yefidoff-Freedman, Revital;Bohm, Andrew;Halperin, Jose;Chorev, Michael;Aktas, Bertal H.. And the article was included in European Journal of Medicinal Chemistry in 2020.Synthetic Route of C8H4N2O This article mentions the following:

Heme-regulated inhibitor (HRI), a eukaryotic translation initiation factor 2 alpha (eIF2α) kinase, is critically important for coupling protein synthesis to heme availability in reticulocytes and adaptation to various environmental stressors in all cells. HRI modifies the severity of several Hb misfolding disorders including β-thalassemia. Small mol. activators of HRI are essential for studying normal- and patho-biol. of this kinase as well as for the treatment of various human disorders for which activation of HRI or phosphorylation of eIF2α may be beneficial. We previously reported development of 1-((1,4-trans)-4-aryloxycyclohexyl)-3-arylureas (cHAUs) as specific HRI activators and demonstrated their potential as mol. probes for studying HRI biol. and as lead compounds for treatment of various human disorders. To develop more druglike cHAUs for in vivo studies and drug development and to expand the chem. space, we undertook bioassay guided structure-activity relationship studies replacing cyclohexyl ring with various 4-6-membered rings and explored further substitutions on the N-Ph ring. We tested all analogs in the surrogate eIF2α phosphorylation and cell proliferation assays, and a subset of analogs in secondary mechanistic assays that included endogenous eIF2α phosphorylation and expression of C/EBP homologous protein (CHOP), a downstream effector. Finally, we determined specificity of these compounds for HRI by testing their anti-proliferative activity in cells transfected with siRNA targeting HRI or mock. These compounds have significantly improved cLogPs with no loss of potencies, making them excellent candidates for lead optimization for development of investigational new drugs that potently and specifically activate HRI. In the experiment, the researchers used many compounds, for example, 3-Cyanophenylisocyanate (cas: 16413-26-6Synthetic Route of C8H4N2O).

3-Cyanophenylisocyanate (cas: 16413-26-6) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Synthetic Route of C8H4N2O

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

DNA base pair specific ligands. II. Proton NMR spectroscopic studies of distamycin A chromophore stereochemistry was written by Turchin, K. F.;Grokhovskii, S. L.;Zhuze, A. L.;Gottikh, B. P.. And the article was included in Bioorganicheskaya Khimiya in 1978.Name: Ethyl 4-nitro-1H-pyrrole-2-carboxylate This article mentions the following:

Several compounds containing 1,2 and 3 pyrrole rings linked by amide or methylamide bonds at position 2 or 4, e.g., I (R¹ = H, R² = OEt, NH₂, NHMe; R³ = NO₂), II (R¹ = H, R² = OEt, NHCH₂CH₂CN; R³ = H, Me; R⁴ = NO₂), and III (R¹ = H, Me; R² = OEt, OH), were prepared and investigated by proton NMR to study the stereochem. of the chromophore moiety of the antiviral antibiotic distamycin A (IV). The preferable conformation of C₂C₃ and CO bonds was trans relative to the C₂CO bond. The preferable conformation of C₂CO and NHC₄ is trans relative to the CONH bond. The preferable conformation of the NHCO and C₄C₅ bonds was cis relative to the NHC₄ bond. In the experiment, the researchers used many compounds, for example, Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7Name: Ethyl 4-nitro-1H-pyrrole-2-carboxylate).

Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Name: Ethyl 4-nitro-1H-pyrrole-2-carboxylate

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

High Performance Liquid Chromatography-Quadrupole Time-of-Flight Mass Spectrometry Based Metabolomic Detection of Non-Volatile Components of Different Chemotype of Cinnamomum camphora was written by Jinqiang Yang;Lin, Qin;Fan, Luyi;Yang, Nianyun. And the article was included in Journal of Analytical Chemistry in 2020.Application In Synthesis of Ethyl 2-hydroxybenzoate This article mentions the following:

A liquid chromatog.-quadrupole time-of-flight mass spectrometry (LC-QTOF/MS) based plant metabolomics approach was established to investigate the metabolic profiles of the Cinnamomum camphora leaves of four different areas. The LC-QTOF/MS data were subjected to principal component anal. (PCA) and orthogonal partial least squared discrimination anal. (OPLS-DA) to find the potential characteristic components of C. camphora leaves from the four areas in a quick way. C. camphora leaves from different areas could be separated into four different groups chem. according to the PCA scores. The chem. constituents in C. camphora leaves from four areas were obviously different. The potential markers were identified by comparison with the reference compounds or were tentatively assigned by matching the retention time, empirical mol. formula and fragment ions with those of the published compounds of C. camphora leaves. The proposed anal. method is fast, accurate and reliable for differentiating C. camphora leaves from different areas. Moreover, this study supplied a new method for the quality evaluation of other medicinal materials. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6Application In Synthesis of Ethyl 2-hydroxybenzoate).

Ethyl 2-hydroxybenzoate (cas: 118-61-6) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Application In Synthesis of Ethyl 2-hydroxybenzoate

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

Synthesis, characterization and antimicrobial activity of azetidine derivatives was written by Choudhary, Shweta;Dubey, Archana;Chaturvedi, Prerna;Birle, Rekha. And the article was included in International Journal of Pharmacy and Life Sciences in 2021.Recommanded Product: Ethyl 2-hydroxybenzoate This article mentions the following:

In present study azetidine derivatives were synthesized and microbial activity of different derivatives were checked with various microbial stain. Various intermediates was synthesized and characterized in between time to time by chromatog. and special methods. Substituted salicylic acid and sulfuric acid were starting material and finally formed2-Hydroxy -N-2-oxa-4-phenylazet-1(2H)0ylbenzamide(D), while in the intermediate steps(A) Ethylsalicylate react with hydrazine hydrate to get,(B) Salicyl Hydrazide, and this (B) compound reflux with sulfuric acid to get (C) 2 -hydroxy-N-[(Z)- phenylmethylidene]benzohydrazide. Azetidine derivatives have been synthesized from Schiff base of the corresponding hydrazine by using ethanol with reflex. The structure of the entire synthesized compound was established on the basis of element, chromatog. and spectral anal. The synthesized compound was evaluated for their antimicrobial activity. Most active be against Staphylococcus. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6Recommanded Product: Ethyl 2-hydroxybenzoate).

Ethyl 2-hydroxybenzoate (cas: 118-61-6) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Recommanded Product: Ethyl 2-hydroxybenzoate

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

Sensory and chemical characterization of Chinese bog bilberry wines using Check-all-that-apply method and GC-Quadrupole-MS and GC-Orbitrap-MS analyses was written by Lin, Yanxin;Liu, Yaran;Liu, Shuxun;Kortesniemi, Maaria;Liu, Jiani;Zhu, Baoqing;Laaksonen, Oskar. And the article was included in Food Research International in 2022.Product Details of 118-61-6 This article mentions the following:

The sensory and chem. profiles of com. bog bilberry (BB) wines were investigated using a multi-anal. approach. Sensory test included scaling and check-all-that-apply (CATA) method with questions on liking of BB wine. The sensory data was correlated with their volatile compound profiles determined using gas chromatog. coupled with quadrupole and orbitrap mass spectrometry (GC-Quadrupole/Orbitrap-MS). In general, all BB wines were characterized with “fruity”, “blueberry” and “floral” odors and “sour”, “mouth puckering” and “sweet” flavors. Samples more frequently characterized as “fruity” and “floral” in CATA were preferred by the panelists (n = 93). High relative proportions of o-cymene, p-cymenene, 1-octen-3-one and 3-ethylphenol in a sample (described as “ginger” and “chili”) resulted in a lower liking rating. Similarly, generally disliked sample described with “Chinese herbs” and “licorice” was characterized by compounds 3-methylpentan-1-ol, 1,1,6-trimethyl-1,2-dihydronaphthalene, and 4-vinylphenol. The data will give novel information for berry wine and beverage industry on the quality factors of BB wines linked to higher acceptance. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6Product Details of 118-61-6).

Ethyl 2-hydroxybenzoate (cas: 118-61-6) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Product Details of 118-61-6

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

Practical azidation of 1,3-dicarbonyls was written by Harschneck, Tobias;Hummel, Sara;Kirsch, Stefan F.;Klahn, Philipp. And the article was included in Chemistry – A European Journal in 2012.Related Products of 13669-10-8 This article mentions the following:

An operationally simple, direct azidation of 1,3-dicarbonyl compounds has been developed. The reaction proceeds readily under ambient conditions using sodium azide and an iodine-based oxidant such as I₂ or 2-iodoxybenzoic acid (IBX)-SO₃K/NaI. In particular, the latter method, as a new and well-balanced oxidizing agent, shows excellent functional group tolerance and substrate scope and thus allows access to a variety of tertiary 2-azido and 2,2-bisazido 1,3-dicarbonyl compounds that would be more difficult to access by using traditional methods. Because the azide-containing products easily undergo 1,3-dipolar cycloaddition with alkynes, our report represents a novel route to analogs of sensitive complex mols. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8Related Products of 13669-10-8).

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Related Products of 13669-10-8

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

Improved synthesis of 6-[(ethylthio)methyl]-1H-indazole was written by Sirven, Agnes M.;Stefak, Roman;Rapenne, Gwenael. And the article was included in Heterocyclic Communications in 2015.Related Products of 41191-92-8 This article mentions the following:

In the improved synthesis of 6-[(ethylthio)methyl]-1H-indazole, the 1H-indazol-6-ylmethyl methanesulfonate intermediate is replaced by the 6-bromomethyl-1H-indazole, which increases the overall yield (six steps) by a factor of (1H-indazol-6-yl)-methanol. In the experiment, the researchers used many compounds, for example, Ethyl 3-amino-4-methylbenzoate (cas: 41191-92-8Related Products of 41191-92-8).

Ethyl 3-amino-4-methylbenzoate (cas: 41191-92-8) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Related Products of 41191-92-8

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

Identification of aroma compounds in a commonly prescribed oral nutritional supplement and associated changes in olfactory abilities with human ageing was written by Lester, Sophie;Cornacchia, Leonardo;Corbier, Camille;Taylor, Moira A.;Ayed, Charfedinne;Yang, Ni;Lim, Mui;Linforth, Rob;Fisk, Ian. And the article was included in Scientific Reports in 2021.COA of Formula: C10H20O2 This article mentions the following:

Undernutrition is prevalent in the older adult population. Oral nutritional supplements (ONS) are a clin. effective nutritional intervention, however, patient acceptance of ONS can be limited by their palatability. While sensory attributes such as sweetness and mouthfeel have been investigated, the contribution made by aroma to the perceived flavor of ONS has not been studied. Firstly, this research aimed to identify the aroma active compounds within a commonly prescribed ONS using estimated odor activity values (OAV) and gas chromatog. olfactometry mass spectrometry (GC-O-MS). Secondly, age related differences in olfactory detection were explored. Eight aroma active compounds were identified within the ONS, including diacetyl (sweet), isoamyl acetate (banana), di-Me trisulfide (sulfur) and methanethiol (sulfur). When compared with younger adults (n = 24, 18-44 years), older adults (n = 24, 62-80 years) had higher detection thresholds for all aroma compounds and this was significant for isoamyl acetate (sweet, fruity) and methanethiol (sulfur) (p = 0.01 and p = 0.03, resp.). Thus, a decline in olfactory sensitivity was present in the older subjects included in the study, and this reduced detection sensitivity was aroma specific. Thus, older adults flavor perception of ONS likely depends on the combined effect of product factors (the aroma profile) along with age related consumer factors (the degree of impairment in perception). This is a fundamental study which will aid future research into how the aroma profile, and associated age related impairments in perception, shape the global perception of ONS for nutritionally at risk older individuals. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1COA of Formula: C10H20O2).

Isopentyl 3-methylbutanoate (cas: 659-70-1) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.COA of Formula: C10H20O2

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

Design of volatile organic compounds profiles of roasted Coffea arabica extracts produced by supercritical and conventional solvents was written by de Toledo, Paulo R. A. B.;de Melo, Marcelo M. R.;Rodrigues, Vitor H.;Pezza, Helena R.;Rocha, Silvia M.;Toci, Aline T.;Pezza, Leonardo;Portugal, Ines;Silva, Carlos M.. And the article was included in International Journal of Food Science and Technology in 2022.Safety of 5-Ethyldihydrofuran-2(3H)-one This article mentions the following:

This work addresses the potential of supercritical fluid extraction (SFE) to design volatile organic compounds (VOCs) profiles using roasted Coffea arabica. On the whole, 57 VOCs were identified by HS-SPME/GC-MS. A full factorial design was adopted to study the effect of pressure (180 and 300 bar), temperature (40 and 80°C) and ethanol content (0 and 5 weight%). The total extraction yield ranged from 1.4 weight% to 9.8 weight%. At 180 bar and 80°C, two extracts exhibited VOCs amount up to 3.5 times higher than the dichloromethane extract Temperature and pressure favored VOCs amount and total yield in conflicting ways, and ethanol had a negligible effect on VOCs amount At 180 bar and 80°C, the VOCs profile revealed a reinforcement of pyrroles, phenols, cyclopentenes and pyrans, at the expense of pyridines, carboxylic acids and furans. Hence, this essay evidences the potential of SFE to engineer coffee VOCs profiles. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Safety of 5-Ethyldihydrofuran-2(3H)-one).

5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Safety of 5-Ethyldihydrofuran-2(3H)-one

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