Tag: 100-200

Efficient Method for the Synthesis of Benzimidazoquinazoline Derivatives with Three-Point Diversity was written by Saha, Biswajit;Sharma, Sunil;Kundu, Bijoy. And the article was included in Synthetic Communications in 2007.SDS of cas: 2740-88-7 This article mentions the following:

An efficient strategy for the preparation of a novel heterocyclic ring system of benzimidazoquinazolines with three-point diversity has been described. The compounds were obtained by treating o-phenylenediamine derivatives with o-nitrobenzaldehyde to give benzimidazole derivatives, followed by reduction of the nitro group to give an amine. Derivatization of the resulting amine with isothiocyanates followed by in situ cyclodesulfurization at rt furnished the title compounds in high yields and purity. In the experiment, the researchers used many compounds, for example, 4-Fluorobenzylisothiocyanate (cas: 2740-88-7SDS of cas: 2740-88-7).

4-Fluorobenzylisothiocyanate (cas: 2740-88-7) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.SDS of cas: 2740-88-7

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

Ruthenium Carbene-Mediated Construction of Strained Allenes via the Enyne Cross-Metathesis/Cyclopropanation of 1,6-Enynes was written by Gao, Ming;Gao, Qiangqiang;Hao, Xiangbin;Wu, Ying;Zhang, Qingmin;Liu, Guohua;Liu, Rui. And the article was included in Organic Letters in 2020.Synthetic Route of C10H14O4 This article mentions the following:

Herein, we report on the unprecedented dimerization of 1,6-enynes using a com. available ruthenium complex RuCl₂(PPh₃)₃, which results in a series of bicyclo[3.1.0]hexyl allene derivatives in moderate to excellent yields. Mechanistic investigation indicates that the in-situ-generated ruthenium vinylidene undergoes a site-selective metathesis process to provide allenyl ruthenium carbene, which can be intramolecularly trapped by the pendent C=C bond of enyne through a [2+2]-cycloaddition/metal elimination process. In the experiment, the researchers used many compounds, for example, Diethyl 2-(prop-2-yn-1-yl)malonate (cas: 17920-23-9Synthetic Route of C10H14O4).

Diethyl 2-(prop-2-yn-1-yl)malonate (cas: 17920-23-9) 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. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Synthetic Route of C10H14O4

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

Characteristic scent from the Tahitian liverwort, Cyathodium foetidissimum was written by Sakurai, Kazutoshi;Tomiyama, Kenichi;Kawakami, Yukihiro;Yaguchi, Yoshihiro;Asakawa, Yoshinori. And the article was included in Journal of Oleo Science in 2018.Electric Literature of C10H20O2 This article mentions the following:

The volatile components of the Tahitian liverwort Cyathodium foetidissimum was analyzed using headspace solid phase micro-extraction (SPME) and GC-MS. Three volatile components, 4-methoxystyrene (24.4%), 3,4-dimethoxystyrene (28.7%), and skatole (15.9%) were identified as the major components from the fresh C. foetidissimum, along with several aliphatic aldehydes, n-octanal, n-nonanal, and n-decanal. However, (E)-2-nonenal recognized as aged malodor was not identified. In GC-O anal., 2-aminoacetophenone was detected as one of the minor components with a strong aging note. In fact, C. foetidissimum showed the characteristic aging odor reminiscent the damp smell from old chest of drawers, or the civet like note with very strong feces and urine odor. The mixture consisted of 4-methoxystyrene, 3,4-dimethoxystyrene, and skatole in the detected ratio showed the sedative effect on CNV (contingent neg. variation) measurement. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Electric Literature of C10H20O2).

Isopentyl 3-methylbutanoate (cas: 659-70-1) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Electric Literature of C10H20O2

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

Identification of Cytotoxic Flavor Chemicals in Top-Selling Electronic Cigarette Refill Fluids was written by Hua, My;Omaiye, Esther E.;Luo, Wentai;McWhirter, Kevin J.;Pankow, James F.;Talbot, Prue. And the article was included in Scientific Reports in 2019.HPLC of Formula: 659-70-1 This article mentions the following:

We identified the most popular electronic cigarette (EC) refill fluids using an Internet survey and local and online sales information, quantified their flavor chems., and evaluated cytotoxicities of the fluids and flavor chems. “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 chems. were identified and quantified by gas chromatog.-mass spectrometry. Total flavor chem. 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 chems.; each refill fluid contained 22 to 47 flavor chems., most being esters. Some chems. 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 chems. 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 chems. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1HPLC of Formula: 659-70-1).

Isopentyl 3-methylbutanoate (cas: 659-70-1) 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. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.HPLC of Formula: 659-70-1

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

DDQ-Catalyzed Direct C(sp³)-H Amination of Alkylheteroarenes: Synthesis of Biheteroarenes under Aerobic and Metal-Free Conditions was written by Song, Chunlan;Dong, Xin;Yi, Hong;Chiang, Chien-Wei;Lei, Aiwen. And the article was included in ACS Catalysis in 2018.Recommanded Product: Methyl 2-thienylacetate This article mentions the following:

A strategy for oxidative Csp³-H/N-H cross-coupling is presented. This reaction successfully utilizes 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) and tert-Bu nitrite (TBN) as co-catalysts to construct the biomedical applicable biheteroarenes under aerobic conditions. Notably, this amination reaction is successful with a wide range of alkylheteroarenes and could be used as a functionalization tactic for pharmaceutical research and other areas. Furthermore, preliminary mechanistic studies indicate that the C-N bond formation proceeds through the nucleophilic attack of azole to the carbon cation. In the experiment, the researchers used many compounds, for example, Methyl 2-thienylacetate (cas: 19432-68-9Recommanded Product: Methyl 2-thienylacetate).

Methyl 2-thienylacetate (cas: 19432-68-9) 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. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Recommanded Product: Methyl 2-thienylacetate

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

Chemical Composition and Antioxidant Activity of Thymus ciliatus (Desf.) Benth. Essential Oils of Algeria was written by Souadia, Ahmed. And the article was included in Natural Product Communications in 2022.Safety of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate This article mentions the following:

The aim of this work was to study the chem. composition and antioxidant activity of essential oils of Thymus ciliatus (Desf.) Benth from middle Algeria obtained from the aerial parts by hydrodistillation using a Clevenger-type apparatus The oil was analyzed by gas chromatog. (GC) and gas chromatog. coupled with mass spectrometry (GC-MS). The antioxidant capacity values of T ciliatus extracts were determined using 2 different and complementary assays: free radical scavenging (2,2-diphenyl-1-picrylhydrazyl [DPPH]) and ferric reducing antioxidant power (FRAP) assays. Six samples of T ciliatus collected in 2019 were used in the study. GC and GC-MS were used to determine the chem. composition of the essential oils. Twenty-five compounds were identified with a percentage of 89.3%-97.7%. The essential oils of T ciliatus were characterized by the presence of myrcene (9.6%-26.9%), p-cymene (7.6%-17.0%), and borneol (13.4%-30.2%) as principal components. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Safety of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate).

(E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3) 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. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Safety of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate

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

Oxovanadium(V) and Dioxomolybdenum(VI) Complexes of Amide-Imine Conjugates: Structures, Catalytic and Antitumor Activities was written by Ta, Sabyasachi;Ghosh, Milan;Salam, Noor;Ghosh, Subhasis;Brandao, Paula;Felix, Vitor;Hira, Sumit Kumar;Manna, Partha Pratim;Das, Debasis. And the article was included in ACS Applied Bio Materials in 2019.Computed Properties of C9H10O3 This article mentions the following:

Three new amide-imine conjugates, [(E)-2-hydroxy-N’-((2-hydroxynaphthalen-1-yl)methylene)benzohydrazide] (SALNP), [(E)-N’-(4-(diethylamino)-2-hydroxybenzylidene)-2-hydroxybenzohydrazide](SALSD),and [(E)-N’-(3-ethoxy-4-hydroxybenzylidene)-2-hydroxybenzohydrazide] (SALVN), derived by reacting 2-hydroxybenzohydrazide (SAL) with three different aldehyde, 2-hydroxynaphthaldehyde, 4-(diethylamino)-2-hydroxybenzaldehyde, and 3-ethoxy-4-hydroxybenzaldehyde, resp. Three mononuclear oxovanadium(V) and two μ_oxo-bridged dinuclear molybdenum(VI) complexes were synthesized using SALNP and SALSD. Besides, SALVN was used to prepare oxovanadium(V) and dioxomolybdenum(VI) complexes. All five metal complexes along with three amide-imine conjugates were characterized by single crystal XRD anal. Some of them were explored as catalyst for oxidation of alkyl benzene and styrene. Antitumor activities of the metal complexes along with ligands were studied on Dalton lymphoma (DL) and 2PK3 murine lymphoma cells. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6Computed Properties of C9H10O3).

Ethyl 2-hydroxybenzoate (cas: 118-61-6) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. 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.Computed Properties of C9H10O3

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

Comparison of two methods for the collection of volatiles from three legumes was written by Bai, Ze-zhen;Yang, Mei-hong;Zhao, Xiang. And the article was included in Caoyuan Yu Caoping in 2021.Related Products of 695-06-7 This article mentions the following:

Volatiles from three legume species, Medicago ruthenica, black soybean and Glycine soja, were extracted by dynamic headspace extraction and solid-phase microextraction (SPME) to investigate the effects of extraction method on the volatile components. Gas chromatog.-mass spectrometry was used to analyze and identify the main components of volatiles. The results showed that the volatile components (mainly alcs., aldehydes, acids, esters, ketones, terpenes and hydrocarbons) extracted by dynamic headspace extraction were different from those by SPME. There were 33, 18 and 16 components of volatiles extracted by dynamic headspace extraction in M. ruthenica, black soybean and Glycine soja, resp., while the corresponding values extracted by SPME were 24, 24 and 22. Some common chems. were extracted using those two different methods, for example, six chems. (including leaf alc., trans-hex-3-en-1-ol, (E)-β-ocimene, 4-ethylbenzaldehyde, cis-3-hexenyl acetate, hexadecane) in M. ruthenica; three chems. (4-ethylbenzaldehyde, cis-3-hexenyl acetate and cyclohexane) in black soybean; and 4 chems. (4-ethylbenzaldehyde, cis-3-hexenyl acetate, oct-1-en-3-ol and 3-octanol) in Glycine soja. The chems., cis-3-hexenyl acetate and 4-ethylpropiophenone were detected in all those three legume species. The main volatile components extracted by dynamic headspace anal. were esters, while the main components extracted by SPME were alcs. As the dynamic headspace anal. could reflect the near-natural state of plants, it is recommended for the collection of volatiles from plants. This study identified the volatile components of three legume species, which could provide reference for further screening of volatile components in legumes that have attracting activity to insects. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Related Products of 695-06-7).

5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7) 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. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Related Products of 695-06-7

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

Dancing performance of organic droplets in aqueous surfactant solutions was written by Cejkova, Jitka;Schwarzenberger, Karin;Eckert, Kerstin;Tanaka, Shinpei. And the article was included in Colloids and Surfaces, A: Physicochemical and Engineering Aspects in 2019.Recommanded Product: Ethyl 2-hydroxybenzoate This article mentions the following:

Droplet systems remain the subject of a constant fascination in science and technol. Here we focus on organic droplets floating on the surface of aqueous surfactant solutions These droplets can exhibit intriguing interactions. Recently we have found independently in two laboratories that we can observe almost the same complex collective behavior in two different droplet systems. The aim of this paper is to compare both droplets systems, present their differences and show their similar oscillatory behavior. The first system consists of decanol droplets floating on a sodium decanoate solution In the second one, the droplets consist of a mixture of Et salicylate and liquid paraffin and they are placed on the surface of an aqueous sodium dodecyl sulfate solution Although the mechanism of these spatio-temporal interactions of droplets is not fully understood yet, we believe that this behavior is based on the same phenomena. 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. 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.Recommanded Product: Ethyl 2-hydroxybenzoate

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

Effect of Spanish-style processing steps and inoculation with Lactobacillus pentosus starter culture on the volatile composition of cv. Manzanilla green olives was written by de Castro, Antonio;Sanchez, Antonio Higinio;Cortes-Delgado, Amparo;Lopez-Lopez, Antonio;Montano, Alfredo. And the article was included in Food Chemistry in 2019.Category: esters-buliding-blocks This article mentions the following:

The effects of the main steps of Spanish-style processing (alk. treatment and fermentation) on the volatile composition of cv. Manzanilla green olives were studied. Both spontaneous and controlled fermentations were considered. In the latter case, a Lactobacillus pentosus strain from green olive fermentation brine was used as starter culture. The volatile profile was determined by headspace solid-phase microextraction (HS-SPME) combined with gas chromatog.-mass spectrometry (GC-MS). Most of the volatile compounds detected in fresh olives decreased or were undetected after alk. treatment, while several compounds (mostly acetic acid, 2-methylbutanoic acid, and ethanol) were formed as a result of this treatment. Over 50 new volatile components, mostly esters and phenols, appeared as a result of fermentation The most outstanding finding was a considerable increase in 4-Et phenol (almost 100-fold increase) in inoculated olives compared to the uninoculated product. However, a sensory panel did not find significant differences in odor perception. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6Category: esters-buliding-blocks).

Ethyl 2-hydroxybenzoate (cas: 118-61-6) 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 are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Category: esters-buliding-blocks

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