Tag: 200-300

Quantitative analysis of characteristic aromatic compounds in red berry (Myrica rubra Sieb. Et Zucc) by HS-SPME and GC/MS was written by Kang, Wenhuai;Xu, Yan;Fan, Wenlai;Jiang, Wenguang;Zhou, Zengqun;Zhu, Yongfeng. And the article was included in Shipin Gongye Keji in 2009.Related Products of 1190-39-2 This article mentions the following:

Red bayberry (Myrica rubra Sieb. et Zucc) was a subtropical fruit tree native to China Southern, and its mature berry was characterized by strong aromatic flavor. The investigation on flavor was very significant. In this research, the volatile characteristic flavor was investigated using the liquid-liquid extraction (LLE) and headspace-solid phase microextraction (HS-SPME) technique, and the gas chromatog. mass spectrometry (GC/MS). The results showed that there were 60 components identified by HS-SPME-GC/MS. The primary classification of volatile components was terpenoids (40%). The second category was alcs. (22%). The contents of acid and ester were lower, with 1% and 3% resp. It showed that the content of β-caryophyllene was highest (1069.8 μg/L) among them. The research on anal. of red bayberry characteristic flavor was significant theor. basis for improving construction of the quality evaluation system and for investigating effect of the deep processing technol. on the flavor. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Related Products of 1190-39-2).

malonic acid dibutyl ester (cas: 1190-39-2) 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. 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. Related Products of 1190-39-2

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

A new hypercrosslinked supermicroporous polymer, with scope for sulfonation, and its catalytic potential for the efficient synthesis of biodiesel at room temperature was written by Bhunia, Subhajit;Banerjee, Biplab;Bhaumik, Asim. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2015.Application of 106-79-6 This article mentions the following:

A new hypercrosslinked supermicroporous polymer (HMP-1) was designed with a BET surface area of 913 m² g^-1 by FeCl₃ via a catalyzed Friedel-Crafts alkylation reaction between carbazole and α,α’-dibromo-p-xylene. Upon sulfonation HMP-1 yielded a very efficient solid acid catalyst for the production of biodiesels via esterification/transesterification of free fatty acids (FFA)/esters at room temperature In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Application of 106-79-6).

Dimethyl decanedioate (cas: 106-79-6) 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. 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. Application of 106-79-6

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

Stereodivergent Synthesis of Tertiary Fluoride-Tethered Allenes via Copper and Palladium Dual Catalysis was written by Yang, Shao-Qian;Wang, Yi-Fan;Zhao, Wei-Cheng;Lin, Guo-Qiang;He, Zhi-Tao. And the article was included in Journal of the American Chemical Society in 2021.Formula: C13H15NO2 This article mentions the following:

Herein we describe a protocol for the unprecedented stereodivergent synthesis of tertiary fluoride-tethered allenes bearing a stereogenic center and stereogenic axis via Cu/Pd synergistic catalysis. A broad scope of conjugated enynes are coupled with various α-fluoroesters in high yields with high diastereoselectivities and generally >99% ee. In addition, the four stereoisomers of the allene products ensure precise access to the corresponding four stereoisomers of the fluorinated hydrofurans via a novel stereodivergent axial-to-central chirality transfer process. In the experiment, the researchers used many compounds, for example, tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3Formula: C13H15NO2).

tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3) 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. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Formula: C13H15NO2

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

C-H Activation-Based Traceless Synthesis via Electrophilic Removal of a Directing Group. Rhodium(III)-Catalyzed Entry into Indoles from N-Nitroso and α-Diazo-β-keto Compounds was written by Wang, Jie;Wang, Mingyang;Chen, Kehao;Zha, Shanke;Song, Chao;Zhu, Jin. And the article was included in Organic Letters in 2016.Recommanded Product: Ethyl 3-oxo-3-(m-tolyl)propanoate This article mentions the following:

A distinct C-H activation-based traceless synthetic protocol via electrophilic removal of a directing group is reported, complementing the currently exclusively used nucleophilic strategy. Rh(III)-catalyzed, N-nitroso-directed C-H activation allows the development of a traceless, atom- and step-economic, cascade approach for the synthesis of indole skeletons, starting from readily available N-nitroso and α-diazo-β-keto compounds Importantly, the cyclization/denitrosation reaction represents a hitherto unobserved reactivity pattern for the N-nitroso group. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Recommanded Product: Ethyl 3-oxo-3-(m-tolyl)propanoate).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) 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. 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 3-oxo-3-(m-tolyl)propanoate

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

Nickel-Catalyzed Benzylic Substitution of Benzyl Esters with Malonates as a Soft Carbon Nucleophile was written by Tsuji, Hiroaki;Hashimoto, Keisuke;Kawatsura, Motoi. And the article was included in Organic Letters in 2019.Product Details of 10203-58-4 This article mentions the following:

The nickel-catalyzed benzylic substitution of benzyl alc. derivatives with a soft carbon nucleophile is extremely rare compared to that with a hard carbon nucleophile. The nickel-catalyzed benzylic substitution of benzyl esters with malonates as a soft carbon nucleophile is achieved. Primary and secondary benzyl 2,3,4,5,6-pentafluorobenzoates as well as a wide variety of malonate derivatives were well tolerated in the nickel-catalyzed reaction, providing the corresponding alkylation products in 46-86% yields (34 examples). Addnl., a possible reaction mechanism that would underwent via the η¹– and η³-benzylnickel intermediates is proposed. In the experiment, the researchers used many compounds, for example, Diethyl isobutylmalonate (cas: 10203-58-4Product Details of 10203-58-4).

Diethyl isobutylmalonate (cas: 10203-58-4) 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. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Product Details of 10203-58-4

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

Cascade Wolff Rearrangement/Acylation: A Metal-Free and Eco-Friendly Approach for 4-Hydroxy-pyrazolo[3,4-b]pyridin-6-ones and N-Pyrazole Amides Synthesis from 5-Aminopyrazoles and α-Diazoketones was written by Zhang, Xiang-Jin;Zhang, Jie;Xu, Yu-Ning;Li, Yi-Ming;Chi, Man;Yan, Yu;Wu, Rui-Xue;Zhang, Hui-Ru;Zhu, Yan-Ping. And the article was included in Journal of Organic Chemistry in 2021.Name: Ethyl 3-oxo-3-(m-tolyl)propanoate This article mentions the following:

A highly chemoselective cascade Wolff rearrangement/acylation reaction between 5-aminopyrazoles and diazo compounds has been developed. The protocol can facilitate the switchable synthesis of 4-hydroxy-pyrazolo[3,4-b]pyridin-6-ones I (R¹ = Me, Et, Ph, etc.; R² = Ph, t-Bu, 2-naphthyl, etc.; R³ = Ph, 4-MeOC₆H₄, 3-thienyl, etc.) and N-pyrazole amides II (R¹ = Me, t-Bu, Ph; R² = Ph, 4-FC₆H₄, 2-naphthyl, etc.; R³ = Me, c-hexyl, Ph, etc.; R⁴ = Me, Et) with the merits of a broad substrate scope, high functional group compatibility, and green and sustainable performance manner. All reactions proceeded efficiently without any catalyst and additives (acid and base) and resulted in the release of benign N₂, wherein di-Et carbonate served as a green benign solvent. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Name: Ethyl 3-oxo-3-(m-tolyl)propanoate).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) 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. 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.Name: Ethyl 3-oxo-3-(m-tolyl)propanoate

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

Dithioesters: simple, tunable, cysteine-selective H₂S donors was written by Cerda, Matthew M.;Newton, Turner D.;Zhao, Yu;Collins, Brylee K.;Hendon, Christopher H.;Pluth, Michael D.. And the article was included in Chemical Science in 2019.Electric Literature of C14H12S2 This article mentions the following:

Dithioesters have a rich history in polymer chem. for RAFT polymerizations and are readily accessible through different synthetic methods. Here we demonstrate that the dithioester functional group is a tunable motif that releases H₂S upon reaction with cysteine and that structural and electronic modifications enable the rate of cysteine-mediated H₂S release to be modified. In addition, we use (bis)phenyl dithioester to carry out kinetic and mechanistic investigations, which demonstrate that the initial attack by cysteine is the rate-limiting step of the reaction. These insights are further supported by complementary DFT calculations We anticipate that the results from these investigations will allow for the further development of dithioesters as important chem. motifs for studying H₂S chem. biol. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Electric Literature of C14H12S2).

Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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. Electric Literature of C14H12S2

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

Direct and Efficient Synthesis of Sulfonium Acyl Sulfonylmethylide Ylides from Acetylenic Sulfones and Dimethyl Sulfoxide was written by Fu, Duo;Wang, Jiayi;Xu, Jiaxi. And the article was included in Synthesis in 2021.Computed Properties of C13H15NO2 This article mentions the following:

Bifunctionalized sulfonium ylides – sulfonium acyl sulfonylmethylides I (R¹ = Ph, 2-MeOC₆H₄, 1-naphthyl, etc.; R² = Me, 4-MeC₆H₄, 4-FC₆H₄, etc.) were directly and efficiently prepared from various acetylenic sulfones and aliphatic sulfoxides under heating conditions. The current method features short reaction time, low cost, readily available starting materials, convenient operation, and purification, providing an efficient access to widely applied bifunctionalized sulfonium ylides. In the experiment, the researchers used many compounds, for example, tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3Computed Properties of C13H15NO2).

tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3) 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. 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.Computed Properties of C13H15NO2

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

Photocurable selenophene/maleimide-based high-refractive-index copolymers obtained via radical copolymerization was written by Tokushita, Yoshihisa;Watanabe, Airi;Torii, Ayaka;Nakabayashi, Kazuhiro;Samitsu, Sadaki;Mori, Hideharu. And the article was included in Reactive & Functional Polymers in 2021.Electric Literature of C14H12S2 This article mentions the following:

Selenophene-containing copolymers with either alternating or random sequences and high refractive indexes were synthesized via conventional free-radical copolymerization of 2-vinylselenophene (2VS). Copolymers with a moderate alternating tendency were obtained via radical copolymerization of electron-donating 2VS and electron-accepting maleimide derivatives, such as N-Me maleimide (MMI), N-Ph maleimide (PMI), and N-vinyl maleimide (VMI). Copolymerization of 2VS with glycidyl methacrylate (GMA) also afforded copolymers containing selenophene and reactive epoxy units in the side chains. The selenophene-containing poly(2VS) showed a high refractive index (1.6420 @ 589 nm) and a reasonable Abbe number (30.7). High refractive indexes of 1.6138-1.5959 with corresponding Abbe numbers of ~30 were similarly achieved for the selenophene/maleimide copolymers. The introduction of the maleimide moiety into the polymer side chain improved its thermal stability and enhanced the glass transition temperature Selenophene-containing copolymers with pendant N-vinyl units were obtained via copolymerization of 2VS and VMI, which was successfully employed as a precursor for obtaining a photoinduced crosslinked film via a thiol-ene reaction with 1,6-hexanedithiol in the presence of a photo-radical initiator under UV irradiation Thus, for the first time, photocurable and high-refractive-index selenophene-based copolymers were developed through the combination of a selenophene-containing vinyl monomer and a maleimide derivative with a pendant N-vinyl group. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Electric Literature of C14H12S2).

Benzyl benzodithioate (cas: 27249-90-7) 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. 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.Electric Literature of C14H12S2

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

In/Cu Catalyzed Multiple C-N/C-C Bond Formation via Multiple Bond Cleavage in a Three Component Synthesis of Arylimidazopyridine Carboxylates was written by Roslan, Irwan Iskandar;Ng, Kian-Hong;Alhooshani, Khalid R.;Jaenicke, Stephan;Chuah, Gaik-Khuan. And the article was included in Asian Journal of Organic Chemistry in 2021.Electric Literature of C11H20O4 This article mentions the following:

A protocol for In and Cu co-catalyzed synthesis of a wide array of arylimidazopyridine carboxylates I [R¹ = Ph, 3-thienyl, 2-naphthyl, etc.; R² = CN, CO₂Me, CO₂Et, etc.; R³ = H, 8-Me, 7-OMe, etc.] by three component coupling of aryl aldehydes, malonic esters and 2-aminopyridines was described. The reaction proceeded through a reaction cascade of Knoevenagel condensation, 1,4-conjugate addition, aerobic dehydrogenation, Ortoleva-King reaction and decarboxylation. Multiple C-N and C-C bond formations in addition to multiple C-C, C-H, C-O, and N-H bond cleavages were involved in forming the product. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Electric Literature of C11H20O4).

malonic acid dibutyl ester (cas: 1190-39-2) 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. 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.Electric Literature of C11H20O4

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