Tag: 100-200

An Orthogonal Dynamic Covalent Polymer Network with Distinctive Topology Transformations for Shape- and Molecular Architecture Reconfiguration was written by Miao, Wusha;Yang, Bo;Jin, Binjie;Ni, Chujun;Feng, Haijun;Xue, Yaoting;Zheng, Ning;Zhao, Qian;Shen, Youqing;Xie, Tao. And the article was included in Angewandte Chemie, International Edition in 2022.Computed Properties of C11H22O2 The following contents are mentioned in the article:

Bond exchange in a typical dynamic covalent polymer network allows access to macroscopic shape reconfigurability, but the network architecture is not altered. An alternative possibility is that the network architecture can be designed to switch to various topol. states corresponding to different material properties. Achieving both in one network can expand the material scope, but their intrinsically conflicting mechanisms make it challenging. We design a dynamic covalent network that can undergo two orthogonal topol. transformations, namely transesterification on the branched chains and olefin metathesis on the mainframe. This allows independent control of the macroscopic shape and mol. architecture. With this design, we illustrate a bottlebrush network with programmable shape and spatially definable mech. properties. Our strategy paves a way to on-demand regulation of network polymers. This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Computed Properties of C11H22O2).

Isopentyl hexanoate (cas: 2198-61-0) 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.Computed Properties of C11H22O2

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

Boron-Catalyzed Double Hydrofunctionalization Reactions of Unactivated Alkynes was written by Shibuya, Masatoshi;Okamoto, Masaki;Fujita, Shoji;Abe, Masanori;Yamamoto, Yoshihiko. And the article was included in ACS Catalysis in 2018.Application of 106-73-0 The following contents are mentioned in the article:

In the presence of (C₆F₅)₃B·nH₂O, alkynyl alcs. such as HOCH₂CPh₂CH₂CCH underwent tandem hydroalkoxylation and hydroallylation or hydrocyanation reactions with allyltrimethylsilane or cyanotrimethylsilane with H₂O as a proton source to yield cyano- and allyl-substituted tetrahydrofurans such as I (R = H₂C:CHCH₂, NC). The high alkynophilicity of B(C₆F₅)₃ enabled the selective activation of unactivated alkynes in the presence of the alkene moiety of allylsilane and in the presence of cyanide. ¹⁹F NMR of intermediate reaction mixtures indicated that alkynes were activated by free (C₆F₅)₃B in allylation reactions and by H⁺[(C₆F₅)₃BCN^–] in cyanation reactions. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Application of 106-73-0).

Methyl heptanoate (cas: 106-73-0) 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.Application of 106-73-0

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

Oxidative esterification of aliphatic aldehydes and alcohols with ethanol over gold nanoparticle catalysts in batch and continuous flow reactors was written by Taketoshi, Ayako;Ishida, Tamao;Murayama, Toru;Honma, Tetsuo;Haruta, Masatake. And the article was included in Applied Catalysis, A: General in 2019.SDS of cas: 112-14-1 The following contents are mentioned in the article:

Selective esterification of aliphatic aldehydes and alcs. with ethanol in the absence of a base is a more difficult reaction than that with methanol. Gold nanoparticles on ZnO were found to catalyze the oxidative esterification of octanal to Et octanoate with high selectivity. In addition, it was found that Au/ZnO was the most effective catalyst for yielding the desired Et ester without a base by direct esterification of 1-octanol with ethanol. As far as we know, this is the first report on oxidative esterification to give aliphatic Et esters from less reactive aliphatic alcs. and aldehydes without a base. The optimal size of gold NPs ranged from 2 to 6 nm and the presence of Au(0) was indispensable for this reaction. Au/ZnO exhibited the highest catalytic activity in both batch and flow reactors. The conversion was maintained for more than 20 h with 95% selectivity to the desired Et ester in the flow system. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1SDS of cas: 112-14-1).

Octyl acetate (cas: 112-14-1) 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.SDS of cas: 112-14-1

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

The effect of sugarcane bagasse to rubber seed oil ratios on the chemical composition of liquid fuels produced by zeolite-Y catalyzed pyrolysis was written by Simanjuntak, A.;Simanjuntak, W.;Pandiangan, K. D.;Sembiring, Z.. And the article was included in Journal of Physics: Conference Series in 2019.Synthetic Route of C8H16O2 The following contents are mentioned in the article:

In this research, co-pyrolysis of sugarcane bagasse and rubber seed oil using zeolite-Y as catalyst was carried out, with the main purpose to study the effect of raw material compositions on chem. composition of liquid fuel produced. For this purpose, the mixture of sugarcane bagasse and rubber seed oil with different mass ratios of bagasse to oil of 1 : 1; 1: 2; 1: 3: and 1: 4 was subjected to pyrolysis at 450° C in the presence of zeolite-Y as catalyst, and the liquid fuels were analyzed by GC-MS. The results show that liquid fuel contains hydrocarbons as main components, with several addnl. components include alcs., esters, ketones, aldehydes, and acids. The liquid fuel produced from the raw material with the ratio of 1 : 3 was found to contain hydrocarbon with the highest relative percentage (87.91%), and consists of gasoline fraction (42.60%), kerosene fraction (43.59%), and residual fraction (1.72%). This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Synthetic Route of C8H16O2).

Methyl heptanoate (cas: 106-73-0) 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.Synthetic Route of C8H16O2

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

Hepatoprotective effects of Moringa oleifera Lam (Moringaceae) leaf extracts in streptozotocin-induced diabetes in rats was written by Muzumbukilwa, Willy Tambwe;Nlooto, Manimbulu;Owira, Peter Mark Oroma. And the article was included in Journal of Functional Foods in 2019.Synthetic Route of C10H20O2 The following contents are mentioned in the article:

Effects of methanolic leaf extracts of Moringa oleifera (MO) on hepatic injury in streptozotocin (STZ)-induced diabetes were investigated. Male Wister rats were divided into 6 groups (n = 7). Animals in group A were orally treated daily with 3.0 mL/kg/body weight (BW) of distilled water, while B, E and F were similarly treated with 500, 250 and 500 mg/kg/BW of MO, resp. Groups C-F were rendered diabetic by single i.p. injections of 45 mg/kg/BW of STZ. Addnl., group D was treated with s.c. insulin (2.0 U/kg/BW, bid). Diabetic animals exhibited significant weight loss, polydipsia, impaired glucose tolerance, fasting hypoinsulinemia and impaired liver function tests compared to controls. Treatment with MO methanolic leaf extracts significantly improved weight loss, polydipsia, glucose tolerance and also liver function tests in diabetic animals. MO has dose-dependent antidiabetic and hepatoprotective effects. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Synthetic Route of C10H20O2).

Octyl acetate (cas: 112-14-1) 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. 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.Synthetic Route of C10H20O2

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

Physical and sensory properties of lemon-flavored acidic beverages formulated with nonfat dry milk during storage was written by Li, Nan;Choi, Inseob;Vuia-Riser, Jennifer;Carter, Brandon;Drake, MaryAnne;Zhong, Qixin. And the article was included in Journal of Dairy Science in 2022.Application In Synthesis of Octyl acetate The following contents are mentioned in the article:

Sensory and phys. properties of 2 lemon-flavored beverages with 5% and 7.5% wt/wt nonfat dry milk (NFDM) at pH 2.5 were studied during storage. The 2 beverages had similar volatile compounds, but the 5% NFDM had higher aroma and lemon flavor, with a preferred appearance by consumers due to the lower turbidity and viscosity. After 28 d of storage at 4°C, lemon flavor decreased in the 5% NFDM beverage but was still more intense than the 7.5% one. During 70 d of storage, no microorganisms were detected, and the beverages were more stable when stored at 4°C than at room temperature according to changes of phys. properties measured for appearance, turbidity, color, particle size, zeta potential, rheol. properties, and transmission electron microscopy morphol. Findings of the present study suggest that NFDM may be used at 5% wt/wt to produce stable acidic dairy beverages with low turbidity when stored at 4°C. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Application In Synthesis of Octyl acetate).

Octyl acetate (cas: 112-14-1) 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. 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.Application In Synthesis of Octyl acetate

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

Mass spectra of new heterocycles: XVI. Electron impact study of alkyl 5-aminothiophene-2-carboxylates was written by Klyba, L. V.;Nedolya, N. A.;Sanzheeva, E. R.;Tarasova, O. A.. And the article was included in Russian Journal of Organic Chemistry in 2017.Recommanded Product: Isopropylisothiocyanate The following contents are mentioned in the article:

Synthesis and electron impact mass spectra of alkyl 4-alkoxy-5-amino-3-methylthiophene-2-carboxylates were studied. These compounds, except for 4-(1-ethoxyethoxy) and 4-(ferrocenylmethoxy) derivatives, gave rise to a stable mol. ion whose decomposition followed three pathways. The main fragmentation pathway of the mol. ion was elimination of alkyl radical from the 4-alkoxy group, the second pathway involved expulsion of alkoxy group from the ester moiety, and the third pathway was decomposition of the thiophene ring. The mol. ions of 4-(1-ethoxyethoxy)thiophenes decomposed mainly via elimination of Et vinyl ether mol. with formation of [M-VinOEt]^+· odd-electron ion, and fragmetation of the latter followed general pathways. In the mass spectra of 4-(ferrocenylmethoxy)thiophenes, the most abundant were ferrocenylmethyl ion with m/z 199 (I_rel 100%) and fragmet ions derived therefrom. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Recommanded Product: Isopropylisothiocyanate).

Isopropylisothiocyanate (cas: 2253-73-8) 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. 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.Recommanded Product: Isopropylisothiocyanate

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

A new stationary phase for capillary gas chromatography: Calix[4]resorcinarene functionalized with imidazolium cationic units was written by Shuai, Xiaomin;Cai, Zhiqiang;Zhao, Xinyu;Chen, Yujie;Zhang, Qian;Ma, Ziwei;Hu, Junjie;Sun, Tao;Hu, Shaoqiang. And the article was included in Chromatographia in 2021.Application In Synthesis of Methyl heptanoate The following contents are mentioned in the article:

A novel calix[4]resorcinarene-based ionic liquid (C4RA-2IL) was synthesized, structurally characterized, and statically coated on capillary column as stationary phase for capillary gas chromatog. (GC). The column efficiency of the C4RA-2IL column is 3345 plates m^-1, which are determined by n-dodecane at 120°C. Based on its McReynolds constants, the C4RA-2IL column showed moderate polarity. Particularly, the C4RA-2IL column show high separation performance for a wide range of analytes and some difficult separation of meta/para-isomers. Moreover, it exhibited excellent selectivity for critical aromatic isomers of chloroaniline, bromaniline, iodoaniline, toluidine and xylidine isomers and shows advantageous separation capability over the com. polysiloxane stationary phase. This work presents a promising future of calixarene-based ionic liquid as a new type of stationary phase in GC separations This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Application In Synthesis of Methyl heptanoate).

Methyl heptanoate (cas: 106-73-0) 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. Application In Synthesis of Methyl heptanoate

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

Evaluation of Penicillium expansum for growth, patulin accumulation, nonvolatile compounds and volatile profile in kiwi juices of different cultivars was written by Wang, Yuan;Shan, Tingting;Yuan, Yahong;Zhang, Zhiwei;Guo, Chunfeng;Yue, Tianli. And the article was included in Food Chemistry in 2017.Name: Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

Patulin (PAT) contamination and changes of nonvolatile and volatile compounds caused by Penicillium expansum in fresh juices of 8 kiwi cultivars were investigated. Growth and PAT production of P. expansum were greater at 25 °C than at 4 °C. P. expansum grew in kiwi juices under pH ranging from 2.75 to 3.27 and produced 45.10-268.88 μg/mL of PAT at 25 °C. Decreases occurred in malic acid and soluble protein; while consumption and production simultaneously happened for reducing sugar, total soluble solid, titratable acid, citric acid, ascorbic acid and total phenolics. A large number of volatile organic compounds (VOCs) were produced during infection and each cultivar presented a distinct profile. Most of the alcs., acids, ketones and phenols increased while aldehydes decreased. VOCs that were specific to infected kiwi juices are potential biomarkers for GC-MS anal. of kiwifruit infected by P. expansum. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Name: Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) 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. 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.Name: Ethyl 3-ethoxypropanoate

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

Reagent-Controlled Divergent Synthesis of 2-Amino-1,3-Benzoxazines and 2-Amino-1,3-Benzothiazines was written by Putta, V. P. Rama Kishore;Vodnala, Nagaraju;Gujjarappa, Raghuram;Tyagi, Ujjawal;Garg, Aakriti;Gupta, Sreya;Pujar, Prasad Pralhad;Malakar, Chandi C.. And the article was included in Journal of Organic Chemistry in 2020.Reference of 2253-73-8 The following contents are mentioned in the article:

A reagent-controlled chemoselective process has been devised for the synthesis of 4H-1,3-benzoxazines and related biol. important heterocycles in high yields under mild conditions. These scaffolds could be efficiently constructed using two different chemoselective reactions that rely on the choice of reagents and reaction conditions. The treatment of various 2-amino-arylalkyl alcs. with isothiocyanates afforded thiourea intermediates, which were reacted in situ with mol. iodine in the presence of triethylamine to give 2-amino-4H-1,3-benzoxazines, whereas the corresponding 2-amino-4H-1,3-benzothiazines were obtained by the reaction of thiourea intermediates in the presence of T3P (a mild cyclodehydrating agent) and triethylamine as the base. The described protocol represents the first example for the synthesis of 4H-1,3-benzoxazines via the dehydrosulfurization method using mol. iodine as the reagent. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Reference of 2253-73-8).

Isopropylisothiocyanate (cas: 2253-73-8) 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.Reference of 2253-73-8

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