Tag: 100-200

Identification and Composition of Clasper Scent Gland Components of the Butterfly Heliconius erato and Its Relation to Mimicry was written by Ehlers, Stephanie;Szczerbowski, Daiane;Harig, Tim;Stell, Matthew;Hotling, Susan;Darragh, Kathy;Jiggins, Chris D.;Schulz, Stefan. And the article was included in ChemBioChem in 2021.Formula: C10H20O2 This article mentions the following:

The butterfly Heliconius erato occurs in various mimetic morphs. The male clasper scent gland releases an anti-aphrodisiac pheromone and addnl. contains a complex mixture of up to 350 components, varying between individuals. In 114 samples of five different mimicry groups and their hybrids 750 different compounds were detected by gas chromatog./mass spectrometry (GC/MS). Many unknown components occurred, which were identified using their mass spectra, gas chromatog./IR spectroscopy (GC/IR)-analyses, derivatization, and synthesis. Key compounds proved to be various esters of 3-oxohexan-1-ol and (Z)-3-hexen-1-ol with (S)-2,3-dihydrofarnesoic acid, accompanied by a large variety of other esters with longer terpene acids, fatty acids, and various alcs. In addition, linear terpenes with up to seven uniformly connected isoprene units occur, e. g. farnesylfarnesol. A large number of the compounds have not been reported before from nature. Discriminant analyses of principal components of the gland contents showed that the iridescent mimicry group differs strongly from the other, mostly also separated, mimicry groups. Comparison with data from other species indicated that Heliconius recruits different biosynthetic pathways in a species-specific manner for semiochem. formation. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Formula: 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. Polyesters are important plastics, with monomers linked by ester moieties. 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.Formula: C10H20O2

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

Dynamic kinetic resolution in the asymmetric synthesis of β-amino acids by organocatalytic reduction of enamines with trichlorosilane was written by Malkov, Andrei V.;Stoncius, Sigitas;Vrankova, Kvetoslava;Arndt, Matthias;Kocovsky, Pavel. And the article was included in Chemistry – A European Journal in 2008.Category: esters-buliding-blocks This article mentions the following:

A new, expedient protocol has been developed for the asym. synthesis of β³– and β^2,3-amino acid derivatives from enamine precursors. The method relies on a fast equilibrium between the enamine and imine forms. Reduction of the imine with Cl₃SiH, catalyzed by the L-valine-derived formamide, OHCN(Me)CH(iso-Pr)CONHC₆H₃(tert-Bu)₂-3,5, (5 mol%), afforded the corresponding amino esters in good yields, good enantioselectivities (â‰?0% ee) and high diastereoselectivities (â‰?9% de). In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8Category: esters-buliding-blocks).

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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.Category: esters-buliding-blocks

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

Derivatives of 2,3,5,6,7,7a-hexahydro-1,3-dioxo-1H-pyrrolo[1,2-c]imidazole-5-carboxylic acids was written by Fontanella, L.;Corsico, N.;Diena, A.;Occelli, E.. And the article was included in Farmaco, Edizione Scientifica in 1984.SDS of cas: 16413-26-6 This article mentions the following:

1-Carbamoylpyrrolidines I (R = Ph, tolyl, anisyl, halo-, nitro-, or cyanophenyl) were converted to pyrroloimidazolecarboxamides II (R¹ and R² are H, alkyl, or NR¹R² = pyrrolidino), which showed anxiolytic activity. I (R = Ph) was heated with HCl to give acid III, and III was treated with ClCO₂Et, Et₃N, and NH₃ to give II (R = Ph, R¹ = R² = H). In the experiment, the researchers used many compounds, for example, 3-Cyanophenylisocyanate (cas: 16413-26-6SDS of cas: 16413-26-6).

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. 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: 16413-26-6

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

Development of hydroxypropyl methylcellulose film with xanthan gum and its application as an excellent food packaging bio-material in enhancing the shelf life of banana was written by Zheng, Meixia;Chen, Jianfu;Tan, Kok Bing;Chen, Meichun;Zhu, Yujing. And the article was included in Food Chemistry in 2022.Category: esters-buliding-blocks This article mentions the following:

A novel film composed of xanthan gum (XG) and hydroxypropyl methylcellulose (HPMC) was prepared (XH). The films were characterized by Fourier transform IR spectroscopy (FT-IR), X-ray diffraction (XRD), and SEM (SEM). The light transmittance, mech. properties and water vapor transmission rate (WVTR) indicated the good compatibility between XG and HPMC with hydrogen-bond interaction and XG had a significant effect on the chem. structure, crystalline texture and microstructure of the XH composite film. The best XH sample with optimum XG concentration of 2 g/L was used as food packaging via coating onto banana, whereby the weight loss rate on banana was able to decreased from 25 ± 3% (without XH coating) to 16 ± 4% (with XH coating). Consequently, the release of flavor substances was also decreased. Banana shelf life has qual. improved with XH composite film for food preservation and affirmed the uses in food packaging applications. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Category: esters-buliding-blocks).

Isopentyl 3-methylbutanoate (cas: 659-70-1) 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.Category: esters-buliding-blocks

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

Iodine-catalysed sp³ C-H sulfonylation to form β-dicarbonyl sulfones with sodium sulfinates was written by Gao, Wen-Chao;Zhao, Jin-Jin;Chang, Hong-Hong;Li, Xing;Liu, Qiang;Wei, Wen-Long. And the article was included in RSC Advances in 2014.COA of Formula: C9H10O3S This article mentions the following:

An efficient and easily handled method for β-dicarbonyl sulfones with sodium sulfinates as the sulfonyl source was developed. This transformation was involved in the iodine-catalyzed sp³ C-H sulfonylation of β-dicarbonyl compounds In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8COA of Formula: C9H10O3S).

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) 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. 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.COA of Formula: C9H10O3S

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

Domino Prins Cyclization of Enynols: Stereoselective Synthesis of Bicyclic Vinyl Fluorides was written by Venkateswarlu, Anipireddy;Kanakaraju, Marumudi;Kunwar, Ajit C.;Rami Reddy, Yellala V.;Reddy, Basi V. S.. And the article was included in European Journal of Organic Chemistry in 2015.HPLC of Formula: 17920-23-9 This article mentions the following:

A fluoride-induced termination of Prins cyclization was observed using a tethered alkyne and stoichiometric amounts of AgSbF₆ and found to generate a novel series of 6-fluoro-1-aryl-hexahydro-1H-isochromene derivatives in good yields with excellent selectivity. This was the first report of the synthesis of fluoro-substituted oxabicycles. In this tandem process, three reactions occurred in one-pot to leading to installation of three contiguous stereocenters. In the experiment, the researchers used many compounds, for example, Diethyl 2-(prop-2-yn-1-yl)malonate (cas: 17920-23-9HPLC of Formula: 17920-23-9).

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. 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.HPLC of Formula: 17920-23-9

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

Synthesis, characterization, reactivity, and catalytic studies of heterobimetallic vanadium(V) complexes containing hydrazone ligands was written by Kumar, Arvind;Kurbah, Sunshine D.;Syiemlieh, Ibanphylla;Dhanpat, Shobha A.;Borthakur, Rosmita;Lal, Ram A.. And the article was included in Inorganica Chimica Acta in 2021.Recommanded Product: Ethyl 2-hydroxybenzoate This article mentions the following:

Six heterobimetallic alkali metal dioxidovanadium(V) coordination polymer complexes {[M₆{VO(μ-O)}₂(μ-OH)₄(μ₄-slox/nph)].n DMF}_{âˆ?/sub> where M = Na, K, and Cs; n = 1 for (1), 0 for (2)-(6) of two dihydrazone ligands, disalicylaldehydeoxaloyldihydrazone (H4slox) and bis(2-hydroxy-1-naphthaldehyde)oxaloyldihydrazone (H4nph) are reported. All the complexes were characterized by various physicochem. techniques such as elemental analyses, molar conductance, IR, NMR, UV-visible, and cyclic voltammetry. The IR, ¹HNMR, and ¹³CNMR spectral data suggest that the dihydrazones are coordinated through phenolate/naphtholate oxygen, enolate oxygen, and azine nitrogen atoms to the metal centers. The structure of {[Na6{VO(μ-O)}2(μ-OH)4(μ4-slox)].DMF}âˆ?/sub> (1) is also determined by single-crystal x-ray data, which revealed that the H4slox coordinated via all possible dative sites to metal centers as tetrabasic octadentate ligand. The vanadium metal centers adopted distorted square-pyramidal coordination geometries, and the sodium atoms are also in five coordination atms. The electronic spectra of the complexes showed LMCT bands in addition to intra-ligand π â†?π^* and n â†?π^* transitions. As evident from the cyclic voltammetry, the complexes showed two metal-centered electron transfer reactions [(V^VV^V(slox)^2-)/V^VV^IV(slox)^3-] and [(V^VV^IV(slox)^3-)/V^VV^IV(slox)^4-], in addition to the ligand centered electron transfer reactions. Further, bovine serum albumin (BSA) interaction studies of {[Na6{VO(μ-O)}2(μ-OH)4(μ4-slox)].DMF}âˆ?/sub> (1) and [Na6{VO(μ-O)}2(μ-OH)4(μ4-nph)]âˆ?/sub> (4) revealed strong binding affinity. Also, the catalytic studies of 1 and 4 are effective for the oxidation of alcs. into their corresponding aldehydes and ketones and bromination of some organic substrates in the presence of H2O2 as an oxidizing agent. 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 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. 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: Ethyl 2-hydroxybenzoate

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

Hydrogenation of Alkyl Carboxylic Acids with Tetrahydropyrimidine-Derived Iridium Complexes under Mild Conditions was written by Lu, Sheng-Mei;Wang, Meng-Meng;Lin, Xiangfeng;Li, Can. And the article was included in ACS Catalysis in 2022.Product Details of 659-70-1 This article mentions the following:

Reported herein are competent iridium catalysts [Cp*Ir(N,N’)(H₂O)][OTf]₂ (N,N’ = three different 2,2′-bi-1,4,5,6-tetrahydropyrimidines) for application in the catalytic hydrogenation of a series of alkyl carboxylic acids under mild conditions (25-100°C) without any additives. Among these structurally diverse catalysts evaluated for reactivity, the complex bearing an electron-deficient ligand (N,N’ = 2,2′-bi-5,5′-hydroxyl-1,4,5,6-tetrahydropyrimidine) was the most robust, which can hydrogenate acetic acid smoothly at 25°C to give the alc. and ester products with a TON of 1106. Detailed mechanistic studies suggest that the generation of an [Ir-H] intermediate was involved in the rate-limiting step. With this catalyst system, a broad range of alkyl carboxylic acids were hydrogenated with moderate to high TONs. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Product Details of 659-70-1).

Isopentyl 3-methylbutanoate (cas: 659-70-1) 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. 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.Product Details of 659-70-1

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

Variation of floral volatiles and fragrance reveals the phylogenetic relationship among nine wild tree peony species was written by Luo, Xiaoning;Yuan, Meng;Li, Bingjie;Li, Chenyao;Zhang, Yanlong;Shi, Qianqian. And the article was included in Flavour and Fragrance Journal in 2020.COA of Formula: C9H10O3 This article mentions the following:

In present study, volatile components in petals of nine wild tree peony species were analyzed using a headspace solid-phase microextraction (SPME) technique coupled with gas chromatog.-mass spectrometry (GC-MS). A total of 124 volatile components were identified and clustered into five major chem. classes: terpenoids, alkanes, alcs., aldehydes, and ketones. Overall, combined with the sensory evaluation of nine wild tree peony species, Paeonia. ostii (P2) performed herbal and waxy attributes, mainly dominated by hexanal and pentadecane, resp. P rockii (P1), P qiui (P3), P jishanensis (P4), and P decomposita (P5) all possessed sweet attribute, which was pos. correlated with geraniol and citronellol. P delavayi (P9), P lutea (P7), P ludlowii (P8), and P potanini (P6) performed intense floral attribute dominated by linalool and trans-linalool oxide. Moreover, the results of principal component anal. (PCA) and hierarchical clustering anal. (HCA) showed P decomposita (P5), P qiui (P3), P rockii (P1), P jishanensis (P4), and P ostii (P2) in the Subsect. Vagiatae were mixed to form one cluster while P lutea (P7), P delavayi (P9), P ludlowii (P8), and P potanini (P6) in the Subsect. Delavayanae formed the other cluster. In terms of geog. distribution, the two clusters are consistent with the distribution of wild tree peony species. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6COA of Formula: C9H10O3).

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. 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.COA of Formula: C9H10O3

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

Comparative evaluation of the effects of natural and artificial inoculation on soybean paste fermentation was written by Zhang, Xiao;Shan, Tingting;Jia, Hang;Guo, Chunfeng;Wang, Zhouli;Yue, Tianli;Yuan, Yahong. And the article was included in LWT–Food Science and Technology in 2022.Synthetic Route of C6H12O2 This article mentions the following:

Soybean pastes fermented with natural (NIS) and artificial (AIS) inoculation were prepared to evaluate their fermentation characteristics, flavor compounds and microbial community compositions across an entire fermentation period. The results showed that the initial concentrations of free amino acids and aroma compounds were higher in NIS than in AIS, whereas it was opposite at the end of fermentation A larger variation of flavor compounds was observed in AIS, which was associated with higher level of microbial metabolism during AIS fermentation Penicillium and Tetragenococcus were the dominant microbial genera in NIS, while Aspergillus and Pediococcus were predominant in AIS. Correlation anal. of flavor compounds and microbial community dynamics during NIS and AIS fermentation revealed the specific role of microbial taxa in metabolite transformations. Pediococcus acidilactici could be the key microorganism strongly associated with 23 flavor compounds during AIS fermentation Further, Aspergillus oryzae and Pediococcus acidilactici were primarily linked to amino acid metabolism in AIS, whereas Penicillium and Yaniella were found associated with aroma compounds, Tetragenococcus_sp_JNURIC_D6 and Candida solani with that of organic acids in NIS. These findings provide substantial data on the development of flavor-enhancing fermentation starter culture and the better control of flavor ripening in soybean paste production In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Synthetic Route of C6H12O2).

Methyl2-methylbutyrate (cas: 868-57-5) 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.Synthetic Route of C6H12O2

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