Month: January 2023

Unprecedented crystallization and X-ray crystal structure of racemic N^α-(t-butyloxycarbonyl)-L-phenylalanine N-methoxy-N-methylamide was written by Zheng, Xiaozhang;Donkor, Isaac O.;Miller, Duane D.;Ross, Charles R. II. And the article was included in Chirality in 2000.Reference of 87694-53-9 This article mentions the following:

Weinreb amide Boc-Phe-N(Me)OMe was synthesized from Boc-Phe-OH and O,N-dimethylhydroxylamine hydrochloride using iso-Bu chloroformate with the coupling agent being carbonyldiimidazole or ethylcarbodiimide. An optically active oil was isolated along with an optically inactive solid irresp. of the type of coupling agent used. Single crystal x-ray anal. of the solid revealed that it is a racemate. The mol. packing of the crystals reflect the stability of the racemate as opposed to an enantiomerically pure solid. In the experiment, the researchers used many compounds, for example, (S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate (cas: 87694-53-9Reference of 87694-53-9).

(S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate (cas: 87694-53-9) 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, 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. Reference of 87694-53-9

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

Thienopyridine urea inhibitors of KDR kinase was written by Heyman, H. Robin;Frey, Robin R.;Bousquet, Peter F.;Cunha, George A.;Moskey, Maria D.;Ahmed, Asma A.;Soni, Niru B.;Marcotte, Patrick A.;Pease, Lori J.;Glaser, Keith B.;Yates, Melinda;Bouska, Jennifer J.;Albert, Daniel H.;Black-Schaefer, Candace L.;Dandliker, Peter J.;Stewart, Kent D.;Rafferty, Paul;Davidsen, Steven K.;Michaelides, Michael R.;Curtin, Michael L.. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2007.Application of 16413-26-6 This article mentions the following:

A series of substituted thienopyridine ureas was prepared and evaluated for enzymic and cellular inhibition of KDR kinase activity. Several of these analogs, such as I, are potent inhibitors of KDR (<10 nM) in both enzymic and cellular assays. Further characterization of inhibitor I indicated that this analog possessed excellent in vivo potency (ED₅₀ 2.1 mg/kg) as measured in an estradiol-induced mouse uterine edema model. In the experiment, the researchers used many compounds, for example, 3-Cyanophenylisocyanate (cas: 16413-26-6Application of 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. 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 of 16413-26-6

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

Macrocyclic Immunoproteasome Inhibitors as a Potential Therapy for Alzheimer’s Disease was written by Lee, Min Jae;Bhattarai, Deepak;Jang, Hyeryung;Baek, Ahreum;Yeo, In Jun;Lee, Seongsoo;Miller, Zachary;Lee, Sukyeong;Hong, Jin Tae;Kim, Dong-Eun;Lee, Wooin;Kim, Kyung Bo. And the article was included in Journal of Medicinal Chemistry in 2021.Product Details of 87694-53-9 This article mentions the following:

Previously, we reported that immunoproteasome (iP)-targeting linear peptide epoxyketones improve cognitive function in mouse models of Alzheimer’s disease (AD) in a manner independent of amyloid β. However, these compounds’ clin. prospect for AD is limited due to potential issues, such as poor brain penetration and metabolic instability. Here, we report the development of iP-selective macrocyclic peptide epoxyketones prepared by a ring-closing metathesis reaction between two terminal alkenes attached at the P2 and P3/P4 positions of linear counterparts. We show that a lead macrocyclic compound DB-60 (20) effectively inhibits the catalytic activity of iP in ABCB1-overexpressing cells (IC₅₀: 105 nM) and has metabolic stability superior to its linear counterpart. DB-60 (20) also lowered the serum levels of IL-1α and ameliorated cognitive deficits in Tg2576 mice. The results collectively suggest that macrocyclic peptide epoxyketones have improved CNS drug properties than their linear counterparts and offer promising potential as an AD drug candidate. In the experiment, the researchers used many compounds, for example, (S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate (cas: 87694-53-9Product Details of 87694-53-9).

(S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate (cas: 87694-53-9) 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.Product Details of 87694-53-9

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

Synthesis of 4-hydroxy(alkyloyloxy,aryloyloxy)-3-methoxy(ethoxy)phenylmethylene-(2-carboxyphenyl)amines was written by Dikusar, E. A.;Kozlov, N. G.;Potkin, V. I.;Zelenkovskii, V. M.;Malama, A. A.;Dubovik, S. V.. And the article was included in Vestsi Natsyyanal’nai Akademii Navuk Belarusi, Seryya Khimichnykh Navuk in 2005.Reference of 20665-85-4 This article mentions the following:

Schiff bases of general formula 3-R¹O-4-R²OC₆H₃CH:NC₆H₄CO₂H-2 (R¹ = Me, Et; R² = H, MeCO, H₂C:CHCO, 2-ClC₆H₄CO, etc.) were synthesized by condensation of the corresponding 3,4-disubstituted benzaldehydes with 2-aminobenzoic acid. The products were obtained as mixtures of E- and Z-isomers in the 3:2 ratio. The formation enthalpies for both E- and Z-isomers of some of the products were calculated using semiempirical MNDO-PM3 approach confirming the better thermodn. stability of the E-isomers. In the experiment, the researchers used many compounds, for example, 4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4Reference of 20665-85-4).

4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4) 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.Reference of 20665-85-4

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

Effects of brown sugar addition and fermentation time on metabolites and microbial communities of Yibin Yacai was written by Zou, Yuke;Zhong, Yixin;Huang, Lihui;Xu, Wei;Wu, Yanping;Gao, Jia;Zhong, Kai;Gao, Hong. And the article was included in LWT–Food Science and Technology in 2022.Computed Properties of C10H18O2 This article mentions the following:

Yibin Yacai is one of the most popular pickled vegetables in Sichuan made from special local stem mustard via spontaneous fermentation The final quality of the Yibin Yacai product depends on every manufacturing process that affects the microbial communities during fermentation In this study, the effects of brown sugar addition and fermentation time on physicochem. quality, flavor, and microbial communities of Yibin Yacai under five different fermentation conditions were investigated. The brown sugar addition can effectively increase the activities of microorganisms such as Lactobacillus and Debaryomyces, resulting in an increase in lactic acid content, sweet amino acids and umami amino acids. Furthermore, fermentation time plays a critical role in determining their physicochem. quality and flavor. The Yibin Yacai samples fermented for 5 years present the highest content of reducing sugar, amino acid nitrogen, esters, aldehydes, and olefins, while having the lowest salinity. These results indicate that the brown sugar addition and fermentation time could significantly influence the physicochem. and flavor qualities of the Yibin Yacai by tuning microbial communities during fermentation These findings reveal the importance of controlling manufacturing processes for traditionally fermented Yibin Yacai and provide a new perspective on the technol. innovation of fermented Yibin Yacai. In the experiment, the researchers used many compounds, for example, 5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9Computed Properties of C10H18O2).

5-Hexyldihydrofuran-2(3H)-one (cas: 706-14-9) 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, 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.Computed Properties of C10H18O2

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

Two Competitive but Switchable Organocatalytic Cascade Reaction Pathways: The Diversified Synthesis of Chiral Acetal-Containing Bridged Cyclic Compounds was written by Lv, Xue-Jiao;Chen, Ying-Han;Liu, Yan-Kai. And the article was included in Organic Letters in 2019.Related Products of 33166-79-9 This article mentions the following:

β-Keto esters such as Et benzoylacetate underwent α-oxidation with mCPBA followed by base-mediated Michael addition to hydroxy- or amino-substituted cinnamaldehydes such as trans-o-hydroxycinnamaldehyde, cyclization in the presence of a proline-derived silyl ether, and acetalization in the presence of BF₃·Et₂O to yield methanobenzodioxepines such as I. The sequence avoids the isolation of unstable α-hydroxy-β-keto esters which oxidize to diketo esters on attempted isolation. Reaction of β-keto esters and hydroxy-substituted cinnamaldehydes with omission of mCPBA under similar conditions and yielded benzodioxocinecarboxylates such as II. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Related Products of 33166-79-9).

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

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

Characterization of key odor-active compounds in thermal reaction beef flavoring by SGCxGC-O-MS, AEDA, DHDA, OAV and quantitative measurements was written by Wang, Haili;Yang, Ping;Liu, Chen;Song, Huanlu;Pan, Wenqing;Gong, Lin. And the article was included in Journal of Food Composition and Analysis in 2022.Application of 695-06-7 This article mentions the following:

Thermal reaction beef flavoring is a kind of food additive. In this study, three extraction methods of dynamic headspace sampling (DHS), solid phase micro-extraction (SPME) and liquid-liquid extraction (LLE) combined with switchable two-dimensional gas chromatog.-olfactometry-mass spectrometry (SGCxGC-O-MS) were employed to characterize volatile compounds in thermal reaction beef flavoring. The odor characteristics of thermal reaction beef flavors were identified by sensory evaluation, aroma extraction dilution anal. (AEDA), dynamic headspace dilution anal. (DHDA), odor activity value (OAV) and quant. measurements. A total of 231 volatile odor compounds were identified by the three extraction methods, which including 15 aldehydes, 41 ketones, 29 alcs., 27 esters, 13 furans, 20 pyrazines, 9 sulfur-containing compounds, 18 thiophenes and thiazoles, 19 acids and 40 other compounds Ninety-eight compounds had odor activity, and 22 odor-active compounds were quant. analyzed. 2-Methyl-3-furanthiol (meaty) and bis(2-methyl-3-furanyl) disulfide (onion) had the higher FD and OAV, 3-methylbutanal (chocolate) was first identified as the key odor-active compound in thermal reaction beef flavoring, Me furfuryl disulfide (meaty), 2-ethyl-3,5-dimethylpyrazine (roasted nuts), 2,3-butanedione (caramel), linalool (floral), furfural (baked bread), 2-furfurylthiol (sulfury) and other compounds were also identified as the key aroma components in thermal reaction beef flavoring. The results showed that SPME and DHS were more suitable than LLE for the separation and extraction of volatile odor compounds in thermal reaction beef flavoring, and there were some masking and synergistic effects between odor-active compounds In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Application of 695-06-7).

5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7) 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. 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 695-06-7

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

Click chemistry-based synthesis and anticancer activity evaluation of novel C-14 1,2,3-triazole dehydroabietic acid hybrids was written by Hou, Wei;Luo, Zhi;Zhang, Guanjun;Cao, Danhui;Li, Di;Ruan, Haoqiang;Ruan, Benfang Helen;Su, Lin;Xu, Hongtao. And the article was included in European Journal of Medicinal Chemistry in 2017.Related Products of 185619-66-3 This article mentions the following:

A concise and efficient synthetic approach has been established to readily access a series of novel C-14 1,2,3-triazole-tethered dehydroabietic acid derivatives in moderate to high yields. In vitro antiproliferative activity evaluation indicated that most of the hybrids exhibited potent inhibitory activities in a variety of cancer cell lines with low micromolar to submicromolar IC₅₀ values. Further studies demonstrated that some of these analogs were also effective against adriamycin-resistant MCF-7 clone at low concentrations in a dose-dependent manner. Notably, the most potent compound I, which possesses a 3-(tert-butoxycarbonylamino)phenyl-substituted triazole moiety, not only exhibited obviously improved IC₅₀ values ranging from 0.7 to 1.2 μM against a panel of tested cancer cells, but also showed very weak cytotoxicity on normal cells. Preliminary mechanism studies indicated that compound I could induce apoptosis in MDA-MB-231 cells and was worth developing into a novel natural product-like anticancer lead by proper structure modification. In the experiment, the researchers used many compounds, for example, tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3Related Products of 185619-66-3).

tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3) 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.Related Products of 185619-66-3

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

Lemongrass Essential Oil Components with Antimicrobial and Anticancer Activities was written by Mukarram, Mohammad;Choudhary, Sadaf;Khan, Mo Ahamad;Poltronieri, Palmiro;Khan, M. Masroor A.;Ali, Jamin;Kurjak, Daniel;Shahid, Mohd. And the article was included in Antioxidants in 2022.Related Products of 105-87-3 This article mentions the following:

The prominent cultivation of lemongrass (Cymbopogon spp.) relies on the pharmacol. incentives of its essential oil. Lemongrass essential oil (LEO) carries a significant amount of numerous bioactive compounds, such as citral (mixture of geranial and neral), isoneral, isogeranial, geraniol, geranyl acetate, citronellal, citronellol, germacrene-D, and elemol, in addition to other bioactive compounds These components confer various pharmacol. actions to LEO, including antifungal, antibacterial, antiviral, anticancer, and antioxidant properties. These LEO attributes are com. exploited in the pharmaceutical, cosmetics, and food preservations industries. Furthermore, the application of LEO in the treatment of cancer opens a new vista in the field of therapeutics. Although different LEO components have shown promising anticancer activities in vitro, their effects have not yet been assessed in the human system. Hence, further studies on the anticancer mechanisms conferred by LEO components are required. The present review intends to provide a timely discussion on the relevance of LEO in combating cancer and sustaining human healthcare, as well as in food industry applications. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Related Products of 105-87-3).

(E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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 105-87-3

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

D-glucose as a pentavalent chiral scaffold was written by Opatz, Till;Kallus, Christopher;Wunberg, Tobias;Schmidt, Wolfgang;Henke, Stefan;Kunz, Horst. And the article was included in European Journal of Organic Chemistry in 2003.Safety of 3-Cyanophenylisocyanate This article mentions the following:

A novel carbohydrate-based scaffold for combinatorial chem. has been developed. This scaffold allows the selective attachment of five different side chains, giving rise to products of enormous structural diversity. As a demonstration of its usefulness, a series of model compounds has been prepared in high purity and yield by multistep parallel synthesis on a solid phase. In the experiment, the researchers used many compounds, for example, 3-Cyanophenylisocyanate (cas: 16413-26-6Safety of 3-Cyanophenylisocyanate).

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. 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.Safety of 3-Cyanophenylisocyanate

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