Tag: 100-200

In 2015,Yoon, Y. K.; Ali, M. A.; Wei, A. C.; Choon, T. S.; Oon, C. E.; Shirazi, A. N.; Parang, K. published 《Discovery of a potent and highly fluorescent sirtuin inhibitor [Erratum to document cited in CA163:681200]》.MedChemComm published the findings.Application In Synthesis of Methyl 4-fluoro-3-nitrobenzoate The information in the text is summarized as follows:

C.E. Oon was omitted from the author list on page 1857; the corrected author and affiliation lists are given. The experimental process involved the reaction of Methyl 4-fluoro-3-nitrobenzoate(cas: 329-59-9Application In Synthesis of Methyl 4-fluoro-3-nitrobenzoate)

Methyl 4-fluoro-3-nitrobenzoate(cas: 329-59-9) belongs to methyl benzoate. Methyl benzoate reacts at both the ring and the ester, depending on the substrate. Electrophiles attack the ring, illustrated by acid-catalysed nitration with nitric acid to give methyl 3-nitrobenzoate.Application In Synthesis of Methyl 4-fluoro-3-nitrobenzoateMethyl 4-fluoro-3-nitrobenzoate is used to prepare dimethyl 3-nitro-3′,4-oxydibenzoate by reacting with 3-hydroxy-benzoic acid methyl ester.

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

In 2012,Tan, Haibo; Chen, Xinzheng; Liu, Zheng; Wang, David Zhigang published 《Total synthesis of angelone enabled by a remarkable biomimetic sequence》.Tetrahedron published the findings.Reference of Methyl 3-hydroxypropanoate The information in the text is summarized as follows:

The natural product angelone (I) was readily accessed with a remarkable biomimetic journey that sequentially features carbonyl formation-elimination, 6π-electrocyclization, visible light-promoted singlet O2 Diels-Alder reaction, Kornblum-DeLaMare-type peroxide rearrangement, 6π-electrocyclic ring-opening, and conjugative addition-elimination as the key steps. With key intermediates isolated and characterized, this study stands to reveal a rare system in which bio-inspired synthetic strategies were found to mirror exptl. realities. In addition to this study using Methyl 3-hydroxypropanoate, there are many other studies that have used Methyl 3-hydroxypropanoate(cas: 6149-41-3Reference of Methyl 3-hydroxypropanoate) was used in this study.

Methyl 3-hydroxypropanoate(cas: 6149-41-3) belongs to esters with low molecular weight are commonly used as fragrances and found in essential oils and pheromones. 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 Methyl 3-hydroxypropanoate

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

The author of 《Preparation of the key dolutegravir intermediate via MgBr2-promoted cyclization》 were Kong, Jiahui; Xia, Haijian; He, Renbao; Chen, Hao; Yu, Yongping. And the article was published in Molecules in 2021. Application of 924-99-2 The author mentioned the following in the article:

A novel approach for synthesizing the key dolutegravir intermediate is described via MgBr2-promoted intramol. cyclization. Condensation of com. available Me oxalyl chloride and Et 3-(N,N-dimethylamino)acrylate afforded the vinylogous amide in an excellent yield. Subsequent substitution by aminoacetaldehyde di-Me acetal and Me bromoacetate gave rise to the expected precursor for cyclization, which was promoted by MgBr2 to highly selectively convert into pyridinone diester. The key dolutegravir intermediate was finally prepared by the selective hydrolysis of the corresponding diester via LiOH.Ethyl 3-(dimethylamino)acrylate(cas: 924-99-2Application of 924-99-2) was used in this study.

Ethyl 3-(dimethylamino)acrylate(cas: 924-99-2) belongs to anime. Halogenation, in which one or more hydrogen atoms of an amine is replaced by a halogen atom, occurs with chlorine, bromine, and iodine, as well as with some other reagents, notably hypochlorous acid (HClO). With primary amines the reaction proceeds in two stages, producing N-chloro- and N,N-dichloro-amines, RNHCl and RNCl2, respectively. With tertiary amines, an alkyl group may be displaced by a halogen.Application of 924-99-2

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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

《Synthesis of LSD1 inhibitor-pyrrole-imidazole polyamide conjugates for region-specific alterations of histone modification》 was published in Heterocycles in 2019. These research results belong to Qin, Rui; Takayanagi, Shihori; Kondo, Yusuke; Li, Jiawei; Shiga, Naoki; Nakajima, Masaya; Shinohara, Ken-ichi; Yoda, Natsumi; Suzuki, Takayoshi; Kaneda, Atsushi; Nemoto, Tetsuhiro. Quality Control of 3-(Methoxycarbonyl)benzoic acid The article mentions the following:

Synthetic method of LSD1 inhibitor-pyrrole-imidazole polyamide conjugates for region-specific alterations of histone modification is described. A (1S,2R)-tranylcypromine (PCPA) unit was coupled with an L-lysine part using a nosyl strategy. Conjugation of the inhibitor part with PIP tetramer units was achieved by amide bond formation using PyBOP as a condensation reagent. The results came from multiple reactions, including the reaction of 3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0Quality Control of 3-(Methoxycarbonyl)benzoic acid)

3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0) belongs to esters. They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.Quality Control of 3-(Methoxycarbonyl)benzoic acid They 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.

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

《Direct Synthesis of Vicinal Tricarbonyl Amides by Coupling of α-Oxo Acid Chlorides with Carbamoylsilanes》 was written by Han, Yuling; Li, Yuping; Han, Shenghua; Zhang, Pengpeng; Chen, Jianxin. Formula: C4H5ClO3This research focused onvicinal tricarbonyl amide preparation; oxo acid chloride carbamoylsilane cross coupling reaction. The article conveys some information:

A convenient synthetic method for vicinal tricarbonyl amides R(CO)3N(R1)(R2) (R = Me, Ph, OEt; R1 = Me, Bn, n-Pr; R2 = Me, CH2OCH3, 1-phenylethyl) by the cross-coupling reaction of α-oxo acid chlorides RC(O)C(O)Cl with carbamoylsilanes Si(CH3)3C(O)N(R1)(R2) is developed. The reaction tolerates a broad range of substituents on the amido nitrogen of carbamoylsilanes, and directly affords good yields of vicinal tricarbonyl amides under mild conditions without use of oxidants. The reaction of carbamoylsilanes with oxalyl chloride has also been explored, and is accompanied by decarbonylation to give vicinal tricarbonyl amides N(R1)(R2)(CO)3N(R1)(R2) (R1 = Me, R2 = Me, 1-phenylethyl). After reading the article, we found that the author used Ethyl oxalyl monochloride(cas: 4755-77-5Formula: C4H5ClO3)

Ethyl oxalyl monochloride(cas: 4755-77-5) belongs to acyl chlorides. Lacking the ability to form hydrogen bonds, acyl chlorides have lower boiling and melting points than similar carboxylic acids. For example, acetic acid boils at 118 °C, whereas acetyl chloride boils at 51 °C. Like most carbonyl compounds, infrared spectroscopy reveals a band near 1750 cm−1.Formula: C4H5ClO3

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

《Methyl salicylate glycosides in some Italian varietal wines》 was written by Carlin, Silvia; Masuero, Domenico; Guella, Graziano; Vrhovsek, Urska; Mattivi, Fulvio. Quality Control of Methyl SalicylateThis research focused onwine methyl salicylate glycoside Italy; Verdicchio wine; gaultherin; glycosides; methyl salicylate; methyl salicylate canthoside A; methyl salicylate gentiobioside; methyl salicylate glucoside; methyl salicylate rutinoside; methyl salicylate sambubioside; violutoside. The article conveys some information:

Glycosides are ubiquitous plant secondary metabolites consisting of a non-sugar component called an aglycon, attached to one or more sugars. One of the most interesting aglycons in grapes and wine is Me salicylate (MeSA), an organic ester naturally produced by many plants, particularly wintergreens. To date, nine different MeSA glycosides from plants have been reported, mainly spread over the genera Gaultheria, Camellia, Polygala, Filipendula, and Passiflora. From a sensorial point of view, MeSA has a balsamic-sweet odor, known as Wintergreen. MeSA was found in Vitis riparia grapes, in Vitis vinifera sp. and in the Frontenac interspecific hybrid. We found that the MeSA glycosides content in Verdicchio wines and in some genetically related varieties (Trebbiano di Soave and Trebbiano di Lugana) was very high. In order to understand which glycosides were present in wine, the methanolic extract of Verdicchio wine was injected into a UPLC-Q-TOF-HDMS and compared to the extracts of different plants rich in such glycosides. Using pure standards, we confirmed the existence of two glycosides in wine: MeSA 2-O-β-D-glucoside and MeSA 2-O-β-D-xylopyranosyl (1-6) β-D-glucopyranoside (gaultherin). For the first time, we also tentatively identified other diglycosides in wine: MeSA 2-O-α-L-arabinopyranosyl (1-6)-β-D-glucopyranoside (violutoside) and MeSA 2-O-β-D-apiofuranosyl (1-6)-β-D-glucopyranoside (canthoside A), MeSA 2-O-β-D-glucopyranosyl (1-6)-O-β-D-glucopyranoside (gentiobioside) and MeSA 2-O-α-L-rhamnopyranosyl (1-6)-β-D-glucopyranoside (rutinoside). Some of these glycosides have been isolated from Gaultheria procumbens leaves by preparative liquid chromatog. and structurally annotated by 1H- and 13C-NMR anal. Two of the peaks isolated from Gaultheria procumbens leaves, namely MeSA sambubioside and MeSA sophoroside, were herein observed for the first time. Six MeSA glycosides were quantified in 64 Italian white wines, highlighting the peculiar content and pattern in Verdicchio wines and related cultivars. The total concentration in bound and free MeSA in Verdicchio wines varied in the range of 456-9796μg/L and 5.5-143μg/L, resp., while in the other wines the bound and free MeSA was below 363μg/L and 12μg/L, resp. As this compound’s olfactory threshold is between 50 and 100μg/L, our data support the hypothesis that Me salicylate can contribute to the balsamic scent, especially in old Verdicchio wines. The experimental part of the paper was very detailed, including the reaction process of Methyl Salicylate(cas: 119-36-8Quality Control of Methyl Salicylate)

Methyl Salicylate(cas: 119-36-8) is a natural herbivore-induced plant volatile. It is a naturally occurring product in trees, legumes, exotic plants, vegetables, berries, and the primary constituent of the oil of wintergreen.Methyl Salicylate is produced from salicylic acid.Quality Control of Methyl Salicylate

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

《Characterization of volatile organic compounds emitted from endophytic Burkholderia cenocepacia ETR-B22 by SPME-GC-MS and their inhibitory activity against various plant fungal pathogens》 was written by Chen, Jian-Hua; Xiang, Wei; Cao, Ke-Xin; Lu, Xuan; Yao, Shao-Chang; Ding, Hung; Huang, Rong-Shao; Li, Liang-Bo. Recommanded Product: Methyl SalicylateThis research focused onvolatile organic endophytic burkholderia cenocepacia antifungal biocontrol; Burkholderia cenocepacia; antifungal activity; bacteria; biocontrol agents; volatile organic compounds. The article conveys some information:

The use of antagonistic microorganisms and their volatile organic compounds (VOCs) to control plant fungal pathogens is an eco-friendly and promising substitute for chem. fungicides. In this work, endophytic bacterium ETR-B22, isolated from the root of Sophora tonkinensis Gagnep., was found to exhibit strong antagonistic activity against 12 fungal pathogens found in agriculture. Strain ETR-B22 was identified as Burkholderia cenocepacia based on 16S rRNA and recA sequences. We evaluated the antifungal activity of VOCs emitted by ETR-B22. The VOCs from strain ETR-B22 also showed broad-spectrum antifungal activity against 12 fungal pathogens. The composition of the volatile profiles was analyzed based on headspace solid phase microextraction (HS-SPME) gas chromatog. coupled to mass spectrometry (GC-MS). Different extraction strategies for the SPME process significantly affected the extraction efficiency of the VOCs. Thirty-two different VOCs were identified. Among the VOC of ETR-B22, di-Me trisulfide, indole, Me anthranilate, Me salicylate, Me benzoate, benzyl propionate, benzyl acetate, 3,5-di-tert-butylphenol, allyl benzyl ether and nonanoic acid showed broad-spectrum antifungal activity, and are key inhibitory compounds produced by strain ETR-B22 against various fungal pathogens. Our results suggest that the endophytic strain ETR-B22 and its VOCs have high potential for use as biol. controls of plant fungal pathogens. The results came from multiple reactions, including the reaction of Methyl Salicylate(cas: 119-36-8Recommanded Product: Methyl Salicylate)

Methyl Salicylate(cas: 119-36-8) is a natural herbivore-induced plant volatile. It is a naturally occurring product in trees, legumes, exotic plants, vegetables, berries, and the primary constituent of the oil of wintergreen.Methyl Salicylate is produced from salicylic acid.Recommanded Product: Methyl Salicylate

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

Quality Control of Methyl 3-hydroxypropanoateIn 2020 ,《Solar-Enhanced Plasma-Catalytic Oxidation of Toluene over a Bifunctional Graphene Fin Foam Decorated with Nanofin-like MnO2》 was published in ACS Catalysis. The article was written by Bo, Zheng; Yang, Shiling; Kong, Jing; Zhu, Jinhui; Wang, Yaolin; Yang, Huachao; Li, Xiaodong; Yan, Jianhua; Cen, Kefa; Tu, Xin. The article contains the following contents:

the authors proposed a unique hybrid process combining solar irradiation and post-plasma catalysis (PPC) to effectively oxidize toluene over a stable, highly active MnO2/bifunctional graphene fin foam (GFF) catalyst. the bifunctional GFF, serving as catalyst support and light absorber, was decorated with MnO2 nanofins to form a hierarchical fin-on-fin structure. results showed the MnO2/GFF catalyst effectively captures/converts renewable solar energy into heat (>95% absorption), leading to a temperature rise (55.6°) of the catalyst bed from solar irradiation (1 sun, 1000 W/m2 light intensity). catalyst weight (9.8 mg) was significantly lower (10-100 times lower) than that used in previous studies (usually 100-1000 mg). introducing solar energy into the typical PPC process via solar thermal conversion significantly enhanced toluene conversion and CO2 selectivity (36-63%), reaching ∼93% for toluene conversion and ∼83% for CO2 selectivity at ∼350 J/L specific input energy to remarkably reduce the energy consumption of the plasma-catalytic gas cleaning process. toluene conversion energy efficiency for solar-enhanced post-plasma catalytic (SEPPC) process was up to 12.7 g/kWh, ∼57% higher than that using the PPC process without solar irradiation (8.1 g/kWh); SEPPC process energy consumption was reduced 35-52%. the MnO2/GFF catalyst exhibited excellent self-cleaning induced by solar irradiation, demonstrating superior long-term catalytic stability (72 h at 1 sun), significantly better than that reported in previous work. the prominent synergistic effect of solar irradiation and PPC with a synergistic capacity of ∼42% was mainly attributed to the solar-induced thermal effect on the catalyst bed, boosting O3 decomposition (nearly a three-times enhancement from ∼0.18 gO3/g-hr for PPC to ∼0.52 gO3/g-hr for SEPPC) to generate more oxidative species (e.g., O-) and enhancing on-surface catalytic oxidation as well as the catalyst self-cleaning capacity at solar radiation-induced elevated temperatures this work provides a rational route to use abundant, renewable solar power for high performance, energy-efficient volatile organic compounds removal.Methyl 3-hydroxypropanoate(cas: 6149-41-3Quality Control of Methyl 3-hydroxypropanoate) was used in this study.

Methyl 3-hydroxypropanoate(cas: 6149-41-3) belongs to esters with low molecular weight are commonly used as fragrances and found in essential oils and pheromones. 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. Quality Control of Methyl 3-hydroxypropanoate

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

Reference of tert-Butyl carbamateIn 2021 ,《Asymmetric Total Synthesis of (+)-Quinocarcinamide》 appeared in Organic Letters. The author of the article were Li, Lei; Shi, Li; Wei, Kun; Yang, Yu-Rong. The article conveys some information:

The first asym. total synthesis of (+)-quinocarcinamide I, an enantiomer of the natural oxidation product from antitumor antibiotic (-)-quinocarcin was described. Key steps include an iridium-catalyzed asym. allylic amidation of racemic 1-(2-bromo-6-methoxyphenyl)prop-2-en-1-ol, olefin cross-metathesis followed by a SN2′ to forge tetrahydroisoquinoline II, and stereocontrolled 1,3-dipolar cycloaddition between a facilely generated azomethine ylide IIIand tert-Bu acrylate to construct the diazabicyclo[3.2.1]octane ring IV. In the experimental materials used by the author, we found tert-Butyl carbamate(cas: 4248-19-5Reference of tert-Butyl carbamate)

tert-Butyl carbamate(cas: 4248-19-5) belongs to anime. Nitrous acid converts secondary amines (aliphatic or aromatic) to N-nitroso compounds (nitrosamines): R2NH + HNO2 → R2N―NO. Some nitrosamines are potent cancer-inducing substances, and their possible formation is a serious consideration when nitrites, which are salts of nitrous acid, are present in foods or pharmaceutical preparations. Tertiary amines give rise to nitrosamines more slowly; an alkyl group is eliminated as an aldehyde or ketone, along with nitrous oxide, N2O.Reference of tert-Butyl carbamate

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

In 2022,Liu, Shuai; Zhao, Wenxuan; Li, Jin; Wu, Na; Liu, Chang; Wang, Xin; Li, Shuohao; Zhu, Yan; Liang, Yong; Cheng, Xu published an article in CCS Chemistry. The title of the article was 《Electrochemical aziridination of tetrasubstituted alkenes with ammonia》.SDS of cas: 609-14-3 The author mentioned the following in the article:

Ammonia (NH3) is an ideal nitrogen source in terms of availability, reactivity, safety, atom economy, environmental compatibility, and ease of isolation. However, its utility for amine synthesis is limited by its high bond dissociation energy, its strong coordination ability, and the difference between its reactivity and that of the product amines. Herein, authors reported the first electrochem. protocol for direct syntheses of unprotected tetrasubstituted aziridines with NH3 and alkenes in the absence of an oxidant, which are highly challenging to achieve by other methods. The combination of graphite felt as the anode material and MeOH as the solvent was the key to the success of the protocol, and the effects of these factors were investigated by means of cyclic voltammetry and d. functional theory calculations In the experimental materials used by the author, we found Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3SDS of cas: 609-14-3)

Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3) belongs to ketone compounds. Ketones are highly reactive, although less so than aldehydes, to which they are closely related. Much of their chemical activity results from the nature of the carbonyl group. Ketones readily undergo a wide variety of chemical reactions.SDS of cas: 609-14-3

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