Month: October 2022

Recommanded Product: H-Lys(Boc)-OHOn May 31, 2019, Gless, Bengt H.; Bojer, Martin S.; Peng, Pai; Baldry, Mara; Ingmer, Hanne; Olsen, Christian A. published an article in Nature Chemistry. The article was 《Identification of autoinducing thiodepsipeptides from staphylococci enabled by native chemical ligation》. The article mentions the following:

Staphylococci secrete autoinducing peptides (AIPs) as signaling mols. to regulate population-wide behavior. AIPs from non-Staphylococcusaureus staphylococci have received attention as potential antivirulence agents to inhibit quorum sensing and virulence gene expression in the human pathogen Staphylococcus aureus. However, only a limited number of AIP structures from non-S. aureus staphylococci have been identified to date, as the minute amounts secreted in complex media render it difficult. Here, we report a method for the identification of AIPs by exploiting their thiolactone functionality for chemoselective trapping and enrichment of the compounds from the bacterial supernatant. Standard liquid chromatog. mass spectrometry anal., guided by genome sequencing data, then readily provides the AIP identities. Using this approach, we confirm the identity of five known AIPs and identify the AIPs of eleven non-S. aureus species, and we expect that the method should be extendable to AIP-expressing Gram-pos. bacteria beyond the Staphylococcus genus. In the part of experimental materials, we found many familiar compounds, such as H-Lys(Boc)-OH(cas: 2418-95-3Recommanded Product: H-Lys(Boc)-OH)

H-Lys(Boc)-OH(cas: 2418-95-3) belongs to amino acids. These amino acids may be present in low concentrations and play a vital part as an intermediate in a biosynthetic pathway, e.g., ornithine, homoserine, or cystathionine. In contrast they may act as a major storage form of nitrogen, e.g., canavanine in the seed of Canavalia ensiformis, or may be formed in high amounts in response to an external stress, e.g., γ-aminobutyrate.Recommanded Product: H-Lys(Boc)-OH It is possible that some of these nonprotein amino acids may serve as insecticidal or fungicidal agents.

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

Reference of H-Lys(Boc)-OHOn May 17, 2022 ,《Facile Preparation of Polysaccharide-Polypeptide Conjugates via a Biphasic Solution Ring-Opening Polymerization》 appeared in ACS Macro Letters. The author of the article were Yang, Fangping; Liu, Zhiwei; Si, Wenting; Song, Ziyuan; Yin, Lichen; Tang, Haoyu. The article conveys some information:

Polysaccharide-polypeptide conjugates have gained a broad interest in mimicking the structure and bioactivity of peptidoglycans or proteoglycans for biomedical applications. Efficient and precise preparation of the conjugates is challenging and unresolved, mainly because of the mismatched solubility between polysaccharide initiators and N-carboxyanhydrides (NCAs), which frequently results in competing side reactions and oligomeric polypeptide chain. Herein, we report a facile and efficient strategy to prepare the conjugates with well-controlled polypeptide chain length (lp) directly from unmodified polysaccharides via a biphasic solution ring-opening polymerization The effect of lp on surface antibacterial properties has been investigated. Elongating the lp can significantly potentiate the antibiofilm property of the conjugate coatings. Our results may provide opportunities to develop various polypeptide-based conjugates with well-defined structures toward versatile uses. In the experimental materials used by the author, we found H-Lys(Boc)-OH(cas: 2418-95-3Reference of H-Lys(Boc)-OH)

H-Lys(Boc)-OH(cas: 2418-95-3) belongs to amino acids. Amino acids are not generally considered to be electrochemically active because products of the oxidation accumulate on the electrode surface and prevent it from participating in any further electrochemical processes.Reference of H-Lys(Boc)-OH

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

Synthetic Route of C10H14N2OOn November 8, 2004 ,《Synthesis of optically active ring-A substituted tryptophans as IDO inhibitors》 appeared in Tetrahedron Letters. The author of the article were Li, Xiaoyan; Yin, Wenyuan; Sarma, P. V. V. Srirama; Zhou, Hao; Ma, Jun; Cook, James M.. The article conveys some information:

The first stereoselective synthesis of optically active 6-chloro-L-tryptophan, 5-nitro-D-tryptophan, 6-nitro-D-tryptophan, 5,6-dichloro-L-tryptophan, 6-aza-D-tryptophan, as well as the first synthesis of the optically active 7-methoxy-D-tryptophan with potential activity at IDO (IDO = indoleamine 2,3-dioxygenase) via the Schollkopf chiral auxiliary is described. In addition to this study using 2,2-Dimehtyl-N-pyridin-3-yl-propionamide, there are many other studies that have used 2,2-Dimehtyl-N-pyridin-3-yl-propionamide(cas: 70298-88-3Synthetic Route of C10H14N2O) was used in this study.

2,2-Dimehtyl-N-pyridin-3-yl-propionamide(cas: 70298-88-3) belongs to anime. The reaction of alkyl halides, R―X, where X is a halogen, or analogous reagents with ammonia (or amines) is useful with certain compounds. Not all alkyl halides are effective reagents; the reaction is sluggish with secondary alkyl groups and fails with tertiary ones. Its usefulness is largely confined to primary alkyl halides (those having two hydrogen atoms on the reacting site).Synthetic Route of C10H14N2O

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

Qin, Xudong; Yang, Weiting; Yang, Yonghang; Gu, Dongxu; Guo, Dongyu; Pan, Qinhe published an article in Inorganic Chemistry. The title of the article was 《A zinc metal-organic framework for concurrent adsorption and detection of uranium》.Application of 64479-78-3 The author mentioned the following in the article:

Uranium is one of the principal raw materials in the nuclear industry, but if released into the natural environment, it also poses latent health risks to mankind. Therefore, there is an urgent need to develop a strategy that can concurrently detect and adsorb uranium to realize the sustainable development of nuclear power and protect the environment. In this work, a fluorescent zinc-based metal-organic framework (HNU-50) was designed and synthesized for the effective detection and extraction of U(VI). The amide groups on N-pyridin-4-ylpyridine-4-carboxamide ligands and two uncoordinated carboxyl oxygen atoms on pyromellitic acid ligands in HNU-50 provide potential uranium-binding sites. Consequently, HNU-50 is competent of selectively and efficiently catching uranyl ions, achieving an optimum adsorption capacity of 632 mg/g. Addnl., the adsorption of U(VI) results in fluorescence quenching of HNU-50, thus allowing sensitive and selective detection of U(VI) by fluorescence change. Note that HNU-50 exhibits a considerably low detection limit of 1.2 x 10-8 M for U(VI) in aqueous solution, which is below the World Health Organization maximum pollution standards for potable water (6.3 x 10-8 M). A zinc MOF was successfully constructed by the connection between Zn(II), NPYC, and PMA ligands, which can be used to concurrently detect and adsorb uranium in aqueous solution In addition to this study using N-(Pyridin-4-yl)isonicotinamide, there are many other studies that have used N-(Pyridin-4-yl)isonicotinamide(cas: 64479-78-3Application of 64479-78-3) was used in this study.

N-(Pyridin-4-yl)isonicotinamide(cas: 64479-78-3) belongs to amides.Application of 64479-78-3Amides are pervasive in nature and technology. Proteins and important plastics like Nylons, Aramid, Twaron, and Kevlar are polymers whose units are connected by amide groups (polyamides); these linkages are easily formed, confer structural rigidity, and resist hydrolysis.

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

The author of 《The invention of radical reactions. Part XVIII. A convenient solution to the 1-carbon problem (R-CO2H → R-13CO2H)》 were Barton, Derek H. R.; Ozbalik, Nubar; Vacher, Bernard. And the article was published in Tetrahedron in 1988. Quality Control of 2,2-Dimehtyl-N-pyridin-3-yl-propionamide The author mentioned the following in the article:

Radicals generated by photolysis (W light) of esters derived from N-hydroxy-2-thiopyridone react with electrophilic isocyanides PhCH2CH2NC and (in the presence of CF3CO2H)Me(CH2)4NC to give adducts of type R1N:CRSC5H4N-2 (C5H4N-2 = 2-pyridyl). Convenient reaction procedures have been worked out to hydrolyze the adducts to amides of type RCONHR1, from which the original acid RCO2H can be regenerated under mild conditions. The three important acids oleic, linoleic and arachidonic have all given smooth reactions. In suitable examples, quant. evolution of CO2 and incorporation of 13C without dilution have been demonstrated. This reaction sequence will be useful for the labeling in the carboxyl group of prostaglandins, leukotrienes, and the side chain carboxyls of peptides. The experimental part of the paper was very detailed, including the reaction process of 2,2-Dimehtyl-N-pyridin-3-yl-propionamide(cas: 70298-88-3Quality Control of 2,2-Dimehtyl-N-pyridin-3-yl-propionamide)

2,2-Dimehtyl-N-pyridin-3-yl-propionamide(cas: 70298-88-3) belongs to anime.Typically the presence of an amine functional group is deduced by a combination of techniques, including mass spectrometry as well as NMR and IR spectroscopies. 1H NMR signals for amines disappear upon treatment of the sample with D2O. In their infrared spectrum primary amines exhibit two N-H bands, whereas secondary amines exhibit only one.Quality Control of 2,2-Dimehtyl-N-pyridin-3-yl-propionamide

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

In 2017,Hirai, Toshihiro; Shibata, Kohki; Niwano, Yohei; Shiozaki, Masao; Hashimoto, Yoshimitsu; Morita, Nobuyoshi; Ban, Shintaro; Tamura, Osamu published 《Total synthesis of neodysiherbaine A via 1,3-dipolar cycloaddition of a chiral nitrone template》.Organic Letters published the findings.SDS of cas: 71432-55-8 The information in the text is summarized as follows:

The total synthesis of neodysiherbaine A was achieved via 1,3-dipolar cycloaddition of a chiral nitrone template with a sugar-derived allyl alc. in the presence of MgBr2·OEt2. This cycloaddition constructed the C2 and C4 asym. centers in a single step. Then reductive cleavage, intramol. SN2 reaction of the tertiary alc., and oxidation of the primary alc. afforded neodysiherbaine A. In the part of experimental materials, we found many familiar compounds, such as tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8SDS of cas: 71432-55-8)

tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8) belongs to anime. Amines have a free lone pair with which they can coordinate to metal centers. Amine–metal bonds are weaker because amines are incapable of backbonding, but they are still important for sensing applications.While stronger than hydrogen bonds, amine–metal bonds are still weaker than both covalent and ionic bonds.SDS of cas: 71432-55-8

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

In 2019,Current Organic Synthesis included an article by Zou, Yang; Fei, Jingyi; Chen, Liangzhe; Dong, Qingfeng; Li, Houbin. Electric Literature of C7H9NO2S. The article was titled 《Application of Response Surface Methodology for Improving the Yield of 1,5-bis(ptoluenesulfonyl)- 3,7-Dihydroxyoctahydro-1,5-Diazocine》. The information in the text is summarized as follows:

Background: 3,3,7,7-tetrakis (difluoramino) octahydro-1,5-dinitro-1,5-diazocine (HNFX), as an important oxidizer in propellants, has received much attention due to its high d. and energy. However, there are many difficulties that need to be solved, such as complex synthetic processes, low product yield, high cost of raw materials and complicated purification In the synthesis of HNFX, the intermediate named 1,5-bis (p-toluenesulfonyl)-3,7-dihydroxyoctahydro-1, 5-diazocine (gem-diol), is difficult to synthesize. Methods: A simple method was used to synthesize the gem-diol. This prepared gem-diol was characterized by FT-IR, 1H NMR, m.p. and mass spectrometry. In order to increase the yield of gem-diol, response surface methodol. (RSM) was introduced to optimize exptl. conditions. Results: After the establishment of the model, the optimal conditions of synthesis were found to be 9.33h for reaction time, 6.13wt. % for the concentration of NaOH and 1.38:1 for ratio of ECH (p-toluenesulfonamide): TCA (epichlorohydrin). Under the optimal conditions, the exptl. value and the predicted value of yield were 22.18% and 22.92%, resp. Conclusion: 1,5-bis (p-toluenesulfonyl)-3,7-dihydroxyoctahydro-1,5-diazocine (gem-diol) can be synthesized using the low cost of chem. materials, including p-toluenesulfonamide, epichlorohydrin, sodium hydroxide and ethanol. Response surface methodol. (RSM) is an effective method to optimize the synthesis process, thereby improving the yield of gem-diol. In the part of experimental materials, we found many familiar compounds, such as 4-Methylbenzenesulfonamide(cas: 70-55-3Electric Literature of C7H9NO2S)

4-Methylbenzenesulfonamide(cas: 70-55-3) belongs to anime. Amines can be classified according to the nature and number of substituents on nitrogen. Aliphatic amines contain only H and alkyl substituents. Aromatic amines have the nitrogen atom connected to an aromatic ring.Important amines include amino acids, biogenic amines, trimethylamine, and aniline. Inorganic derivatives of ammonia are also called amines, such as monochloramine (NClH2).Electric Literature of C7H9NO2S

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

《Synergy of activating substrate and introducing C-H···O interaction to achieve Rh2(II)-catalyzed asymmetric cycloisomerization of 1,n-enynes》 was published in Science China: Chemistry in 2020. These research results belong to Wu, Rui; Chen, Kai; Ma, Jun; Yu, Zhi-Xiang; Zhu, Shifa. Formula: C4H9NO2 The article mentions the following:

The first Rh2(II)-catalyzed asym. cycloisomerization of activated enynes was reported to provide cyclopropane-fused tetrahydropyridines I [R = H, Me, CO2Et, Ph, etc.; R1 = H, Me; X = O, NMs, NTs, etc.; n = 1, 2] in good yields and excellent enantioselectivities under mild conditions. The activated group, CHZ (Z was electron-withdrawing group), in the enyne substrates exerted two synergetic roles, one was to activate alkyne for the cyclopropanation reaction and the other was to introduce the C-H···O interaction between substrate and catalyst (reducing the energy barrier of the reaction). This double-mode activation was supported by both d. functional theory calculations and exptl. tests. This strategy was also extended to other CH2Z (Z could be OH, OMe, F) as activating groups that made the CH2 more acidic so that the substrates could also form increased C-H···O interaction with the catalyst. In addition to this study using N-Methoxy-N-methylacetamide, there are many other studies that have used N-Methoxy-N-methylacetamide(cas: 78191-00-1Formula: C4H9NO2) was used in this study.

N-Methoxy-N-methylacetamide(cas: 78191-00-1) belongs to anime. Reaction with nitrous acid (HNO2), which functions as an acylating agent that is a source of the nitrosyl group (―NO), converts aliphatic primary amines to nitrogen and mixtures of alkenes and alcohols corresponding to the alkyl group in a complex process. This reaction has been used for analytical determination of primary amino groups in a procedure known as the Van Slyke method.Formula: C4H9NO2

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

《A highly selective chemical probe for activin receptor-like kinases ALK4 and ALK5》 was written by Hanke, Thomas; Wong, Jong Fu; Berger, Benedict-Tilman; Abdi, Ismahan; Berger, Lena Marie; Tesch, Roberta; Tredup, Claudia; Bullock, Alex N.; Mueller, Susanne; Knapp, Stefan. COA of Formula: C2H4BrNO And the article was included in ACS Chemical Biology in 2020. The article conveys some information:

The transforming growth factor beta-receptor I/activin receptor-like kinase 5 (TGFBR1/ALK5) and its close homolog ALK4 are receptor protein kinases associated with the development of diverse diseases, including cancer, fibrosis, heart diseases, and dysfunctional immune response. Therefore, ALK4/5 are among the most studied kinases, and several inhibitors have been developed. However, current com. available inhibitors either lack selectivity or have not been comprehensively characterized, limiting their value for studying ALK4/5 function in cellular systems. To this end, we report the characterization of the 2-oxo-imidazopyridine, TP-008, a potent chem. probe with dual activity for ALK4 and ALK5 as well as the development of a matching neg. control compound TP-008 has excellent cellular potency and strongly abrogates phosphorylation of the substrate SMAD2 (mothers against decapentaplegic homolog 2). Thus, this chem. probe offers an excellent tool for mechanistic studies on the ALK4/5 signaling pathway and the contribution of these targets to disease. In the part of experimental materials, we found many familiar compounds, such as 2-Bromoacetamide(cas: 683-57-8COA of Formula: C2H4BrNO)

2-Bromoacetamide(cas: 683-57-8) can be used in preparation of (2-carbamoylmethoxy-5-chloro-benzyl)-carbamic acid tert-butyl ester. It was aslo used as precursor to dehydropeptidase I inactivator.COA of Formula: C2H4BrNO

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

Maloney, T. Parker; Dohoda, Alexander F.; Zhu, Alec C.; Michael, Forrest E. published an article in 2022. The article was titled 《Stereoretentive and regioselective selenium-catalyzed intermolecular propargylic C-H amination of alkynes》, and you may find the article in Chemical Science.Formula: C7H9NO2S The information in the text is summarized as follows:

Herein, an intermol. propargylic C-H amination of alkynes was reported. This reaction was operationally convenient and required no transition metal catalysts or additives. Terminal, silyl, and internal alkynes bearing a wide range of functional groups can be aminated in high yields. The regioselectivity of amination for unsym. internal alkynes was strongly influenced by substitution pattern (tertiary > secondary > primary) and by relatively remote heteroat. substituents. The amination of alkynes bearing α-stereocenters occurring with retention of configuration at the newly-formed C-N bond was demonstrated. Competition experiments between alkynes, kinetic isotope effects, and DFT calculations were performed to confirm the mechanistic hypothesis that initial ene reaction of a selenium bis(imide) species is the rate- and product-determining step. This ene reaction has a transition state that results in substantial partial pos. charge development at the carbon atom closer to the amination position. Inductive and/or hyperconjugative stabilization or destabilization of this pos. charge explains the observed regioselectivities. In the experimental materials used by the author, we found 4-Methylbenzenesulfonamide(cas: 70-55-3Formula: C7H9NO2S)

4-Methylbenzenesulfonamide(cas: 70-55-3) belongs to anime. Primary amines having a tertiary alkyl group (R3CNH2) are difficult to prepare with most methods but are made industrially by the Ritter reaction. In this method a tertiary alcohol reacts with hydrogen cyanide (HCN) in the presence of a concentrated strong acid; a formamide, RNH―CHO, is formed first, which then undergoes hydrolysis.Formula: C7H9NO2S

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