Category: amides-buliding-blocks

In 2018,Xin, Bo-Tao; van Tol, Bianca D. M.; Ovaa, Huib; Geurink, Paul P. published 《Native chemical ligation at methionine bioisostere norleucine allows for N-terminal chemical protein ligation》.Organic & Biomolecular Chemistry published the findings.Computed Properties of C11H24N2O The information in the text is summarized as follows:

The development of γ-thionorleucine (ThioNle) as a handle for native chem. ligation-desulfurization is reported here. ThioNle is a new addition to the expanding thiolated amino acid toolbox and serves as a methionine substitute in NCL with the advantage that it lacks the undesirable oxidation-prone thioether moiety. Its usefulness for N-terminal ubiquitination is demonstrated by efficient preparation of fully synthetic linear diubiquitin with preserved protein folding compared to the expressed material. Interestingly, gel-based deubiquitinating assays revealed that the methionine to norleucine substitution did affect diubiquitin cleavage, which may indicate a more profound role for methionine in the interaction between ubiquitin and the deubiquitinating enzymes than has been known so far. In the experiment, the researchers used tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8Computed Properties of C11H24N2O)

tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8) 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.Computed Properties of C11H24N2O

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

In 2017,Li, Wenjing; Yin, Changzhen; Yang, Xiao; Liu, Hailong; Zheng, Xueli; Yuan, Maolin; Li, Ruixiang; Fu, Haiyan; Chen, Hua published 《Cu(II)-Mediated keto C(sp3)-H bond α-acyloxylation of N,N-dialkylamides with aromatic carboxylic acids》.Organic & Biomolecular Chemistry published the findings.Safety of N-Methoxy-N-methylacetamide The information in the text is summarized as follows:

The selective oxidative coupling of aromatic carboxylic acids with the C(sp3)-H bond adjacent to the keto group of alkylamides was developed by employing a low cost copper source. This provides an efficient approach for synthesis of O-benzoylglycolamides. The protocol displayed good functional group tolerance. A broad range of benzoic acids directly coupled with alkylamides to afford a variety of O-benzoylglycolamides in moderate to good yields. In addition, a reasonable radical mechanism was proposed based on EPR experiments In the part of experimental materials, we found many familiar compounds, such as N-Methoxy-N-methylacetamide(cas: 78191-00-1Safety of N-Methoxy-N-methylacetamide)

N-Methoxy-N-methylacetamide(cas: 78191-00-1) 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.Safety of N-Methoxy-N-methylacetamide

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

In 2015,Ikubo, Masaya; Inoue, Asuka; Nakamura, Sho; Jung, Sejin; Sayama, Misa; Otani, Yuko; Uwamizu, Akiharu; Suzuki, Keisuke; Kishi, Takayuki; Shuto, Akira; Ishiguro, Jun; Okudaira, Michiyo; Kano, Kuniyuki; Makide, Kumiko; Aoki, Junken; Ohwada, Tomohiko published 《Structure-Activity Relationships of Lysophosphatidylserine Analogs as Agonists of G-Protein-Coupled Receptors GPR34, P2Y10, and GPR174》.Journal of Medicinal Chemistry published the findings.HPLC of Formula: 71432-55-8 The information in the text is summarized as follows:

Lysophosphatidylserine (LysoPS) is an endogenous lipid mediator generated by hydrolysis of membrane phospholipid phosphatidylserine. Recent ligand screening of orphan G-protein-coupled receptors (GPCRs) identified two LysoPS-specific human GPCRs, namely, P2Y10 (LPS2) and GPR174 (LPS3), which, together with previously reported GPR34 (LPS1), comprise a LysoPS receptor family. Herein, the authors examined the structure-activity relationships of a series of synthetic LysoPS analogs toward these recently deorphanized LysoPS receptors, based on the idea that LysoPS can be regarded as consisting of distinct modules (fatty acid, glycerol, and L-serine) connected by phosphodiester and ester linkages. Starting from the endogenous ligand (1-oleoyl-LysoPS), the authors optimized the structure of each module and the ester linkage. Accordingly, the authors identified some structural requirements of each module for potency and for receptor subtype selectivity. Further assembly of individually structure-optimized modules yielded a series of potent and LysoPS receptor subtype-selective agonists, particularly for P2Y10 and GPR174. In addition to this study using tert-Butyl N,N’-diisopropylcarbamimidate, there are many other studies that have used tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8HPLC of Formula: 71432-55-8) was used in this study.

tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8) belongs to anime. Examples of direct uses of amines and their salts are as corrosion inhibitors in boilers and in lubricating oils (morpholine), as antioxidants for rubber and roofing asphalt (diarylamines), as stabilizers for cellulose nitrate explosives (diphenylamine), as protectants against damage from gamma radiation (diarylamines), as developers in photography (aromatic diamines), as flotation agents in mining, as anticling and waterproofing agents for textiles, as fabric softeners, in paper coating, and for solubilizing herbicides.HPLC of Formula: 71432-55-8

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

In 2014,Starr, Jeremy; Brown, Matthew F.; Aschenbrenner, Lisa; Caspers, Nicole; Che, Ye; Gerstenberger, Brian S.; Huband, Michael; Knafels, John D.; Lemmon, M. Megan; Li, Chao; McCurdy, Sandra P.; McElroy, Eric; Rauckhorst, Mark R.; Tomaras, Andrew P.; Young, Jennifer A.; Zaniewski, Richard P.; Shanmugasundaram, Veerabahu; Han, Seungil published 《Siderophore receptor-mediated uptake of lactivicin analogs in Gram-negative bacteria》.Journal of Medicinal Chemistry published the findings.Reference of tert-Butyl N,N’-diisopropylcarbamimidate The information in the text is summarized as follows:

Multidrug-resistant Gram-neg. pathogens are an emerging threat to human health, and addressing this challenge will require development of new antibacterial agents. This can be achieved through an improved mol. understanding of drug-target interactions combined with enhanced delivery of these agents to the site of action. Here, the authors describe the first application of siderophore receptor-mediated drug uptake of lactivicin analogs as a strategy that enables the development of novel antibacterial agents against clin. relevant Gram-neg. bacteria. They report the first crystal structures of several sideromimic conjugated compounds bound to penicillin binding proteins PBP3 and PBP1a from Pseudomonas aeruginosa and characterize the reactivity of lactivicin and β-lactam core structures. Results from drug sensitivity studies with β-lactamase enzymes are presented, as well as a structure-based hypothesis to reduce susceptibility to this enzyme class. Finally, mechanistic studies demonstrating that sideromimic modification alters the drug uptake process are discussed. In the experiment, the researchers used many compounds, for example, tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8Reference of tert-Butyl N,N’-diisopropylcarbamimidate)

tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8) 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.Reference of tert-Butyl N,N’-diisopropylcarbamimidate

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

《Discovery and characterization of an acridine radical photoreductant》 was written by MacKenzie, Ian A.; Wang, Leifeng; Onuska, Nicholas P. R.; Williams, Olivia F.; Begam, Khadiza; Moran, Andrew M.; Dunietz, Barry D.; Nicewicz, David A.. Formula: C7H9NO2S And the article was included in Nature (London, United Kingdom) in 2020. The article conveys some information:

Photoinduced electron transfer (PET) is a phenomenon whereby the absorption of light by a chem. species provides an energetic driving force for an electron-transfer reaction1-4. This mechanism is relevant in many areas of chem., including the study of natural and artificial photosynthesis, photovoltaics and photosensitive materials. In recent years, research in the area of photoredox catalysis has enabled the use of PET for the catalytic generation of both neutral and charged organic free-radical species. These technologies have enabled previously inaccessible chem. transformations and have been widely used in both academic and industrial settings. Such reactions are often catalyzed by visible-light-absorbing organic mols. or transition-metal complexes of ruthenium, iridium, chromium or copper5,6. Although various closed-shell organic mols. have been shown to behave as competent electron-transfer catalysts in photoredox reactions, there are only limited reports of PET reactions involving neutral organic radicals as excited-state donors or acceptors. This is unsurprising because the lifetimes of doublet excited states of neutral organic radicals are typically several orders of magnitude shorter than the singlet lifetimes of known transition-metal photoredox catalysts7-11. Here we document the discovery, characterization and reactivity of a neutral acridine radical with a maximum excited-state oxidation potential of -3.36 V vs. a SCE, which is similarly reducing to elemental lithium, making this radical one of the most potent chem. reductants reported12. Spectroscopic, computational and chem. studies indicate that the formation of a twisted intramol. charge-transfer species enables the population of higher-energy doublet excited states, leading to the observed potent photoreducing behavior. We demonstrate that this catalytically generated PET catalyst facilitates several chem. reactions that typically require alkali metal reductants and can be used in other organic transformations that require dissolving metal reductants. After reading the article, we found that the author used 4-Methylbenzenesulfonamide(cas: 70-55-3Formula: C7H9NO2S)

4-Methylbenzenesulfonamide(cas: 70-55-3) 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.Formula: C7H9NO2S

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

《Ammonia-Mediated Bromate Inhibition during Ozonation Promotes the Toxicity Due to Organic Byproduct Transformation》 was published in Environmental Science & Technology in 2020. These research results belong to Wu, Qian-Yuan; Yang, Lu-Lin; Zhang, Xin-Yang; Wang, Wen-Long; Lu, Yao; Du, Ye; Lu, Yun; Hu, Hong-Ying. Recommanded Product: 2-Bromoacetamide The article mentions the following:

Ammonia (NH4+) and hydrogen peroxide (H2O2) have been widely used to inhibit bromate formation during ozonization. However, organic byproducts can also pose a risk under these conditions. During bromate inhibition, the influence of NH4+ and H2O2 on organic byproducts and their toxicity should be elucidated. Our study found that NH4+ suppressed organic bromine, but might result in increased toxicity. Adding 0.5 mg/L of NH4+-N substantially increased both the formation of cytotoxicity and genotoxicity (DNA double-strand breaks) of organic byproducts from 0.6 to 1.6 mg-phenol/L, and from 0.3 to 0.8μg-4-NQO/L (0.5 mg/L Br-, 5 mg/L O3). NH4+ decreased bromate, but increased the overall toxicity of the integrated byproducts (organic byproducts and bromate). Organic nitrogen measurements and 15N isotope anal. showed enhanced incorporation of nitrogen into organic matter when NH4+ and Br- coexisted during ozonization. NH4+ decreased the formation of brominated acetonitriles, but enhanced the formation of brominated nitromethanes and brominated acetamides. These brominated nitrogenous byproducts were partially responsible for this increase in toxicity. Different from ammonia, H2O2 could reduce both bromate and the toxicity of organic byproducts. In the presence of 0.5 mg/L Br- and 10 mg/L O3, adding H2O2 (0.5 mM) substantially suppressed bromate, cytotoxicity formation and genotoxicity formation by 88%, 63% and 67%. This study highlights that focusing on bromate control with NH4+ addition might result in higher toxicity. Efforts are needed to effectively control the toxicities of bromate and organic byproducts simultaneously. After reading the article, we found that the author used 2-Bromoacetamide(cas: 683-57-8Recommanded Product: 2-Bromoacetamide)

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.Recommanded Product: 2-Bromoacetamide

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

In 2019,Asian Journal of Organic Chemistry included an article by Paul, Dipankar; Borah, Apurba; Khatua, Snehadrinarayan; Nath Chatterjee, Paresh. Computed Properties of C7H9NO2S. The article was titled 《para-Toluenesulfonic Acid-Catalyzed, Ultrasound-Promoted, One-Pot, Three-Component Coupling of Aldehydes, -Dicarbonyls/Amides and Electron-Rich Arenes》. The information in the text is summarized as follows:

An ultrasound-promoted, metal-free method for the three-component coupling of aldehydes, β-dicarbonyls/amides and electron-rich arenes was reported. The versatility of the method was established by employing varieties of functionally diverse components for coupling. In lieu of expensive, toxic or specifically designed catalysts, the method presented employed com. available, inexpensive and non-toxic para-toluenesulfonic acid monohydrate (pTSA) as an efficient catalyst. An insight into the mechanistic pathway of the three-component coupling reaction was also provided by isolating the intermediate and subsequently converting it to the final product. The flexibility of choosing the components in the method described allowed one-pot access to a variety of relevant organic motifs. In the experiment, the researchers used many compounds, for example, 4-Methylbenzenesulfonamide(cas: 70-55-3Computed Properties of C7H9NO2S)

4-Methylbenzenesulfonamide(cas: 70-55-3) belongs to anime. In organic chemistry, amines are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (NH3), wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines in which both types of substituent are attached to one nitrogen atom may be called alkylarylamines).Computed Properties of C7H9NO2S

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

In 2019,Bioorganic & Medicinal Chemistry included an article by de Heuvel, Erik; Singh, Abhimanyu K.; Edink, Ewald; van der Meer, Tiffany; van der Woude, Melanie; Sadek, Payman; Krell-Joergensen, Mikkel P.; van den Bergh, Toine; Veerman, Johan; Caljon, Guy; Kalejaiye, Titilola D.; Wijtmans, Maikel; Maes, Louis; de Koning, Harry P.; Jan Sterk, Geert; Siderius, Marco; de Esch, Iwan J. P.; Brown, David G.; Leurs, Rob. Application In Synthesis of 2-Bromoacetamide. The article was titled 《Alkynamide phthalazinones as a new class of TbrPDEB1 inhibitors》. The information in the text is summarized as follows:

Several 3′,5′-cyclic nucleotide phosphodiesterases (PDEs) have been validated as good drug targets for a large variety of diseases. Trypanosoma brucei PDEB1 (TbrPDEB1) has been designated as a promising drug target for the treatment of human African trypanosomiasis. Recently, the first class of selective nanomolar TbrPDEB1 inhibitors was obtained by targeting the parasite specific P-pocket. However, these biphenyl-substituted tetrahydrophthalazinone-based inhibitors did not show potent cellular activity against Trypanosoma brucei (T. brucei) parasites, leaving room for further optimization. Herein, we report the discovery of a new class of potent TbrPDEB1 inhibitors that display improved activities against T. brucei parasites. Exploring different linkers between the reported tetrahydrophthalazinone core scaffold and the amide tail group resulted in the discovery of alkynamide phthalazinones as new TbrPDEB1 inhibitors, which exhibit submicromolar activities vs. T. brucei parasites and no cytotoxicity to human MRC-5 cells. Elucidation of the crystal structure of alkynamide 8b (NPD-048) bound to the catalytic domain of TbrPDEB1 shows a bidentate interaction with the key-residue Gln874 and good directionality towards the P-pocket. Incubation of trypanosomes with alkynamide 8b results in an increase of intracellular cAMP, validating a PDE-mediated effect in vitro and providing a new interesting compound series for further studies towards selective TbrPDEB1 inhibitors with potent phenotypic activity. After reading the article, we found that the author used 2-Bromoacetamide(cas: 683-57-8Application In Synthesis of 2-Bromoacetamide)

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.Application In Synthesis of 2-Bromoacetamide

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

In 2012,Oohara, Tadashi; Nambu, Hisanori; Anada, Masahiro; Takeda, Koji; Hashimoto, Shunichi published 《A polymer-supported chiral fluorinated dirhodium(II) complex for asymmetric amination of silyl enol ethers》.Advanced Synthesis & Catalysis published the findings.COA of Formula: C11H24N2O The information in the text is summarized as follows:

The immobilization of dirhodium(II) tetrakis[N-tetrafluorophthaloyl-(S)-tert-leucinate], [Rh2(S-TFPTTL)4], has been accomplished by copolymerization of a dirhodium(II) complex-containing monomer with styrene and 1,6-bis(4-vinylbenzyloxy)hexane as a flexible cross-linker. The polymer-supported chiral fluorinated dirhodium(II) complex catalyzed the amination of silyl enol ethers with [N-(2-nitrophenylsulfonyl)imino]phenyliodinane (NsN=IPh) to provide α-amino ketones in high yields with high levels of enantioselectivity and could be used up to 20 times as the catalyst readily withstood stirring in the presence of the solid reactant. In the part of experimental materials, we found many familiar compounds, such as tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8COA of Formula: C11H24N2O)

tert-Butyl N,N’-diisopropylcarbamimidate(cas: 71432-55-8) belongs to anime. In organic chemistry, amines are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (NH3), wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines in which both types of substituent are attached to one nitrogen atom may be called alkylarylamines).COA of Formula: C11H24N2O

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

The author of 《NIPAm-Based Modification of Poly(L-lysine): A pH-Dependent LCST-Type Thermo-Responsive Biodegradable Polymer》 were Stamou, Aggeliki; Iatrou, Hermis; Tsitsilianis, Constantinos. And the article was published in Polymers (Basel, Switzerland) in 2022. Formula: C11H22N2O4 The author mentioned the following in the article:

Polylysine is a biocompatible, biodegradable, water soluble polypeptide. Thanks to the pendant primary amines it bears, it is susceptible to modification reactions. In this work Poly(L-lysine) (PLL) was partially modified via the effortless free-catalyzed aza-Michael addition reaction at room temperature by grafting N-isopropylacrylamide (NIPAm) moieties onto the amines. The resulting PLL-g-NIPAm exhibited LCST-type thermosensitivity. The LCST can be tuned by the NIPAm content incorporated in the macromols. Importantly, depending on the NIPAm content, LCST is highly dependent on pH and ionic strength due to ionization capability of the remaining free lysine residues. PLL-g-NIPAm constitutes a novel biodegradable LCST polymer that could be used as “”smart”” block in block copolymers and/or terpolymers, of any macromol. architecture, to design pH/Temperature-responsive self-assemblies (nanocarriers and/or networks) for potential bio-applications. In the part of experimental materials, we found many familiar compounds, such as H-Lys(Boc)-OH(cas: 2418-95-3Formula: C11H22N2O4)

H-Lys(Boc)-OH(cas: 2418-95-3) belongs to amino acids. In addition to subunits of proteins, amino acids have many other functions as well, including osmoregulation (proline), neurotransmitters (gamma-aminobutyric acid), metabolic intermediates (ornithine and citrulline), and inhibitors (dehydroproline).Formula: C11H22N2O4

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