Category: amides-buliding-blocks

Day, Christopher R. published the artcileHigh-throughput single-molecule screen for small-molecule perturbation of splicing and transcription kinetics, SDS of cas: 380315-80-0, the publication is Methods (Amsterdam, Netherlands) (2016), 59-68, database is CAplus and MEDLINE.

In eukaryotes, mRNA synthesis is catalyzed by RNA polymerase II and involves several distinct steps, including transcript initiation, elongation, cleavage, and transcript release. Splicing of RNA can occur during (co-transcriptional) or after (post-transcriptional) RNA synthesis. Thus, RNA synthesis and processing occurs through the concerted activity of dozens of enzymes, each of which is potentially susceptible to perturbation by small mols. However, there are few, if any, high-throughput screening strategies for identifying drugs which perturb a specific step in RNA synthesis and processing. Here we have developed a high-throughput fluorescence microscopy approach in single cells to screen for inhibitors of specific enzymic steps in RNA synthesis and processing. By utilizing the high affinity interaction between bacteriophage capsid proteins (MS2, PP7) and RNA stem loops, we are able to fluorescently label the intron and exon of a β-globin reporter gene in human cells. This approach allows one to measure the kinetics of transcription, splicing and release in both fixed and living cells using a tractable, genetically encoded assay in a stable cell line. We tested this reagent in a targeted screen of mols. that target chromatin readers and writers and identified three compounds that slow transcription elongation without changing transcription initiation.

Methods (Amsterdam, Netherlands) published new progress about 380315-80-0. 380315-80-0 belongs to amides-buliding-blocks, auxiliary class Apoptosis,p53, name is N-((4-Acetamidophenyl)carbamothioyl)-4-(tert-butyl)benzamide, and the molecular formula is C20H23N3O2S, SDS of cas: 380315-80-0.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Wang, Bing published the artcileROS-responsive amphiphilic block copolymer-drug conjugate: Design, synthesis and potential as an efficient drug delivery system via a positive feedback strategy, Related Products of amides-buliding-blocks, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2021), 131453, database is CAplus.

Reactive oxygen species (ROS)-responsive drug delivery systems for cancer treatment often suffer insufficient drug release. Herein, we developed a ROS-responsive amphiphilic block copolymer-drug conjugate, TA-CA-Prodrug, based on a pos. feedback strategy to address this issue. Cinnamaldehyde (CA), a ROS-generation agent, was modified as a ROS-responsive linker in the copolymer to connect hydrophilic and hydrophobic segments and conjugate an anti-tumor drug (PTX) to the main copolymeric chain. A pH-sensitive moiety (DPA) was also incorporated to the copolymer. This amphiphilic prodrug self-assembled into micelles at a particle size of around 150 nm with a neg. zeta potential. ROS-responsive release of PTX and CA was confirmed after TA-CA-Prodrug was incubated with H₂O₂, and the drug release rate was dependent on the concentration of H₂O₂. After endocytosis into tumor cells, TA-CA-Prodrug were mainly colocalized with mitochondria owing to the charge reversal after protonation of DPA moieties of TA-CA-Prodrug in an acidic intracellular environment (i.e., pH ≤ 6.2). A relatively high level of ROS around the mitochondria induced simultaneous release of CA and PTX from the prodrug. Then, ROS-generation was triggered by released CA, which in turn enhanced PTX release and PTX-mediated cell cycle arrest, thus resulting in remarkable apoptosis of tumor cells after treatment with TA-CA-Prodrug compared with control groups (TK-Prodrug and Prodrug). Due to a cascaded ROS-feedback strategy, i.v. injection of TA-CA-Prodrug into mice bearing 4 T1 tumors led to a greater tumor inhibition efficacy than control groups, and no obvious side effects were confirmed from negligible changes in body weight as well as H&E stained major organs of mice. Therefore, this block copolymer-drug conjugate could enhance intracellular ROS production for efficient drug release and augment its anti-tumor effect.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 1869-45-0. 1869-45-0 belongs to amides-buliding-blocks, auxiliary class Trifluoromethylated Building Blocks, name is 2,2,2-Trifluoro-N-(2-mercaptoethyl)acetamide, and the molecular formula is C12H10FeO4, Related Products of amides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Wu, Yueming published the artcileSuperfast and Water-Insensitive Polymerization on α-Amino Acid N-Carboxyanhydrides to Prepare Polypeptides Using Tetraalkylammonium Carboxylate as the Initiator, Application In Synthesis of 2418-95-3, the publication is Angewandte Chemie, International Edition (2021), 60(50), 26063-26071, database is CAplus and MEDLINE.

We design the tetraalkylammonium carboxylate-initiated superfast polymerization on α-amino acid N-carboxyanhydrides (NCA) for efficient synthesis of polypeptides. Carboxylates, as a new class of initiator for NCA polymerization, can initiate the superfast NCA polymerization without the need of extra catalysts and the polymerization can be operated in open vessels at ambient condition without the use of glove box. Tetraalkylammonium carboxylate-initiated polymerization on NCA easily affords block copolymers with at least 15 blocks. Moreover, this method avoids tedious purification steps and enables direct polymerization on crude NCAs in aqueous environments to prepare polypeptides and one-pot synthesis of polypeptide nanoparticles. These advantages and the mild polymerization condition of tetraalkylammonium carboxylate-initiated NCA polymerization imply its great potential in functional exploration and application of polypeptides.

Angewandte Chemie, International Edition published new progress about 2418-95-3. 2418-95-3 belongs to amides-buliding-blocks, auxiliary class Chiral,Carboxylic acid,Amine,Aliphatic hydrocarbon chain,Ester,Amino acide derivatives, name is H-Lys(Boc)-OH, and the molecular formula is C5H6BNO2, Application In Synthesis of 2418-95-3.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Ma, Chunying published the artcileA practical and total synthesis of pasireotide: Synthesis of cyclic hexapeptide via a three-component condensation, Synthetic Route of 2418-95-3, the publication is Molecules (2019), 24(11), 2185, database is CAplus and MEDLINE.

Pasireotide is a multi-receptor ligand somatostatin analog approved for medical treatment of Cushing’s disease and acromegaly. The liquid-phase total synthesis of pasireotide-a 18-membered cyclic hexapeptide-was achieved by the 3 + 2 + 1 strategy, and the Pro¹ -Phe⁶ peptide bond was selected as the final cyclization position. Two key fragments were simply synthesized using N,O-bis(trimethylsilyl)acetamide/N-hydroxysuccinimide ester (BSA/NHS) as coupling agents, and processes of the two key fragments were simple without any chromatog. purification The current synthesis method is easily scalable and produces the target peptide with an overall yield of 15%.

Molecules published new progress about 2418-95-3. 2418-95-3 belongs to amides-buliding-blocks, auxiliary class Chiral,Carboxylic acid,Amine,Aliphatic hydrocarbon chain,Ester,Amino acide derivatives, name is H-Lys(Boc)-OH, and the molecular formula is C11H22N2O4, Synthetic Route of 2418-95-3.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Wang, Siqi published the artcilePiPo: random copolymers of C- with N-substituted glycines, Product Details of C11H22N2O4, the publication is Polymer Chemistry (2022), 13(3), 383-387, database is CAplus.

Random copolymers of C- with N-substituted glycines (PiPo) were synthesized by carrying out a statistical copolymerization of N-phenyloxycarbonyl-C-substituted glycine (NPC) monomers with N-phenyloxycarbonyl-N-substituted glycine (NNPC) monomers. The copolymerization kinetics were analyzed in detail. The solubility of PiPo was found to highly depend on the compositions of the peptide and peptoid repeat units.

Polymer Chemistry published new progress about 2418-95-3. 2418-95-3 belongs to amides-buliding-blocks, auxiliary class Chiral,Carboxylic acid,Amine,Aliphatic hydrocarbon chain,Ester,Amino acide derivatives, name is H-Lys(Boc)-OH, and the molecular formula is C8H6ClF3, Product Details of C11H22N2O4.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Meng, Xu published the artcileNBS-mediated aziridination between styrenes and amides under transition metal-free conditions, Product Details of C7H5Cl2NO, the publication is Journal of Heterocyclic Chemistry (2014), 51(4), 937-942, database is CAplus.

An efficient and simple protocol for N-bromosuccinimide (NBS)-mediated aziridination of styrenes using amides as the nitrenoid source was developed. This aziridination affords the desired products in moderate to good yields without using transition metal catalyst under very mild reaction condition.

Journal of Heterocyclic Chemistry published new progress about 2447-79-2. 2447-79-2 belongs to amides-buliding-blocks, auxiliary class Chloride,Amine,Benzene,Amide, name is 2,4-Dichlorobenzamide, and the molecular formula is C7H5Cl2NO, Product Details of C7H5Cl2NO.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Hu, Xiafei published the artcileConstruction of peptide macrocycles via radical-mediated intramolecular C-H alkylations, SDS of cas: 2418-95-3, the publication is Organic Letters (2021), 23(3), 716-721, database is CAplus and MEDLINE.

Enzyme-catalyzed radical-mediated C-H functionalization reactions allow nature to create natural products of unusual three-dimensional structures from simple linear peptide precursors. In comparison, chemist’s ability to harness radical C-H functionalization reactions for synthesis of complex peptides remains limited. In this work, new methods have been developed to construct peptide macrocycles via radical-mediated intramol. C-H alkylation reactions under photoredox catalysis. Linear peptide precursors equipped with a C-terminal N-(acyloxy)phthalimide ester can cyclize with the α C-H bond of N-terminal glycine or aryl C-H bond of N-heteroarene capping units in high yield and selectivity under mild conditions. The strategy uses the C-H cyclization step to incorporate lysine, homolysine, and various heteroarene-derived amino acid linchpins into peptide macrocycles, enabling convergent and flexible synthesis of complex peptide macrocycles from simple building blocks.

Organic Letters published new progress about 2418-95-3. 2418-95-3 belongs to amides-buliding-blocks, auxiliary class Chiral,Carboxylic acid,Amine,Aliphatic hydrocarbon chain,Ester,Amino acide derivatives, name is H-Lys(Boc)-OH, and the molecular formula is C11H22N2O4, SDS of cas: 2418-95-3.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Yang, Jing published the artcileApplicability of Enchytraeus bulbosus as a model species in ecotoxicology and risk assessment, Quality Control of 79-07-2, the publication is Ecotoxicology and Environmental Safety (2021), 112660, database is CAplus and MEDLINE.

Enchytraeus bulbosus is listed in the ISO and OECD standard guidelines as a possible test species of enchytraeid. However, in contrast to other listed species, its applicability in ecotoxicol. studies as well as its sensitivity is widely unknown. Therefore, copper, pentachlorophenol(PCP), carbendazim, and chloroacetamide have been investigated by performing two-generation studies with multiple endpoints. Comparable toxicity trends to the existing studies were shown for copper and PCP in the two-generation studies of E. bulbosus. Dose-related abnormal swelling of clitella were found for the first time with PCP and chloroacetamide treatments. Sensitivity comparisons of E. bulbosus to other terrestrial test species were also conducted. E. bulbosus showed high sensitivity, it has comparable sensitivity as other sensitive species of genus Enchytraeus ( E. albidus or E. luxuriosus)to different chems., and was more sensitive than E. crypticus and earthworm species ( Eisenia fetida or Eisenia andrei). Combined with the phylogenetic and biol. characterization, the results lead to the conclusion that E.bulbosus is a suitable model species in ecotoxicol. and the chem. risk assessment (especially in multi-generation) because it has a short generation time, comparatively moderate fecundity, ideal and reasonable sensitivity.

Ecotoxicology and Environmental Safety published new progress about 79-07-2. 79-07-2 belongs to amides-buliding-blocks, auxiliary class Chloride,Amine,Aliphatic hydrocarbon chain,Amide,Inhibitor, name is 2-Chloroacetamide, and the molecular formula is C4H3Cl2N3, Quality Control of 79-07-2.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Ma, Chao published the artcilePerformance Evaluation of Composite Antisalt Agents and the Antisalt Dynamics Simulation Mechanism, Computed Properties of 79-07-2, the publication is ACS Omega (2022), 7(15), 13075-13082, database is CAplus and MEDLINE.

The conventional ferrocyanide complex ([Fe(CN)₆]^4-) has been widely used as a scale inhibitor under mild conditions, but its oxidation at high temperature compromises the subsequent wastewater treatment processes. To conquer the inadequacies of [Fe(CN)₆]^4-, aminotriacetamide (NTA) was synthesized using chloroacetic acid as an initial material and its mol. structure was characterized using FT-IR spectroscopy, H-NMR, and TGA. NTA was exploited in combination with polyaspartic acid (PASP) and sodium dodecyl benzene sulfonate (SDBS) to prepare a high-performance antisalt composite, and the scaling inhibitor performance was evaluated. The results revealed that as the concentration of the antisalt composite increased from 0.5 to 1.2 weight %, the solubility and inhibition rate increased by 95.6 and 12.33%, resp., at 100°C. The results from mol. simulation evidenced that the order of binding energy between a unit mass of the salt inhibitor and sodium chloride crystal increased in the following order; SDBS > NTA > PASP. The deformation strength between the salt inhibitor and sodium chloride crystal increased as follows: NTA > PASP > SDBS. In addition, the antisalt composite mainly hampered salt precipitation through strong adsorptions arising from both the nitrogen atom of NTA and oxygen atom of SDBS with the sodium atom of sodium chloride crystals, and as a result, it not only altered the crystalline form of sodium chloride but also reduced the adsorption of sodium atoms and eventually improved the salt solubility

ACS Omega published new progress about 79-07-2. 79-07-2 belongs to amides-buliding-blocks, auxiliary class Chloride,Amine,Aliphatic hydrocarbon chain,Amide,Inhibitor, name is 2-Chloroacetamide, and the molecular formula is C2H4ClNO, Computed Properties of 79-07-2.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Qian, Yunkun published the artcileFormation and control of C- and N-DBPs during disinfection of filter backwash and sedimentation sludge water in drinking water treatment, Application In Synthesis of 79-07-2, the publication is Water Research (2021), 116964, database is CAplus and MEDLINE.

Drinking water treatment plants (DWTPs) produce filter backwash water (FBW) and sedimentation sludge water (SSW) that may be partially recycled to the head of DWTPs. The impacts of key disinfection conditions, water quality parameters (e.g., disinfection times, disinfectant types and doses, and pH values), and bromide concentration on controlling the formation of trihalomethanes (THMs), haloacetic acids (HAAs), haloacetonitriles (HANs), and haloacetamides (HAMs) during disinfection of FBW and SSW were investigated. Concentrations of most disinfection byproducts (DBPs) and associated calculated toxicity increased with extended chlorination for both FBW and SSW. During chlorination of both FBW and SSW, elevated chlorine doses significantly increased THM yields per unit dissolved organic carbon (DOC), but decreased HAN and HAM yields, with min. effect on HAA yields. Chloramine disinfection effectively inhibited C-DBP formation but promoted N-DBPs yields, which increased with chloramine dose. Calculated toxicities after chloramination increased with chloramine dose, which was opposite to the trend found after free chlorine addition An examination of pH effects demonstrated that C-DBPs were more readily generated at alk. pH (pH=8), while acidic conditions (pH=6) favored N-DBP formation. Total DBP concentrations increased at higher pH levels, but calculated DBP toxicity deceased due to lower HAN and HAM concentrations Addition of bromide markedly increased bromo-THM and bromo-HAN formation, which are more cytotoxic than chlorinated analogs, but had little impact on the formation of HAAs and HAMs. Bromide incorporation factors (BIFs) for THMs and HANs from both water samples all significantly increased as bromide concentrations increased. Overall, high bromide concentrations increased the calculated toxicity values in FBW and SSW after chlorination. Therefore, while currently challenging, technologies capable of removing bromide should be explored as part of a strategy towards controlling cumulative toxicity burden (i.e., hazard) while simultaneously lowering individual DBP concentrations (i.e., exposure) to manage DBP risks in drinking water.

Water Research published new progress about 79-07-2. 79-07-2 belongs to amides-buliding-blocks, auxiliary class Chloride,Amine,Aliphatic hydrocarbon chain,Amide,Inhibitor, name is 2-Chloroacetamide, and the molecular formula is C2H4ClNO, Application In Synthesis of 79-07-2.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics