Category: amides-buliding-blocks

On March 29, 2019, Horner, Anthony R.; Wilson, Rachael E.; Groskreutz, Stephen R.; Murray, Bridget E.; Weber, Stephen G. published an article.COA of Formula: C10H11NO3 The title of the article was Evaluation of three temperature- and mobile phase-dependent retention models for reversed-phase liquid chromatographic retention and apparent retention enthalpy. And the article contained the following:

Predicting retention and enthalpy allows for the simulation and optimization of advanced chromatog. techniques including gradient separations, temperature-assisted solute focusing, multidimensional liquid chromatog., and solvent focusing. In this paper we explore the fits of three expressions for retention as a function of mobile phase composition and temperature to retention data of 101 small mols. in reversed phase liquid chromatog. The three retention equations investigated are those by Neue and Kuss (NK) and two different equations by Pappa-Louisi et al., one based on a partition model (PL-P) and one based on an adsorption model (PL-A). More than 25,000 retention factors were determined for 101 small mols. under various mobile phase and temperature conditions. The pure exptl. uncertainty is very small, approx. 0.22% uncertainty in retention factors measured on the same day (2.1% when performed on different days). Each of the three equations for ln(k) was fit to the exptl. data based on a least-squares approach and the results were analyzed using lack-of-fit residuals. The PL-A model, while complex, gives the best overall fits. In addition to examining the equations’ adequacy for retention, we also examined their use for apparent retention enthalpy. This enthalpy can be predicted by taking the derivative of these expressions with respect to the inverse of absolute temperature The numerical values of the fitted parameters based on retention data can then be used to predict retention enthalpy. These enthalpy predictions were compared to those obtained from a modified van ‘t Hoff equation that included a quadratic term in inverse temperature Based on anal. of 1 211 van ‘t Hoff plots (solute-mobile phase-day combinations), ninety-eight percent showed a significantly better fit when using the modified van ‘t Hoff expression, justifying its use to provide apparent enthalpies as a function of mobile phase composition and temperature The foregoing apparent enthalpies were compared to the apparent enthalpies predicted by the three models. The PL-A model, which contains a temperature dependent enthalpy, provided the best enthalpy prediction. However, there is virtually no correlation between the overall lack of fit to exptl. ln(k) for each model and the corresponding lack of fit of the linear (in 1/T) van ‘t Hoff expression. Thus, the temperature-dependent enthalpy is apparently not the cause of a model’s ability to fit ln(k) as a function of mobile phase composition and temperature The value in these expressions is their ability to predict chromatograms, allowing for optimization of an advanced chromatog. technique. The two simpler models NK and PL-P, which do not contain a temperature dependent enthalpy, have their merits in modeling retention (NK being the better of the two) and enthalpy (PL-P being the better of the two) if a simpler expression is required for a given application. The experimental process involved the reaction of 2-(4-Methylbenzamido)acetic acid(cas: 27115-50-0).COA of Formula: C10H11NO3

The Article related to reversed phase liquid chromatog retention model enthalpy, chromatographic simulation, liquid chromatography, mobile phase composition dependence, retention enthalpy, retention models, temperature dependence and other aspects.COA of Formula: C10H11NO3

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

On July 9, 2009, De Vries, Andreas Hendrikus Maria; Domin, Doris; Helms, Matthias; Imboden, Christoph; Koberstein, Ralf; Nazir, Zarghun; Skranc, Wolfgang; Stanek, Michael; Tschebull, Wilhelm; Verzijl, Gerardus Karel Maria published a patent.Synthetic Route of 65645-88-7 The title of the patent was Process for preparation of (S)-6,7-dimethoxy-1-[2-(4-trifluoromethylphenyl)ethyl]-1,2,3,4-tetrahydro-1H-isoquinoline acetate via asymmetric hydrogenation. And the patent contained the following:

(S)-6,7-dimethoxy-1-[2-(4-trifluoromethylphenyl)ethyl]-1,2,3,4-tetrahydro-1H-isoquinoline acetate was prepared via asym. hydrogenation of 6,7-dimethoxy-1-[2-(4-trifluoromethylphenyl)ethyl]-3,4-dihydro-1H-isoquinoline in the presence of bis(chloro-1,5-cyclooctadieneiridium), (S)-1-dicyclohexylphosphino-2-[(S)-α-(dimethylamino)-2-(dicyclohexylphosphino)benzyl]ferrocene, iodine, and a solvent under 1-200 bar H2. The above reaction was carried out at 5 bar H2 and 30° in CH2Cl2 with a I2/Ir ratio of 2:1 to give the title product in 95% enantiomeric excess with 100% conversion. The experimental process involved the reaction of (S)-2-Hydroxy-N-methyl-2-phenylacetamide(cas: 65645-88-7).Synthetic Route of 65645-88-7

The Article related to phenethyldihydroisoquinoline asym hydrogenation iridium phosphinoferrocene catalyst, methoxytrifluoromethylphenylethyltetrahydroisoquinoline acetate chiral preparation, almorexant hydrochloride preparation and other aspects.Synthetic Route of 65645-88-7

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

On June 30, 2022, Liu, Junwei; Bao, Yixuan; Zhang, Xuan; Zhao, Shiyu; Qiu, Jiguo; Li, Na; He, Jian published an article.Reference of 2-Chloroacetamide The title of the article was Anaerobic biodegradation and detoxification of chloroacetamide herbicides by a novel Proteiniclasticum sediminis BAD-10T. And the article contained the following:

Chloroacetamide herbicides (CAAHs) are important herbicides that were widely used to control agricultural weeds. However, their mass applications have seriously contaminated environment, and they are toxic to living beings. CAAHs are easy to enter anoxic environments such as subsoil, wetland sediment, and groundwater, where CAAHs are mainly degraded by anaerobic organisms. To date, there are no research on the anaerobic degradation of CAAHs by pure isolate and toxicity of anaerobic metabolites of CAAHs. In this study, the anaerobic degradation kinetics and metabolites of CAAHs by an anaerobic isolate BAD-10T and the toxicity of anaerobic metabolites were studied. Isolate BAD-10T could degrade alachlor, acetochlor, propisochlor, butachlor, pretilachlor and metolachlor with the degradation kinetics fitting the pseudo-first-order kinetics equation. The degradation rates of CAAHs were significantly affected by the length of N-alkoxyalkyl groups, the shorter the N-alkoxyalkyl groups, the higher the degradation rates. Four metabolites 2-ethyl-6-methyl-N-(ethoxymethyl)-acetanilide (EMEMA), N-(2-methyl-6-ethylphenyl)-acetamide (MEPA), N-2-ethylphenyl acetamide and 2-ethyl-N-carboxyl aniline were identified during acetochlor degradation, and an anaerobic catabolic pathway of acetochlor was proposed. The toxicity of EMEMA and EMPA for zebrafish, Arabidopsis and Chlorella ellipsoidea were obviously lower than that of acetochlor, indicating that the anaerobic degradation of acetochlor by isolate BAD-10T is a detoxification process. The work reveals the anaerobic degradation kinetics and catabolic pathway of CAAHs and highlights a potential application of Proteiniclasticum sediminis BAD-10T for bioremediation of CAAHs residue-contaminated environment. The experimental process involved the reaction of 2-Chloroacetamide(cas: 79-07-2).Reference of 2-Chloroacetamide

The Article related to chloroacetamide herbicide anaerobic biodegradation detoxification, acetochlor, anaerobic biodegradation, catabolic pathway, chloroacetamide herbicides, detoxification, proteiniclasticum sediminis bad-10(t) and other aspects.Reference of 2-Chloroacetamide

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

On February 5, 2021, Nanda, Tanmayee; Biswal, Pragati; Pati, Bedadyuti Vedvyas; Banjare, Shyam Kumar; Ravikumar, Ponneri Chandrababu published an article.Formula: C13H12N2O The title of the article was Palladium-Catalyzed C-C Bond Activation of Cyclopropenone: Modular Access to Trisubstituted α,β-Unsaturated Esters and Amides. And the article contained the following:

Strain-driven palladium/N-heterocyclic carbene-catalyzed C-C bond activation of diphenylcyclopropenone (DPC) was explored for one-step access to trisubstituted α,β-unsaturated esters and amides. The designed transformation worked under mild conditions providing exclusively a single stereoisomer. Mechanistic studies support the oxidative addition of the C-C bond of cyclopropenone to in-situ-generated Pd(0) intermediate. Vinylic hydrogen in the product was proved that it is coming from phenol/aniline through deuterium-labeling studies. Late-stage functionalization of bioactive mols. such as procaine, estrone, and hymecromone demonstrated the robustness of this protocol. The experimental process involved the reaction of 1,3-Diphenylurea(cas: 102-07-8).Formula: C13H12N2O

The Article related to trisubstituted unsaturated ester preparation, phenol cyclopropenone bond activation palladium catalyst, amide trisubstituted unsaturated preparation, amine cyclopropenone bond activation palladium catalyst and other aspects.Formula: C13H12N2O

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

On October 25, 2007, Kansal, Kinod Kumar; Ahmad, Suhail; Mariappan, Shanmugavel; Tyagi, Bhupendra; Perlman, Nurit; Le Paih, Jacques; Zanotti-Gerosa, Antonio published a patent.Recommanded Product: N-[(1S,2S)-2-Amino-1,2-diphenylethyl]-1,1,1-trifluoromethanesulfonamide The title of the patent was Processes for the synthesis of azetidinone. And the patent contained the following:

Provided were intermediates useful for the synthesis of hydroxyl-alkyl substituted azetidinones, processes of their preparation and processes for the synthesis of certain hydroxyl-alkyl substituted azetidinones. Also provided were processes for the synthesis of 1-(4-fluorophenyl)-3(R)-[3-(4-fluorophenyl)-3(S)-hydroxypropyl]-4(S)-(4-hydroxyphenyl)-2-azetidinone, or ezetimibe (I). The experimental process involved the reaction of N-[(1S,2S)-2-Amino-1,2-diphenylethyl]-1,1,1-trifluoromethanesulfonamide(cas: 167316-28-1).Recommanded Product: N-[(1S,2S)-2-Amino-1,2-diphenylethyl]-1,1,1-trifluoromethanesulfonamide

The Article related to azetidinone ezetimibe analog preparation drug delivery system, cholesterol absorption inhibitor azetidinone ezetimibe analog preparation, stereoselective reduction ruthenium catalyst ezetimibe preparation and other aspects.Recommanded Product: N-[(1S,2S)-2-Amino-1,2-diphenylethyl]-1,1,1-trifluoromethanesulfonamide

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

On January 4, 2002, Taran, Frederic; Gauchet, Cecile; Mohar, Barbara; Meunier, Stephane; Valleix, Alain; Renard, Pierre Yves; Creminon, Christophe; Grassi, Jacques; Wagner, Alain; Mioskowski, Charles published an article.Reference of N-[(1S,2S)-2-Amino-1,2-diphenylethyl]-1,1,1-trifluoromethanesulfonamide The title of the article was Communications: High-throughput screening of enantioselective catalysts by immunoassay. And the article contained the following:

Immunoassay techniques are demonstrated for anal. of catalytic activity of a combinatorial library of enantioselective reduction catalysts. By using an antibody that binds indiscriminately to the two enantiomers of the reduction product, the yield of the reaction can be calculated, and subsequently employing an enantiospecific antibody the enantiomeric excess can be determined This method was demonstrated on a combinatorial library of reduction catalyst prepared by combining a set of 22 chiral diamine-based ligands, e.g., I, with four different metal species. As a model reaction, the enantioselective reduction of benzoyl formic acid to (S)-mandelic acid was studied identifying the optimal catalyst as a combination of [RuCl2(p-cym)]2 with the chiral diamine ligand I. The experimental process involved the reaction of N-[(1S,2S)-2-Amino-1,2-diphenylethyl]-1,1,1-trifluoromethanesulfonamide(cas: 167316-28-1).Reference of N-[(1S,2S)-2-Amino-1,2-diphenylethyl]-1,1,1-trifluoromethanesulfonamide

The Article related to combinatorial library enantioselective reduction catalyst, high throughput immunoassay screening catalyst library, benzoyl formic acid enantioselective reduction, mandelic acid stereoselective preparation and other aspects.Reference of N-[(1S,2S)-2-Amino-1,2-diphenylethyl]-1,1,1-trifluoromethanesulfonamide

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

Xu, Shibo; Takamatsu, Kazutaka; Hirano, Koji; Miura, Masahiro published an article in 2018, the title of the article was Nickel-Catalyzed Stereospecific C-H Coupling of Benzamides with Epoxides.Name: 2-(Oxiran-2-ylmethyl)isoindoline-1,3-dione And the article contains the following content:

A Ni(OAc)2-catalyzed C-H coupling of 8-aminoquinoline-derived benzamides with epoxides has been developed. The reaction proceeds with concomitant removal of the 8-aminoquinoline auxiliary to form the corresponding 3,4-dihydroisocoumarins directly. Addnl., the nickel catalysis is stereospecific, and the cis- and trans-epoxides are converted into the corresponding cis- and trans-dihydroisocoumarins with retention of configuration, which is complementary to previously reported palladium catalysis. Moreover, while still preliminary, the Csp3-H functionalization is also achieved in the presence of modified NiCl2 catalysts. The experimental process involved the reaction of 2-(Oxiran-2-ylmethyl)isoindoline-1,3-dione(cas: 5455-98-1).Name: 2-(Oxiran-2-ylmethyl)isoindoline-1,3-dione

The Article related to aminoquinoline benzamide epoxide nickel stereospecific coupling catalyst microwave irradiation, dihydroisocoumarin stereoselective preparation, c−h coupling, epoxides, lactones, nickel, stereospecificity and other aspects.Name: 2-(Oxiran-2-ylmethyl)isoindoline-1,3-dione

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

On November 1, 2017, Kumar, Prashant; Takayesu, Allen; Abbasi, Usama; Kalathottukaren, Manu Thomas; Abbina, Srinivas; Kizhakkedathu, Jayachandran N.; Straus, Suzana K. published an article.Category: amides-buliding-blocks The title of the article was Antimicrobial peptide-polymer conjugates with high activity: Influence of polymer molecular weight and peptide sequence on antimicrobial activity, proteolysis, and biocompatibility. And the article contained the following:

We report the synthesis, characterization, activity, and biocompatibility of a novel series of antimicrobial peptide-polymer conjugates. Using parent peptide aurein 2.2, we designed a peptide array (∼100 peptides) with single and multiple W and R mutations and identified antimicrobial peptides (AMPs) with potent activity against Staphylococcus aureus (S. aureus). These novel AMPs were conjugated to hyperbranched polyglycerols (HPGs) of different mol. weights and number of peptides to improve their antimicrobial activity and toxicity. The cell and blood compatibility studies of these conjugates demonstrated better properties than those of the AMP alone. However, conjugates showed lower antimicrobial activity in comparison to that of peptides, as determined from minimal inhibition concentrations (MICs) against S. aureus, but considerably better than that of the available polymer-AMP conjugates in the literature. In addition to measuring MICs and characterizing the biocompatibility, CD spectroscopy was used to investigate the interaction of the novel conjugates with model bacterial biomembranes. Moreover, the novel conjugates were exposed to trypsin to evaluate their stability. It was found that the conjugates resist proteolysis in comparison with unprotected peptides. The peptide conjugates were active in serum and whole blood. Overall, the results show that combining a highly active AMP and low-mol.-weight HPG yields bioconjugates with excellent biocompatibility, MICs below 100 μg/mL, and proteolytic stability, which could potentially improve its utility for in vivo applications. The experimental process involved the reaction of 2-(Oxiran-2-ylmethyl)isoindoline-1,3-dione(cas: 5455-98-1).Category: amides-buliding-blocks

The Article related to antimicrobial peptide polymer conjugate proteolysis biocompatibility, hyperbranched polyglycerol, antimicrobial peptide−polymer conjugates, aurein peptides, biocompatibility, bioconjugation, proteolysis and other aspects.Category: amides-buliding-blocks

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

On December 1, 2020, Verdugo, Edgard M.; Gifford, Mac; Glover, Caitlin; Cuthbertson, Amy A.; Trenholm, Rebecca A.; Kimura, Susana Y.; Liberatore, Hannah K.; Richardson, Susan D.; Stanford, Benjamin D.; Summers, R. Scott; Dickenson, Eric R. V. published an article.Application of 79-07-2 The title of the article was Controlling disinfection byproducts from treated wastewater using adsorption with granular activated carbon: Impact of pre-ozonation and pre-chlorination. And the article contained the following:

This study measured chlorine- and chloramine-reactive precursors using formation potential (FP) tests of nine U. S. Environmental Protection Agency (EPA) regulated and 57 unregulated disinfection byproducts (DBPs) in tertiary-filtered wastewater before and after pilot-scale granular activated carbon (GAC) adsorption. Using breakthrough of precursor concentration and of concentration associated calculated cytotoxicity and genotoxicity (by correlating known lethal concentrations reported elsewhere), the performance of three parallel GAC treatment trains were compared against tertiary-filtered wastewater: ozone/GAC, chlorine/GAC, and GAC alone. Results show GAC alone was the primary process, vs. ozone or chlorine alone, to remove the largest fraction of total chlorine- and chloramine-reactive DBP precursors and calculated cytotoxicity and genotoxicity potencies. GAC with pre-ozonation removed the most chlorine- and chloramine-reactive DBP precursors followed by GAC with pre-chlorination and lastly GAC without pre-treatment. GAC with pre-ozonation produced an effluent with cytotoxicity and genotoxicity of DBPs from FP that generally matched that of GAC without pre-oxidation; meanwhile removal of toxicity was greater by GAC with pre-chlorination. The cytotoxicity and genotoxicity of DBPs from FP tests did not scale with DBP concentration; for example, more than 90% of the calculated cytotoxicity resulted from 20% of the DBPs, principally from haloacetaldehydes, haloacetamides, and haloacetonitriles. The calculated cytotoxicity and genotoxicity from DBPs associated with FP-chloramination were at times higher than with FP-chlorination though the concentration of DBPs was five times higher with FP-chlorination. The removal of DBP precursors using GAC based treatment was at least as effective as removal of DOC (except for halonitromethanes for GAC without pre-oxidation and with pre-chlorination), indicating DOC can be used as an indicator for DBP precursor adsorption efficacy. However, the DOC was not a good surrogate for total cytotoxicity and genotoxicity breakthrough behavior, therefore, unregulated DBPs could have neg. health implications that are disconnected from general water quality parameters, such as DOC, and regulated classes of DBPs. Instead, cytotoxicity and genotoxicity correlate with the concentration of specific classes of unregulated DBPs. The experimental process involved the reaction of 2-Chloroacetamide(cas: 79-07-2).Application of 79-07-2

The Article related to carbon pre ozonation chlorination cytotoxicity adsorption, chlorine and chloramine disinfection byproducts, cytotoxicity, genotoxicity, granular activated carbon adsorption, potable reuse, preoxidation and other aspects.Application of 79-07-2

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

On August 20, 2020, Vinogradova, Ekaterina V.; Zhang, Xiaoyu; Remillard, David; Lazar, Daniel C.; Suciu, Radu M.; Wang, Yujia; Bianco, Giulia; Yamashita, Yu; Crowley, Vincent M.; Schafroth, Michael A.; Yokoyama, Minoru; Konrad, David B.; Lum, Kenneth M.; Simon, Gabriel M.; Kemper, Esther K.; Lazear, Michael R.; Yin, Sifei; Blewett, Megan M.; Dix, Melissa M.; Nguyen, Nhan; Shokhirev, Maxim N.; Chin, Emily N.; Lairson, Luke L.; Melillo, Bruno; Schreiber, Stuart L.; Forli, Stefano; Teijaro, John R.; Cravatt, Benjamin F. published an article.Application of 79-07-2 The title of the article was An Activity-Guided Map of Electrophile-Cysteine Interactions in Primary Human T Cells. And the article contained the following:

Electrophilic compounds originating from nature or chem. synthesis have profound effects on immune cells. These compounds are thought to act by cysteine modification to alter the functions of immune-relevant proteins; however, our understanding of electrophile-sensitive cysteines in the human immune proteome remains limited. Here, we present a global map of cysteines in primary human T cells that are susceptible to covalent modification by electrophilic small mols. More than 3,000 covalently liganded cysteines were found on functionally and structurally diverse proteins, including many that play fundamental roles in immunol. We further show that electrophilic compounds can impair T cell activation by distinct mechanisms involving the direct functional perturbation and/or degradation of proteins. Our findings reveal a rich content of ligandable cysteines in human T cells and point to electrophilic small mols. as a fertile source for chem. probes and ultimately therapeutics that modulate immunol. processes and their associated disorders. The experimental process involved the reaction of 2-Chloroacetamide(cas: 79-07-2).Application of 79-07-2

The Article related to electrophile cysteine interaction primary human t cell immunol, birc3, itk, t cells, activity-based protein profiling, chemical proteomics, covalent, cysteine, electrophiles, human, protein degradation and other aspects.Application of 79-07-2

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