amides-buliding-blocks Archives - Page 457 of 1299

Wu, Yue-Ming’s team published research in Chinese Journal of Polymer Science in 2020 | CAS: 2418-95-3

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.

Recommanded Product: H-Lys(Boc)-OHOn October 31, 2020 ,《Facile synthesis of high molecular weight polypeptides via fast and moisture insensitive polymerization of alpha-amino acid N-carboxyanhydrides》 appeared in Chinese Journal of Polymer Science. The author of the article were Wu, Yue-Ming; Zhang, Wei-Wei; Zhou, Rui-Yi; Chen, Qi; Xie, Chen-Yu; Xiang, Heng-Xue; Sun, Bin; Zhu, Mei-Fang; Liu, Run-Hui. The article conveys some information:

Polypeptides have been widely utilized in the fields of biomaterials and biomedicine. Ever since N-carboxyanhydride (NCA) was reported by Hermann Leuchs in 1906, ring-opening polymerization of NCAs has been extensively used to prepare polypeptides. Despite continuous innovations, it is still challenging to synthesize polypeptides in high mol. weight efficiently. To address this challenge, we developed KHMDS/NaHMDS initiated fast NCA polymerization that is also moisture tolerant, open-flask amenable and terminal tunable. This NCA polymerization was able to proceed in most common solvents and meet the solubility requirement of variable NCA monomers and corresponding polypeptides. KHMDS can initiate γ-benzyl-L-glutamate-N-carboxyanhydride (BLG NCA) polymerization in a reaction rate 92 times faster than does hexylamine and 80 times faster than does triethylamine. This NCA polymerization also demonstrated easy and fast synthesis of gram-scale long chain polypeptides in an open flask. In the experimental materials used by the author, we found H-Lys(Boc)-OH(cas: 2418-95-3Recommanded Product: H-Lys(Boc)-OH)

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

Yang, Tsung-Mao’s team published research in Chemical Engineering & Technology in 2020 | CAS: 70-55-3

4-Methylbenzenesulfonamide(cas: 70-55-3) belongs to anime. Hydrogen peroxide (H2O2) and peroxy acids generally add an oxygen atom to the nitrogen of amines. With primary amines, this step is normally followed by further oxidation, leading to nitroso compounds, RNO, or nitro compounds, RNO2. Secondary amines are converted to hydroxylamines, R2NOH, and tertiary amines to amine oxides, R3NO.Product Details of 70-55-3

Product Details of 70-55-3In 2020 ,《Solid Solubilities of Sulfonamides and Use of Rapid Expansion of Supercritical Solutions for Microparticle Production》 was published in Chemical Engineering & Technology. The article was written by Yang, Tsung-Mao; Li, Jin-Shuh; Yeh, Tsao-Fa; Su, Chie-Shaan. The article contains the following contents:

The solubility of solid active pharmaceutical ingredients in supercritical fluids is a major thermodn. criterion for selection and screening of microparticle generation processes. To develop an efficient method for solubility prediction, a solution model was adopted to establish the correlations of the solid solubilities of six sulfonamides in supercritical CO2. The model was capable of determining solubility correlations. Accordingly, it was attempted to simplify and generalize the model, yielding a predictive solution model, which provided order-consistent solubility predictions. A case study for model extrapolation was conducted. After understanding the mechanisms underlying the solubility of sulfonamides, the rapid expansion of supercritical solutions (RESS) process was applied to produce microparticles of p-toluenesulfonamide, an anticancer drug. The effects of RESS process parameters were investigated. In the experiment, the researchers used many compounds, for example, 4-Methylbenzenesulfonamide(cas: 70-55-3Product Details of 70-55-3)

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

Wang, Wei’s team published research in Ecotoxicology and Environmental Safety in 2022 | CAS: 683-57-8

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: 683-57-8

In 2022,Wang, Wei; Ma, Qiyao; Ding, Xinliang; Xu, Yihua; He, Mengting; Xu, Jie; Liu, Jianjun; Ji, Cheng; Zhang, Jie published an article in Ecotoxicology and Environmental Safety. The title of the article was 《Developmental toxicity of bromoacetamide via the thyroid hormone receptors-mediated disruption of thyroid hormone homeostasis in zebrafish embryos》.Recommanded Product: 683-57-8 The author mentioned the following in the article:

Bromoacetamide (BAcAm) is a nitrogenous disinfection byproduct. We previously found that BAcAm induced developmental toxicity in zebrafish embryos, but the underlying mechanisms remain to be elucidated. Since thyroid hormones (THs) homeostasis is crucial to development, we hypothesized that disruption of THs homeostasis may play a role in the developmental toxicity of BAcAm. In this study, we found BAcAm exposure significantly increased mortality and malformation rate, decreased hatching rate and body length, inhibited the locomotor capacity in zebrafish embryos. BAcAm elevated TSH, T3 and T4 levels, down-regulated T3/T4 ratios, and up-regulated mRNA expression changes of THs related genes (trh, tsh, tg, nis, tpo, dio1, dio2, ugt1ab,klf9 and rho), but down-regulated mRNA expression changes of TH receptors (tr α and tr β). Up-regulated tr α and tr β mRNAs by rescue treatment confirmed that both tr α and tr β were involved in the developmental toxicity of BAcAm. In conclusion, our study indicates disruption of THs homeostasis via the thyroid hormone receptors was responsible for the developmental toxicity of BAcAm. The experimental part of the paper was very detailed, including the reaction process of 2-Bromoacetamide(cas: 683-57-8Recommanded Product: 683-57-8)

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

Usman, Muhammad’s team published research in Science of the Total Environment in 2022 | CAS: 683-57-8

In 2022,Usman, Muhammad; Hueben, Michael; Kato, Takuro; Zwiener, Christian; Wintgens, Thomas; Linnemann, Volker published an article in Science of the Total Environment. The title of the article was 《Occurrence of brominated disinfection by-products in thermal spas》.Reference of 2-Bromoacetamide The author mentioned the following in the article:

Thermal spas are gaining more and more popularity among the population because they are used for recreational purposes. Disinfecting these baths without losing the health benefits poses a challenge for swimming pool operators. Previous studies have mainly focused on regulated chlorinated DBPs in freshwater pools with no bromide or seawater pools with very high bromide content. Thermal water pools have a low bromide content and in combination with chlorine can lead to chlorinated, brominated and mixed halogenated DBP species. The occurrence of brominated and mixed halogenated DBPs in these types of pools is largely unexplored, with very few or limited studies published on regulated DBPs and even fewer on emerging DBP classes. In the field of swimming pool water disinfection, apart from extensive studies in the field of drinking water disinfection, only a few studies are known in which >39 halogenated and 16 non-halogenated disinfection byproducts, including regulated trihalomethanes (THM) and haloacetic acids (HAA), were investigated in swimming pool water. Calculated bromine incorporation factor (BIF) demonstrated that even small amounts of bromide in swimming pool water can lead to a large shift in DBP species towards brominated and mixed halogenated DBPs. Dihaloacetonitriles (DHANs) accounted for >50% of the calculated cytotoxicity and genotoxicity on average Comparison of the target anal. with the TOX showed that a major part of the measured TOX (69% on average) could be explained by the regulated classes THMs, HAAs, and the unregulated class of HANs. This study aims to help operators of swimming pools with bromide-containing water to gain a better understanding of DBP formation in future monitoring and to fill the knowledge gap that has existed so far on the occurrence of DBPs in thermal water pools. The results came from multiple reactions, including the reaction of 2-Bromoacetamide(cas: 683-57-8Reference of 2-Bromoacetamide)

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

Ardissino, Maddalena’s team published research in European heart journal. Cardiovascular pharmacotherapy in 2022-02-16 | 96829-58-2

European heart journal. Cardiovascular pharmacotherapy published new progress about 96829-58-2. 96829-58-2 belongs to class amides-buliding-blocks, and the molecular formula is C29H53NO5, SDS of cas: 96829-58-2.

Ardissino, Maddalena; Vincent, Matthew; Hines, Oliver; Amin, Ravi; Eichhorn, Christian; Tang, Alice R; Collins, Peter; Moussa, Osama; Purkayastha, Sanjay published the artcile< Long-term cardiovascular outcomes after orlistat therapy in patients with obesity: a nationwide, propensity-score matched cohort study.>, SDS of cas: 96829-58-2, the main research area is Cardiovascular; Obesity; Orlistat; Weight loss; outcomes.

AIMS: The rising prevalence of obesity and its associated comorbidities represent a growing public health issue; in particular, obesity is known to be a major risk factor for cardiovascular disease. Despite the evidence behind the efficacy of orlistat in achieving weight loss in patients with obesity, no study thus far has quantified its long-term effect on cardiovascular outcomes. The purpose of this study is to explore long-term cardiovascular outcomes after orlistat therapy. METHODS AND RESULTS: A propensity-score matched cohort study was conducted on the nation-wide electronic primary and integrated secondary healthcare records of the Clinical Practice Research Datalink (CPRD). The 36 876 patients with obesity in the CPRD database who had completed a course of orlistat during follow-up were matched on a 1:1 basis with equal numbers of controls who had not taken orlistat. Patients were followed up for a median of 6 years for the occurrence of the primary composite endpoint of major adverse cardiovascular events (fatal or non-fatal myocardial infarction or ischaemic stroke), and a number of secondary endpoints including primary endpoint components individually, the occurrence of new-onset heart failure, coronary revascularization, new chronic kidney disease stage III+ (CKD3+), and all-cause mortality. During the median study follow-up of 6 years, the occurrence of major adverse cardiovascular events was lower in the orlistat cohort [hazard ratio (HR) 0.74; 95% confidence interval (CI) 0.66-0.83, P < 0.001]. Patients who took orlistat experienced lower rates of myocardial infarction (HR 0.77; 95% CI 0.66-0.88, P < 0.001) and ischaemic stroke (HR 0.68; 95% CI 0.56 to -0.84, P < 0.001) as well as new-onset heart failure (HR 0.79; 95% CI 0.67-0.94, P = 0.007). There was no differences in revascularization rates (HR 1.12; 95% CI 0.91-1.38, P = 0.27), but a lower rate of both CKD3+ development (HR 0.78; 95% CI 0.73-0.83, P < 0.001) and mortality (HR 0.39, 95% CI 0.36 to -0.41, P < 0.001) was observed. CONCLUSION: In this nation-wide, propensity-score matched study, orlistat was associated with lower rates of overall major adverse cardiovascular events, new-onset heart failure, renal failure, and mortality. This study adds to current evidence on the known improvements in cardiovascular risk factor profiles of orlistat treatment by suggesting a potential role in primary prevention. European heart journal. Cardiovascular pharmacotherapy published new progress about 96829-58-2. 96829-58-2 belongs to class amides-buliding-blocks, and the molecular formula is C29H53NO5, SDS of cas: 96829-58-2.

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

Drebushchak, T N’s team published research in Journal of Thermal Analysis and Calorimetry in 2020-10-31 | 94-20-2

Journal of Thermal Analysis and Calorimetry published new progress about Cooling. 94-20-2 belongs to class amides-buliding-blocks, and the molecular formula is C10H13ClN2O3S, Application of C10H13ClN2O3S.

Drebushchak, T. N.; Drebushchak, V. A. published the artcile< Structural similarity and similarity in thermal properties of the polymorphs: melting and crystallization from the melt of tolbutamide and chlorpropamide>, Application of C10H13ClN2O3S, the main research area is tolbutamide chlorpropamide polymorphism melting crystallization thermal property.

Abstract: The polymorphism of tolbutamide and chlorpropamide under melting/crystallization was investigated with using DSC and in situ X-ray powder diffraction. The asymmetry in thermal transformations was revealed for both substances. Under heating, all tolbutamide/chlorpropamide polymorphs transform into high-temperature IH/ε polymorph, which melts at 128°C. The crystal structures of the high-temperature polymorphs, IH and ε, are very similar to each other in the unit cell parameters and in the arrangement of z-shaped infinite hydrogen-bonded ribbons. Under cooling, other polymorph crystallizes from the melt, V for tolbutamide and β for chlorpropamide, thus making easy the obtaining of these metastable polymorphs. The polymorphs of tolbutamide and chlorpropamide crystallized from their melts turned out to be also very similar to each other in their structures (space group, unit cell parameters, arrangement of π-shaped infinite hydrogen-bonded ribbons). Solid-solid transformation V → II in tolbutamide was detected both in samples stored under room conditions and those melted in capillaries, thus providing new easy way for II tolbutamide crystallization In generalizing our results, one can expect that if evident similarity is found among the polymorphs of similar mols. in their crystal structure, the similarity in their thermal properties can be also found, and vice versa.

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

Dong, Pei’s team published research in Organic Chemistry Frontiers in 2022 | 6961-82-6

Organic Chemistry Frontiers published new progress about Aziridines Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 6961-82-6 belongs to class amides-buliding-blocks, and the molecular formula is C6H6ClNO2S, Application of C6H6ClNO2S.

Dong, Pei; Li, Zhaojing; Liu, Xiaohua; Dong, Shunxi; Feng, Xiaoming published the artcile< Asymmetric synthesis of polycyclic spiroindolines via the Dy-catalyzed cascade reaction of 3-(2-isocyanoethyl)indoles with aziridines>, Application of C6H6ClNO2S, the main research area is isocyanoethyl indole aziridine dysprosium catalyst enantioselective tandem reaction; phenyltetrahydropyrrolo pyridoindole dicarboxylate preparation.

Herein, a tailored strategy to access such compounds through an asym. ring-opening/Friedel-Crafts/Mannich/desulfonylation cascade reaction was reported. In the presence of the N,N’-dioxide-Dy(III) complex, various 2,2′-diester aziridines and 3-(2-isocyanoethyl)indoles were converted into tetracyclic spiroindolines in a highly diastereo- and enantioselective manner (41 examples, up to 88% yield, 97% ee). On the basis of the absolute configuration of the product and previous works, a possible catalytic cycle was proposed to understand the origin of stereocontrol.

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

McAtee, Rory C’s team published research in Nature Communications in 2020-12-31 | 1524-40-9

Nature Communications published new progress about Amination catalysts. 1524-40-9 belongs to class amides-buliding-blocks, and the molecular formula is C6H6FNO2S, Name: 3-Fluorobenzenesulfonamide.

McAtee, Rory C.; Noten, Efrey A.; Stephenson, Corey R. J. published the artcile< Arene dearomatization through a catalytic N-centered radical cascade reaction>, Name: 3-Fluorobenzenesulfonamide, the main research area is cyclohexadiene fused sultam diastereoselective preparation; arylsulfonamide arene dearomatization iridium catalyzed centered radical cascade.

Herein, a catalytic protocol was reported to initiate a carboamination/dearomatization cascade that proceeded through transient sulfonamidyl radical intermediates formed from native sulfonamide N-H bonds leading to 1,4-cyclohexadiene-fused sultams such as I [R1 = F, CN, CF3, etc.; R2 = H, F; R3 = R4 = Me; R3R4 = (CH2)3; R5 = H, Me; X = CH2, O]. Importantly, this work demonstrated a facile approach to employ two-dimensional aromatic compounds as modular building blocks to generate richly substituted, three-dimensional compounds These reactions occurred at room temperature under visible light irradiation and were catalyzed by the combination of an iridium(III) photocatalyst and a dialkyl phosphate base. Reaction optimization, substrate scope, mechanistic features and synthetic applications of this transformation were presented.

Nature Communications published new progress about Amination catalysts. 1524-40-9 belongs to class amides-buliding-blocks, and the molecular formula is C6H6FNO2S, Name: 3-Fluorobenzenesulfonamide.

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

Bhargava, P N’s team published research in Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry in 1977-07-31 | 5326-82-9

Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry published new progress about Nervous system depressants. 5326-82-9 belongs to class amides-buliding-blocks, and the molecular formula is C10H20ClNO, Application of C10H20ClNO.

Bhargava, P. N.; Singh, H. D. published the artcile< Synthesis of 3-aryl-6-bromo-2-(substituted)-thio-4(3H)-quinazolones as CNS depressants>, Application of C10H20ClNO, the main research area is quinazolone preparation central depressant.

Fourteen new 3-aryl-6-bromo-2-(N,N-dialkylcarboxamidomethylthio)-4(3H)quinazolones were prepared Pharmacol. screening indicates that 6-bromo-2-(N,N-diisobutylcarboxamidomethylthio)-3-phenyl-, 6-bromo-2-(N,N-dibenzylcarboxamidomethylthio)-3-p-chlorophenyl- and 6-bromo-2-(N,N-dibenzylcarboxamidomethylthio)-3-p-methoxyphenyl-4(3H)quinazolones possess CNS depressant activity.

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

Wang, Chao-Jie’s team published research in European Journal of Medicinal Chemistry in 2021-11-15 | 5004-88-6

European Journal of Medicinal Chemistry published new progress about Acetophenones Role: RCT (Reactant), RACT (Reactant or Reagent). 5004-88-6 belongs to class amides-buliding-blocks, and the molecular formula is C9H12N2O3, Recommanded Product: 2-Amino-4,5-dimethoxybenzamide.

Wang, Chao-Jie; Guo, Xinxin; Zhai, Rui-Qin; Sun, Changning; Xiao, Guokai; Chen, Jin; Wei, Mei-Yan; Shao, Chang-Lun; Gu, Yuchao published the artcile< Discovery of penipanoid C-inspired 2-(3,4,5-trimethoxybenzoyl)quinazolin-4(3H)-one derivatives as potential anticancer agents by inhibiting cell proliferation and inducing apoptosis in hepatocellular carcinoma cells>, Recommanded Product: 2-Amino-4,5-dimethoxybenzamide, the main research area is trimethoxybenzoyl quinazolinone anticancer discovery preparation human apoptosis; Apoptosis; Cell cycle; Hepatocellular carcinoma; Penipanoid C; Quinazoline.

Hepatocellular carcinoma (HCC) is the most common form of liver cancer and the fourth leading cause of cancer-related death worldwide. First-line drugs such as sorafenib provide only a modest benefit to HCC patients. In this study, the gram-scale synthesis of 2-benzoylquinazolin-4(3H)-one skeleton was achieved successfully via the I2/DMSO catalytic system. A series of penipanoid C-inspired 2-(3,4,5-trimethoxybenzoyl)quinazolin-4(3H)-one derivatives was synthesized and evaluated for their cytotoxic activities against four cancer cell lines, HepG2, Bel-7402, A549, and U251. Among these compounds, I was the most effective one with IC50 values of 1.22μM and 1.71μM against HepG2 and Bel-7402 cells, resp. Mechanistic studies showed that I inhibited hepatocellular carcinoma cell proliferation via arresting cell cycle. Addnl., I induced HepG2 cells apoptosis by inducing reactive oxygen species production and elevating the expression of apoptosis-related proteins. More importantly, I displayed significant in vivo anticancer effects in the HepG2 xenograft models. This suggests that I is a promising lead compound with the potential to be developed as a chemotherapy agent for hepatocellular carcinoma.

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