Month: October 2022

The author of 《1-Phenyl-N-(benzothiazol-2-yl)methanimine derivatives as Middle East respiratory syndrome coronavirus inhibitors》 were Hu, Min-Qi; Li, Heng; Lin, Ying; Zhang, Ying; Tang, Jie; Zuo, Jian-Ping; Yu, Li-Fang; Tong, Xian-Kun; Tang, Wei; Yang, Fan. And the article was published in RSC Advances in 2020. Synthetic Route of C7H3BrFNS The author mentioned the following in the article:

Middle East respiratory syndrome coronavirus (MERS-CoV) poses a serious threat to human health, and currently there are no effective or specific therapies available to treat it. Herein a series of 1-phenyl-N-(benzothiazol-2-yl)methanimine derivatives with inhibitory activity against MERS-CoV are described. The compound 4f with a 50% inhibition concentration value of 0.09 μM is a promising inhibitor that warrants further evaluation, towards the development of potential anti-MERS-CoV drugs. After reading the article, we found that the author used 2-Bromo-6-fluorobenzothiazole(cas: 152937-04-7Synthetic Route of C7H3BrFNS)

2-Bromo-6-fluorobenzothiazole(cas: 152937-04-7) belongs to thiazoles. Thiazoles are a class of five-membered rings containing nitrogen and sulfur with excellent antitumor, antiviral and antibiotic activities.Synthetic Route of C7H3BrFNSTheir presence in peptides or their ability to bind proteins, DNA and RNA has led to many synthetic studies and new applications.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

The author of 《Exploration of the Antimicrobial Effects of Benzothiazolylthiazolidin-4-One and In Silico Mechanistic Investigation》 were Haroun, Michelyne; Tratrat, Christophe; Petrou, Anthi; Geronikaki, Athina; Ivanov, Marija; Ciric, Ana; Sokovic, Marina; Nagaraja, Sreeharsha; Venugopala, Katharigatta Narayanaswamy; Balachandran Nair, Anroop; Elsewedy, Heba S.; Kochkar, Hafedh. And the article was published in Molecules in 2021. Product Details of 95-24-9 The author mentioned the following in the article:

Infectious diseases still affect large populations causing significant morbidity and mortality. Bacterial and fungal infections for centuries were the main factors of death and disability of millions of humans. Despite the progress in the control of infectious diseases, the appearance of resistance of microbes to existing drugs creates the need for the development of new effective antimicrobial agents. In an attempt to improve the antibacterial activity of previously synthesized compounds modifications to their structures were performed. Nineteen thiazolidinone derivatives with 6-Cl, 4-OMe, 6-CN, 6-adamantan, 4-Me, 6-adamantan substituents at benzothiazole ring were synthesized and evaluated against panel of four bacterial strains S. aureus, L. monocytogenes, E. coli and S. typhimirium and three resistant strains MRSA, E. coli and P. aeruginosa in order to improve activity of previously evaluated 6-OCF3-benzothiazole-based thiazolidinones. The evaluation of min. inhibitory and min. bactericidal concentration was determined by microdilution method. As reference compounds ampicillin and streptomycin were used. All compounds showed antibacterial activity with MIC in range of 0.12-0.75 mg/mL and MBC at 0.25->1.00 mg/mL The most active compound among all tested appeared to be compound 18, with MIC at 0.10 mg/mL and MBC at 0.12 mg/mL against P. aeruginosa. as well as against resistant strain P. aeruginosa with MIC at 0.06 mg/mL and MBC at 0.12 mg/mL almost equipotent with streptomycin and better than ampicillin. Docking studies predicted that the inhibition of LD-carboxypeptidase is probably the possible mechanism of antibacterial activity of tested compounds The best improvement of antibacterial activity after modifications was achieved by replacement of 6-OCF3 substituent in benzothiazole moiety by 6-Cl against S. aureus, MRSA and resistant strain of E. coli by 2.5 folds, while against L. monocytogenes and S. typhimirium from 4 to 5 folds. The experimental process involved the reaction of 6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9Product Details of 95-24-9)

6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9) belongs to thiazoles. Thiazoles are a class of five-membered rings containing nitrogen and sulfur with excellent antitumor, antiviral and antibiotic activities.Product Details of 95-24-9The thiazole ring has been identified as a central feature of numerous natural products, perhaps the most famous example of which is epothilone.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Wang, Rongrong; Huang, Xirong published their research in ACS Omega on August 10 ,2021. The article was titled 《Anionic-Surfactant-Stabilized Hydrophobic Ionic-Liquid-Based Bicontinuous Microemulsion as a Medium for Enzymatic Oxidative Polymerization of Aniline》.Related Products of 30931-67-0 The article contains the following contents:

The hydrophobic ionic liquid [C8mim][PF6] (1-octyl-3-methylimidazolium hexafluorophosphate)-based bicontinuous microemulsion stabilized by the anionic surfactant [C4mim][AOT] (1-butyl-3-methylimidazolium bis(2-ethylhexyl) sulfosuccinate) was first tried as a medium for horseradish peroxidase (HRP)-triggered oxidative polymerization of aniline. The effects of the mass ratio of [C8mim][PF6]-to-water (α), the mass fraction of [C4mim][AOT] in the total mixture (γ), and temperature (T) on the enzymic polymerization were investigated using UV-vis-NIR absorption, ESR, and small-angle X-ray scattering spectroscopy techniques. The bicontinuous microemulsion is demonstrated to play a template role in the biosynthesis of polyaniline (PANI). The conductivity of the resulting PANI depends on the microemulsion microstructure and the microstructure- and T-dependent catalytic properties of the solubilized HRP. With the increase in α, the conductivity of the synthesized PANI decreases due to the increase in the template curvature (decrease of the microdomain size) and the decrease in the activity and stability of HRP. Compared with α, γ has little effect on the microdomain size of the template; so, the γ-dependent change in the conductivity of PANI is mainly caused by the changes of the microstructure-dependent activity and stability of HRP. Over the range of 20-35°C, T has little effect on the microdomain size, but it greatly changes the activity and stability of HRP. With the increase in T, the activity of HRP increases steadily, but its stability decreases significantly, which should be one of the reasons why the conductivity of PANI decreases with increasing T. In conclusion, lower values of α, γ, and T are favorable for the biosynthesis of conductive PANI. The present study not only deepens the insight into the role of the template in the process of PANI synthesis, but also opens up a green new way for the biosynthesis of the conducting polymer.ABTS Diammonium(cas: 30931-67-0Related Products of 30931-67-0) was used in this study.

ABTS Diammonium(cas: 30931-67-0) belongs to anime. Acylation is one of the most important reactions of primary and secondary amines; a hydrogen atom is replaced by an acyl group (a group derived from an acid, such as RCOOH or RSO3H, by removal of ―OH, such as RC(=O)―, RS(O)2―, and so on). Reagents may be acid chlorides (RCOC1, RSO2C1), anhydrides ((RCO)2O), or even esters (RCOOR′); the products are amides of the corresponding acids.Related Products of 30931-67-0

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Category: thiazoleIn 2021 ,《Discovery of a cooperative mode of inhibiting RIPK1 kinase》 was published in Cell Discovery. The article was written by Meng, Huyan; Wu, Guowei; Zhao, Xinsuo; Wang, Anhui; Li, Dekang; Tong, Yilun; Jin, Taijie; Cao, Ye; Shan, Bing; Hu, Shichen; Li, Ying; Pan, Lifeng; Tian, Xiaoxu; Wu, Ping; Peng, Chao; Yuan, Junying; Li, Guohui; Tan, Li; Wang, Zhaoyin. The article contains the following contents:

RIPK1, a death domain-containing kinase, has been recognized as an important therapeutic target for inhibiting apoptosis, necroptosis, and inflammation under pathol. conditions. RIPK1 kinase inhibitors have been advanced into clin. studies for the treatment of various human diseases. One of the current bottlenecks in developing RIPK1 inhibitors is to discover new approaches to inhibit this kinase as only limited chemotypes have been developed. Here we describe Necrostatin-34 (Nec-34), a small mol. that inhibits RIPK1 kinase with a mechanism distinct from known RIPK1 inhibitors such as Nec-1s. Mechanistic studies suggest that Nec-34 stabilizes RIPK1 kinase in an inactive conformation by occupying a distinct binding pocket in the kinase domain. Furthermore, we show that Nec-34 series of compounds can synergize with Nec-1s to inhibit RIPK1 in vitro and in vivo. Thus, Nec-34 defines a new strategy to target RIPK1 kinase and provides a potential option of combinatorial therapy for RIPK1-mediated diseases. The experimental part of the paper was very detailed, including the reaction process of 5-Bromothiazol-2-amine(cas: 3034-22-8Category: thiazole)

5-Bromothiazol-2-amine(cas: 3034-22-8) belongs to anime. Milder oxidation, using reagents such as NaOCl, can remove four hydrogen atoms from primary amines of the type RCH2NH2 to form nitriles (R―C≡N), and oxidation with reagents such as MnO2 can remove two hydrogen atoms from secondary amines (R2CH―NHR′) to form imines (R2C=NR′). Tertiary amines can be oxidized to enamines (R2C=CHNR2) by a variety of reagents.Category: thiazole

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

《Carbohydrates profile, polyphenols content and antioxidative properties of beer worts produced with different dark malts varieties or roasted barley grains》 was published in Molecules in 2020. These research results belong to Gasior, Justyna; Kawa-Rygielska, Joanna; Kucharska, Alicja Z.. Safety of ABTS Diammonium The article mentions the following:

The aim of this study was to assess the possibility of shaping properties of beers at the stage of brewing wort production with the use of various types of special malts (chocolate pale, chocolate dark, wheat chocolate, brown barley) and roasted barley grains. The carbohydrate profile, polyphenols content, antioxidant capacity, 5-hydroxymethylfurfural content, and the browning index level were analyzed. Statistical anal. showed significant differences in the values of the examined features between the samples. The sugars whose content was most affected by the addition of special malts were maltose and dextrins. The polyphenol content in worts with 10% of additive was 176.02-397.03 mg GAE/L, ferric reducing antioxidant power (FRAP) 1.32-2.07 mmol TE/L, and capacity to reduction radical generated from 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS•+) 1.46-2.70 mmol TE/L. Wort with 40% dark malt showed the highest content of polyphenolic compounds and antioxidant activity (FRAP and ABTS•+). The HMF content and the browning index value were higher for wort with the addition of darker-colored malts (EBC) and increased with increasing dark malt dose. The experimental process involved the reaction of ABTS Diammonium(cas: 30931-67-0Safety of ABTS Diammonium)

ABTS Diammonium(cas: 30931-67-0) belongs to anime. Aniline, ethanolamines, and several other amines are major industrial commodities used in making rubber, dyes, pharmaceuticals, and synthetic resins and fibres and for a host of other applications. Most of the numerous methods for the preparation of amines may be broadly divided into two groups: (1) chemical reduction (replacement of oxygen with hydrogen atoms in the molecule) of members of several other classes of organic nitrogen compounds and (2) reactions of ammonia or amines with organic compounds.Safety of ABTS Diammonium

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

《Revealing the active site of gold nanoparticles for the peroxidase-like activity: the determination of surface accessibility》 was published in Catalysts in 2019. These research results belong to Liu, Ching-Ping; Chen, Kuan-Chung; Su, Ching-Feng; Yu, Po-Yen; Lee, Po-Wei. Related Products of 30931-67-0 The article mentions the following:

Despite the fact that the enzyme-like activities of nanozymes (i.e., nanomaterial-based artificial enzymes) are highly associated with their surface properties, little is known about the catalytic active sites. Here, we used the sulfide ion (S2-)-induced inhibition of peroxidase-like activity to explore active sites of gold nanoparticles (AuNPs). The inhibition mechanism was based on the interaction with Au(I) to form Au2S, implying that the Au(I) might be the active site of AuNPs for the peroxidase-like activity. XPS anal. showed that the content of Au(I) on the surface of AuNPs significantly decreased after the addition of S2-, which might be contributed to the more covalent Au-S bond in the formation of Au2S. Importantly, the variations of Au(I) with and without the addition of S2- for di erent surface-capped AuNPs were in good accordance with their corresponding peroxidase-like activities. These results confirmed that the accessible Au(I) on the surface was the main requisite for the peroxidase-like activity of AuNPs for the first time. In addition, the use of S2- could assist to determine available active sites for di erent surface modified AuNPs. This work not only provides a new method to evaluate the surface accessibility of colloidal AuNPs but also gains insight on the design of efficient AuNP-based peroxidase mimics. After reading the article, we found that the author used ABTS Diammonium(cas: 30931-67-0Related Products of 30931-67-0)

ABTS Diammonium(cas: 30931-67-0) 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.Related Products of 30931-67-0

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

In 2019,Molecules included an article by Avato, Pinarosa; Argentieri, Maria Pia. Computed Properties of C18H24N6O6S4. The article was titled 《Quality assessment of commercial spagyric tinctures of Harpagophytum procumbens and their antioxidant properties》. The information in the text is summarized as follows:

Preparations from the dried tubers of Harpagophytum procumbens (Burch.) DC ex Meisn, commonly known as devil’s claw, are mainly used in modern medicine to relieve joint pain and inflammation in patients suffering from rheumatic and arthritic disorders. This paper describes for the first time the chem. profile of a com. spagyric tincture (named 019) prepared from the roots of the plant. For comparison purposes, a com. not-spagyric devil’s claw tincture (NST) was also analyzed. Chem. investigation of the content of specialized metabolites in the three samples indicated that harpagoside was the main compound, followed by the two isomers acteoside and isoacteoside. Compositional consistence over time was obtained by the chem. fingerprinting of another spagyric tincture (named 014) from the same producer that was already expired according to the recommendation on the label of the product. The two spagyric preparations did not show significant compositional differences as revealed by HPLC and MS analyses, except for a decrease in harpagide content in the expired 014 tincture. Moreover, their antioxidant capacities as assessed by 2,2′-di-phenyl-1-picrylhydrazyl (DPPH) and 2.2′-azin-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) methods resulted in very similar IC50 values. The expired 014 tincture showed instead a lower IC50 value compared to the 019 and NST tinctures with the ferric reducing antioxidant potential (FRAP) assay, indicating a higher ferric-reducing antioxidant ability. Overall, these results indicated that the two preparations could generally maintain good stability and biol. activity at least for the four years from the production to the expiration date. In the experiment, the researchers used many compounds, for example, ABTS Diammonium(cas: 30931-67-0Computed Properties of C18H24N6O6S4)

ABTS Diammonium(cas: 30931-67-0) 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.Computed Properties of C18H24N6O6S4

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

In 2019,Molecules included an article by Zlotek, Urszula; Szymanowska, Urszula; Pecio, Lukasz; Kozachok, Solomiia; Jakubczyk, Anna. Related Products of 30931-67-0. The article was titled 《Antioxidative and potentially anti-inflammatory activity of phenolics from lovage Leaves Levisticum officinale koch elicited with jasmonic acid and yeast extract》. The information in the text is summarized as follows:

The effect of elicitation with jasmonic acids (JA) and yeast extract (YE) on the production of phenolic compounds as well as the antioxidant and anti-inflammatory properties of phenolic extracts of lovage was evaluated. The anal. of phenolic compounds carried out with the UPLCMS technique indicated that rutin was the dominant flavonoid, while 5-caffeoylquinic acid was the main component in the phenolic acid fraction in the lovage leaves. The application of 10μM JA increased the content of most of the identified phenolic compounds The highest antioxidant activities estimated as free radical scavenging activity against ABTS (2,2′-azino-bis(3- ethylbenzothiazoline-6-sulfonic acid)) and reducing power were determined for the sample elicited with 10μM JA, while this value determined as iron chelating ability was the highest for the 0.1% YE-elicited lovage. The 0.1% and 1% YE elicitation also caused significant elevation of the lipoxygenase (LOX) inhibition ability, while all the concentrations of the tested elicitors significantly improved the ability to inhibit cyclooxygenase 2 (COX2) (best results were detected for the 10μM JA and 0.1% YE2 sample). Thus, 0.1% yeast extract and 10μM jasmonic acid proved to be most effective in elevation of the biol. activity of lovage. In the experiment, the researchers used ABTS Diammonium(cas: 30931-67-0Related Products of 30931-67-0)

ABTS Diammonium(cas: 30931-67-0) belongs to anime. Halogenation, in which one or more hydrogen atoms of an amine is replaced by a halogen atom, occurs with chlorine, bromine, and iodine, as well as with some other reagents, notably hypochlorous acid (HClO). With primary amines the reaction proceeds in two stages, producing N-chloro- and N,N-dichloro-amines, RNHCl and RNCl2, respectively. With tertiary amines, an alkyl group may be displaced by a halogen.Related Products of 30931-67-0

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Li, Guoliang; He, Yundong; Zhou, Wenbo; Wang, Peng; Zhang, Yong; Tong, Weiguang; Wu, Haigang; Liu, Mingyao; Ye, Xiyun; Chen, Yihua published an article on February 1 ,2014. The article was titled 《Identification, synthesis and photo-protection evaluation of arylthiazole derivatives as a novel series of sunscreens》, and you may find the article in Heterocycles.Recommanded Product: 144060-98-0 The information in the text is summarized as follows:

A series of arylthiazole derivatives I [R3 = C6H5, C6H5CH2, C6H5CH2CH2], II [R1 = C6H5, 4-BrC6H4, 3-H3COC6H4, 2-H3COC6H4], III [n= 1, 2, 3, 5; R = H, n-Pr, n-Bu, Et; R2 = OMe, OEt] and IV [R1 = H, CF3, OMe, Cl; R2 = H, Cl; R3 = H, Cl] was designed and synthesized. Addnl., phenylfuran derivative V [X = O; Y = C; R = H], phenylthiophene derivative V [X = S; Y = C; R = H], phenyloxazole derivative V [X = O; Y = N; R = Me], N-(Ethoxycarbonylmethyl)-2-phenyl-4-thiazolecarboxamide and N-(Ethoxycarbonylmethyl)-3-phenyl-5-methyl-4-isooxazolecarboxamide were also prepared All the synthesized compounds were evaluated for their photo-protective effect against UVB exposure induced cellular damage in keratinocytes cell (HaCaT) and their structure-activity relationship (SAR) was discussed. Among the tested compounds, compound III [n = 1; R = Et; R2 = OEt] significantly protected the dorsal skin of BALB/c-nu mice against UVB-induced decrustation in vivo. The in vitro and in vivo data for these arylthiazole derivatives suggest further studies for their potential use as photo-protection agents as well as sunscreen candidates. After reading the article, we found that the author used 4-Methyl-2-(pyridin-4-yl)thiazole-5-carboxylic acid(cas: 144060-98-0Recommanded Product: 144060-98-0)

4-Methyl-2-(pyridin-4-yl)thiazole-5-carboxylic acid(cas: 144060-98-0) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Recommanded Product: 144060-98-0

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Quality Control of ABTS DiammoniumOn October 15, 2019 ,《Reactivity of chromophoric dissolved organic matter (CDOM) to sulfate radicals: Reaction kinetics and structural transformation》 was published in Water Research. The article was written by Zhang, Suona; Rouge, Valentin; Gutierrez, Leonardo; Croue, Jean-Philippe. The article contains the following contents:

SO4·- would selectively react with electron rich moieties in DOM, known as chromophoric DOM (CDOM), due to its light absorbing property. In this study, the reactivity and typical structural transformation of CDOM with SO·-4 was investigated. Four well characterized hydrophobic DOM fractions extracted from different surface water sources were selected as model CDOM. SO4·- was produced through the activation of peroxymonosulfate (PMS) by Co(II) ions at pH 8 in borate buffer. The reactivity of CDOM changed with time where fast and slow reacting CDOMs (i.e., CDOMfast and CDOMslow) were clearly distinguished. A second-order rate constant of CDOMfast with SO·-4 was calculated by plotting UVA254 decrease vs. PMS exposure; where a Rct value (i.e., ratio of sulfate radical exposure to PMS exposure) was calculated using pCBA as a probe compound The transformation of CDOM was studied through the anal. of the changes in UVA254, electron donating capacity, fluorescence intensity, and total organic carbon. A transformation pathway leading to a significant carbon removal was proposed. This new knowledge on the kinetics and transformation of CDOM would ultimately assist in the development and operation of SO·-4-based water treatment processes. The results came from multiple reactions, including the reaction of ABTS Diammonium(cas: 30931-67-0Quality Control of ABTS Diammonium)

ABTS Diammonium(cas: 30931-67-0) belongs to anime. Left-handed and right-handed forms (mirror-image configurations, known as optical isomers or enantiomers) are possible when all the substituents on the central nitrogen atom are different (i.e., the nitrogen is chiral). With amines, there is extremely rapid inversion in which the two configurations are interconverted.Quality Control of ABTS Diammonium

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica