Month: October 2022

The author of 《Removal of diclofenac from a non-sterile aqueous system using Trametes versicolor with an emphasis on adsorption and biodegradation mechanisms》 were Stenholm, Aake; Hedeland, Mikael; Arvidsson, Torbjoern; Pettersson, Curt E.. And the article was published in Environmental Technology in 2019. Formula: C18H24N6O6S4 The author mentioned the following in the article:

This paper describes the search for procedures through which the xenobiotic pollutant diclofenac can be removed from non-sterile aquatic systems. Specifically, adsorption to solid supports (carriers) in combination with biodegradation by non-immobilized and immobilized white rot fungus Trametes versicolor were investigated. Batch experiments using polyurethane foam (PUF)-carriers resulted in 99.9% diclofenac removal after 4 h, with monolayer adsorption of diclofenac to carrier and glass surfaces accounting for most of the diclofenac decrease. Enzymic reactions contributed less, accounting for approx. < 0.5% of this decrease. In bioreactor experiments using PUF-carriers, an initial 100% removal was achieved with biodegradation contributing approx. 7%. In batch experiments that utilized polyethylene-carriers with negligible immobilization of Trametes versicolor, a 98% total diclofenac removal was achieved after one week, with a biodegradation contribution of approx. 14%. Five novel enzyme-catalyzed biodegradation products were tentatively identified in the batch-wise and bioreactor experiments using full scan ultra-high-performance liquid chromatog.-quadrupole/time of flight mass spectrometry. Both reduction and oxidation products were found, with the contents estimated to be at μg L-1 concentration levels. In the experiment, the researchers used many compounds, for example, ABTS Diammonium(cas: 30931-67-0Formula: C18H24N6O6S4)

ABTS Diammonium(cas: 30931-67-0) belongs to anime. To avoid the problem of multiple alkylation, methods have been devised for “blocking” substitution so that only one alkyl group is introduced. The Gabriel synthesis is one such method; it utilizes phthalimide, C6H4(CO)2NH, whose one acidic hydrogen atom has been removed upon the addition of a base such as KOH to form a salt.Formula: C18H24N6O6S4

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

Tikhonova, Tatyana A.; Rassokhina, Irina V.; Kondrakhin, Eugeny A.; Fedosov, Mikhail A.; Bukanova, Julia V.; Rossokhin, Alexey V.; Sharonova, Irina N.; Kovalev, Georgy I.; Zavarzin, Igor V.; Volkova, Yulia A. published an article on January 31 ,2020. The article was titled 《Development of 1,3-thiazole analogues of imidazopyridines as potent positive allosteric modulators of GABAA receptors》, and you may find the article in Bioorganic Chemistry.Recommanded Product: 6-Chlorobenzothiazol-2-ylamine The information in the text is summarized as follows:

Structure-activity relationship studies were conducted in the search for 1,3-thiazole isosteric analogs of imidazopyridine drugs (Zolpidem, Alpidem). Three series of novel γ-aminobutyric acid receptor (GABAAR) ligands belonging to imidazo[2,1-b]thiazoles I [R1 = OMe, NMe2, OEt; R2 = p-chlorophenyl], [R1 = OMe, R2 = p-nitrophenyl] and [R1 = OEt, R2 = o,p-dichlorophenyl], imidazo[2,1-b][1,3,4]thiadiazoles II [R3 = OEt, NMe2, NPr2; R4 = p-chlorophenyl; R5 = Et, iso-Pr, MOM] and benzo[d]imidazo[2,1-b]thiazoles III [R6 = NH2, OEt, NMe2, NEt2, NPr2; R7 = Ph, p-fluorophenyl o,p-dimethoxyphenyl, etc.; R8 = H, Cl, OMe] were synthesized and characterized as active agents against GABAAR benzodiazepine-binding site. In each of these series, potent compounds were discovered using a radioligand competition binding assay. The functional properties of highest-affinity compounds III [R6 = NH2, R7 = p-chlorophenyl, R8 = H] and [R6 = NMe2, R7 = o-chlorophenyl, R8 = H] as GABAAR pos. allosteric modulators (PAMs) were determined by electrophysiol. measurements. In-vivo studies on zebrafish demonstrated their potential for the further development of anxiolytics. Using the OECD “”Fish, Acute Toxicity Test”” active compounds were found safe and non-toxic. Structural bases for activity of benzo[d]imidazo[2,1-b]thiazoles were proposed using mol. docking studies. The isosteric replacement of the pyridine nuclei by 1,3-thiazole, 1,3,4-thiadiazole, or 1,3-benzothiazole in the ring-fused imidazole class of GABAAR PAMs was showed to be promising for the development of novel hypnotics, anxiolytics, anticonvulsants and sedatives drug-candidates.6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9Recommanded Product: 6-Chlorobenzothiazol-2-ylamine) was used in this study.

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.Recommanded Product: 6-Chlorobenzothiazol-2-ylamineTheir 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

In 2008,Andersen, Carsten B.; Wan, Yongqin; Chang, Jae W.; Riggs, Blake; Lee, Christian; Liu, Yi; Sessa, Fabio; Villa, Fabrizio; Kwiatkowski, Nicholas; Suzuki, Melissa; Nallan, Laxman; Heald, Rebecca; Musacchio, Andrea; Gray, Nathanael S. published 《Discovery of Selective Aminothiazole Aurora Kinase Inhibitors》.ACS Chemical Biology published the findings.Product Details of 3034-22-8 The information in the text is summarized as follows:

Aurora family kinases regulate important events during mitosis including centrosome maturation and separation, mitotic spindle assembly, and chromosome segregation. Misregulation of Aurora kinases due to genetic amplification and protein overexpression results in aneuploidy and may contribute to tumorigenesis. Here we report the discovery of new small mol. aminothiazole inhibitors of Aurora kinases with exceptional kinase selectivity and report a 1.7 Å cocrystal structure with the Aurora B:INCENP complex from Xenopus laevis. The compounds recapitulate the hallmarks of Aurora kinase inhibition, including decreased histone H3 serine 10 phosphorylation, failure to complete cytokinesis, and endoreduplication. The experimental part of the paper was very detailed, including the reaction process of 5-Bromothiazol-2-amine(cas: 3034-22-8Product Details of 3034-22-8)

5-Bromothiazol-2-amine(cas: 3034-22-8) 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.Product Details of 3034-22-8

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

Recommanded Product: 5-Bromothiazol-2-amineIn 2009 ,《Discovery of Imidazo[1,2-b]thiazole Derivatives as Novel SIRT1 Activators》 was published in Journal of Medicinal Chemistry. The article was written by Vu, Chi B.; Bemis, Jean E.; Disch, Jeremy S.; Ng, Pui Yee; Nunes, Joseph J.; Milne, Jill C.; Carney, David P.; Lynch, Amy V.; Smith, Jesse J.; Lavu, Siva; Lambert, Philip D.; Gagne, David J.; Jirousek, Michael R.; Schenk, Simon; Olefsky, Jerrold M.; Perni, Robert B.. The article contains the following contents:

A series of imidazo[1,2-b]thiazole derivatives is shown to activate the NAD+-dependent deacetylase SIRT1, a potential new therapeutic target to treat various metabolic disorders. This series of compounds was derived from a high throughput screening hit bearing an oxazolopyridine core. Water-solubilizing groups could be installed conveniently at either the C-2 or C-3 position of the imidazo[1,2-b]thiazole ring. The SIRT1 enzyme activity could be adjusted by modifying the amide portion of these imidazo[1,2-b]thiazole derivatives The most potent analog within this series, namely, compound 29 (I), has demonstrated oral antidiabetic activity in the ob/ob mouse model, the diet-induced obesity (DIO) mouse model, and the Zucker fa/fa rat model. The experimental process involved the reaction of 5-Bromothiazol-2-amine(cas: 3034-22-8Recommanded Product: 5-Bromothiazol-2-amine)

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.Recommanded Product: 5-Bromothiazol-2-amine

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

Quality Control of ABTS DiammoniumOn May 31, 2021, Yan, Bingsong; Liu, Wendong; Duan, Guangbin; Ni, Pengjuan; Jiang, Yuanyuan; Zhang, Chenghui; Wang, Bo; Lu, Yizhong; Chen, Chuanxia published an article in Microchimica Acta. The article was 《Colorimetric detection of acetylcholinesterase and its inhibitor based on thiol-regulated oxidase-like activity of 2D palladium square nanoplates on reduced graphene oxide》. The article mentions the following:

A convenient and sensitive colorimetric assay for acetylcholinesterase (AChE) and its inhibitor has been designed based on the oxidase-like activity of {100}-faceted Pd square nanoplates which are grown in situ on reduced graphene oxide (PdSP@rGO). PdSP@rGO can effectively catalyze the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) without the assistance of H2O2 to generate blue oxidized TMB (oxTMB) with a characteristic absorption peak at 652 nm. In the presence of AChE, acetylthiocholine (ATCh), a typical AChE substrate, is hydrolyzed to thiocholine (TCh). The generated TCh can effectively inhibit the PdSP@rGO-triggered chromogenic reaction of TMB via cheating with Pd, resulting in color fading and decrease in absorbance. Thus, a sensitive probe for AChE activity is constructed with a working range of 0.25-5 mU mL-1 and a limit of detection (LOD) of 0.0625 mU mL-1. Furthermore, because of the inhibition effect of tacrine on AChE, tacrine is also detected through the colorimetric AChE assay system within the concentrations range 0.025-0.4μM with a LOD of 0.00229μM. Hence, a rapid and facile colorimetric procedure to sensitively detect AChE and its inhibitor can be anticipated through modulating the oxidase-like activity of [email protected] Diammonium(cas: 30931-67-0Quality Control of ABTS Diammonium) was used in this study.

ABTS Diammonium(cas: 30931-67-0) belongs to anime. Reduction of nitro compounds, RNO2, by hydrogen or other reducing agents produces primary amines cleanly (i.e., without a mixture of products), but the method is mostly used for aromatic amines because of the limited availability of aliphatic nitro compounds. Reduction of nitriles and oximes (R2C=NOH) also yields primary amines.Quality Control of ABTS Diammonium

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

Category: thiazoleOn March 26, 2020, Singh, Manjula; Dhar S. Yadav, Lal; Krishna Pal Singh, Rana published an article in Tetrahedron Letters. The article was 《Visible-light photoredox catalytic approach for the direct synthesis of 2-aminobenzothiazoles from anilines》. The article mentions the following:

A novel, highly efficient and convenient approach for the visible-light-promoted direct synthesis of 2-aminobenzothiazoles from anilines and ammonium thiocyanate is presented. The reaction involves addition/cyclization cascade of SCN radical and anilines under photoredox catalysis with Ru(bpy)3Cl2. The salient features of the protocol include the utilization of atm. oxygen and visible light as clean, inexpensive and sustainable resources at room temperature After reading the article, we found that the author used 6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9Category: thiazole)

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.Category: thiazoleThiazoles can also be used as protected formyl groups, which can be released in later stages of complex natural product synthesis.

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

Name: 6-Chlorobenzothiazol-2-ylamineOn October 31, 2019 ,《A novel assay to screen siRNA libraries identifies protein kinases required for chromosome transmission》 appeared in Genome Research. The author of the article were Liskovykh, Mikhail; Goncharov, Nikolay V.; Petrov, Nikolai; Aksenova, Vasilisa; Pegoraro, Gianluca; Ozbun, Laurent L.; Reinhold, William C.; Varma, Sudhir; Dasso, Mary; Kumeiko, Vadim; Masumoto, Hiroshi; Earnshaw, William C.; Larionov, Vladimir; Kouprina, Natalay. The article conveys some information:

One of the hallmarks of cancer is chromosome instability (CIN), which leads to aneuploidy, translocations, and other chromosome aberrations. However, in the vast majority of human tumors the mol. basis of CIN remains unknown, partly because not all genes controlling chromosome transmission have yet been identified. To address this question, we developed an exptl. high-throughput imaging (HTI) siRNA assay that allows the identification of novel CIN genes. Our method uses a human artificial chromosome (HAC) expressing the GFP transgene. When this assay was applied to screen an siRNA library of protein kinases, we identified PINK1, TRIO, IRAK1, PNCK, and TAOK1 as potential novel genes whose knockdown induces various mitotic abnormalities and results in chromosome loss. The HAC-based assay can be applied for screening different siRNA libraries (cell cycle regulation, DNA damage response, epigenetics, and transcription factors) to identify addnl. genes involved in CIN. Identification of the complete spectrum of CIN genes will reveal new insights into mechanisms of chromosome segregation and may expedite the development of novel therapeutic strategies to target the CIN phenotype in cancer cells. After reading the article, we found that the author used 6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9Name: 6-Chlorobenzothiazol-2-ylamine)

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.Name: 6-Chlorobenzothiazol-2-ylamineThiazoles can also be used as protected formyl groups, which can be released in later stages of complex natural product synthesis.

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

Tokala, Ramya; Mahajan, Surbhi; Kiranmai, Gaddam; Sigalapalli, Dilep Kumar; Sana, Sravani; John, Stephy Elza; Nagesh, Narayana; Shankaraiah, Nagula published an article on January 31 ,2021. The article was titled 《Development of β-carboline-benzothiazole hybrids via carboxamide formation as cytotoxic agents: DNA intercalative topoisomerase IIα inhibition and apoptosis induction》, and you may find the article in Bioorganic Chemistry.Computed Properties of C7H5ClN2S The information in the text is summarized as follows:

In quest of promising anticancer agents, the pharmacophores of natural (β-carboline) and synthetic origin (benzothiazole) were adjoined by a carboxamide bridge and three-point diversification was accomplished. The in vitro cytotoxic ability of the compounds was established on adherent and suspension human cancer cell lines and compounds I and II advanced as pre-eminent mols. with IC50 values of 1.46 and 1.81μM resp. in A549 cell line. The cytospecificity was entrenched for potent compounds I and II by evaluating against normal human lung epithelial cells and selectivity index was calculated Furthermore, EtBr displacement, relative viscosity and gel-based topoisomerase II target assays unveiled the intercalative topo-II inhibitory capability and DNA binding studies (absorbance) revealed the dissociation constant (Kd) for compounds I and II as 98 and 103μM resp. Addnl., cell-based flow cytometric assays like Annexin-V/PI dual staining aids in the quantification of apoptosis induced and JC-1 staining disclosed the depolarization of mitochondrial membrane potential by compound I in A549 cells in a dose-dependent manner. Moreover, wound healing assay established the inhibition of in vitro cell migration by compound I on A549 cells. In addition, mol. docking studies proved the binding of compounds I and II in the active site of DNA complexed with topo IIα and stabilized by interactions with DNA base pairs and amino acid residues. Remarkably, the compounds I and II follow Lipinski’s rule of five and are in the recommended range for Jorgensen’s rule of three with a minimal violation and other pharmacokinetic parameters revealing druggability of the synthesized hybrids. In the experiment, the researchers used 6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9Computed Properties of C7H5ClN2S)

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.Computed Properties of C7H5ClN2STheir 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

《A facile colorimetric sensor for ultrasensitive and selective detection of Lead(II) in environmental and biological samples based on intrinsic peroxidase-mimic activity of WS2 nanosheets》 was written by Tang, Yue; Hu, Yang; Yang, Yuxia; Liu, Bangyan; Wu, Yuangen. Synthetic Route of C18H24N6O6S4 And the article was included in Analytica Chimica Acta on April 15 ,2020. The article conveys some information:

Two-dimensional layered WS2 nanosheets with rich active edge exhibit intrinsic peroxidase-mimic activity, which make them an ideal material for sensor design. However, there is still lack of research on the catalysis and regulation mechanisms of the layered WS2 nanosheets as well as their application in the detection of hazardous substances. Herein, the regulatory effect of Pb(II) on the peroxidase-mimic activity of the layered WS2 nanosheets was firstly investigated, which enable us to construct a novel and facile colorimetric sensor for ultrasensitive and selective detection of Pb(II). To improve the performance of colorimetric sensor, some important parameters like buffer conditions, substrates and temperature have been investigated. Under the optimal conditions, the catalytic kinetics of layered WS2 nanosheets were extensively investigated. The peroxidase-mimic catalytic reaction was proved to be the “”ping pong”” mechanism, and the regulatory effect of Pb(II) on layered WS2 nanosheets was agreed with noncompetitive inhibition. The absorbance variation of colorimetric sensor is proportionally related to the concentration of heavy metals, which enable us to easily distinguish whether Pb(II) exceeds the permissible level in less than 20 min even by the naked eyes. The limit of detection (LOD) and the limit of quantification (LOQ) of the proposed colorimetric sensor for Pb(II) were determined as low as 4μg L-1 and 13.3μg L-1, and displays excellent selectivity against other competitive metal ions. Moreover, the further studies also validate the applicability of colorimetric sensor in several actual samples, indicating that our strategy may has prospective applications for Pb(II) detection in environment and biol. samples.ABTS Diammonium(cas: 30931-67-0Synthetic Route of C18H24N6O6S4) was used in this study.

ABTS Diammonium(cas: 30931-67-0) belongs to anime.Typically the presence of an amine functional group is deduced by a combination of techniques, including mass spectrometry as well as NMR and IR spectroscopies. 1H NMR signals for amines disappear upon treatment of the sample with D2O. In their infrared spectrum primary amines exhibit two N-H bands, whereas secondary amines exhibit only one.Synthetic Route of C18H24N6O6S4

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

Iwata, Satoru; Aoyama, Misa; Uchida, Satoshi; Tanaka, Kiyoshi published their research in Chemistry Letters on December 5 ,2012. The article was titled 《Novel 4-trifluoromethylthiazole-5-carboxylic acid as acceptor in photosensitized dyes》.Reference of 4-(Trifluoromethyl)thiazole-5-carboxylic acid The article contains the following contents:

Novel photosensitized dyes containing 4-trifluoromethylthiazole-5-carboxylic acid as an acceptor are synthesized. Stilbene-type dyes with this acceptor show high performance as dye-sensitized solar cells. The trifluoromethyl group is assumed to act as a suppressor of electron back-donation from the TiO2 conduction band to the electrolyte and as an accelerator of charge separation in the photoexcited state. After reading the article, we found that the author used 4-(Trifluoromethyl)thiazole-5-carboxylic acid(cas: 167548-89-2Reference of 4-(Trifluoromethyl)thiazole-5-carboxylic acid)

4-(Trifluoromethyl)thiazole-5-carboxylic acid(cas: 167548-89-2) is a member of organofluorine compounds. Organofluorine compounds, which have carbon-fluorine bonds, show unique features such as high thermal and chemical stability, high surface activity, no light-absorbing ability, high pharmacological effect, and so on. Owing to their specific characters, they are indispensable chemicals for industry and our daily lives.Reference of 4-(Trifluoromethyl)thiazole-5-carboxylic acid

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