Month: October 2022

《Comparative evaluation of laccase mediated oxidized and unoxidized lignin of sugarcane bagasse for the synthesis of lignin-based formaldehyde resin》 was written by Akhil; Devendra, Leena P.; Sukumaran, Rajeev K.. Application of 30931-67-0 And the article was included in Industrial Crops and Products on August 31 ,2020. The article conveys some information:

Pretreatment using dilute acid is one of the strategies employed in a lignocellulosic biorefinery. The current study deals with the isolation, characterization, and oxidation of lignin from the enzymic residue of acid pre-treated sugarcane bagasse. The study also focused on evaluating the reactivity of Laccase mediated oxidized lignin with the non-oxidized one for the preparation of lignin-based formaldehyde (LF) resin. In the current study, 100% phenolic lignin was utilized for the synthesis of LF resin. Three different approaches (Alk. hydrolysis, mild acidolysis & organosolv) have been employed to evaluate the effect of isolation method on the physicochem. properties of lignin. The isolation method had a bearing on the properties of lignin and its reactivity towards formaldehyde for the synthesis of LF resin. Alkali and organosolv lignin were found as promising candidates for the preparation of LF resin. Oxidized lignin exhibited better reactivity than the non-oxidized one. The experimental part of the paper was very detailed, including the reaction process of ABTS Diammonium(cas: 30931-67-0Application of 30931-67-0)

ABTS Diammonium(cas: 30931-67-0) belongs to anime. Many important products require amines as part of their syntheses. Methylamine is utilized in the production of the analgesic meperidine (trade name Demerol) and the photographic developer Metol (trademark), and dimethylamine is used in the synthesis of the antihistamine diphenhydramine (trade name Benadryl), the solvent dimethylformamide (DMF), and the rocket propellant 1,1-dimethylhydrazine. The synthesis of the insect repellent N,N-diethyl-m-toluamide (DEET) incorporates diethylamine while that of the synthetic fibre Kevlar requires aromatic amines.Application of 30931-67-0

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

In 2021,Heterocyclic Letters included an article by Prajapat, Prakash; Pappula, Venkata Narayana; Vaghani, Hasit; Agarwal, Shikha; Samota, Jayanti; Talesara, Ganpat L.. Name: 6-Chlorobenzothiazol-2-ylamine. The article was titled 《Synthesis of biologically potent alkoxyphthalimido plugged N-(2,4-dioxo-1,4-dihydroquinazolin)-3(2H)-yl)-4-oxo-4H-benzo[4,5]thiazolo[3,2-a]pyrimidine-3-carboxamide via Gould Jacobs reaction》. The information in the text is summarized as follows:

Convenient methods for the synthesis of new alkoxyphthalimidoquinazolinedione and their pyrimidobenzothiazole derivatives I [R1 = H, Cl, O2N; R2 = H, 2-(1,3-dioxoisoindolin-2-yl)oxyethyl] were reported. A series of benzothiazolopyrimidine-3-carboxamides I were prepared starting from substituted 2-aminobenzothiazoles via solvent free multi-component Gould-Jacobs reaction. Structures of newly synthesized compounds were established based on IR, 1H-NMR, mass, anal. studies and fluorescence tests. Some of synthesized mols. I were assayed for their antimalarial activity. IC50 values of antimalarial activity of compounds were also determined The results came from multiple reactions, including the reaction of 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-ylamineThe 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

The author of 《Organocatalytic asymmetric synthesis of benzothiazolopyrimidines via a [4+2] cycloaddition of azlactones with 2-benzothiazolimines》 were Ke, Chaoqi; Liu, Zhenzhong; Ruan, Sai; Feng, Xiaoming; Liu, Xiaohua. And the article was published in Organic Chemistry Frontiers in 2021. Safety of 6-Chlorobenzothiazol-2-ylamine The author mentioned the following in the article:

An easily available L-proline-derived guanidine-amide were found to be efficient at catalyzing a [4+2] cycloaddition of azlactones with 2-benzothiazolimines by affording various benzothiazolopyrimidines bearing adjacent tertiary and quaternary stereogenic centers in excellent yields at 2 mol% loading. The diastereoisomers of the main adducts differed from those in a previous bifunctional organocatalytic system. In the experiment, the researchers used 6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9Safety of 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.Safety of 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

Walker, Erin Joanne; Heydet, Deborah; Veldre, Timothy; Ghildyal, Reena published their research in Scientific Reports on December 31 ,2019. The article was titled 《Transcriptomic changes during TGF-β-mediated differentiation of airway fibroblasts to myofibroblasts》.Formula: C7H5ClN2S The article contains the following contents:

In this study, we have used next generation sequencing to delineate changes in transcriptome induced by TGF-β treatment of WI-38 airway fibroblasts in both short term and after differentiation into myofibroblasts. The data obtained from RNAseq anal. was confirmed by quant. PCR and protein expression by western blotting. We found that genes coding for intermediates in TGF-β signalling pathways (SMADs) were differentially expressed after TGF-β treatment, SMAD2 being upregulated and SMAD3 being downregulated. Genes involved in cytoskeletal pathways (FN1, LAMA, ITGB1) were upregulated in myofibroblasts. Genes that were previously shown to be changed in asthmatic lungs (ADAMTS1, DSP, TIMPs, MMPs) were similarly differentially expressed in myofibroblasts, strongly suggesting that TGF-β mediated differentiation of fibroblasts to myofibroblasts may underlie important changes in the asthmatic airway. We also identified new intermediates of signalling pathways (PKB, PTEN) that are changed in myofibroblasts compared to fibroblasts. We have found a significant number of genes that are altered after TGF-β induced transdifferentiation of WI-38 fibroblasts into myofibroblasts, many of which were expected or predicted. We also identified novel genes and pathways that were affected after TGF-β treatment, suggesting addnl. pathways are activated during the transition between fibroblasts and myofibroblasts and may contribute to the asthma phenotype. In the part of experimental materials, we found many familiar compounds, such as 6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9Formula: 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.Formula: 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

In 2014,Liu, X. W.; Zhang, H.; Yang, Y. J.; Li, J. Y.; Li, B.; Zhou, X. Z.; Zhang, J. Y. published 《Synthesis, antibacterial evaluation and molecular docking study of nitazoxanide analogues》.Asian Journal of Chemistry published the findings.Reference of 5-Bromothiazol-2-amine The information in the text is summarized as follows:

A series of nitazoxanide analogs I, II (R = 2,4-F2, 3,4-F2, 2-CF3, 4-CF3; X = NO2, Cl, Br) were synthesized. The antibacterial activities of synthesized compounds against Clostridium difficile were evaluated and I (R = 4-CF3) was the most promising compound The preliminary results showed that compounds containing nitro-substituted thiazole ring displayed notable activities. Compounds with thiazole moiety replaced by a pyrimidine ring exhibited moderate activities. Mol. docking study of nitazoxanide and I (R = 4-CF3) with pyruvate ferredoxin oxidoreductase suggested that the nitro group interacts with thiamine pyrophosphate and surrounding amino acids, which were almost same compared with pyruvate. The results revealed that nitazoxanide may be a competitive inhibitor of pyruvate and nitro-group is necessary for thiazolide’s activities against anaerobic organisms containing pyruvate ferredoxin oxidoreductase enzyme. In the experiment, the researchers used many compounds, for example, 5-Bromothiazol-2-amine(cas: 3034-22-8Reference of 5-Bromothiazol-2-amine)

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

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

de Oliveira Lima Filho, Edson; Malvestiti, Ivani published their research in ACS Omega on December 29 ,2020. The article was titled 《Mechanochemical Thiocyanation of Aryl Compounds via C-H Functionalization》.Synthetic Route of C7H5ClN2S The article contains the following contents:

Aryl thiocyanate compounds are important building blocks for the synthesis of bioactive compounds and intermediates for several functional groups. Reported thiocyanation reactions via C-H functionalization have limited substrate scope and low RME. The ball-milling method reported here uses ammonium persulfate and ammonium thiocyanate as reagents and silica as a grinding auxiliary. It afforded aryl thiocyanates with moderate to excellent yields for a wide variety of aryl compounds (36 examples, 8-96% yield), such as anilines, phenols, anisoles, thioanisole, and indole, thus tolerating substrates with sensitive functional groups. New products such as benzo[d][1,3]oxathiol-2-ones were obtained with C-4 substituted phenols. Thus, to our knowledge, we report, for the first time, aryl thiocyanation reaction by ball-milling at room temperature and solvent-free conditions, with short reaction times and no workup. Anal. of several mass-based green metrics indicates that it is an efficient greener method.6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9Synthetic Route of C7H5ClN2S) 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.Synthetic Route of C7H5ClN2SThe 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

The author of 《Synthesis, structure and reactivity with phosphines of Hg(II) ortho-cyano-aminothiophenolate complexes formed via C-S bond cleavage and dehydrogenation of 2-aminobenzothiazoles》 were Al-Jibori, Subhi A.; Irzoqi, Ahmed A.; Al-Janabi, Ahmed S. M.; Al-Nassiry, Amenah I. A.; Basak-Modi, Sucharita; Ghosh, Shishir; Wagner, Christoph; Hogarth, Graeme. And the article was published in Dalton Transactions in 2022. Synthetic Route of C7H5ClN2S The author mentioned the following in the article:

Addition of 2-aminobenzothiazole (abt) and substituted derivatives to Hg(OAc)2 leads to the high yield formation of ortho-cyano-aminothiophenolate (ocap) complexes [Hg{SC6H3XN(CN)}]n (X = H, Me, Cl, Br, NO2) resulting from dehydrogenation and C-S bond cleavage. The reaction appears to be unique to Hg(OAc)2 and with HgCl2 the product [HgCl2(abt)]n contains an intact abt ligand, but reacts with acetate to afford the ocap complex [Hg{SC6H4N(CN)}]n. Binding of abt to Hg(II) was previously probed in mol. structures of [Hg(sac)2(abt)L] (L = MeOH, DMSO) and these were reexamined to understand the perturbation of abt upon coordination. When the reaction of abt and Hg(OAc)2 was carried out at low temperatures the intermediate [Hg(κ2-OAc)(EtOH)(μ-HNCNSC6H4)]2 was isolated resulting from a single ligand deprotonation thus allowing a mechanism for ring-opening to be proposed. Reactions of [Hg{SC6H3XN(CN)}]n with mono- and bidentate phosphines were studied, affording a series of complexes in which the ocap ligands adopt four different binding modes in the solid state, as shown by a number of crystallog. studies. In all, the ligand chelates to a single mercury center but spans to the second via either: (i) a simple S,N-chelate, (ii) coordination through nitrogen of the CN group, (iii) the sulfur acting as a thiolate-bridge, (iv) both thiolate bridging and cyanide coordination. With PPh3 two different binding modes are seen in complexes [Hg{SC6H3XN(CN)}(PPh3)]2 being dependant upon the nature of the arene-substituent, while addition of excess PPh3 affords mononuclear [Hg{SC6H3XN(CN)}(PPh3)2]. With dppm, binuclear [Hg{SC6H3XN(CN)}(κ1-dppm)]2 result in which the diphosphine binds in a monodentate fashion. With the more flexible diphosphines, dppe and dppb, coordination polymers [Hg{SC6H3XN(CN)}(κ1,κ1-diphosphine)]n result in which ocap binds in a simple chelate fashion. Somewhat unexpectedly, with dppp, binuclear complexes [Hg2{SC6H3XN(CN)}2(μ,κ1,κ1-dppp)] result in which two diphosphines bridge the Hg2 center, while with dppf mononuclear chelates are proposed to result. Thus, the simple and high-yielding ring-opening of 2-aminobenzothiazole and substituted derivatives by mercuric acetate provides ready access to a range of novel ortho-cyano-aminothiophenolate complexes, being shown to be a highly versatile ligand that can adopt a number of different coordination modes. In the part of experimental materials, we found many familiar compounds, such as 6-Chlorobenzothiazol-2-ylamine(cas: 95-24-9Synthetic Route 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.Synthetic Route 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

Wu, Dingsheng; Lv, Pengfei; Feng, Quan; Jiang, Yu; Yang, Hanrui; Alfred, Mensah; Wei, Qufu published an article in Bioresource Technology. The title of the article was 《Biomass-derived nanocellulose aerogel enable highly efficient immobilization of laccase for the degradation of organic pollutants》.Electric Literature of C18H24N6O6S4 The author mentioned the following in the article:

Laccase is a promising biocatalyst for pollutant degradation and water purification However, laccase can only improve the stability of enzyme activity and achieve its significant catalytic effect after effective immobilization. Herein, we report a general strategy to integrate nanocellulose aerogel and laccase for high-efficiency degradation of organic pollutants. Biomass-derived functional bacterial cellulose (BC) aerogel with a nanonetwork structure and high porosity was prepared by biosynthesis, solvent replacement, and atom transfer radical polymerization (ATRP) procedures. Subsequently, a biocatalyst platform was fabricated by “”coupling”” ATRP-modified BC aerogel with abundant active sites with laccase through ion coordination. The results demonstrated the biocatalyst platform not only has good biol. affinity, but also has high enzyme load and structural stability. Meanwhile, the degradation rates of reactive red X-3B and 2, 4-dichlorophenol reached 94.5% and 85.2% within 4 h, resp. The strategy disclosed herein could provide a practical method for the degradation of organic pollutants. The experimental process involved the reaction of ABTS Diammonium(cas: 30931-67-0Electric Literature 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.Electric Literature of C18H24N6O6S4

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

Formula: C3H3BrN2SIn 2014 ,《Structure-Function Relationship of Thiazolide-Induced Apoptosis in Colorectal Tumor Cells》 was published in ACS Chemical Biology. The article was written by Brockmann, Anette; Strittmatter, Tobias; May, Sarah; Stemmer, Kerstin; Marx, Andreas; Brunner, Thomas. The article contains the following contents:

Thiazolides are a novel class of anti-infectious agents against intestinal intracellular and extracellular protozoan parasites, bacteria, and viruses. While the parent compound nitazoxanide (NTZ; 2-(acetolyloxy)-N-(5-nitro-2-thiazolyl)benzamide) has potent antimicrobial activity, the bromo-thiazolide RM4819 (N-(5-bromothiazol-2-yl)-2-hydroxy-3-methylbenzamide) shows only reduced activity. Interestingly, both mols. are able to induce cell death in colon carcinoma cell lines, indicating that the mol. target in intestinal pathogens and in colon cancer cells is different. The detoxification enzyme glutathione S-transferase of class Pi 1 (GSTP1) is frequently overexpressed in various tumors, including colon carcinomas, and limits the efficacy of antitumor chemotherapeutic drugs due to its detoxifying activities. In colorectal tumor cells RM4819 has been shown to interact with GSTP1, and GSTP1 enzymic activity is required for thiazolide-induced apoptosis. At present it is unclear which mol. structures of RM4819 are required to interact with GSTP1 and to induce cell death in colon carcinoma cell lines. Here, we demonstrate that novel thiazolide derivatives with variation in their substituents of the benzene ring do not significantly affect apoptosis induction in Caco-2 cells, whereas removal of the bromide atom on the thiazole ring leads to a strong reduction of cell death induction in colon cancer cells. We further show that active thiazolides require caspase activation and GSTP1 expression in order to induce apoptosis. We demonstrate that increased glutathione (GSH) levels sensitize colon cancer cells to thiazolides, indicating that both GSTP1 enzymic activity as well as GSH levels are critical factors in thiazolide-induced cell death. After reading the article, we found that the author used 5-Bromothiazol-2-amine(cas: 3034-22-8Formula: C3H3BrN2S)

5-Bromothiazol-2-amine(cas: 3034-22-8) belongs to anime. The reaction of alkyl halides, R―X, where X is a halogen, or analogous reagents with ammonia (or amines) is useful with certain compounds. Not all alkyl halides are effective reagents; the reaction is sluggish with secondary alkyl groups and fails with tertiary ones. Its usefulness is largely confined to primary alkyl halides (those having two hydrogen atoms on the reacting site).Formula: C3H3BrN2S

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

The author of 《Influence of nano titanium dioxide and clove oil on chitosan-starch film characteristics》 were Li, Wei; Zheng, Kewang; Chen, Hujian; Feng, Shirong; Wang, Wei; Qin, Caiqin. And the article was published in Polymers (Basel, Switzerland) in 2019. Safety of ABTS Diammonium The author mentioned the following in the article:

The combined effects of nano titanium dioxide (TiO2-N) and clove oil (CO) on the physico-chem., biol. and structural properties of chitosan (CH)/starch (ST) films were investigated by using a solvent casting method. Results indicated that the incorporation of TiO2-N could improve the compactness of the film, increase the tensile strength (TS) and antioxidant activity, and decrease the water vapor permeability (WVP). As may be expected, the incorporation of CO into the film matrix decreased TS but increased the hydrophobicity as well as water vapor barrier antimicrobial and antioxidant properties. Fourier-transform IR spectroscopy (FTIR) data supported intermol. interactions between TiO2-N, CO and the film matrix. Use of a scanning electron microscope (SEM) showed that TiO2-N and CO were well dispersed and emulsified in the film network. Thermogravimetric (TG) and derivative thermogravimetric (DTG) curves demonstrated that TiO2-N and CO were well embedded in the film matrix, hence this blend film system could provide new formulation options for food packaging materials in the future. In the experiment, the researchers used ABTS Diammonium(cas: 30931-67-0Safety of ABTS Diammonium)

ABTS Diammonium(cas: 30931-67-0) belongs to anime. Amines have a free lone pair with which they can coordinate to metal centers. Amine–metal bonds are weaker because amines are incapable of backbonding, but they are still important for sensing applications.While stronger than hydrogen bonds, amine–metal bonds are still weaker than both covalent and ionic bonds.Safety of ABTS Diammonium

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