Day: June 11, 2021

Research speed reading in 2021.The potential utility of systematic synthetic strategy will be applicable to efficient generations of chemical libraries of compounds to find ‘hit’ molecules. 110553-27-0, Name is 2-Methyl-4,6-bis((octylthio)methyl)phenol, belongs to thiazines compound, is a common compound. In a pantent, author is Gomha, Sobhi M., once mentioned the new application about 110553-27-0, Product Details of 110553-27-0.

SYNTHESIS OF SOME NOVEL THIAZOLE, THIADIAZOLE AND 1,4-PHENYLENE-BIS-THIAZOLE DERIVATIVES AS POTENT ANTITUMOR AGENTS

A novel series of 2-ethylidenehydrazono-5-arylazothiazoles 5a-h and 2-ethylidenehydrazono-5-arylazothiazolones 9a-d were prepared by cyclocondensation of hydrazonyl halides 3a-h and 7a-d with ethylidenethiosemicarbazide 2. In addition, reaction of 2 with N-phenyl-carbohydrazonyl chloride (14), afforded 1,3,4-thiadiazole derivative 17 as the end product. Moreover, the thiosemicarbazide derivative 2 was reacted with various bromoacetyl compounds 19a-d and 1,1′-(1,4-phenylene)bis(2-bromoethanone) (21) furnished the respective thiazole derivatives 20a-d and 1,4-phenylene-bis-thiazole derivative 22. The structures of the newly synthesized compounds were established on the basis of spectroscopic evidences and their alternative syntheses. The newly synthesized compounds were evaluated for their antitumor activities against hepatocellular carcinoma (HepG2) cell line and the results revealed promising activities of compounds 5h, 5d, 5g, 5f and 5e with IC50 equal 2.23 +/- 0.28, 2.48 +/- 0.34, 2.49 +/- 0.24, 4.03 +/- 0.11, and 5.32 +/- 0.27 mu M, respectively.

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Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem

 

Research speed reading in 2021. The prevalence of solvent effects catalysis has motivated developing quantitative kinetic, and theoretical assessments of solvent structures and their interactions with reaction intermediates and transition states. 10297-73-1, Name is 4′-(Methylsulfonyl)acetophenone, belongs to thiazines compound, is a common compound. In a pantent, author is Bresolin, Bianca-Maria, once mentioned the new application about 10297-73-1, Related Products of 10297-73-1.

Methylammonium iodo bismuthate perovskite (CH3NH3)(3)Bi2I9 as new effective visible light-responsive photocatalyst for degradation of environment pollutants

In this work, the photocatalytic activity of a new visible light-responsive (CIH3NH3)(3)Bi2I9 hybrid organic-inorganic perovskite (HOIP) was addressed for the very first time in the treatment of aqueous solutions of model organic dyes. The photocatalyst was successfully prepared by a low temperature solvo-termal method, easily reproducible. The catalyst was characterized by Fourier-transform infrared spectroscopy (FP-IR), X-ray diffraction spectrometer (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDS), X-ray photoelectron spectroscopy (XPS) techniques and UV diffuse reflectance spectrum. The efficiency of photocatalyst was tested for the removal of different type of dyes: fluorone dye (rhodamine B), thiazine dye (methylene blue) and azo dye (reactive Blue 4). Moreover, a multi-contaminated solution, with methylene blue and crystal violet (triarylmethane dye), was used to simulate a real industrial wastewater effluent. The results highlighted an increase of the photocatalytic activity respect the pristine precursor, bismuth iodide. The experiments showed that the values of removal was higher for rhodamine B respect the other dyes, with a removal of 98% after three hours under visible light irradiation. The efficiency of the photocatalyst was also confirmed under optimal conditions with high pressure liquid chromatography (HPLC). The gradual disappearance of rhodamine B peak accompanied by the appearance of by-products peaks was investigated. The stability of the photocatalyst was tested for three consecutive re-cycles. Analysis on different visible light sources was performed: halogen provided higher efficiency respect LED lamp. The outcomes of the present work aim to open the possibility of considering HOIP as a new potential photocatalyst for contaminants treatment.

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Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem

 

Research speed reading in 2021. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction by binding to a specific portion of an enzyme and thus slowing or preventing a reaction from occurring. , Category: thiazines, 82911-69-1, Name is N-(9-Fluorenylmethoxycarbonyloxy)succinimide, molecular formula is C19H15NO5, belongs to thiazines compound. In a document, author is Artym, Jolanta, introduce the new discover.

Topically applied azaphenothiazines inhibit contact sensitivity to oxazolone in mice

In this work we investigated the efficacy of two topically applied azaphenothiazine derivatives, 9-chloro-6-acetylaminobutylquinobenzo[3,2-b][1,4]thiazine (compound 4) and 6-chloroethylureido-ethyldiquino[3,2-b;2′;3′-e][1,4]thiazine (compound 5), in the amelioration of inflammatory symptoms of contact sensitivity (CS) to oxazolone in mice, in relation to the commercial ointment Protopic (R) (tacrolimus), the reference drug. The compounds were administered 24 h following elicitation of CS and, 24 h later, the parameters of inflammation, such as ear edema, blood composition, leukocyte level, numbers of cells in the draining lymph nodes, histological picture of the inflamed tissue, and the morphometric analysis, were analyzed. The study showed that the effectiveness of the studied azaphenothiazines applied as a 0.1% ointment was comparable to the reference drug regarding suppression of the inflammatory process, when all the investigated histological parameters are taken into account.

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Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem

 

Chemical Research Letters, May 2021. Redox catalysis has been broadly utilized in electrochemical synthesis. The appropriate choice of redox mediator can avoid electrode passivation, which strongly inhibit the efficient activation of substrates. 5326-23-8, Name is 6-Chloronicotinic acid, molecular formula is C6H4ClNO2. In an article, author is Krishnan, Kannan Gokula,once mentioned of 5326-23-8, Recommanded Product: 6-Chloronicotinic acid.

Hydrazide-integrated carbazoles: synthesis, computational, anticancer and molecular docking studies

A new class of carbazole-based hydrazides 6a-c, synthesized from carbazole by employing a multistep synthetic strategy, has been described. Detailed insight into their structures (6a-c) has been elucidated by UV-Vis, FT-IR and NMR (H-1 and C-13) spectroscopic studies. Theoretical investigation of the molecules 6a-c has been accomplished utilizing DFT and TD-DFT techniques with the B3LYP/6-311++G(d,p) method. Theoretical findings such as optimized structural, vibrational, and electronic properties, and proton and carbon chemical shifts of the targets 6a-c are in harmony with their experimental results and/or structurally related reported ones. Cytotoxicity of the target hydrazides 6a-c has been evaluated using human pancreatic cancer cells (AsPC1 and SW1990). The hydrazides 6a-c displayed a significant in vitro cytotoxic effect against both the pancreatic cancer cells AsPC1 (concentration that inhibits 50% cell viability, IC50: 3.42 +/- 0.41 mu M for 6a) and SW1990 (IC50: 22.42 +/- 1.40 mu M for 6a). The superior binding energy resulting from the in silico molecular docking approach of the hydrazide 6a indicates its greater affinity towards the receptor (binding energy: -8.63 kcal mol(-1) and IC50: 475.05 nM). Thus, the hydrazide 6a could serve as a new lead for the development of anticancer agents.

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Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem

 

Research speed reading in 2021. Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. catalysts provide a surface to which reactants bind in a process of adsorption. , Application In Synthesis of Sodium 4-Amino-5-hydroxy-2,7-naphthalenedisulfonate, 5460-09-3, Name is Sodium 4-Amino-5-hydroxy-2,7-naphthalenedisulfonate, molecular formula is C10H8NNaO7S2, belongs to thiazines compound. In a document, author is Zakharova, Anastasiia A., introduce the new discover.

1,3-Thiazine, 1,2,3,4-Dithiadiazole, and Thiohydrazide Derivatives Affect Lipid Bilayer Properties and Ion-Permeable Pores Induced by Antifungals

Over the past decade, thiazines, thiadiazoles, and thiohydrazides have attracted increasing attention due to their sedative, antimicrobial, antiviral, antifungal, and antitumor activities. The clinical efficacy of such drugs, as well as the possibility of developing resistance to antimicrobials, will depend on addressing a number of fundamental problems, including the role of membrane lipids during their interaction with plasma membranes. The effects of the eight 1,3- thiazine-, 1,2,3,4- dithiadiazole-, and thiohydrazide-related compounds on the physical properties of model lipid membranes and the effects on reconstituted ion channels induced by the polyene macrolide antimycotic nystatin and antifungal cyclic lipopeptides syringomycin E and fengycin were observed. We found that among the tested agents, the fluorine-containing compoundN ‘-(3,5-difluorophenyl)-benzenecarbothiohydrazide (C6) was the most effective at increasing the electric barrier for anion permeation into the hydrophobic region of the membrane and reducing the conductance of anion-permeable syringomycin pores. A decrease in the membrane boundary potential with C6 adsorption also facilitated the immersion of positively charged syringomycin molecules into the lipid bilayer and increases the pore-forming ability of the lipopeptide. Using differential scanning microcalorimetry, we showed that C6 led to disordering of membrane lipids, possibly by potentiating positive curvature stress. Therefore, we used C6 as an agonist of antifungals forming the pores that are sensitive to membrane curvature stress and lipid packing, i.e., nystatin and fengycin. The dramatic increase in transmembrane current induced by syringomycin E, nystatin, and fengycin upon C6 treatment suggests its potential in combination therapy for treating invasive fungal infections.

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Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem

 

Research speed reading in 2021. Chemistry is a science major with cience and engineering. The main research directions are chemical synthesis, new energy materials, nano-ceramics,and research on the structure and performance of functional materials. , Synthetic Route of 92-30-8, 92-30-8, Name is 2-(Trifluoromethyl)-10H-phenothiazine, molecular formula is C13H8F3NS, belongs to thiazines compound. In a document, author is Niu Liping, introduce the new discover.

Synthesis of the Fused Tetracyclic Thiazinan-4-one Derivatives and Their Anti-tumor Activitiy

The benzothiazin-4-one intermediates were prepared by the one-pot three-components condensation from the N-Boc-L-prolinal 1, amino acid ethyl/methyl ester hydrochlorides 2a similar to 2d, and mercaptobenzoic acids 3a similar to 3b. After removal of Boc, the target novel fused tetracyclic thiazinan-4-one derivatives 6 similar to 11 were afforded by the intramolecular cyclo- amidation reaction. The absolute configurations of the newly generated chiral carbon (1-C) were determined by the coupling constants of H-1 and H-2 and the X-ray crystallographic structures. The tetracyclic alkaloids were examined for their anti-proliferative activity against Hela and A549 tumor cells. The results showed that some compounds could moderately inhibit the growth of Hela cells, and among them, (13aR, 13bR)-1,2,3,13b-tetrahydrobenzo[e]pyrrolo[2′, 1′: 3,4] pyrazino[2,1b][1,3] thiazine-5,8(6H, 13aH)-dione (6b) was the best one with the IC50 value of 9.50 mu mol/L. However, all the compounds showed no anti-tumor activity against A549.

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Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem

 

Research speed reading in 2021. In classical electrochemical theory, both the electron transfer rate and the adsorption of reactants at the electrode control the electrochemical reaction. 5460-09-3, Name is Sodium 4-Amino-5-hydroxy-2,7-naphthalenedisulfonate, belongs to thiazines compound, is a common compound. In a pantent, author is Mollo, Maria C., once mentioned the new application about 5460-09-3, Application of 5460-09-3.

Microwave-Assisted Synthesis of 2-Substituted 2-Thiazolines and 5,6-Dihydro-4 H -1,3-thiazines

An efficient and general method for the synthesis of 2-substituted thiazolines and 5,6-dihydro-4 H -1,3-thiazines is developed via microwave-assisted ring closure of omega -thioamidoalcohols promoted by ethyl polyphosphate (PPE). The cyclization reaction involves an S (N) 2-type mechanism and features the advantages of very short reaction times, high yields and a predictable stereochemical outcome. The acyclic precursors are prepared in high overall yields by an improved diacylation-thionation-saponification sequence from commercially available omega -aminoalcohols. The whole process is metal-free and operationally simple.

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Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem

 

Chemical Research Letters, May 2021. Redox catalysis has been broadly utilized in electrochemical synthesis. The appropriate choice of redox mediator can avoid electrode passivation, which strongly inhibit the efficient activation of substrates. 20277-69-4, Name is Sodium methanesulfinate, molecular formula is CH3NaO2S. In an article, author is Deka, Manash J.,once mentioned of 20277-69-4, Formula: https://www.ambeed.com/products/20277-69-4.html.

Synthesis of Five-, Six-, and Seven-Membered 1,3-and 1,4-Heterocyclic Compounds via Intramolecular Hydroalkoxylation/Hydrothioalkoxylation of Alkenols/Thioalkenols

Intramolecular hydroalkoxylation/hydrothioalkoxylation of nitrogen-tethered alkenes and alcohols/thiols mediated by boron trifluoride etherate leads to five-membered thiazolidine, six-membered 1,4-oxazines (morpholines) and tetrahydro-2H-1,4-thiazines (thiomorpholines), and seven-membered 1,4-oxazepanes in good yields.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 20277-69-4, in my other articles. Formula: https://www.ambeed.com/products/20277-69-4.html.

Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem

 

Research speed reading in 2021. In classical electrochemical theory, both the electron transfer rate and the adsorption of reactants at the electrode control the electrochemical reaction. 5872-08-2, Name is (7,7-Dimethyl-2-oxobicyclo[2.2.1]heptan-1-yl)methanesulfonic acid, belongs to thiazines compound, is a common compound. In a pantent, author is Dandia, Anshu, once mentioned the new application about 5872-08-2, HPLC of Formula: https://www.ambeed.com/products/5872-08-2.html.

A rational eco-compatible design strategy for regio- and diastereoselective synthesis of novel dispiropyrrolidine/thiapyrrolizidine hybrids

A facile regio- and stereoselective synthesis of novel dispiroheterocyclic hybrids containing benzo[1,4]oxazine/benzo[1,4]thiazine and pyrrolidine/thiapyrrolizidine moieties via 1,3-dipolar cycloaddition reaction was carried out. The reaction has been carried out using 2,2,2-trifluoroethanol as a new alternative green solvent and catalyst for rapid access to construct a diversity-oriented library of regioselectivity dispiropyrrolidine/thiapyrrolizidines. Mild reaction conditions with excellent conversion, higher yields in shorter reaction times and the easy recyclability of 2,2,2-trifluoroethanol makes this protocol attractive, sustainable and environmentally benign. (C) 2015 Elsevier Ltd. All rights reserved.

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Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem

 

New Advances in Chemical Research, May 2021.Chemistry is a science major with cience and engineering. The main research directions are chemical synthesis, new energy materials, nano-ceramics, preparation and modification of special coatings. 5872-08-2, Name is (7,7-Dimethyl-2-oxobicyclo[2.2.1]heptan-1-yl)methanesulfonic acid, belongs to thiazines compound, is a common compound. In a pantent, author is Fodor, Kinga Judit, once mentioned the new application about 5872-08-2, Reference of 5872-08-2.

Synthesis, Structural Elucidation, Cyclic Voltammetry, and Theoretical Modelling of 2-Ferrocenyl-4H-benzo[e][1,3]thiazines and 2-Aryl-4H-ferroceno[e][1,3]thiazines

2-Ferrocenyl-4H-benzo[e][1,3]thiazine and its 6,7-dimethoxy derivative were prepared by a Bischler-Napieralski-type annulation of the Mannich adducts of ferrocenecarboxamide, formaldehyde, and the corresponding thiophenol. A more efficient synthetic pathway, comprising a directed lithiation/iodination sequence followed by standard functional-group transformations and a final copper-catalyzed cyclization, was elaborated to convert [(dimethylamino)methyl]ferrocene into racemic mixtures of the first representatives of planar-chiral 4H-ferroceno[e][1,3]thiazines. A similar strategy with 2-iodobenzyl bromide as the precursor enabled a highly improved synthesis of 2-ferrocenyl-4H-benzo[e][1,3]thiazine. The relative tendency of the new ferrocene-based thiazines, composed of potential redox sites assembled in different molecular architectures, to behave as donors in single-electron transfer (SET) reactions was studied by cyclic voltammetry (CV) and DFT calculations. The results disclosed that 2-ferrocenyl-4H-ferroceno[e][1,3]thiazine can undergo two consecutive redox steps and is the most efficient reductant among the prepared models; it has the lowest first half-cell potential, the highest-energy highest occupied molecular orbital (HOMO) concentrated on the fused metallocene unit and the lowest first ionization energy.

Reference of 5872-08-2, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 5872-08-2.

Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem