Tag: M.W:200-300

Simple exploration of 2,3-Dibromobenzo[b]thiophene

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Synthesis and Reactions of 2,3,5,6-Tetrahydro-2,5-ethano-3-benzazocin-4(1H)-one and a Thieno-extended Analogue: X-Ray Structure of 3-Methyl-2,3,5,6-tetrahydro-2,5-ethano<1>benzothieno<3,2-d>azocin-4(1H)-one

5,6,7,8,9,10-Hexahydro-6,9-methanobenzocyclo-octen-11-one (3) was prepared through condensation of o-xylene-alpha,alpha’-diyl dibromide with N-cyclopentylidenepyrrolidine and converted by Beckmann rearrangement of its oxime (4) into 2,3,5,6-tetrahydro-2,5-ethano-3-benzazocin-4(1H)-one (6). 2,3-Bis(bromomethyl)benzothiophene was converted similarly into a mixture of 1,4,5,6-tetrahydro-2,5-ethano<1>benzothieno<2.3-d>azocin-3(2H)-one (15) and the isomeric lactam (19).Lactam (6) was N-methylated and both the parent lactam (6) and the N-methyl derivative (23) were reducedwith lithium aluminium hydride to the saturated products (24) and (25), respectively.Conversion of lactam (6) into the corresponding thiolactam (26) with phosphorus pentasulphide followed by alkylation of the latter compound gave an N-(29) or S-alkylated derivative, (27) or (28), depending on the reagent and reaction conditions.Similar reactions are reported also for lactams (15) and (19).The 4(1H)-one structures of compounds (15) – (22) are based on an X-ray analysis of 3-methyl-2,3,5,6-tetrahydro-2,5-ethano<1>benzothieno<3,2-d>azocin-4(1H)-one (20).We also report syntheses of 2-azido-5,6,7,8,9,10-hexahydro-6,9-methanobenzocyclo-octen-11-one (33) and 3-nitro(and 1,3-dinitro)-6,7,8,9,10,11-hexahydro-7,10-methanocyclo-octa<1>benzothiophen-12-one, (36) and (37), respectively.

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Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

 

More research is needed about 63675-74-1

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Visible light photocatalytic synthesis of benzothiophenes

The photocatalytic reaction of o-methylthio-arenediazonium salts with alkynes yields substituted benzothiophenes regioselectively through a radical annulation process. Green light irradiation of eosin Y initiates the photoredox catalysis. The scope of the reaction was investigated by using various substituted diazonium salts and different alkynes.

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Can You Really Do Chemisty Experiments About 7-Chloro-3-hydroxybenzo[b]thiophene-2-carboxylic acid

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One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Product Details of 90407-11-7, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 90407-11-7, Name is 7-Chloro-3-hydroxybenzo[b]thiophene-2-carboxylic acid, molecular formula is C9H5ClO3S

7-Substituted Benzothiophenes and 1,2-Benzisothiazoles. Part 2. Chloro and Nitro Derivatives

The 7-chloro and 7-nitro derivatives of benzothiophene and 1,2-benzisothiazole have been prepared from readily available precursors, which for each substituent are common to both ring systems. 7-Chlorobenzothiophene has been obtained from 3-chloro-2-mercaptobenzoic acid via 7-chlorobenzothiophen-3(2H)-one, or from 2,3-dichlorobenzaldehyde, either via beta-(2,3-dichlorophenyl)-alpha-mercaptoacrylic acid (16) or, preferably, via 7-chlorobenzothiophene-2-carboxylic acid.Hexamethylphosphoric triamide is a particularly useful solvent in which to effect the selective nucleophilic replacement of the 2-chloro substituent in 2,3-dichlorobenzaldehyde. 7-Chloro-1,2-benzisothiazole is available by treatment of 3-chloro-2-mercaptobenzaldehyde with chloramine (57percent), or by heating 2,3-dichlorobenzaldehyde with sulphur and aqueous ammonia (46percent). 7-Nitrobenzothiophene has been obtained by treatment of 2-bromo-3-nitrobenzaldehyde with mercaptoacetic acid under alkaline conditions, followed by decarboxylation of the resulting 2-carboxylic acid.Cyclisation of 2-(n- or t-butylthio)-3-nitrobenzaldoxime with polyphosphoric acid gives 7-nitro-1,2-benzisothiazole in high yield. 3-Nitro-2-t-bytylthiobenzaldehyde behaves unexpectedly with chloramine, to give what is believed to be 7-nitro-2-t-butyl-1,2-benzothiazolium chloride (24) (73percent).

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Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

 

Awesome and Easy Science Experiments about 3-(Bromomethyl)benzo[b]thiophene

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Electric Literature of 1196-19-6, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.1196-19-6, Name is 3-(Bromomethyl)benzo[b]thiophene, molecular formula is C9H7BrS. In a Article£¬once mentioned of 1196-19-6

[1]Benzothienoindolizidinones and [1]Benzothienoquinolizidinones: Synthesis and Schmidt rearrangement into [1,3]diazepines derivatives

[1]Benzothienoindolizidinones 5ac,ae,bc and [1]Benzothienoquinolizidinone 5ad were synthesized from 2(3)-bromethyl[1]benzothiophene and methyl prolinate, methyl oxoprolinate and ethyl pipecolinate. The Schmidt rearrangement of ketones 5 led exclusively to the [1,3]diazepines derivatives 6.

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Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

 

The Absolute Best Science Experiment for 4923-87-9

We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 4923-87-9, and how the biochemistry of the body works.Safety of 5-Bromobenzothiophene

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 4923-87-9, name is 5-Bromobenzothiophene, introducing its new discovery. Safety of 5-Bromobenzothiophene

Catalyst shuttling enabled by a thermoresponsive polymeric ligand: Facilitating efficient cross-couplings with continuously recyclable ppm levels of palladium

A polymeric monophosphine ligand WePhos has been synthesized and complexed with palladium(ii) acetate [Pd(OAc)2] to generate a thermoresponsive pre-catalyst that can shuttle between water and organic phases, with the change being regulated by temperature. The structure of the polymeric ligand was confirmed with matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) mass spectrometry and size-exclusion chromatography (SEC) analysis, as well as nuclear magnetic resonance (NMR) measurements. This polymeric metal complex enables highly efficient Pd-catalyzed cross-couplings and tandem reactions using 50 to 500 ppm palladium, and this can facilitate reactions that are tolerant to a broad spectrum of (hetero)aryl substrates and functional groups, as demonstrated with 73 examples with up to 99% isolated yields. Notably, 97% Pd remained in the aqueous phase after 10 runs of catalyst recycling experiments, as determined via inductively coupled plasma-atomic emission spectrometry (ICP-AES) measurements, indicating highly efficient catalyst transfer. Furthermore, a continuous catalyst recycling approach has been successfully developed based on flow chemistry in combination with the catalyst shuttling behavior, allowing Suzuki-Miyaura couplings to be conducted at gram-scales with as little as 10 ppm Pd loading. Given the significance of transition-metal catalyzed cross-coupling and increasing interest in sustainable chemistry, this work is an important step towards the development of a responsive catalyst, in addition to having high activity, by tuning the structures of the ligands using polymer science.

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Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

 

Awesome Chemistry Experiments For 6-Methoxy-2-(4-methoxyphenyl)-1-benzothiophene

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Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. HPLC of Formula: C16H14O2S. Introducing a new discovery about 63675-74-1, Name is 6-Methoxy-2-(4-methoxyphenyl)-1-benzothiophene

Description anti-mitotic agents which inhibit tubulin polymerization

Methoxy and ethoxy substituted 3-aroyl-2-arylbenzo[b]thiophenes and benzo[b]thiophene analogues are described for use in inhibiting tubulin polymerization. The compounds’ use for treating tumor cells is also described. Additional aspects described here are certain diaryl ether benzo[b]thiophene derivatives. Also described are particular analogs derived from dihydronaphthalene which have proven particularly effective. Certain new benzofuran analogs are described, as well as certain sulfur oxide benzo[b]thiophene analogs. Important compounds described herein include the first nitrogen-containing derivatives of combretastatin. These include nitro, amino and azide combrdtastatin derivatives.

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Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

 

Top Picks: new discover of Methyl 4-bromobenzo[b]thiophene-2-carboxylate

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Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Product Details of 360575-29-7. Introducing a new discovery about 360575-29-7, Name is Methyl 4-bromobenzo[b]thiophene-2-carboxylate

Antiparasitic, anti-inflammatory and cytotoxic activities of 2D coordination polymers based on 1H-indazole-5-carboxylic acid

We report on the formation of two novel multifunctional isomorphous (4,4) square-grid 2D coordination polymers based on 1H-indazole-5-carboxylic acid. To the best of our knowledge, these complexes are the first examples of 2D-coordination polymers constructed with this novel ligand. We have analysed in detail the structural, magnetic and anti-parasitic properties of the resulting materials. In addition, the capability of inhibiting nitric oxide production from macrophage cells has been measured and was used as an indirect measure of the anti-inflammatory response. Finally, the photocatalytic activity was measured with a model pollutant, i.e. vanillic acid (phenolic compound), with the aim of further increasing the functionalities and applicability of the compounds.

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Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

 

Brief introduction of tert-Butyl benzo[b]thiophen-2-ylcarbamate

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Study of the Reactivity of Ketone Enolates with 3-Halo-2-amino Derivatives of Benzothiophene under Photostimulated SRN1 Reaction Conditions

Reactivity of the 3-halo-2-amino derivatives of benzothiophene 1a-c and 2 with several ketone enolates 3-5 have been studied under photostimulated SRN1 reaction conditions.The normal substitution product 6 only was obtained in low yields using potassioacetophenone 3 as the enolate ion and 2-(tert-butoxycarbonylamino)-3-chlorobenzothiophene (1a) and 2-(tert-butoxycarbonylamino)-3-iodobenzothiophene (1c) as substrates.In all reactions the main product was the corresponding dehalogenated substrate 7a-b, thus indicating that reduction of the substrate strongly competes with the desired substitution reaction.

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Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

 

Simple exploration of 26018-73-5

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Related Products of 26018-73-5, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 26018-73-5, Name is 6-Chlorobenzo[b]thiophene-2-carboxylic acid, molecular formula is C9H5ClO2S. In a Article£¬once mentioned of 26018-73-5

Synthesis of Antileukemic Indolylvinyl-1-benzofurans and -benzothiophenes

2-<2-(Indol-2-yl)vinyl>-1-benzofuran and -benzothiophene compounds 6-13 and 18-22 with terminal amidinium or imidazolinium groups were synthesized; in their antileukemic activity in mice they surpass the isosteric 2,2′-vinylenebis(1-benzofuran) and -(benzo-thiophene) compounds.

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Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

 

Top Picks: new discover of 4923-87-9

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In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Recommanded Product: 4923-87-9, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 4923-87-9, name is 5-Bromobenzothiophene. In an article£¬Which mentioned a new discovery about 4923-87-9

A Class of Amide Ligands Enable Cu-Catalyzed Coupling of (Hetero)aryl Halides with Sulfinic Acid Salts under Mild Conditions

The amide derived from 4-hydroxy-l-proline and 2,6-dimethylaniline is a powerful ligand for Cu-catalyzed coupling of (hetero)aryl halides with sulfinic acid salts, allowing the formation of a wide range of (hetero)aryl sulfones from the corresponding (hetero)aryl halides at considerably low catalytic loadings. The coupling of (hetero)aryl iodides and sodium methanesulfinate proceeds at room temperature with only 0.5 mol % CuI and ligand, representing the first example for Cu-catalyzed arylation at both low catalytic loading and room temperature.

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Reference£º
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem