Tag: 200-300

“Lock and Key Control” of Photochromic Reactivity by Controlling the Oxidation/Reduction State was written by Li, Xiaochuan;Ma, Yuzhen;Wang, Bingcai;Li, Gongan. And the article was included in Organic Letters in 2008.Related Products of 6287-82-7 This article mentions the following:

A photochem. active triangle terarylene was synthesized and the photochromic behavior was investigated. Its photochromic reactivity can be strongly suppressed by selected oxidization of the sulfur atoms in the mols. Reactivated photochromic reactivity was obtained by deoxidization of the S,S-dioxide moieties. The suppressed photoactivity of the oxidation state was attributed to the stronger intramol. hydrogen bonding interactions. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Related Products of 6287-82-7).

2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7) belongs to benzothiophene derivatives. Benzothiophene is used as starting material for the synthesis of bioactive molecules. The core structure is a part of various pharmaceutical substances and natural products. The different substitution patterns in these heterocycles offer new opportunities for drug discovery and other applications in materials science.Related Products of 6287-82-7

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Toward Soluble 5,10-Diheterotruxenes: Synthesis and Reactivity of 5,10-Dioxatruxenes, 5,10-Dithiatruxenes, and 5,10-Diazatruxenes was written by Gorski, Krzysztof;Mech-Piskorz, Justyna;Lesniewska, Barbara;Pietraszkiewicz, Oksana;Pietraszkiewicz, Marek. And the article was included in Journal of Organic Chemistry in 2020.Formula: C8H4Br2S This article mentions the following:

The following work presents three general approaches allowing, for the first time, the synthesis of 5,10-diheterotruxene derivatives I (x = O, S, NEt) containing two identical heteroatoms, namely, oxygen OOC, nitrogen NNC, or sulfur SSC. Two of described pathways involve the photocyclization of the corresponding triene II as a key step leading to a heptacyclic aromatic system. The third approach is based on the acidic condensation between ninhydrin and benzo[b]heteroole III. Typical functionalizations of the 5,10-diheterotruxenes I core have also been presented. In addition, the article discusses the advantages and limitations of the three suggested paths for receiving specific 5,10-diheterotruxene derivatives I because the universal method suitable for obtaining mols. with any type of heteroatoms is not known so far. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Formula: C8H4Br2S).

2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7) belongs to benzothiophene derivatives. Functionalized benzothiophenes are important constructs found in molecules with wide ranging biological activity and in organic materials. Its aromaticity makes it relatively stable, although as a heterocycle, it has reactive sites which allow for functionalization.Formula: C8H4Br2S

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Polymerization of thiophene derivatives. IV. The formation of some 9-thia-1,2- and 9-thia-3,4-benzofluorene derivatives was written by Davies, W.;James, F. C.;Middleton, S.;Porter, Q. N.. And the article was included in Journal of the Chemical Society in 1955.COA of Formula: C8H4Br2S This article mentions the following:

The self-condensation of thianaphthene dioxide derivatives was studied. New syntheses have been developed for related polycyclic sulfones and sulfoxides. 10,11-Dihydro-9-thia-3,4-benzofluorene 9,9-dioxide (I) was heated 20 min. to yield an oil which was chromatographed on alumina with C₆H₆ and recrystallized to give blue fluorescent 9-thia-1,2-benzofluorene 9,9-dioxide (II), m. 195.5-6° (from C₆H₆). Fusion of II with KOH at 400° for 5 min. gives only a phenolic oil. Desulfurization of II occurs on refluxing 8 h. with Raney Ni in EtOH to give 2-phenylnaphthalene, m. 102-3°. II with LiAlH₄ yields 10,11-dihydro-9-thia-1,2-benzofluorene 9,9-dioxide (III), m. 157-8° (from EtOH). III with Br yields 3,4-dibromo-10,11-dihydro-9-thia-1,2-benzofluorene 9,9-dioxide (IV), m. 226-6.5°. Refluxing IV in pyridine gives II. On heating I with PCl₅, 2-chloro-9-thia-3,4-benzofluorene 9,9-dioxide (V), m. 294-5° (from MeOCH₂CH₂OH) is formed along with 1,2-dichloro-1,2,10,11-tetrahydro-9-thia-3,4-benzofluorene 9,9-dioxide (VI), m. 173.5-4°. Heating VI yields 9-thia-3,4-benzofluorene 9,9-dioxide (VII), m. 234°. Heating 3-chlorothianaphthene 1,1-dioxide gives 2,11-dichloro-10,11-dihydro-9-thia-3,4-benzofluorene 9,9-dioxide (VIII), m. 270-1° (from C₆H₆). Refluxing VIII with pyridine gives V. I with Br gives 2-bromo-9-thia-3,4-benzofluorene 9,9-dioxide (IX), m. 309-10°, and 1,2-dibromo-1,2,10,11-tetrahydro-9-thia-3,4-benzofluorene 9,9-dioxide (X), m. 185.5-6°. Refluxing X with pyridine gives VII. 3-Bromothianaphthene 1,1-dioxide is heated at 300° for 0.5 h. to give IX. 5-Bromothianaphthene in HOAc with H₂O₂ yields 5-bromothianaphthene 1,1-dioxide (XI), m. 144-4.5°. XI is refluxed for 3 h. with o-C₆H₄Cl₂ to give 2′,6-dibromo-10,11-dihydro-9-thia-3,4-benzofluorene 9,9-dioxide (XII), m. 228-9° (from EtOH). XII with Br yields 1,2,2′,6-tetrabromo-1,2,10,11-tetrahydro-9-thia-3,4-benzofluorene 9,9-dioxide (XIII), m. 239.5-40° (from C₆H₆). XIII on refluxing with pyridine gives 2′,6-dibromo-9-thia-3,4-benzofluorene 9,9-dioxide (XIV), m. 354-5° (from C₆H₆). XIV is reduced with LiAlH₄ to 9-thia-3,4-benzofluorene (XV). α-Naphthyl o-nitrophenyl sulfide, m. 152-3°, with H₂O₂ in HOAc yields α-naphthyl o-nitrophenyl sulfone (XVI), m. 128-9° (from EtOH). The isomeric β-naphthyl sulfone (XVII), m. 143.5-4°, is similarly prepared XVI in EtOH with Zn and HCl is reduced to o-aminophenyl α-naphthyl sulfone (XVIII), m. 177-8° (from EtOH). Similarly, XVII is reduced to o-aminophenyl β-naphthyl sulfone (XIX), m. 136-6.5°. Diazotization of XVIII and treatment with Cu gives II. Similar treatment of XIX followed by reduction with LiAlH₄ yields VII. o-Aminophenyl Ph sulfone with excess NaNO₂-HCl gives o-chlorophenyl Ph sulfone, m. 105-5.5°. Cyclization of o-PhC₆H₄SO₂Cl (XX) with AlCl₃ yields dibenzothiophene 5,5-dioxide, m. 229-30°. K o-α-naphthylbenzenesulfonate with PCl₅ gives o-α-naphthylbenzenesulfonyl chloride (XXI), m. 136-6.5° (from C₆H₆). XXI with AlCl₃ cyclized to VII. XX is treated with aqueous Na₂S to give o-PhC₆H₄SO₂H (XXII), m. 70-126°. XXII with SOCl₂ yields an oily sulfinyl chloride which is cyclized by AlCl₃ to dibenzothiophene 5-oxide, m. 189.5-90°. o-α-Naphthylbenzenesulfinyl chloride with AlCl₃ gives 9-thia-3,4-benzofluorene 9-oxide (XXIII), m. 147-8° (from C₆H₆-petr. ether). XXIII with SnCl₂ yields XV. XXIII is oxidized by H₂O₂ in HOAc to VII. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7COA of Formula: C8H4Br2S).

2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7) belongs to benzothiophene derivatives. Benzothiophene finds use in research as a starting material for the synthesis of larger, usually bioactive structures. It is found within the chemical structures of pharmaceutical drugs such as raloxifene, zileuton, and sertaconazole, and also BTCP.COA of Formula: C8H4Br2S

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Design of reversible multi-electron redox systems using benzochalcogenophenes containing aryl and/or ferrocenyl fragments was written by Ogawa, Satoshi;Muraoka, Hiroki;Kikuta, Kenji;Saito, Fumihito;Sato, Ryu. And the article was included in Journal of Organometallic Chemistry in 2007.Synthetic Route of C8H4Br2S This article mentions the following:

2,3-Disubstituted benzo[b]thiophenes, 1,3-disubstituted benzo[c]thiophenes, and 1,3-disubstituted benzo[c]selenophene were systematically and selectively synthesized from benzo[b]thiophene or phthaloyl dichloride as a starting material, resp. Characterization of the mols. was performed by phys. and spectroscopic means and x-ray crystallog. analyses. The cyclic voltammograms of the chalcogenophene derivatives containing aryl fragments showed well-defined reversible both anodic and cathodic steps derived from the unusually stable 5π chalcogenophene radical cations and 7π chalcogenophene radical anions. The cyclic voltammograms of the novel chalcogenophene derivatives containing ferrocenyl fragments showed a well-defined reversible cathodic step derived from the unusually stable 7π chalcogenophene radical anions and 2 distinct reversible anodic steps derived from ferrocenium cations separated from each other by a thiophene-heterocycle. The radical character of several novel 7π chalcogenophene radical anions was measured by ESR spectroscopy. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Synthetic Route of C8H4Br2S).

2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7) belongs to benzothiophene derivatives. Benzothiophene is relatively a stable molecule. The core structure is a part of various pharmaceutical substances and natural products. It is also used in the manufacturing of dyes such as thioindigo.Synthetic Route of C8H4Br2S

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Ladder-Type P,S-Bridged trans-Stilbenes was written by Weymiens, Wannes;Zaal, Mark;Slootweg, J. Chris;Ehlers, Andreas W.;Lammertsma, Koop. And the article was included in Inorganic Chemistry in 2011.Electric Literature of C8H4Br2S This article mentions the following:

Phosphole-containing π-systems have emerged as building blocks with enormous potential as electronic materials because of the tunability of the phosphorus center. Among these, asym. P-bridged trans-stilbenes are still rare, and here an elegant and efficient synthesis toward such fluorescent mol. frameworks is described. Fine-tuning of the photophys. properties is attempted by enforcing the planarization of the phosphorus tripod and thus increasing the interaction between the phosphorus lone pair and the π-system. The electronic structure of the π-conjugated frameworks is analyzed with NMR, UV-vis and fluorescence spectroscopy, and time-dependent d. functional theory (TD-DFT) calculations In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Electric Literature of C8H4Br2S).

2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7) belongs to benzothiophene derivatives. Benzothiophenes are valuable heterocycles that are widely used in medicines, agrochemicals, and materials science. It is found within the chemical structures of pharmaceutical drugs such as raloxifene, zileuton, and sertaconazole, and also BTCP.Electric Literature of C8H4Br2S

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Sensitive Assays by Nucleophile-Induced Rearrangement of Photoactivated Diarylethenes was written by Fredrich, Sebastian;Bonasera, Aurelio;Valderrey, Virginia;Hecht, Stefan. And the article was included in Journal of the American Chemical Society in 2018.Synthetic Route of C8H4Br2S This article mentions the following:

Upon light-induced isomerization, diarylethenes (DAEs) equipped with reactive aldehyde moieties rearrange selectively in the presence of amines, accompanied by decoloration. In a comprehensive study, the probe structure was optimized with regard to its inherent reactivity in the nucleophile-triggered rearrangement reaction. Detailed structure-reactivity relationships could be derived, in particular with regard to the type of integrated (het)aryl moieties as well as the location of the formyl residue, and the probes’ intrinsic reactivity with primary and secondary amines was optimized. Utilizing an ancillary base, the initially formed rearrangement product can engage in a subsequent catalytic cycle, leading to an amplified decoloration process. This addnl. catalytic pathway allows us to enhance the sensitivity of our method and successfully discriminate between amines and thiols. Moreover, probes that exhibit strong analyte-induced fluorescence modulation have been designed to further decrease the detection limit by using a more sensitive read-out. The optimized DAE probes are promising mol. components for future programmable sensing materials and devices. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Synthetic Route of C8H4Br2S).

2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7) belongs to benzothiophene derivatives. Benzothiophene scaffolds are of great importance due to its increased presence in bioactive molecules. The different substitution patterns in these heterocycles offer new opportunities for drug discovery and other applications in materials science.Synthetic Route of C8H4Br2S

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Nonsymmetrical 3,4-Dithienylmaleimides by Cross-Coupling Reactions with Indium Organometallics: Synthesis and Photochemical Studies was written by Mosquera, Angeles;Fernandez, M. Isabel;Canle Lopez, Moises;Perez Sestelo, Jose;Sarandeses, Luis A.. And the article was included in Chemistry – A European Journal in 2014.Computed Properties of C9H7BrS This article mentions the following:

The synthesis and photochem. study of novel nonsym. 1,2-dithienylethenes (DTEs) with a maleimide bridge have been carried out. The synthetic approach to the DTEs was based on successive selective palladium-catalyzed cross-coupling reactions of 5-substituted-2-methyl-3-thiophenyl indium reagents with 3,4-dichloromaleimides. The required organoindium reagents were prepared from 2-methyl-3,5-dibromothiophene by a selective (C-5) coupling reaction with triorganoindium compounds (R₃In) and subsequent metal-halogen exchange. The coupling reactions usually gave good yields and have a high atom economy with substoichiometric amounts of R₃In. The results of photochem. studies show that these novel dithienylmaleimides undergo a photocyclization reaction upon irradiation in the UV region and a photocycloreversion after excitation in the visible region, thus they can be used as photochem. switches. ON-OFF operations can be repeated in successive cycles without appreciable loss of effectiveness in the process. In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9Computed Properties of C9H7BrS).

3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9) belongs to benzothiophene derivatives. Benzothiophene is used as starting material for the synthesis of bioactive molecules. The core structure is a part of various pharmaceutical substances and natural products. Its aromaticity makes it relatively stable, although as a heterocycle, it has reactive sites which allow for functionalization.Computed Properties of C9H7BrS

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Synthesis, photochromism and holographic optical recording of a photochromic diarylethene with a chlorine atom was written by Wang, Liqin;Pu, Shouzhi;Liu, Weijun. And the article was included in Advanced Materials Research (Durnten-Zurich, Switzerland) in 2011.Name: 3-Bromo-2-methylbenzo[b]thiophene This article mentions the following:

A new unsym. photochromic diarylethene 1-(2-methyl-benzothiophenyl)-2-(2-methyl-5-(2-chlorophenyl))perfluoroncyclopentene (1a), was synthesized and its optoelectronic properties, such as photochromism in solution as well as in PMMA amorphous films, fluorescences and the fluorescence spectra of diarylethene 1a depended on the concentration were investigated. Using diarylethene 1/PMMA film as recording medium and a linearly polarized 633 nm laser diode for recording and readout, polarization multiplexed image recording can be carried out in this film, which illustrated that the diarylethene can be potentially used as holog. optical recording medium. In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9Name: 3-Bromo-2-methylbenzo[b]thiophene).

3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9) belongs to benzothiophene derivatives. Benzothiophene is relatively a stable molecule. The core structure is a part of various pharmaceutical substances and natural products. It is found within the chemical structures of pharmaceutical drugs such as raloxifene, zileuton, and sertaconazole, and also BTCP.Name: 3-Bromo-2-methylbenzo[b]thiophene

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Synthesis and reactions of 2,3,5,6-tetrahydro-2,5-ethano-3-benzazocin-4(1H)-one and a thieno-extended analog: x-ray structure of 3-methyl-2,3,5,6-tetrahydro-2,5-ethano[1]benzothieno[3,2-d]azocin-4(1H)-one was written by Iddon, Brian;Redhouse, Alan D.;Yat, Patrick N.. And the article was included in Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) in 1990.Recommanded Product: 10243-15-9 This article mentions the following:

Hexahydromethanobenzocyclooctenone I (X = O) was prepared by condensation of o-xylene-α,α’-diyl dibromide with N-cyclopentylidenepyrrolidine and converted by Beckmann rearrangement of I (X = NOH) into tetrahydroethanobenzazocinone II (R = H). 2,3-Bis(bromomethyl)benzo[b]thiophene was converted similarly into a mixture of tetrahydroethanobenzothienoazocinones III (X¹ = NH, X² = CO; X¹ = CO, X² = NH). II (R = H) was N-methylated and II (R = H, Me) were reduced with LiAlH₄ to the saturated products. Conversion of II (R = H) into the corresponding thiolactam with P₂S₅ followed by alkylation gave an N– or S-alkylated derivative, (e.g., IV, R = Me, Et), depending on the reagent and reaction conditions. The structures of a number of compounds in this work are based on the x-ray anal. of III (X¹ = CO, X² = NMe). In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9Recommanded Product: 10243-15-9).

3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9) belongs to benzothiophene derivatives. Functionalized benzothiophenes are important constructs found in molecules with wide ranging biological activity and in organic materials. It is found within the chemical structures of pharmaceutical drugs such as raloxifene, zileuton, and sertaconazole, and also BTCP.Recommanded Product: 10243-15-9

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Reversible Photomodulation of Electronic Communication in a π-Conjugated Photoswitch-Fluorophore Molecular Dyad was written by Moreno, Javier;Schweighoefer, Felix;Wachtveitl, Josef;Hecht, Stefan. And the article was included in Chemistry – A European Journal in 2016.Quality Control of 3-Bromo-2-methylbenzo[b]thiophene This article mentions the following:

The extent of electronic coupling between a boron dipyrromethene (BODIPY) fluorophore and a diarylethene (DAE) photoswitch has been modulated in a covalently linked mol. dyad by irradiation with either UV or visible light. In the open isomer, both moieties can be regarded as individual chromophores, while in the closed form the lowest electronic (S₀→S₁) transition of the dyad is slightly shifted, enabling photomodulation of its fluorescence. Transient spectroscopy confirms that the dyad behaves dramatically different in the two switching states: while in the open isomer it resembles an undisturbed BODIPY fluorophore, in the closed isomer no fluorescence occurs and instead a red-shifted DAE behavior prevails. In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9Quality Control of 3-Bromo-2-methylbenzo[b]thiophene).

3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9) belongs to benzothiophene derivatives. Benzothiophene is relatively a stable molecule. The core structure is a part of various pharmaceutical substances and natural products. It has been used as a raw material for the synthesis of biologically active structures and is found in pharmaceuticals such as leukotriene synthesis inhibitors and antifungals, as well as in many natural products.Quality Control of 3-Bromo-2-methylbenzo[b]thiophene

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem