Month: January 2023

Photochromic dihetarylethenes. 12. Synthesis of 5-alkyl-2-(1,3,4-oxadiazol-2-yl)thiophenes and their photochromic derivatives was written by Krayushkin, M. M.;Stoyanovich, F. M.;Zolotarskaya, O. Yu.;Chernoburova, E. I.;Makhova, N. N.;Yarovenko, V. N.;Zavarzin, I. V.;Martynkin, A. Yu.;Uzhinov, B. M.. And the article was included in Chemistry of Heterocyclic Compounds (New York, NY, United States)(Translation of Khimiya Geterotsiklicheskikh Soedinenii) in 2002.Electric Literature of C9H7BrS This article mentions the following:

Photochromic 5-alkyl-2-(1,3,4-oxadiazol-2-yl)thiophenes I (R¹ = Me, R² = Ph, 4-MeOC₆H₄; R¹ = n-hexyl, R² = 6-methoxy-2-benzothiazolyl) and II were synthesized, and their photochromic and fluorescent properties were studied. In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9Electric Literature of C9H7BrS).

3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9) belongs to benzothiophene derivatives. Benzothiophene finds use in research as a starting material for the synthesis of larger, usually bioactive structures. Due to its aromaticity, thiophenes do not exhibit the same properties as conventional thioethers.Electric Literature of C9H7BrS

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Characteristic Structures and Photophysical Properties of Nine-Coordinate Europium(III) Complexes with Tandem-Connected Tridentate Phosphane Oxide Ligands was written by Miyata, Kohei;Hasegawa, Yasuchika;Kuramochi, Yusuke;Nakagawa, Tetsuya;Yokoo, Toshiaki;Kawai, Tsuyoshi. And the article was included in European Journal of Inorganic Chemistry in 2009.Name: 2,3-Dibromobenzo[b]thiophene This article mentions the following:

Structures and photophys. properties of three f-block metal complexes with tandem-connected tridentate phosphine oxide ligands, {bis[o-(diphenylphosphoryl)phenyl]phenylphosphine oxide}tris(hexafluoroacetylacetonato)europium(III) [Eu(hfa)₃(DPPPO)], {bis[o-(diphenylphosphoryl)pyridyl]phenylphosphine oxide}tris(hexafluoroacetylacetonato)europium(III) [Eu(hfa)₃(DPPYPO)] and {bis[o-(diphenylphosphoryl)benzothienyl]phenylphosphine oxide}tris(hexafluoroacetylacetonato)europium(III) [Eu(hfa)₃(DPBTPO)], are reported. The coordination geometries of Eu(hfa)₃(DPPPO) and Eu(hfa)₃(DPBTPO) provide characteristic distorted, capped square antiprism structures with nine-coordinate oxygen atoms. The emission properties related to the electronic transition were characterized by the emission spectra, the emission quantum yields, the emission lifetimes, and the radiative and non-radiative rate constants Eu^III complexes with tridentate phosphine oxide ligands offer relatively high emission quantum yields (> 60% in [D₆]acetone) due to their low-sym. and low-frequency vibrational structures. The elec. dipole transition intensities in the emission spectra depend on the chem. structures of tridentate phosphine oxides. The characteristic photophys. properties of polyhedral f-block metal complexes, nine-coordinate Eu^III complexes with tridentate phosphine oxide, are demonstrated for the first time. (© Wiley-VCH Verlag GmbH and Co. KGaA, 69451 Weinheim, Germany, 2009). In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Name: 2,3-Dibromobenzo[b]thiophene).

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. Its aromaticity makes it relatively stable, although as a heterocycle, it has reactive sites which allow for functionalization.Name: 2,3-Dibromobenzo[b]thiophene

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Reversible light-driven magnetic switching of salen cobalt complex was written by Wan, Song;Li, Mengqi;Zhang, Zhipeng;Xi, Hancheng;Yang, Hong;Luo, Qianfu;Zhu, Wei-Hong. And the article was included in Science China: Chemistry in 2020.Application of 10243-15-9 This article mentions the following:

Spin-crossover (SCO) metal complexes are expected to be widely used in data storage materials, display devices and sensors. Although a lot of spin-crossover photoswitches have been developed, the reversible photomodulation cases that work at room temperature are limited. Herein, a novel cobalt complex o-1-Co(II) wherein the salen unit bridges with bis-diarylethene has been designed as switch to construct “off-on” logic operation at room temperature The complex o-1-Co(II) displays an abrupt, reversible and hysteretic spin crossover (T1/2↓=166 K, T1/2←=177 K, and ΔT1/2=11 K) between the high-spin (HS) and low-spin (LS) states. Meanwhile, photocyclization of o-1-Co(II) with UV light produces a photoresponsive closed form c-1-Co(II), which always stays at low-spin without SCO at all. Moreover, the magnetic switching of the complex can also be achieved with redox reactions between Co(II) and Co(III). In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9Application of 10243-15-9).

3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9) belongs to benzothiophene derivatives. Benzothiophene finds use in research as a starting material for the synthesis of larger, usually bioactive structures. Its aromaticity makes it relatively stable, although as a heterocycle, it has reactive sites which allow for functionalization.Application of 10243-15-9

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Photochromic kinetics of diarylethene bearing azido moiety in solution and in PMMA amorphous film was written by Ma, Lele;Xia, Shuijun;Liu, Gang. And the article was included in Applied Mechanics and Materials in 2014.Safety of 3-Bromo-2-methylbenzo[b]thiophene This article mentions the following:

A new photoinduced fluorescent switch based on a photochromic diarylethene, 1-(2-methyl-3-benzothiophenyl)-2-[2-methyl-5-(4-azidomethylphenyl)-3-thienyl]perfluorocyclopentene was synthesized and its photochromism was investigated. The results showed that this compound exhibited reversible photochromism, changing from colorless to purple upon irradiation with UV light both in solution and in PMMA amorphous film. In acetonitrile, the open-ring isomer of the diarylethene 1o exhibited relatively strong fluorescence at 473 nm when excited at 320 nm. The results demonstrated that the diarylethene can be also functioned as a fluorescence switch. In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9Safety of 3-Bromo-2-methylbenzo[b]thiophene).

3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9) 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 zileuton, raloxifene, and sertaconazole, and also BTCP.Safety of 3-Bromo-2-methylbenzo[b]thiophene

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Substitution reactions of benzo[b]thiophen derivatives. I. Bromination and nitration of 2,3-dibromobenzo[b]thiophen and its 5-methyl derivative was written by Cooper, J.;Ewing, D. F.;Scrowston, R. M.;Westwood, R.. And the article was included in Journal of the Chemical Society [Section] C: Organic in 1970.Reference of 6287-82-7 This article mentions the following:

Bromination of 2,3-dibromobenzo[b]thiophene in CHCl3 or AcOH gives the 2,3,6-tribromo derivative; nitration gives a mixture of 2,3,6-tribromo- (25%), 2,3,4-tribromo- (3%), 2,3-dibromo-6-nitro- (32%), and 2,3-dibromo-4-nitrobenzo[b]thiophene (36%). Analogous results are obtained for the bromination and nitration of 2,3-dibromo-5-methylbenzo[b]thiophene, except that the presence of the 5-methyl group increases the proportion of the 4-substituted product in each case. The structures assigned are supported by a detailed anal. of their 1H NMR spectra. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Reference of 6287-82-7).

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.Reference of 6287-82-7

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Reductive dehalogenation with sodium hydrazide and hydrazine was written by Kauffmann, Th.;Henkler, H.;Zengel, H.. And the article was included in Angewandte Chemie in 1962.Product Details of 6287-82-7 This article mentions the following:

Aromatic halides react rapidly in benzene or Et₂O solution with excess NaNHNH₂ and H₂NNH₂ (halide, reaction temperature, product, and % yield given): mesityl bromide, 25°, mesitylene, 82; o-(m-, p-)bromoanisole, 20°, anisole, 58 (30, 38); 1(2)-bromonaphthalene, 0°, naphthalene, 75 (52); 1(2)-chloronaphthalene, 0°, naphthalene, 65 (75); 1(2)-fluoronaphthalene, 25° (0°), naphthalene, 39 (60); 9-bromoanthracene, 0°, anthracene, 90; 2,3-dibromocumarone, 0°, cumarone, 85; 2,3-dibromothionaphthene, 45°, thionaphthene, 74; 4-bromoisoquinoline, 0°, isoquinoline, 57; 1-chloroferrocene, 30°, ferrocene, 97. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Product Details of 6287-82-7).

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.Product Details of 6287-82-7

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Palladium-Catalyzed Direct Decarbonylative Cyanation of Aryl Carboxylic Acids was written by Zhang, Guofu;Miao, Huihui;Guan, Chenfei;Ding, Chengrong. And the article was included in Journal of Organic Chemistry in 2022.COA of Formula: C9H5NS This article mentions the following:

The direct transformation of aryl carboxylic acids to aryl nitrile compounds is an interesting topic because carboxylic acids are not only abundant in nature but are also inexpensive and stable. Here, the synthesis of a series of aryl nitriles by palladium-catalyzed decarbonylative cyanation of carboxylic acids without base has been achieved. The successful decarbonylative cyanation of drug mols. and gram-scale reaction to verify the practicality and operability of this method are analyzed. In the experiment, the researchers used many compounds, for example, Benzo[b]thiophene-2-carbonitrile (cas: 55219-11-9COA of Formula: C9H5NS).

Benzo[b]thiophene-2-carbonitrile (cas: 55219-11-9) belongs to benzothiophene derivatives. Benzothiophene finds use in research as a starting material for the synthesis of larger, usually bioactive structures. The different substitution patterns in these heterocycles offer new opportunities for drug discovery and other applications in materials science.COA of Formula: C9H5NS

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Iridium-Catalyzed Hydrogen Transfer: Synthesis of Substituted Benzofurans, Benzothiophenes, and Indoles from Benzyl Alcohols was written by Anxionnat, Bruno;Gomez Pardo, Domingo;Ricci, Gino;Rossen, Kai;Cossy, Janine. And the article was included in Organic Letters in 2013.Category: benzothiophene This article mentions the following:

An iridium-catalyzed hydrogen transfer has been developed in the presence of p-benzoquinone, allowing the synthesis of a diversity of substituted benzofurans, benzothiophenes, and indoles from substituted benzylic alcs. E.g., in presence of [IrCp^*Cl₂]₂, p-benzoquinone, and Cs₂CO₃, hydrogen transfer/cyclization of benzylic alc. (I) gave 98% benzofuran derivative (II). In the experiment, the researchers used many compounds, for example, Benzo[b]thiophene-2-carbonitrile (cas: 55219-11-9Category: benzothiophene).

Benzo[b]thiophene-2-carbonitrile (cas: 55219-11-9) belongs to benzothiophene derivatives. Benzothiophene scaffolds are of great importance due to its increased presence in bioactive molecules. It is found within the chemical structures of pharmaceutical drugs such as raloxifene, zileuton, and sertaconazole, and also BTCP.Category: benzothiophene

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Dually Switchable Heterotetracenes: Addressing the Photophysical Properties and Self-Organization of the P-S System was written by Ren, Yi;Baumgartner, Thomas. And the article was included in Journal of the American Chemical Society in 2011.Related Products of 6287-82-7 This article mentions the following:

New ladder-type, phosphorus- and sulfur-based heterotetracenes were synthesized, which allowed the engineering of the materials’ properties by exploitation of the different reactivities between sulfur and phosphorus. ³¹P NMR spectroscopy and x-ray crystallog. studies revealed that the different electronic effects of the secondary heteroatom, sulfur, influence not only the conjugation in the heterotetracene core but also the behavior of the phosphorus center. UV-vis and fluorescence spectroscopy showed that the scaffold’s band gap is mainly controlled by the electronic nature of sulfur, while the fluorescence quantum yield highly depends on the electronic nature of phosphorus. Cyclic voltammetry indicated that the redox properties of the system could be altered by selective modification of the resp. heteroatom (oxidation of sulfur and/or functionalization of trivalent phosphorus). Importantly, oxidation of the phosphorus center results in enhanced reduction features of the heterotetracene system, and oxidation of the sulfur center further enhances the electron acceptor character of the core. Theor. calculations provided insights on both selectivity of phosphorus chem. and communication between the two heteroatoms (sulfur and phosphorus). Macroscopic self-organization of the heterotetracenes was observed when the tetracene core is functionalized with pendant functional groups. Preliminary results showed that extension of the mol. with an alkyl chain along the long axis of mols. induces the formation of 1D microfibers, which was confirmed by fluorescence microscopy and SEM. 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. Benzothiophenes are valuable heterocycles that are widely used in medicines, agrochemicals, and materials science. Its aromaticity makes it relatively stable, although as a heterocycle, it has reactive sites which allow for functionalization.Related Products of 6287-82-7

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem