Month: January 2023

Photochromism and fluorescence of a novel unsymmetrical diarylethene material bearing benzene and thiophene ring was written by Jing, Shuhong;Pu, Shouzhi;Li, Hui. And the article was included in Applied Mechanics and Materials in 2012.SDS of cas: 10243-15-9 This article mentions the following:

A new photochromic diarylethene compound, 1-[2-methyl-(5-(4- dioxolane) phenyl)-3-thienyl]-2-(2-methyl-3-benzothiophene)perfluorocyclopentene (1o) was synthesized. Its properties, including photochromism and fluorescence were investigated in detail both in solution and PMMA amorphous film. It underwent reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light in hexane. The compound showed good photochromism both in solution and in solid states. Diarylethene 1o changed the color from colorless to purple upon irradiation with 297 nm UV light, in which absorption maxima were observed at 539 nm in hexane and at 547 nm in PMMA film, resp. Using diarylethene 1c/PMMA film as recording medium, optical recording was performed successfully. This new photochromic system also exhibited remarkable optical storage character. In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9SDS of cas: 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. 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.SDS of cas: 10243-15-9

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Palladium-catalyzed tandem N-H/C-H arylation: regioselective synthesis of N-heterocycle-fused phenanthridines as versatile blue-emitting luminophores was written by Yan, Lipeng;Zhao, Dongbing;Lan, Jingbo;Cheng, Yangyang;Guo, Qiang;Li, Xiaoyu;Wu, Ningjie;You, Jingsong. And the article was included in Organic & Biomolecular Chemistry in 2013.Category: benzothiophene This article mentions the following:

A general and highly regioselective synthetic protocol for structurally diverse N-heteroaryl-fused phenanthridines has been developed. Varieties of fluorescence mols. comprising imidazole-fused, benzoimidazole-fused, indole-fused and pyrrole-fused phenanthridines were obtained by this modular approach, some of which exhibit excellent blue-emitting performance, high quantum yields, long fluorescence lifetimes, interesting electrochem. properties, and thermal stabilities. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Category: benzothiophene).

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. Due to its aromaticity, thiophenes do not exhibit the same properties as conventional thioethers.Category: benzothiophene

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Photoredox Catalysis Enables Access to N-Functionalized 2,1-Borazaronaphthalenes was written by Wang, Xie;Davies, Geraint H. M.;Koschitzky, Adriel;Wisniewski, Steven R.;Kelly, Christopher B.;Molander, Gary A.. And the article was included in Organic Letters in 2019.Application In Synthesis of Methyl 5-bromobenzo[b]thiophene-2-carboxylate This article mentions the following:

The synthesis and use of a class of 2,1-borazaronaphthyltrifluoroborate reagents that provide a general solution to the challenge of N-functionalization of the 2,1-borazaronaphthalene core is described. By adorning the N of this core with a trifluoroboratomethyl unit, a suite of odd-electron processes can be executed, installing motifs that would otherwise be inaccessible using a two-electron approach. This process enables rapid annulation, furnishing a heretofore unknown polycyclic B-N species. In the experiment, the researchers used many compounds, for example, Methyl 5-bromobenzo[b]thiophene-2-carboxylate (cas: 7312-11-0Application In Synthesis of Methyl 5-bromobenzo[b]thiophene-2-carboxylate).

Methyl 5-bromobenzo[b]thiophene-2-carboxylate (cas: 7312-11-0) belongs to benzothiophene derivatives. Benzothiophene is a fused ring compound of thiophene ring and benzene ring, which is an important class of heterocycles with advantageous structures. 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.Application In Synthesis of Methyl 5-bromobenzo[b]thiophene-2-carboxylate

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Copper-mediated cyanation of aryl boronic acids using benzyl cyanide was written by Luo, Yan;Wen, Qiaodong;Wu, Zhiyuan;Jin, Jisong;Lu, Ping;Wang, Yanguang. And the article was included in Tetrahedron in 2013.Computed Properties of C9H5NS This article mentions the following:

An efficient copper-mediated synthesis of aryl nitriles from arylboronic acids was achieved using benzyl cyanide as a user-friendly cyanide source. Various arylboronic acids underwent the reaction smoothly, affording the corresponding aryl nitriles in moderate to good yields. Tert-Bu hydroperoxide (TBHP) was found to be a critical agent facilitating the cyanation. In the experiment, the researchers used many compounds, for example, Benzo[b]thiophene-2-carbonitrile (cas: 55219-11-9Computed Properties of 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. Its aromaticity makes it relatively stable, although as a heterocycle, it has reactive sites which allow for functionalization.Computed Properties of C9H5NS

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Transformation of aromatic bromides into aromatic nitriles with n-BuLi, pivalonitrile and iodine under metal cyanide-free conditions was written by Uchida, Ko;Togo, Hideo. And the article was included in Tetrahedron in 2019.HPLC of Formula: 55219-11-9 This article mentions the following:

Various aromatic nitriles ArCN [Ar = Ph, 4-BrC₆H₄, 5-ethyl-2-furyl, etc.] were obtained in good yields by the treatment of aryl bromides with n-butyllithium and then pivalonitrile, followed by the treatment with mol. iodine at 70 °C, without metal cyanides under transition-metal-free conditions. The present reaction proceeded through the radical β-elimination of imino-nitrogen-centered radicals formed from the reactions of imines and N-iodoimines under warming conditions. In the experiment, the researchers used many compounds, for example, Benzo[b]thiophene-2-carbonitrile (cas: 55219-11-9HPLC of Formula: 55219-11-9).

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 zileuton, raloxifene, and sertaconazole, and also BTCP.HPLC of Formula: 55219-11-9

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Self-Contained Photoacid Generator Triggered by Photocyclization of Triangle Terarylene Backbone was written by Nakashima, Takuya;Tsuchie, Kenta;Kanazawa, Rui;Li, Ruiji;Iijima, Shunsuke;Galangau, Olivier;Nakagawa, Hisako;Mutoh, Katsuya;Kobayashi, Yoichi;Abe, Jiro;Kawai, Tsuyoshi. And the article was included in Journal of the American Chemical Society in 2015.HPLC of Formula: 6287-82-7 This article mentions the following:

We herein propose a new type of efficient neutral photoacid generator. A photoinduced 6π-electrocyclization reaction of photochromic triangle terarylenes triggers subsequent release of a Bronsted acid, which took place from the photocyclized form. A H-atom and its conjugate base were introduced at both sides of a 6π-system to form the self-contained photoacid generator. UV irradiation to the 6π-system produces a cyclohexa-1,3-diene part with a H-atom and a conjugate base on the sp³ C-atoms at 5- and 6-positions, resp., which spontaneously release an acid mol. quant. forming a polyaromatic compound A net quantum yield of photoacid generation as high as 0.52 under ambient conditions and a photoinitiated cationic polymerization of an epoxy monomer are demonstrated. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7HPLC of Formula: 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.HPLC of Formula: 6287-82-7

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Reversible Photochemical Switching via Plasmonically Enhanced Upconversion Photoluminescence was written by Kim, Byunghoon;Lee, Kyu-Tae;Cho, Junhee;Darshanoju, Narasimha Achary;Jung, Kinam;Ahn, In-Hwan;Shin, Jae-Min;Oh, Hyeongyeol;Ki, Yeongcheol;Lee, Hohjai;Kwon, Seok Joon;Kim, In Soo;Cai, Wenshan;Ahn, Kwang-Hyun;Ko, Doo-Hyun. And the article was included in Advanced Optical Materials in 2021.Related Products of 10243-15-9 This article mentions the following:

Photochromic mol.-incorporated optical devices offer desirable properties for photocontrollable optical systems, including advanced optical data storage and super-resolution imaging. However, these mols. require multiple illumination sources, such as UV and visible light, for reversible photochem. reactions, which restricts their potential for advanced application. This study reports an effective strategy for modulating photoisomerization via a single near-IR light source assisted by plasmonically enhanced photoswitchable upconversion photoluminescence (UCPL). The proposed quasi-periodic metal nanostructures to facilitate the resonance modes in the broadband region enable the substitution of the detrimental high-energy light source (i.e., UV light) with near-IR stimuli, which is associated with UCPL enhancement of over two orders with spectrum orthogonality. To validate this concept, the accelerated reversible-photoisomerization kinetics is exptl. confirmed by three- and tenfold amplification of the PL intensities of the photochromic disulfonyldiarylethene derivatives Further validation of the proposed strategy is performed using photodynamic imaging, which reveals accelerated photoisomerization, high photocyclization stability, and high spatial resolution In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9Related Products of 10243-15-9).

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.Related Products of 10243-15-9

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

A BEt₃-Base Catalyst for Amide Reduction with Silane was written by Yao, Wubing;Fang, Huaquan;He, Qiaoxing;Peng, Dongjie;Liu, Guixia;Huang, Zheng. And the article was included in Journal of Organic Chemistry in 2019.Application of 55219-11-9 This article mentions the following:

Reported herein is the development of a simple but practical catalytic system for the selective reduction of amides with hydrosilane or hydrosiloxane. Low-cost and readily available triethylborane (1.0 M in THF), in combination with a catalytic amount of an alkali metal base, was found to catalyze the reduction of all three amide classes (tertiary, secondary, and primary amides) to form amines under mild conditions. In addition, the selective transformation of secondary amides to aldimines and primary amides to nitriles can also be achieved by using a proper combination of BEt₃ and base. The scope of these BEt₃-base-catalyzed amide hydrosilylation reactions has been explored in depth. Preliminary results of mechanistic studies suggest a modified Piers’ silane Si-H···B activation mode wherein the hydride abstraction by BEt₃ is promoted by the coordination of an alkoxide or hydroxide anion to the Si center. In the experiment, the researchers used many compounds, for example, Benzo[b]thiophene-2-carbonitrile (cas: 55219-11-9Application of 55219-11-9).

Benzo[b]thiophene-2-carbonitrile (cas: 55219-11-9) belongs to benzothiophene derivatives. Benzothiophenes are valuable heterocycles that are widely used in medicines, agrochemicals, and materials science. It is also used in the manufacturing of dyes such as thioindigo.Application of 55219-11-9

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Transition-Metal-Free Synthesis of 1,2-Disubstituted Indoles was written by Chesnokov, Gleb A.;Ageshina, Alexandra A.;Topchiy, Maxim A.;Nechaev, Mikhail S.;Asachenko, Andrey F.. And the article was included in European Journal of Organic Chemistry in 2019.COA of Formula: C9H7BrS This article mentions the following:

A new transition-metal-free robust and cost-effective method for synthesis of 1,2-disubstituted indoles from easily available unactivated (i.e. without EWG, PPh₃ or SiR₃ groups) tertiary amides. Scope of synthetic applicability of the presented protocol was shown on 23 examples of 1,2-disubstituted indoles with different substitution patterns obtained in good to excellent yields. The reported method turned out to be especially effective for synthesis of N-arylated 2-CF₃-indoles. Moreover, this approach can be performed in a one-pot two-step manner directly from com. available secondary amines. Mechanistic studies showed that acyl transfer might be an important step in the course of the reaction. Viability of the presented approach for benzofurans and benzothiophenes synthesis was also discussed. In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9COA of Formula: C9H7BrS).

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 zileuton, raloxifene, and sertaconazole, and also BTCP.COA of Formula: C9H7BrS

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Synthesis of a novel family of photochromic amorphous molecular materials based on dithienylethene, their photochromic properties and application for dual image formation was written by Utsumi, Hisayuki;Nagahama, Daisuke;Nakano, Hideyuki;Shirota, Yasuhiko. And the article was included in Journal of Materials Chemistry in 2002.Safety of 3-Bromo-2-methylbenzo[b]thiophene This article mentions the following:

A novel family of photochromic amorphous mol. materials containing a dithienylethene moiety, 1-{5-[4-(di-p-tolylamino)phenyl]-2-methylthiophen-3-yl}-2-(2,5-dimethylthiophen-3-yl)-3,3,4,4,5,5-hexafluorocyclopentene, 1-{5-[4-(di-p-tolylamino)phenyl]-2-methylthiophen-3-yl}-2-(2-methylbenzo[b]thiophen-3-yl)-3,3,4,4,5,5-hexafluorocyclopentene and 1,2-bis{5-[4-(di-p-tolylamino)phenyl]-2-methylthiophen-3-yl}-3,3,4,4,5,5-hexafluorocyclopentene, have been designed and synthesized. These compounds, together with their photocyclized products, were found to readily form amorphous glasses with well-defined glass transition temperatures and to undergo photochromism as amorphous films as well as in solution These compounds are characterized by high quantum yields for the photocyclization reactions, very low quantum yields for the reverse ring-opening reactions and, hence, almost 100% fractions of the photocyclized form at the photostationary state in solution These results suggest that the anti-parallel conformer is more populated than the parallel conformer. Optical dichroism was induced by irradiation of colored films of the photocyclized compounds with linearly polarized red light, and dual image formation at the same location was realized by utilizing this phenomenon. 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. Benzothiophene is a fused ring compound of thiophene ring and benzene ring, which is an important class of heterocycles with advantageous structures. It is found within the chemical structures of pharmaceutical drugs such as raloxifene, zileuton, sertaconazole, and also BTCP.Safety of 3-Bromo-2-methylbenzo[b]thiophene

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem