Day: February 1, 2023

Nucleophilic Activation of Hydrosilanes via a Strain-Imposing Strategy Leading to Functional Sila-aromatics was written by Ikeuchi, Toshiya;Hirano, Keiichi;Uchiyama, Masanobu. And the article was included in Journal of the American Chemical Society in 2021.Related Products of 6287-82-7 This article mentions the following:

Carefully designed cyclic hydrosilanes enable trans-selective hydrosilylation of unactivated alkynes without transition metal catalysts via silicate formation. Employment of sterically demanding bidentate ligands of Si increases steric congestion upon silicate formation, and this strain-imposing strategy facilitates hydride transfer. This hydrosilylation provides efficient access to diverse benzosiloles, silaphenalenes, and related silacycles. 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 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.Related Products of 6287-82-7

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

New derivatives of thianaphthene was written by Ried, Walter;Bender, Heinz. And the article was included in Chemische Berichte in 1955.COA of Formula: C8H4Br2S This article mentions the following:

2-Formylthianaphthene (I) (4.87 g.) and 5.37 g. hippuric acid heated 45 min. with 2.46 g. anhydrous NaOAc and 30 g. Ac₂O and poured into H₂O gave 95% 2-phenyl-4-(2-thianaphthenylmethylene)-2-oxazolin-5-one (II), C₁₈H₁₁NO₂S, m. 206° (from C₆H₆) which gave 74% α-amino-2-thianaphthenepropionic acid, C₁₁H₁₁NO₂S, m. 258° (decomposition) (from aqueous EtOH)[R_f 0.79 (PhOH:H₂O-4:1)], with P and HI. II and 2% alc. aqueous NaOH refluxed 20 min. gave 73% α-benzamido-2-thianaphtheneacrylic acid (III), C₁₈H₁₃NO₃S, m. 245° (decomposition) (from MeOH), reduced (Pt, MeOH) to α-benzamido-2-thianaphthenepropionic acid, C₁₈H₁₅NO₃S, m. 178.5-9° (from MeOH). III heated 1 hr. with Na₂CO₃ and wet H saturated Raney Ni gave Ph(CH₂)₃CH(NHBz)CO₂H, C₁₈H₁₉NO₃, m. 187.5° (from MeOH). I and malonic acid heated 4 hrs. with pyridine, the excess aldehyde steam distilled and the residue acidified gave 75% 2-thianaphtheneacrylic acid (IV), C₁₁H₁₈O₂S, m. 231° (from H₂O). IV reduced to the propionic acid, C₁₁H₈O₂S, m. 138.5° (from MeOH). Similarly malonic acid and 3-formylthianaphthene gave 3-thianaphtheneacrylic acid, m. 225° (from MeOH). I and Br 10 hrs. at room temperature gave 80% 3-bromo-2-formylthianaphthene, C₉H₅BrOS, m. 118-18.5° (from AcOH), which yielded 59% 3-bromo-2-thianaphthenecarboxylic acid (V) when gently heated with 20 g. KMnO₄ in 100 ml. H₂O and 300 ml. Me₂CO and allowed to stand 20 hrs.; V was also obtained in 15% yield by brominating the Na salt of 2-thianaphthenecarboxylic acid 8 days in daylight, or in 79% yield from dibromothianaphthene (VI), BuLi, and CO₂. VI was prepared in 85% yield from Br and thianaphthene (12 hrs.). I with Ac₂O and ZnCl₂ in 24 hrs. gave 2-(diacetoxymethyl)thianaphthene, C₁₃H₁₂O₄S, m. 94° (from petr. ether). 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 is relatively a stable molecule. The electrophilic substitution of benzothiophene systems is much less regioselective than that of indoles. 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.COA of Formula: C8H4Br2S

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Synthesis and photochromic properties of novel pyridine-containing diarylethenes was written by Liu, Gang;Liu, Ming;Pu, Shouzhi;Fan, Congbin;Cui, Shiqiang. And the article was included in Dyes and Pigments in 2012.Product Details of 10243-15-9 This article mentions the following:

Three isomeric pyridine-containing diarylethenes were synthesized to study the effects of nitrogen atom position (ortho, para, meta) on their photochromic properties. Among these diarylethenes, the example with the nitrogen atom at the ortho-position of pyridine displayed the largest absorption maximum and molar absorption coefficients The cyclization quantum yields increased in order of para < meta < ortho, whereas their cycloreversion quantum yields decreased in order of para > meta > ortho. Compared to the diarylethene with terminal Ph ring, those with a terminal pyridine showed enhanced cyclization quantum yields and emission intensities. Moreover, these pyridine-containing diarylethenes exhibited multi-addressable switching behavior under the stimulation of both proton and light. Addition of trifluoroacetic acid to the solutions of the diarylethenes resulted in notable color change, and their N-protonated forms also possessed excellent photochromism. These results indicated that the nitrogen atom position played a pivotal role in the process of photoisomerization of the diarylethenes. In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9Product Details of 10243-15-9).

3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9) belongs to benzothiophene derivatives. Benzothiophene is relatively a stable molecule. The electrophilic substitution of benzothiophene systems is much less regioselective than that of indoles. The different substitution patterns in these heterocycles offer new opportunities for drug discovery and other applications in materials science.Product Details of 10243-15-9

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

New scaffolds for the design of selective estrogen receptor modulators was written by Martin-Santamaria, Sonsoles;Rodriguez, Jose-Juan;de Pascual-Teresa, Sonia;Gordon, Sandra;Bengtsson, Martin;Garrido-Laguna, Ignacio;Rubio-Viqueira, Belen;Lopez-Casas, Pedro P.;Hidalgo, Manuel;de Pascual-Teresa, Beatriz;Ramos, Ana. And the article was included in Organic & Biomolecular Chemistry in 2008.Safety of 6-Methoxybenzo[b]thiophene This article mentions the following:

In the present work we report the synthesis of four new ER ligands which can be used as scaffolds for the introduction of the basic side chains necessary for antiestrogenic activity. Affinities and agonist/antagonist characterization of the ligands for both ERα and ERβ have been determined in a competitive radioligand assay, and in an in vitro coactivator recruitment functional assay, resp. Mol. modeling techniques have been used in order to rationalize the exptl. results. Compound 2 is reported as a novel ERβ-agonist/ERα-antagonist. Two compounds show an interesting antitumor profile towards two pancreatic cancer cell lines and have been selected for in vivo assays. In the experiment, the researchers used many compounds, for example, 6-Methoxybenzo[b]thiophene (cas: 90560-10-4Safety of 6-Methoxybenzo[b]thiophene).

6-Methoxybenzo[b]thiophene (cas: 90560-10-4) 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. Its aromaticity makes it relatively stable, although as a heterocycle, it has reactive sites which allow for functionalization.Safety of 6-Methoxybenzo[b]thiophene

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Synthesis of 6-thiaellipticine and related compounds via heterocyclic o-quinodimethane intermediates was written by Kano, Shinzo;Mochizuki, Naoki;Hibino, Satoshi;Shibuya, Shiroshi. And the article was included in Journal of Organic Chemistry in 1982.Recommanded Product: 10243-15-9 This article mentions the following:

Pyrolysis of tertiary alcs. I (R = 2-pyridyl, R¹ = Me,Et) at 400 °C for 7 min gave benzo[b]thieno[3,2-g]quinolines II (R² = H, Me) and benzo[b]thieno[2,3-g]isoquinolines III (R² = H, Me) through cyclization of the corresponding benzo[b]thiophene-2,3-quinodimethane intermediates. Pyrolysis of I (R = 3-pyridyl, R¹ = Me,Et) afforded benzo[b]thieno[3,2-g]isoquinolines IV (R² = H, Me). Pyrolysis of V gave 5-methyl-benzo[b]thieno[2,3-g]isoquinoline and III (R² = H, Me). The alcs. VI (R³R⁴ = CH:CHCH:CH, X = O, S; R³ = R⁴ = H, X = S; R³R⁴ CH:NCH:CH, X = S) underwent similar cyclizations. 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. 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.Recommanded Product: 10243-15-9

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Dibasic benzo[b]thiophene derivatives as a novel class of active site directed thrombin inhibitors: 4. SAR studies on the conformationally restricted C3-side chain of hydroxybenzo[B]thiophenes was written by Takeuchi, Kumiko;Kohn, Todd J.;Sall, Daniel J.;Denney, Michael L.;McCowan, Jefferson R.;Smith, Gerry F.;Gifford-Moore, Donetta S.. And the article was included in Bioorganic & Medicinal Chemistry Letters in 1999.Formula: C9H8OS This article mentions the following:

A novel series of benzo[b]thiophene diamine thrombin inhibitors with a conformationally restricted C3-side chain was investigated. The constrained C3-side chain by a cyclohexyl ring contributed to not only an additive but also a synergistic effect on the thrombin inhibitory activity. The SAR studies resulted in the discovery of a potent thrombin inhibitor (I) that was over 750-fold more potent than the initial lead compound In the experiment, the researchers used many compounds, for example, 6-Methoxybenzo[b]thiophene (cas: 90560-10-4Formula: C9H8OS).

6-Methoxybenzo[b]thiophene (cas: 90560-10-4) 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, sertaconazole, and also BTCP.Formula: C9H8OS

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Ladder-type π-conjugated 4-hetero-1,4-dihydrophosphinines: A structure-property study was written by Ren, Yi;Baumgartner, Thomas. And the article was included in Chemistry – An Asian Journal in 2010.Application In Synthesis of 2,3-Dibromobenzo[b]thiophene This article mentions the following:

π-Conjugated six-membered 1,4-dihydrophosphinines containing a heteroatom (Si, P, S) at the 4 position were synthesized and systematically studied. X-ray crystallog. analyses showed that the central six-membered heterocyclic rings are almost planar. The sum of the angles around the phosphorus atom increases by 23° from the trivalent phosphorus to the phosphonium atom in the thiaphosphinine system, which is consistent with the NMR spectroscopic studies. UV/Vis spectroscopy and theor. calculations revealed that the communication between the phosphorus center and the benzothiophene moiety is enhanced by the incorporation of a sulfur atom into the mol. scaffold. The increased conjugation endows the thiaphosphinines with interesting emission properties. Theor. calculations supported the postulation that the orbital coupling between the π system and a σ* orbital could be enhanced in the thiaphosphinine system, especially through a phosphonium center. Cyclic voltammetry studies revealed that the thiaphosphinine oxide, thiaphosphonium, and cis-diphosphinine oxide exhibit quasi-reversible reduction processes, which demonstrate that simple changes in the bridge heteroatoms help to efficiently tune the redox properties of the ladder-type 4-hetero-1,4-dihydrophosphinines. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Application In Synthesis of 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. Due to its aromaticity, thiophenes do not exhibit the same properties as conventional thioethers.Application In Synthesis of 2,3-Dibromobenzo[b]thiophene

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

5-Bromothianaphthene derivatives was written by Matsuki, Yasuo;Shoji, Fusaji. And the article was included in Nippon Kagaku Zasshi in 1965.COA of Formula: C10H7BrO2S This article mentions the following:

p-BrC₆H₄SH (10.3 g.) in 2 g. Na and 50 ml. EtOH was treated with 10 g. MeCHBrCH(OMe)₂ to give 4 g. p-BrC₆H₄SCH₂CH₂CH(OMe)₂ (I), b₇ 168-9°. Similarly, p-BrC₆H₄SCH₂Ac (II), b₁₀ 164-5°, m. 64-5°, and pBrC₆H₄SCH₂Bz (III), m. 82-3°, were prepared in 76 and 44% yields, resp. Heating 3 g. I with 20 ml. polyphosphoric acid and 17 g. P₂O₅ 2 hrs. at 180° gave 0.9 g. 2-methyl-5-bromothianaphthene, m. 91-2°. Similarly, II and III gave 3-methyl-5-bromothianaphthene, b₁₀ 151-2°, m. 40-1°, and 2-phenyl-5-bromothianaphthene (IV), m. 186-7°, in 31 and 35.2% yields, resp. Desulfurization of IV with Raney Ni gave (PhCH₂)₂. 5-Bromothianaphthene (V) (10.5 g.) in Et₂O was treated with BuLi from 0.4 g. Li, 6.7 g. BuBr, and 80 ml. Et₂O and poured onto solid CO₂ to give 8.5 g. 5-bromothianaphthene-2-carboxylic acid (VI), m. 234-5°; Me ester m. 97-8°. Treating 5 g. VI with SOCl₂ in C₆H₆ gave chloride, m. 76-8°, 4.5 g. of which was treated with Me₂Cd (from 5.2 g. MeI, 1 g. Mg, 50 ml. Et₂O, and 1.9 g. CdCl₂) to give 2.6 g. 2-acetyl-5-bromothianaphthene (VII), m. 112-13°; 2,4-dinitrophenylhydrazone m. 288-9°. Treating 0.5 g. VII with 0.5 g. H₂SO₄, 6 ml. AcOH, and 0.25 g. NaN₃ at 85° and heating 8 hrs. at 95-8° gave 0.15 g. 2-acetamido-5-bromothianaphthene, m. 238-9°, which was hydrolyzed to 2-amino-5bromothianaphthene sulfate, m. 250-5° (decomposition). V (5.7 g.) was lithiated as above and treated with 4.5 g. Br to give 2.1 g. 2,5-dibromothianaphthene, m. 66.5-7.5°. 5-Bromo-2-thianaphthenyllithium (VIII) was treated with HCONMe₂ to give 73% 2formyl-5-bromothianaphthene (IX), m. 119-20°. Heating IX, CH₂(CO₂H)₂, C₅H₅N, and piperidine gave 68% 3-(5-bromo-2thianaphthenyl)acrylic acid, m. 262-3°, which was reduced with 5% Na-Hg in EtOH-dioxane-H₂O containing Na₂CO₃ to give 61% 3-(5-bromo-2-thianaphthenyl)propionic acid, m. 122-4°. VIII from 3.2 g. V was treated with 3 g. CuCl₂ to give 0.9 g. bis(5bromo-2-thianaphthenyl), m. 192-3°. V (3 g.) was treated with BuLi from 0.24 g. Li and 2.7 g. BuBr and carbonated to give thianaphthene-2,5-dicarboxylic acid, m. >310°; di-Me ester m. 152-3°. Adding 6.4 g. AlCl₃ to 10 g. V and 3.7 g. AcCl in 50 g. PhNO₂ gave 8 g. 3-acetyl-5-bromothianaphthene (X), m. 91-2°. Oxidation of × with NaOCl gave 5-bromothianaphthene-3-carboxylic acid, m. 285-6°; Me ester m. 78-9°. Schmidt reaction of × as above gave 70% 3-acetamido-5-bromothianaphthene, m. 226-7°, which was hydrolyzed to give 3-amino-5-bromothianaphthene sulfate, m. 235-40° (decomposition). V (5.7 g.) and 3.6 g. NaOAc in 20 ml. CHCl₃ was treated with 5.6 g. Br in 10 ml. CHCl₃ to give 6.1 g. 3,5-dibromothianaphthene (XI), m. 98-9°. Treating 1.4 g. XI with 2.7 g. MeI and 1.4 g. Mg in Et₂O and treating the product with solid CO₂ gave 77.3% thianaphthene-3,5-dicarboxylic acid, m. >310°. The results of substitution were compared with electron d. from mol. orbital calculations In the experiment, the researchers used many compounds, for example, Methyl 5-bromobenzo[b]thiophene-2-carboxylate (cas: 7312-11-0COA of Formula: C10H7BrO2S).

Methyl 5-bromobenzo[b]thiophene-2-carboxylate (cas: 7312-11-0) 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. It is found within the chemical structures of pharmaceutical drugs such as zileuton, raloxifene, and sertaconazole, and also BTCP.COA of Formula: C10H7BrO2S

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Certain applications of heteroatom directed ortho-metalation in sulfur heterocycles was written by Pradhan, Tarun Kanti;Ghosh, Sukhen Chandra;De, Asish. And the article was included in ARKIVOC (Gainesville, FL, United States) in 2003.SDS of cas: 90560-10-4 This article mentions the following:

Substituted benzothiophenes are prepared via heteroatom directed ortho-metalation of di-Et arylamides to introduce a methylsulfanyl group which upon deprotonation underwent intramol. cyclization to form intermediate thioindoxyls that are reduced with sodium borohydride to the corresponding benzothiophene derivative Addnl., heteroatom directed ortho-metalation of benzothiophenes is demonstrated to prepare benzothiophene analogs and heterocyclic analogs. This data is accompanied by a review of work from the author’s laboratory regarding application of directed ortho-metalation in sulfur heterocycles. In the experiment, the researchers used many compounds, for example, 6-Methoxybenzo[b]thiophene (cas: 90560-10-4SDS of cas: 90560-10-4).

6-Methoxybenzo[b]thiophene (cas: 90560-10-4) belongs to benzothiophene derivatives. Benzothiophene is relatively a stable molecule. The electrophilic substitution of benzothiophene systems is much less regioselective than that of indoles. Its aromaticity makes it relatively stable, although as a heterocycle, it has reactive sites which allow for functionalization.SDS of cas: 90560-10-4

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Reconfigurable Cascade Circuit in a Photo- and Chemical-Switchable Fluorescent Diarylethene Derivative was written by Li, Zhan-Xian;Liao, Long-Yan;Sun, Wei;Xu, Chun-Hu;Zhang, Chao;Fang, Chen-Jie;Yan, Chun-Hua. And the article was included in Journal of Physical Chemistry C in 2008.Recommanded Product: 10243-15-9 This article mentions the following:

A new unsym. diarylethene derivative 1-{4-(5-methoxy-2-(2-pyridyl)thiazolyl)}-2-{3-(2-methylbenzo[b]thiophenyl)}hexafluorocyclopentene (1) was designed and synthesized. Fluorescence behaviors of 1 are multiswitched through protonation, coordination, and photochem. reactions due to the existence of multiple binding sites. Thus, the cooperation of chem. and optical input signals cascades several fundamental logic gates within the open form (1O) or closed form (1C) of 1, and the logic functions in 1O and 1C are reversible with photo-switch. Furthermore, photo-switch reversibly reconfigures logic functions from an INHIBIT logic gate (1C) to a half-subtractor (1O). 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. Benzothiophene is relatively a stable molecule. The electrophilic substitution of benzothiophene systems is much less regioselective than that of indoles. It is also used in the manufacturing of dyes such as thioindigo.Recommanded Product: 10243-15-9

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem