Heterocyclic Building Blocks-Benzothiophene

Brief introduction of 3541-37-5

3541-37-5, The synthetic route of 3541-37-5 has been constantly updated, and we look forward to future research findings.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.3541-37-5,Benzo[b]thiophene-2-carboxaldehyde,as a common compound, the synthetic route is as follows.

To a cooled mixture of thionyl chloride (20 ml, 274 mmol) and DMF (0.7 ml) at 0 C, benzothiophene 2-carboxaldehyde (4.7 g, 29.0 mmol) was added in 3 portionas, and stirred at 0 C for 30 minutes and then a;lowed to warm for about 15 hours. The mixture was poured into ice and aqueous IN sodium hydrogen carbonate and then extracted with EtOAc. The combined organic solution was washed with brine and dried (Na2S04) and concentrated in vacuo to provide Int-76a (6.1 g, 28.1 mmol, 97 % yield).

3541-37-5, The synthetic route of 3541-37-5 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; MERCK SHARP & DOHME CORP.; KOZLOWSKI, Joseph A.; ROSENBLUM, Stuart B.; COBURN, Craig A.; SHANKAR, Bandarpalle, B.; ANILKUMAR, G., Nair; CHEN, Lei; DWYER, Michael, P.; JIANG, Yueheng; KEERTIKAR, Kartik, M.; LAVEY, Brian, J.; SELYUTIN, Oleg, B.; TONG, Ling; WONG, Michael; YANG, De-Yi; YU, Wensheng; ZHOU, Guowei; WU, Hao; HU, Bin; ZHONG, Bin; SUN, Fei; JI, Tao; SHEN, Changmao; RIZVI, Razia; ZENG, Qingbei; WO2012/41014; (2012); A1;,
Benzothiophene – Wikipedia
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Analyzing the synthesis route of 4923-87-9

4923-87-9, As the paragraph descriping shows that 4923-87-9 is playing an increasingly important role.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.4923-87-9,5-Bromobenzothiophene,as a common compound, the synthetic route is as follows.

(A) To a cooled (-10 C. to 5 C.) solution of diisopropylamine (422 g, 4.17 mol) in anhydrous THF (4.0 L) was added n-butyllithium (1517 mL of 2.5 M in hexane, 3.79 mol) in drop-wise fashion over a period of 1.5 h under an inert atmosphere of nitrogen. Upon completion of the addition, the reaction solution was stirred at -10 C. to 0 C. for an additional 30 min, and then cooled to -78 C. A solution of 5-bromobenzo[b]thiophene (670 g, 3.16 mol) and TMSCl (512 g, 4.74 mol) in THF (3.4 L) was added in drop-wise fashion and the resulting reaction mixture was stirred at -78 C. After completion of the reaction, as judged by HPLC analysis, aq. NH4Cl solution (5% w/w, 2 L) was added in drop-wise fashion into the reaction mixture while still under a nitrogen atmosphere and maintaining a temperature between -78 C. and -65 C. The mixture was then allowed to warm to rt and the aqueous phase was removed. Water (2 L) was added to the organic phase and after stirring at room temperature for 15 min, the aqueous phase was removed. The combined aqueous layers were back-extracted with EtOAc (2 L), and the combined organic extracts were washed with sat.d aq. NaCl (2 L), dried (Na2SO4) and concentrated under reduced pressure to provide (5-bromobenzo[b]thiophen-2-yl)trimethylsilane (867 g, purity: 90.0 LCAP) as a light yellow liquid. 1H NMR (CDCl3) delta 7.93 (d, J=1.5 Hz, 1H), 7.72 (d, J=8.4 Hz, 1H), 7.39 (d, J=8.4 Hz, 1H), 7.36 (s, 1H), 0.37 (s, 9H); LC/MS (APCI+) m/z 283.9 [M]+.

4923-87-9, As the paragraph descriping shows that 4923-87-9 is playing an increasingly important role.

Reference：
Patent; Janssen Pharmaceutica NV; Liang, Yin; Demarest, Keith T.; (109 pag.)US2017/290800; (2017); A1;,
Benzothiophene – Wikipedia
Benzothiophene | C8H6S – PubChem

Analyzing the synthesis route of 360575-29-7

360575-29-7, As the paragraph descriping shows that 360575-29-7 is playing an increasingly important role.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.360575-29-7,Methyl 4-bromobenzo[b]thiophene-2-carboxylate,as a common compound, the synthetic route is as follows.

A mixture of 750 mg of methyl 4-bromobenzo[b]thiophene-2-carboxylate, 438 mg of phenyl boronic acid, 610mg of lithium chloride, 528 mg of sodium carbonate, 160 mg of tetrakis(triphenylphosphine)palladium (0), 30 ml of 1,4-dioxane, and 15 ml of water was stirred for 4 hours at 100C. After being cooled to room temperature, the reactionmixture was concentrated under reduced pressure. Chloroform and water were added to the residues, and insolublematter was separated by filtration. The aqueous layer was extracted twice by using chloroform, and the collected organiclayer was washed with saturated saline, dried over magnesium sulfate, and then concentrated under reduced pressure.The residues were subjected to silica gel column chromatography, thereby obtaining 477 mg of methyl 4-phenylbenzo[b]thiophene-2-carboxylate

360575-29-7, As the paragraph descriping shows that 360575-29-7 is playing an increasingly important role.

Reference：
Patent; Sumitomo Chemical Company Limited; MUKUMOTO, Fujio; TAMAKI, Hiroaki; KUSAKA, Shintaro; IWAKOSHI, Mitsuhiko; EP2926660; (2015); A1;,
Benzothiophene – Wikipedia
Benzothiophene | C8H6S – PubChem

Some tips on 34761-09-6

34761-09-6 Ethyl 3-aminobenzo[b]thiophene-2-carboxylate 731510, abenzothiophene compound, is more and more widely used in various fields.

34761-09-6, Ethyl 3-aminobenzo[b]thiophene-2-carboxylate is a benzothiophene compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

(2) Ethyl 3-aminobenzo[b]thiophene-2-carboxylate (10 g, 45.2 mmol), and carbamimidic chloride hydrochloride (7.27 g, 63.3 mmol) in diglyme (90 mL) were heated to 160C for 12 hrs. The reaction solution was cooled to room temperature, filtered, washed with ether and hexanes and dried in vacuo for 3 hrs yielding 10.56 g (108% yield) of crude grey solids of the 2-aminobenzo[4,5]thieno[3,2-d]pyrimidin-4(3H)-one. Used as is without further purification., 34761-09-6

34761-09-6 Ethyl 3-aminobenzo[b]thiophene-2-carboxylate 731510, abenzothiophene compound, is more and more widely used in various fields.

Reference：
Patent; Universal Display Corporation; Joseph, Scott; Boudreault, Pierre-Luc T.; Dyatkin, Alexey Borisovich; Li, David Zenan; Xia, Chuanjun; Yamamoto, Hitoshi; EP2910555; (2015); A1;,
Benzothiophene – Wikipedia
Benzothiophene | C8H6S – PubChem

Some tips on 95-15-8

As the paragraph descriping shows that 95-15-8 is playing an increasingly important role.

95-15-8, Thianaphthene is a benzothiophene compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

95-15-8, Under inert conditions benzo[b]thiophene (7.00 g, 51.1 mmol,1.00 equiv) was dissolved in dry THF and stirred for 30 min at-78 C. n-BuLi (26.6 mL, 2.5 M in hexane, 66.5 mmol, 1.30equiv) was added slowly, and the mixture was stirred for 30min. MeI (4.90 mL, 11.2 g, 78.9 mmol, 1.54 equiv) was addedover 15 min. The reaction was stirred for 20 min at -78 C, for 3h at r.t., quenched with water (100 mL), and extracted withEtOAc (4 × 50 mL). The organic layer was dried over Na2SO4, andthe solvents were removed in vacuo. After purification by flashchromatography (silica, hexane), 5 could be obtained as acolourless solid in 97% yield (7.26 g, 49.0 mmol). TLC (SiO2, hexane):Rf = 0.54. 1H NMR (400 MHz, DMSO-d6): delta = 7.85 (dp, J =7.8, 0.7 Hz, 1 H), 7.74-7.64 (m, 1 H), 7.35-7.21 (m, 2 H), 7.12 (p,J = 1.2 Hz, 1 H), 2.56 (d, J = 1.2 Hz, 3 H) ppm. 13C NMR (101 MHz,DMSO-d6): delta = 140.57, 140.09, 138.88, 124.19, 123.46, 122.57,122.05, 121.78, 15.74 ppm. MS (EI): m/z [M]+ calcd for C9H8S:148.0342; found: 148.0341.

As the paragraph descriping shows that 95-15-8 is playing an increasingly important role.

Reference：
Article; Hofsaebeta, Robert; Rombach, David; Wagenknecht, Hans-Achim; Synlett; vol. 28; 12; (2017); p. 1422 – 1426;,
Benzothiophene – Wikipedia
Benzothiophene | C8H6S – PubChem

New learning discoveries about 5381-20-4

The synthetic route of 5381-20-4 has been constantly updated, and we look forward to future research findings.

5381-20-4, Thianaphthene-3-carboxaldehyde is a benzothiophene compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: A mixture of malononitrile (1.1 mmol) and substituted aldehydes(1.0 mmol) in ethanol in the presence of triethylamine wasstirred at room temperature. After the complete disappearance ofboth starting materials (monitored by TLC), 2-thioxo-1, 3-thiazolidin-4-one (1.0 mmol) was added and the stirring wascontinued for 2 -2hrs. The completion of the reaction wasmonitored by TLC. The solid formed in the reaction mixture wasfiltered, dried and recrystallized in ethanol to obtain the pureproduct in good yields., 5381-20-4

The synthetic route of 5381-20-4 has been constantly updated, and we look forward to future research findings.

Reference：
Article; Noorulla; Suresh, Ayyadurai Jerad; Devaraji, Vinod; Mathew, Bijo; Umesh, Devi; Journal of Molecular Structure; vol. 1147; (2017); p. 682 – 696;,
Benzothiophene – Wikipedia
Benzothiophene | C8H6S – PubChem

More research is needed about 4923-87-9

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 4923-87-9, help many people in the next few years.Product Details of 4923-87-9

Chemistry, like all the natural sciences, begins with the direct observation of nature— in this case, of matter. Product Details of 4923-87-9, C8H5BrS. A document type is Article, introducing its new discovery., Product Details of 4923-87-9

A range of different N- and S-containing heterocyclic bromides can be efficiently coupled with gaseous ammonia in the presence of copper(II) acetylacetonate [Cu(acac)2] as catalyst and in the absence of additional ligands. Unstable aminothiophenes and aminobenzothiophenes can be further reacted in situ to afford functionalized derivatives. Copyright

Reference：
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Extracurricular laboratory:new discovery of 5-Bromobenzothiophene

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.Application of 4923-87-9

Application of 4923-87-9, Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. 4923-87-9, Name is 5-Bromobenzothiophene,introducing its new discovery.

A method for using amine-borane complexes directly in palladium catalyzed borylation has been developed. The reaction proceeds through the sequential formation of a boronium species followed by deprotonation leading to the aminoborane. This reagent is then directly used in the borylation process leading, after work-up, to various boronic acid derivatives. The reaction was applied to (hetero)aryl triflates, iodides, bromides and chlorides.

Reference：
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

Extended knowledge of 2,3-Dibromobenzo[b]thiophene

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6287-82-7, In an article, published in an article,authors is Carril, Monica, once mentioned the application of 6287-82-7, Name is 2,3-Dibromobenzo[b]thiophene,molecular formula is C8H4Br2S, is a conventional compound. this article was the specific content is as follows.

The first series of oxcarbazepine analogues, starting from readily-available materials and through a high-yielding five-step sequence based on palladium catalysis, is reported. The so-obtained compounds incorporate not only a variety of substituents in both of the aryl rings comprising the framework of an oxcarbazepine, but also involve the more challenging palladium-catalysed coupling of a number of heteroaromatic substrates. The addition of small amounts of water in some of the metal-catalysed processes showed a beneficial effect, highly increasing the selectivity of such reactions.

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Reference：
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem

The Absolute Best Science Experiment for 6-Methylbenzo[b]thiophene

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Safety of 6-Methylbenzo[b]thiophene, you can also check out more blogs about16587-47-6

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Safety of 6-Methylbenzo[b]thiophene. Introducing a new discovery about 16587-47-6, Name is 6-Methylbenzo[b]thiophene

Ninety sulfur compounds consisting of mercaptans, sulfides and thiophenes, were identified in a fluid-catalytic-cracking light cycle oil using gas chromatography with atomic emission detection. Their retention times and indices were correlated with molecular descriptors generated from their molecular structures. The best seven- and eight-parameter multi-linear regression models showed good predictive ability. The descriptors involved in the models reflect the geometrical, topological, and electronic properties of the molecules, related to the interactions between the solute and the stationary phase. For the 34 thiophenic sulfur compounds (benzothiophenes and dibenzothiophenes) of most interest in petroleum processing, another two five-parameter multi-linear models were developed for retention times and indices with standard errors s = 0.61 and 1.63, respectively. Such models for retention times and/or indices can be used for identification of unknown chromatographic peaks by matching their retention times or indices with those of sulfur compounds of known molecular structure when the corresponding chemical standards are unavailable.

Reference：
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem