Author: Jessica.F

Chemistry graduates have much scope to use their knowledge in a range of research sectors, including roles within chemical engineering, chemical and related industries, healthcare and more. , Formula: C8H3Cl2NO2

4,7-Dichloroisotin (30.05 g, 139.1 mmol, 1.0 equiv, Alfa Aesar lot 10173559) and MeOH (450 mL, 15 vol) were charged to a 2-L, three-neck, round-bottom flask equipped with nitrogen line, overhead mechanical stirrer, and a temperature probe. Diethylamine (3.25 g, 0.32 equiv, Sigma- Aldrich lot SHBD5313V) was added over 3 min (the slurry becomes dark red). A very slight increase in temperature (from 17.5 C to 18.8 C) was observed. 1- [4-(Dimethylamino)phenyl]ethanone 2 (44.3 g, 1.95 equiv, ArkPharm lot 0000197- 130717000) was then added via a plastic funnel and the funnel was rinsed with MeOH (75 mL, 2.5 vol). A decrease in the reaction temperature to 15.1 C was observed. Upon stirring for a few minutes, a dark red solution with a few undissolved particles was obtained. The solution was stirred at ambient temperature and periodically sampled for in-process control (IPC) by HPLC. After 23 h of reaction, additional diethylamine was added via syringe (1.42 g, 0.14 equiv) and the stirring continued at ambient temperature. After 40.5 h, a light slurry formed. Solid 2 was added in portions (54.1 g, 2.38 equiv, ArkPharm lot 0000197- 130717000 and 3.2 g, 0.14 equiv, TCI lot GK01-BRAH) for a total of 4.47 equiv of acetophenone 2. After 88 h of reaction, IPC by HPLC showed less than 1% AUC of isatin 1 present in the reaction mixture. A heavy precipitate had formed. After 4.5 days, the reaction mixture was concentrated under reduced pressure (water bath <40 C), then under high vacuum to afford approximately 84 g of a solid mixture, lot BIO-W-22-11. The solid was dissolved in a mixture of dichloromethane (385 mL) and MeOH (140 mL) and adsorbed over 100 g of silica gel. The solvent was removed under reduced pressure and the dry product/silica mixture was loaded onto a column containing silica gel (1 kg, pre-packed with heptanes) for a flash chromatographic purification. Elution was started with 10% ethyl acetate in heptanes and a gradient up to 100% ethyl acetate was applied, and then switched to 10% methanol in ethyl acetate. Fractions of 500 mL and up to 2 L were collected. The product containing fractions, where product had started to precipitate, were combined and concentrated down to approximately 1 L. The resulting precipitate was filtered out, reslurried in EtOAc/MeOH (75:25 ratio, 200 mL), filtered, and washed with MeOH to afford a first crop of compound. The first filtrate was concentrated to a low volume, added MeOH to precipitate a second crop of compound. Filtrates from isolation of both crops were combined, concentrated to a low volume, taken up in 25 mL of MeOH, and the resulting solid was filtered to afford a third crop of compound. All three crops were dried under high vacuum at ambient temperature for a day and at 40 C for four days. The total combined weight was 40.03 g, corresponding to 76% yield of compound (uncorrected by purity or solvent content). Solid is off-white (with a very pale yellow to peach shade. The potential utility of systematic synthetic strategy will be applicable to efficient generations of chemical libraries of compounds to find ‘hit’ molecules.Read on for other articles about 18711-13-2. Reference:
Patent; TOKALAS, INC.; VERNIER, Jean-michael; (82 pag.)WO2016/57698; (2016); A1;,
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Healthcare careers for chemists are once again largely based in laboratories, although increasingly there is opportunity to work at the point of care, helping with patient investigation., 15362-40-0

To the four-necked flask was added 668 ml of water and then compound IV (233 g, 0.84 mol), potassium hydroxide (94.3 g,1.68 mol), heated to 100 C for 5 hours, cooled to 60 C to 65 C,Vacuum filter, add a small amount of water, filter cake at 85 CAfter dissolution in water, zinc chloride (229 g, 1.68 mol 1) in water was added, reacted at 85 C for 1 hour,Cooling, filtration was white solid 488.5g (compound I: diclofenac zinc), the yield of 89%

As always, wish you can browse a selection of our May HOT articles below about 1-(2,6-Dichlorophenyl)-2-indolinone.

Reference:
Patent; Jilin University; Liaoyuan Yinying Pharmaceutical Co., Ltd.; Li Guiying; Wang Zhaokun; Li Shumei; Peng Xiaojuan; Jin Xingtong; (8 pag.)CN106905178; (2017); A;,
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61-70-1, Having gained chemical understanding at molecular level, chemistry graduates may choose to apply this knowledge in almost unlimited ways, as it can be used to analyze all matter and therefore our entire environment.

General procedure: An oven-dried reflux tube equipped with a magnetic stir bar and a Teflon stopcock was charged with aryl halide (1 mmol), oxindole (1 mmol),potassium carbonate (1.1 mmol), catalyst nanoparticles (0.05 mmol)and 1,4-dioxane (2 ml) and heated at 70 C. The mixture was vigorously stirred under these reaction conditions and completion of the reaction was monitored by TLC (EtOAc: n-hexane, 25:75). After completion of the reaction, the reaction mixture was cooled to room temperature, the magnetic nanoparticles of the catalyst were collected using a magnet. Ethyl acetate (5 mL) and water (10 mL)were added to the mixture in the next step. The aqueous layer was furtherextracted by ethyl acetate (2*5 mL). The combined organic layerswere washed with saturated brine, dried over CaCl2, filtered, and concentrated to give a residue which was purified by recrystallization from ethanol and water or by column chromatography on silica gelusing EtOAc: n-hexane, 1:7.

By the way, if you are interested in learning more fun chemistry with your kids, get your hands into one chemistry set now, and start enjoying the best part of chemistry: experiments about 61-70-1.

Reference:
Article; Moghaddam, Firouz Matloubi; Tavakoli, Ghazal; Latifi, Fatemeh; Saeednia, Borna; Catalysis Communications; vol. 75; (2016); p. 37 – 41;,
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Reference of 3484-35-3, Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes.

General procedure: To a solution of 3-substituted-5-benzylidene-2-thioxo-4-thiazolidinone (1-19) (0.003 mol) in 1,4-dioxane (15 mL) was added HC(OEt)3(2 mL) and BF3Et2O (2 mL). The reaction mixture washeated to 80 C and stirring was continued at the same temperature for 4 h. Theresulting 2-ethylthio-3-substituted-5-benzylidene- 4-thiazolium fluoroborate (Ic, IIc) was precipitated, filteredoff, and dried without any additional purification, as starting material forthe following reactions. To a mixture of thiazolium fluoroborate (Ic, IIc) (0.003 mol) and correspondingindolin-2-one (0.003 mol) in acetonitrile (15 mL) was added triethylamine (0.91g, 0.009 mol) dropwise at 25 C, and the mixture was stirred for 4 h at thesame temperature. The orange precipitate was collected and washed with ethylacetate (8 mL). The crude product thus obtained was recrystallized frommethanol or acetone to give compound (1-19).

Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.Read on for other articles about 3484-35-3.

Reference:
Article; Wang, Feng; Liu, Zijian; Wang, Jian; Tao, Jun; Gong, Ping; Bao, Xue; Zhao, Yanfang; Wang, Yulin; European Journal of Medicinal Chemistry; vol. 101; (2015); p. 126 – 132;,
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Application of 2058-72-2, The chemical industry reduces the impact on the environment during synthesis 2058-72-2, name is 5-Bromo-1-methylindoline-2,3-dione, I believe this compound will play a more active role in future production and life.

General procedure: A mixture of isatin 2 (0.8 mmol), malononitrile (1.0 mmol) and Ca(OH)2 (0.8 mmol, 59.2 mg) in 5.0 mL of methanol was stirred at roomtemperature for 10 min followed by the addition of chrysin 1(0.5 mmol), which was stirred under reflux for 8 h. After completion ofthe reaction, as indicated by TLC, the mixture was cooled to roomtemperature and then purified by flash chromatography to afford thecorresponding product 3.

Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.Read on for other articles about 2058-72-2.

Reference:
Article; Zhang, Wen-Hui; Chen, Shuang; Liu, Xiong-Li; Feng, Ting-Ting; Yang, Wu-De; Zhou, Ying; Bioorganic and Medicinal Chemistry; vol. 27; 22; (2019);,
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Chemical research careers are more diverse than they might first appear, as there are many different reasons to conduct research and many possible environments. category: indolines-derivatives

0.69 ml of n-Butyl lithium (2.5M solution in hexane) was added dropwise to a stirred solution of 5-bromo-1,3-dihydro-isoindole-2-carboxylic acid tert-butyl ester (429 mg; 1.44 mmol) in anhydrous THF (10 ml) at -78 C. under an atmosphere of nitrogen. The reaction was stirred for 50 minutes then 1-methyl-4-piperidone (212 mul; 1.2 equiv.) was added and stirred at -78 C. for a further 60 minutes then warmed to room temperature. The reaction was quenched with saturated ammonium chloride solution then extracted with EtOAc. The EtOAc layer was washed with saturated NaHCO3, brine, dried (MgSO4) and evaporated. Purification by flash column chromatography on SiO2, gradient elution from 0% to 10% 2M methanolic ammonia/DCM gave 111 mg of 5-(4-hydroxy-1-methyl-piperidin-4-yl)-1,3-dihydro-isoindole-2-carboxylic acid tert-butyl ester as a colourless oil.

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

Reference:
Patent; ASTEX THERAPEUTICS LIMITED; US2010/152184; (2010); A1;,
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These common heterocyclic compound, 61-70-1, name is 1-Methylindolin-2-one, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. Recommanded Product: 61-70-1

General procedure: Isatin (0.1 mol, 14.7 g) was dissolved in DMF (60 mL) and finely ground anhydrous K2CO3 (0.15 mol,20.7 g) was added under stirring. RX (0.15 mol) was added dropwise and mixture was heated at 60-70C for 3 h (as alkylation reagent RX were used Me2SO4, EtI, n-PrBr, AmBr, BnCl, PMBCl,respectively). After cooling to room temperature mixture was poured into ice water (200 mL).Precipitated orange solid was filtereted, washed with water and recrystallized from ethanol (95%) togive N-alkylated isatins as red crystalls in 37-92% yield. The purity of obtained compounds weredetermined by melting points, which corresponded to those published in the literature (ref. 2-4).N-Substituted isatin (10 mmol) was mixed with 16 M N2H4·H2O (15 mL). The suspension was heatedat reflux 3 h (caution: rapid gas evolution), then it was cooled to room temperature, diluted with waterS4(40 mL) and extracted with EtOAc (3 x 25 mL). Organic phase was washed with water (25 mL), brine (25 mL), then it was dried over Na2SO4 and evaporated under reduced pressure to give the desired product. The latter was recrystallized from hexane and small amount of EtOAc to give N-substituted indolin-2-one as yellow solid in 47-96% yield. The purity of obtained compounds were determined by melting points and 1H NMR spectra data, which corresponded to those published in the literature (ref. 5,6).N-Substituted indolin-2-one (2 mmol) were dissolved in dry DMF (5 mL) and NaH (60% dispersion in mineral oil, 6 mmol, 240 mg) was portionwise added carefully at a temperature of -15 C. When the rapid evolution of H2 stops, the mixture allowed to stir for 10 min. Then solution of 1,2-dibromoethane (508 mg, 2.7 mmol) in dry DMF (3 mL) was added to the mixture. The latter was warmed to room temperature and stirred overnight. Then it was cooled with ice, diluted with water (20 mL) and extracted with PhMe (2 x 15 mL). Organic phase was washed with water (2 x 15 mL), brine (15 mL) and then it was dried over Na2SO4. Evaporation under reduced pressure gave the desired product. The latter was washed with hexane to remove mineral oil or purified by flash column chromatography (eluent: hexane/CH2Cl2). The spiro[cyclopropane-1,3′-indolin]-2′-ones 1 are yellow solids, except N-amyl substituted spiro[cyclopropane-1,3′-indolin]-2′-one, which is brown liquid. The purity of obtained compounds were determined by 1H NMR spectra data. Corresponding cyclopropanes were previously known in the literature (ref. 7-11).

This is the end of this tutorial post, and I hope it has helped your research about 61-70-1.

Reference:
Article; Buev, Evgeny M.; Moshkin, Vladimir S.; Sosnovskikh, Vyacheslav Y.; Tetrahedron Letters; vol. 59; 37; (2018); p. 3409 – 3412;,
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Career opportunities within science and technology are seeing unprecedented growth across the world, and those who study chemistry or another natural science at university now have increasingly better career prospects. Recommanded Product: Potassium 1,3-dioxoisoindolin-2-ide

General procedure: Potassium phthalimide (0.93 g, 5 mmol) was added to a solution of 1,2-dibromoethane (1.3 mL, 15 mmol) in DMF (8 mL). The mixture was stirred at room temperature overnight and evaporated the solvent in vacuo, the residue dissolved in H2O and extracted with ethyl acetate. The organic layer was washed by brine and dried by MgSO4. Filtered and the solvent evaporated in vacuo, recrystallized from ethyl acetate to give white solid (566 mg, 45 %).

Keep reading other articles of Potassium 1,3-dioxoisoindolin-2-ide! Don’t worry, you don’t need a PhD in chemistry to understand the explanations! I believe this compound will play a more active role in future production and life.

Reference:
Article; Zhang, Wei; Zhou, Xin-Yang; Yu, Qin-Ying; Du, Lu-Pei; Li, Min-Yong; Chinese Chemical Letters; vol. 27; 2; (2016); p. 185 – 189;,
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In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 1254319-51-1, name is 6-Bromo-2-methylisoindolin-1-one belongs to indolines-derivatives compound, it is a common compound, a new synthetic route is introduced below. Related Products of 1254319-51-1

6-Bromo-2-raethylisoindolin-l-one (723 mg, 3.41 mmol), bis(pinacolato)diboron (1.04 g, 4.09 mmol), potassium acetate (1.00 g, 10.2 mmol) and PdCl2(dppf) catalyst (139 mg, 0.17 mmol) were weighed into a flask which was sealed under N2. DMSO (15 mL) was added, and the entire mixture stirred at 90C for 5 h. Upon cooling, the reaction mixture was diluted with water (250 mL) and extracted with CH2C12 (5×50 mL). The combined CH2C12 fractions were in turn washed with water (2×100 mL), brine (100 mL), dried (Na2S04), filtered and the solvent removed under reduced pressure to yield the crude product. Purification was carried out by flash column chromatography on silica gel (20% THF/CH2C12 as eluant) to give the title compound as a crystalline beige solid (262 mg, 28%). NMR [400 MHz, (CD3)2SO] delta 7.91 (br s, 1 H), 7.85 (dd, J = 7.6, 1.0 Hz, 1 H), 7.59 (dd, J = 7.5, 0.6 Hz, 1 H), 4.49 (s, 2 H), 3.07 (s, 3 H), 1.32 (s, 12 H). LRMS (APCI+) calcd for Ci5H2iBN03 274 (MH+), found 274.

The synthetic route of 1254319-51-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; PETER MACCALLUM CANCER INSTITUTE; SPICER, Julie Ann; HUTTUNEN, Kristiina Maria; LYONS, Dani Michelle; TRAPANI, Joseph Albert; SMYTH, Mark John; DENNY, William Alexander; WO2011/75784; (2011); A1;,
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Electric Literature of 6326-79-0, Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes.

The mixture of IX-1 (6.5 g, 28.7 mmol), malonic acid (3.3 g, 31.7 mmol), NaOAc (2.95 g, 36 mmol) in AcOH (60 mL) were stirred at rt. After 6 hrs, NaOAc (2.95 g, 36 mmol) was added additional, then refluxed overnight. After cooling, the mixture was filtered and the filtrate was washed with water and EtOAc, then dried under reduced pressure to afford IX-2 (5 g, yield 66%) as a brown oil, which was used for next step directly.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 6-Bromoisatin, and friends who are interested can also refer to it.

Reference:
Patent; Buckman, Brad Owen; Nicholas, John Beamond; Emayan, Kumaraswamy; Seiwert, Scott D.; US2014/200215; (2014); A1;,
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