Month: February 2021

Electric Literature of 5414-19-7, These common heterocyclic compound, 5414-19-7, name is 1-Bromo-2-(2-bromoethoxy)ethane, 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.

Under an argon atmosphere, NaH (4.11 g, 103 mmol, 60% purity) was added to a solution of ethyl 2-(4-bromophenyl)acetate (10 g, 41.1 mmol) in anhydrous DMF (200 mL) at 0C. The resulting mixture was stirred at 0C for 0.5 h. l-bromo-2-(2-bromoethoxy)ethane (9.5 g, 41.1 mmol) was added and then stirred at 0C for 1 h. NaH (4.11 g, 103 mmol, 60% purity) was added, and the reaction stirred at 0C for an additional 1 h. The resulting mixture was poured into saturated aqueous NH4Cl (200 mL) and extracted with ethyl acetate (3 x50 mL). The combined organic layers were washed with water (2 x50 mL), brine (50 mL), dried over Na2S04, filtered (1369) concentrated, and then purified by column chromatography (Si02, petroleum ether: ethyl (1370) acetate=5 : l) to give ethyl 4-(4-bromophenyl)tetrahydro-2//-pyran-4-carboxylate (5 2 g? 40%) as a yellow oil. 1H MR (400 MHz, CDCI3): d 7.43 (d, 2H), 7.22 (d, 2H), 4.17 (q, 2H), 3.95 (t, 2H), (1371) 3.58 (t, 2H), 2.52 (d, 2H), 1.96 (t, 2H), 1.21 (t, 3H); LCMS: 312.9 [M+H]+.

Statistics shows that 1-Bromo-2-(2-bromoethoxy)ethane is playing an increasingly important role. we look forward to future research findings about 5414-19-7.

Reference:
Patent; METACRINE, INC.; SMITH, Nicholas D.; HUDSON, Andrew R.; CHEN, Mi; NAGASAWA, Johnny Y.; (265 pag.)WO2019/241751; (2019); A1;,
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Some common heterocyclic compound, 18800-30-1, name is 1-Bromo-4-(2-bromoethoxy)benzene, molecular formula is C8H8Br2O, 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. Computed Properties of C8H8Br2O

4-(4-Bromobenzoyl)piperidine (1.4 g, 5.3 mmol),1-(2-Bromoethoxy)-4-bromobenzene (1.9 g, 6.9 mmol), KI (1.6 g, 10 mmol) and 30 mL of ethanol were added to a 100 mL eggplant-shaped flask and heated under reflux, and 5 mL of a 20% KOH solution was added dropwise. The addition was completed in 10 minutes.Reflux for 24 hours, evaporate the solvent and dissolve in 30 mL of dichloromethane.The organic layer was washed three times with 20 mL of water, and the organic layer was concentrated.A mixture of ethyl acetate and petroleum ether was used as the eluent.Column chromatography gave 2.3 g of a white solid with a yield of 92.0%.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 18800-30-1, its application will become more common.

Reference:
Patent; Southeast University; Zhong Yan; Fang Tiantian; Chen Liyi; (24 pag.)CN110437136; (2019); A;,
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Adding a certain compound to certain chemical reactions, such as: 126-38-5, name is 1-Bromo-2,2-dimethoxypropane, belongs to ethers-buliding-blocks compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 126-38-5, Application In Synthesis of 1-Bromo-2,2-dimethoxypropane

Methyl 2-amino-6-chloro-isonicotinate (9.33 g, 50.0 mmol) was suspended in n-propanol. 1-Bromo-2,2-dimethoxypropan (20.26 ml, 150 mmol) was added dropwise. After stirring at reflux for 20 h, n-propanol was removed in vacuo and the residue was recrystallized from diisopropyl ether. 14.55 g (95%) of the title compound were obtained as pale brown solid.1H-NMR (200 MHz, d6-DMSO): delta = 8.29 (s, 1 H), 8.25 (s, 1 H), 7.83 (s, 1 H), 6.14 (br s), 3.95 (s, 3H), 2.53 (s, 3H).

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; NYCOMED GMBH; WO2008/15196; (2008); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Related Products of 4463-59-6, 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. 4463-59-6, name is 1-(2-Bromoethoxy)-2-methoxybenzene belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

To a pre-cooled suspension of 2-bromo-5-fluorophenol (5 g, 26.18 mmol) and potassium carbonate (10.84 g, 78.54 mmol) in DMF (15 mL) at 0-5 C., was added methyl iodide (4.75 mL, 39.27 mmol) and the resulting reaction mixture was stirred at room temperature for 16 hours. The reaction mixture was partitioned between water (20 mL) and EtOAc (50 mL). The organic layer was separated and the aqueous layer was further extracted with EtOAc (3*50 mL). The organic layers were combined, washed with saturated brine solution (20 mL) and dried over Na2SO4, filtered and concentrated in vacuo to afford 1-bromo-4-fluoro-2-methoxybenzene as a colourless liquid in 93% yield, 5.00 g. 1H NMR (400 MHz, DMSO-d6): delta ppm 3.86 (s, 3H), 6.74-6.79 (m, 1H), 7.06 (dd, 1H), 7.57-7.65 (m, 1H).

The synthetic route of 1-(2-Bromoethoxy)-2-methoxybenzene has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Pfizer Limited; Omoto, Kiyoyuki; Owen, Robert McKenzie; Pryde, David Cameron; Watson, Christine Ann Louise; Takeuchi, Mifune; US2014/171435; (2014); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 54314-84-0, name is ((3-Bromopropoxy)methyl)benzene, This compound has unique chemical properties. The synthetic route is as follows., name: ((3-Bromopropoxy)methyl)benzene

[(3-Benzyloxy-propyl)-ethoxy-phosphinoylmethyl]-phosphonic acid diethyl ester To an oven-dried flask was added 10.25 g (44.7 mmol) of (3-Bromo-propoxymethyl)-benzene and 7.67 mL (44.7 mmol) of triethyl phosphite. The flask was fitted with a short-path distillation head, for removal of bromoethane, and the mixture heated at 150¡ã C. for 4 h. The reaction was cooled to ambient temperature, and then diluted with 120 mL of absolute ethanol and 1.8 N KOH (120 mL, 216 mol). The distillation head was replaced with a reflux condenser and the solution heated at reflux for 5 h. The reaction was cooled then concentrated in vacuo. The basic aqueous layer was extracted with EtOAc (2x) and then acidified to pH 3 with conc. HCl. The aqueous layer was extracted with EtOAc (3x) and the combined extracts were dried over MgSO4 and concentrated. The resulting crude product (8.24 g) was used as is in the next reaction. 31P NMR (300 MHz, DMSO-d6) delta34.113.

According to the analysis of related databases, 54314-84-0, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Shakespeare, William C.; Sawyer, Tomi K.; Metcalf III, Chester A.; Wang, Yihan; Bohacek, Regine; US2003/130234; (2003); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 4698-11-7, name is 10-Methoxy-5H-dibenzo[b,f]azepine, A new synthetic method of this compound is introduced below., SDS of cas: 4698-11-7

Example 1 Step 1. Preparation of 10-Methoxy-5H-dibenz [b, f] azepine-5-carbonyl chloride 100 gms of 10 Methoxy iminostilbene is dissolved in 300 mi chloroform & cooled to 0 C Bis (trichlor methyl) carbonate (BTC) 65 gms is added. 67 gms of triethyl amine (TEA) in 100 ml chloroform is added slowly over a period of6 hour & maintaining the temperature 0-5C. Temperature is then increased to 25-30 C 1& maintained for 8 hour. The reaction mixture is poured into 300 mi water & layers are separated. Chloroform is evaporated 10-Methoxy-5H-dibenz [b, f] azepine-5-carbonyl chloride is isolated in methanol. Yield obtained is 110 gms (86%) of theoretical.Example 3 Step 1. Preparation of 10-Methoxy-5H-dibenz [b, f] azepine-5-carbonyl chloride 100 gms of 10-Methoxy iminostilbene is dissolved in 300 ml chloroform & cooled to 0C and 45 gms Bis (trichlor methyl) carbonate (BTC) is added followed by he addition of 45 gms-of-TEA in 100 ml chloroform over a period-of 8 hours maintaining the temperature at 0-5C. The temperature is then increased to 25-30C & maintained for 2 hours. The reaction mixture is poured into 300 ml water layers are separated. Chloroform is evaporated & product is isolated in methanol. Yield obtained is 100 gms (80% of theoretical).

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; AMOLI ORGANICS LTD.; WO2005/66133; (2005); A2;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Related Products of 5473-01-8,Some common heterocyclic compound, 5473-01-8, name is 2-Bromo-6-methoxyaniline, molecular formula is C7H8BrNO, 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.

To a solution of 2-bromo-6-methoxyaniline (1.539 g, 7.62 mmol) in tetrahydrofuran (12 mL) was added 1,1′-bis(diphenylphosphino)ferrocene-palladium(II)dichloride dichloromethane complex (0.297 g, 0.364 mmol). Nitrogen was bubbled through the solution for about 3 minutes, then a 0.35 M in tetrahydrofuran solution of cyclobutylzinc(II) bromide (40 mL, 14.00 mmol) was added dropwise over 5 minutes. The reaction was stirred for 15 hours at ambient temperature. Additional cyclobutylzincbromide solution (24 mL) was added and the mixture was stirred at ambient temperature for 24 hours. The reaction was quenched with saturated aqueous ammonium chloride (50 mL), diluted with methyl tert-butyl ether (400 mL), and the layers were separated. The organic layer was concentrated in vacuo to give crude material that was purified via flash chromatography, eluting on a 40 g silica gel cartridge with 1-60percent methyl tert-butyl ether/hexanes over 40 minutes to provide the title compound. 1H NMR (501 MHz, chloroform-d) delta ppm 6.81 (ddd, J=7.5, 1.7, 0.8 Hz, 1H), 6.77 (t, J=7.7 Hz, 1H), 6.74 (dd, J=7.9, 1.8 Hz, 1H), 3.88 (s, 3H), 3.75 (d, J=17.6 Hz, 2H), 3.59-3.49 (m, 1H), 2.47-2.37 (m, 2H), 2.27-2.16 (m, 2H), 2.09 (tdt, J=10.5, 9.3, 7.9 Hz, 1H), 1.95-1.86 (m, 1H)+ MS (ESI+) m/z 178 (M+H)+.

The synthetic route of 5473-01-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; AbbVie S.a.r.l.; Galapagos NV; Altenbach, Robert J.; Bogdan, Andrew; Couty, Sylvain; Desroy, Nicolas; Gfesser, Gregory A.; Housseman, Christopher Gaetan; Kym, Philip R.; Liu, Bo; Mai, Thi Thu Trang; Malagu, Karine Fabienne; Merayo Merayo, Nuria; Picolet, Olivier Laurent; Pizzonero, Mathieu Rafael; Searle, Xenia B.; Van der Plas, Steven Emiel; Wang, Xueqing; Yeung, Ming C.; (189 pag.)US2019/77784; (2019); A1;,
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589-10-6, name is (2-Bromoethoxy)benzene, belongs to ethers-buliding-blocks compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. HPLC of Formula: C8H9BrO

Upon stirring a solution of p-anisoyl chloride (8.53 g, 50 mmol) and beta-bromophenetole (10.05 g, 50 mmol) in 20 mL of anhydrous nitrobenzene at 5 C. under a nitrogen atmosphere, 7.33 g (55 mmol) of anhydrous aluminum chloride was added portionwise. The resulting mixture was stirred at room temperature for 1 hour then at a reduced pressure for 5 minutes to remove the HCl gas produced during the reaction. Stirring was continued at room temperature under the nitrogen atmosphere for another hour. Nitrobenzene was removed at 45 C./0.4 mmHg and the solids deposited were dissolved in 60 mL of chloroform. Upon stirring the solution in an ice bath, 25 mL of 2M HCl was added portionwise. The organic layer was separated and washed with 20 mL of saturated sodium hydrogencarbonate aqueous solution, dried over solid NaHCO3, and filtered through a filter paper. Solvent was removed from the filtrate using a rotary evaporator and the crude product was purified by silica gel column chromatography (particle size 32-63) in CHCl3. The product with Rf=0.26 was collected and recrystallized from chloroform/hexane to give 14.44 g (43 mmol, 86% yield) of white flakes. m.p. 112.2-113.3 C. E.A. C16H15BrO3, calculated C 57.32, H 4.52, Br 23.83; found C 57.40, H 4.55, Br 23.76. 1H-NMR (DMSO-d6) delta 3.86 (m, 5H, -OCH3, -OCH2CH2Br), 4.44 (t, 2H, J=5.40, 5.04 Hz, -OCH2CH2Br), 7.08 (d, 2H, J=8.64 Hz, aromatic H’s), 7.11 (d, 2H, J=8.64 Hz, aromatic H’s), 7.71 (d, 2H, J=2.52 Hz, aromatic H’s), 7.73 (d, 2H, J=2.52 Hz, aromatic H’s). 13C-NMR (DMSO-d6) 31.17, 55.51, 67.97, 113.75, 114.33, 129.88, 130.44, 131.84, 161.11, 162.54, 193.12.

The synthetic route of 589-10-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Mills, Randell L.; Wu, Guo-Zhang; US2005/80260; (2005); A1;,
Ether – Wikipedia,
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Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 93919-56-3, name is (4-(Trifluoromethoxy)phenyl)methanamine, This compound has unique chemical properties. The synthetic route is as follows., Computed Properties of C8H8F3NO

General procedure: All purchased chemicals were used without further purification. All solvents were HPLC grade. Boc-Trp-OH (1.00 mmol) was dissolved in 10 mL of dioxane under nitrogen. Carbonyldiimidazole(1.02 mmol) was then added in a stepwise manner and the resulting mixture stirred for 3 h at room temperature and then heated to 50C for 30 min. The desired amine (1.03 mmol) was added to the reaction mixture at room temperature and stirring was continued for 48 h. The solvent was removed under reduced pressure and crude product was extracted with ethyl acetate (3 x 20 ml). The organic extracts were washed with 1M hydrochloric acid (15 mL), saturated sodium bicarbonate solution (15 mL) and water (15 mL), then dried over anhydrous MgSO4 and the solvent was removed under reduced pressure. To this crude compound in water (1 mL) was added anisole (2.00 mmol). The solution was then cooled to 0C prior to addition of trifluoroacetic acid (30.00 mmol) in 1 mL of water. After stirring for 1 h at 0C, the reaction mixture was allowed to warm to room temperature and stirring was continued for 12 h. The reaction mixture was then diluted with ethyl acetate (15 mL) and washed with saturated sodium bicarbonate solution (15 mL), water (15 mL) and brine solution (15 mL) and dried over anhydrous MgSO4. The solvent was removed under reduced pressure to afford the crude free amine which was directly used in the next step without further purification. To a solution of the above crude amine in dichloromethane (5 mL) was added carbonyldiimidazole (1.2 mmol) under nitrogen at room temperature. After 3 h stirring, morpholine or 1-Boc-piperazine (1.55 mmol) was added to the reaction mixture and stirred for another 12 h at room temperature. The solvent was removed under reduced pressure, diluted with ethyl acetate (15 mL) and washed with 1M hydrochloric acid (15 mL), saturated sodium bicarbonate solution (15 mL), brine solution (15 mL) and dried over anhydrous MgSO4. The crude product was then purified by preparative HPLC (Gradient 0 to 100% of 95/5 acetonitrile/water solution over 25 min) and freeze-dried. NMR spectral data of all synthesized compounds 1-10 are included in the supporting information (S1-S10 Figs). NMR spectra were recorded on Bruker Avance DRX-600 and Varian 400 MHz spectrometers at 298 K with TMS as internal standard. High-resolution mass spectrometry (HRMS) was performed on a Bruker micro-TOF by directin fusion in acetonitrile/H2O 70:30 at 3 muL/min using sodium formate clusters as an internal calibrant. Semi-preparative RP-HPLC purification of the compounds was performed using a Waters Delta 600 chromatography system fitted with a Waters 486 tuneable absorbance detector with detection at 214 nm. Purification was performed by eluting with solvents A (0.1% TFA in water) and B (9:1 CH3CN:H2O, 0.1% TFA) on a Vydac C18 250 x 22 mm (300 A) steel jacketed column at 20 mL/min. NH peak of Indole is not observed in some of the compounds in CDCl3 due to peak broadness.

Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand reaction routes of 93919-56-3.

Reference:
Article; Duprez, Wilko; Bachu, Prabhakar; Stoermer, Martin J.; Tay, Stephanie; McMahon, Roisin M.; Fairlie, David P.; Martin, Jennifer L.; PLoS ONE; vol. 10; 7; (2015);,
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In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 22483-09-6 as follows. SDS of cas: 22483-09-6

50 g (270.2 mmol) 4-bromobenzaldehyde were dissolved in 200 ml of toluene and 28.4 g (270.2 mmol) aminoacetaldehyde dimethylacetal were added.. After the addition of 5.1 g (27.0 mmol) p-toluenesulfonic acid monohydrate, the reaction mixture was heated under reflux in a Dean Stark apparatus. After 4 h, the reaction was cooled to room temperature and washed with saturated sodium hydrogen carbonate-solution (2x) and water. The combined aqueous layers were extracted with Toluene and the combined organic layers were dried over magnesium sulfate and evaporated. The residue was dissolved in 200 ml of ethanol and 5.11 g (135.1 mmol) of sodium borohydride were added in small portions. After stirring for 2 h at room temperature and standing overnight, 5.0 ml acetic acid were added and the solvent was removed i. vac. The residue was taken up in dichloromethane and washed (2x) with water. After drying over magnesium sulfate and evaporation, 60.5 g of the title compound were obtained (crude product), which were used without further purification. Rt = 0.80 min (Method C). Detected mass: 274.1/276.1 (M+H+).

According to the analysis of related databases, 22483-09-6, the application of this compound in the production field has become more and more popular.

Reference:
Patent; SANOFI-AVENTIS; WO2008/77552; (2008); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem