Ethers-buliding-blocks

Reference of 20781-20-8, 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. 20781-20-8, name is (2,4-Dimethoxyphenyl)methanamine belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

According to Scheme 35, a 10 mL micro wavable vial was charged with compound 10 (250 mg, 0.73 mmol), 2,4-dimethoxybenzylamine (Aldrich, 0.54 mL, 3.63 mmol), Pd2(dba)3 (21 mg, 0.036 mmol), NaOBu-t (140 mg, 1.46 mmol), BINAP (45 mg, 0.07 mmol) and dioxane/DMF (3 mL/1 mL). The mixture was purge with argon and then stirred at 160C under microwave for 20 min. The reaction mixture was cooled to room temperature and diluted with EtOAc. The EtOAc was isolated and dried over MgS04. The EtOAc was evaporated and the residue was subjected to flash column chromatography (hexanes/EtOAc) to give compound 11 as white solid (yield 55%) (m/z + H) 474.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, (2,4-Dimethoxyphenyl)methanamine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; PURDUE PHARMA L.P.; NI, Chiyou; SHAO, Bin; TAFESSE, Laykea; YAO, Jiangchao; YU, Jianming; ZHOU, Xiaoming; WO2012/35421; (2012); A2;,
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Synthetic Route of 36865-41-5, The chemical industry reduces the impact on the environment during synthesis 36865-41-5, name is 1-Bromo-3-methoxypropane, I believe this compound will play a more active role in future production and life.

To a solution of the compound of Reference Example 76-1 (94.0 mg, 0.21 mmol) in DMF (5 mL), potassium carbonate (87.0 mg, 0.63 mmol) and 1-bromo-3-methoxypropane (48.0 mg, 0.31 mmol) were added, and the mixture was stirred at room temperature overnight. A saturated aqueous solution of ammonium chloride was added to the reaction mixture, followed by extraction with ethyl acetate. The organic layer was washed with a saturated aqueous solution of ammonium chloride twice and with a saturated saline solution once, then dried over sodium sulfate and filtered, and the filtrate was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography to obtain the title compound (105.0 mg, 96%). MS (ESI+) 522 (M+1, 100%)

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 1-Bromo-3-methoxypropane, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Sumitomo Dainippon Pharma Co., Ltd.; IKUMA Yohei; FUKUDA Nobuhisa; IWATA Masato; KIMURA Hidenori; SUZUKI Kuniko; EP2876105; (2015); A1;,
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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. 7252-83-7, name is 2-Bromo-1,1-dimethoxyethane, A new synthetic method of this compound is introduced below., category: ethers-buliding-blocks

[000398] A mixture of Compound 24A (10 g, 89 mmol), 2-bromo-l,l- dimethoxyethane(15 g, 89 mmol), K2C03 (18.4 g, 134 mmol), KI (100 mg) in DMF (100 mL) was stirred at reflux for 3 h, then cooled to rt, and filtered. The filtrate was added water (200 mL), extracted with ethyl acetate (100 mL x 2), washed with water (100 mL x 3), brine (100 mL x 1), dried over Na2S04, concentrated, and purified by silica gel column chromatography (ethyl acetate in petroleum ether, 10% v/v) to render Compound 24B (15 g, yield 85%>) as a colorless liquid. 1H-NMR (CDC13, 400 MHz) major characteristic peaks: delta (ppm) 3.46 (s, 6H), 3.96 (d, J= 5.2 Hz, 2H), 4.71 (t, J= 5.6 Hz, 1H), 6.90 (m, 2H), 7.26 (m, 2H).

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; BIOMARIN PHARMACEUTICAL INC.; WANG, Bing; CHU, Daniel; BRIDGES, Alexander, James; WO2015/42397; (2015); A1;,
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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. 437-83-2, name is 3-Fluoro-2-methoxyaniline, A new synthetic method of this compound is introduced below., Application In Synthesis of 3-Fluoro-2-methoxyaniline

General procedure: NaNO2 (12.0 g, 173 mmol, in 40 mL of water) solution was addeddropwise to the mixture of 3-fluoro-2-methoxyaniline (20.0 g, 158 mmol) in 200 mL of hydrobromic acid (47 %) and100 mL of water at -5 ~ 0 C and stirred for 1 hour. This solution was then added slowly to the suspension of CuBr(45.2 g, 315 mmol) in 50 mL of hydrobromic acid (47 %) at 0 C. The resulting mixture was stirred at 0 C for 1 hourthen warmed to 50 C and stirred for 1 hour. The reaction mixture was poured into ice water and extracted withether (2 X 500 mL). The combined organic layer was washed with brine, dried over anhydrous Na2SO4 and concentratedto give 1-bromo-3-fluoro-2-methoxybenzene.

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; Merck Sharp & Dohme Corp.; PASTERNAK, Alexander; BLIZZARD, Timothy; CHOBANIAN, Harry; DE JESUS, Reynalda; DING, Fa-Xiang; DONG, Shuzhi; GUDE, Candido; KIM, Dooseop; TANG, Haifeng; WALSH, Shawn; PIO, Barbara; JIANG, Jinlong; (128 pag.)EP2744499; (2016); B1;,
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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 111-95-5 as follows. category: ethers-buliding-blocks

1-fluoro-4-nitrobenzene (133 mg, 0.94 mmol), bis(2-methoxyethyl)amine (125 mg, 0.94 mmol) and potassium carbonate (143 mg, 1.04 mmol) were stirred in DMSO (2 mL) at 70 C. for 24 hours. The reaction mixture was poured into water, and the aqueous phase was extracted with ethyl acetate (2×25 mL). The combined organic extracts were washed with brine, dried over magnesium sulfate, filtered and concentrated to provide the title compound. MS (ESI+) m/e 255.1 (M+H)+.

According to the analysis of related databases, 111-95-5, the application of this compound in the production field has become more and more popular.

Reference:
Patent; ABBOTT LABORATORIES; US2012/220572; (2012); A1;,
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Application of 204452-91-5, 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. 204452-91-5, name is 7-(Dimethoxymethyl)-1,2,3,4-tetrahydro-1,8-naphthyridine, This compound has unique chemical properties. The synthetic route is as follows.

Compound 13c (0.73 g) was dissolved in trifluoroacetic acid (5 mL). The resulting mixture was allowed to stir at room temperature under argon for 1.5 hours. The mixture was concentrated. The residue was dissolved in methylene chloride and washed 2× with saturated sodium bicarbonate solution. The organic layer was dried over magnesium sulfate, filtered, and the filtrate was concentrated to obtain compound 13d.

The chemical industry reduces the impact on the environment during synthesis 7-(Dimethoxymethyl)-1,2,3,4-tetrahydro-1,8-naphthyridine. I believe this compound will play a more active role in future production and life.

Reference:
Patent; Flores, Christopher M.; Wade, Paul R.; US2011/319400; (2011); A1;,
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Related Products of 1535-73-5, The chemical industry reduces the impact on the environment during synthesis 1535-73-5, name is 3-Trifluoromethoxyaniline, I believe this compound will play a more active role in future production and life.

To a 100 mL one-necked flask was added compound Q6 (100 mg, 0.29 mmol), EDCI (113.1 mg, 0.59 mmol), HOBt (79.7 mg, 0.59 mmol), DMAP (144.2 mg, 1.18 mmol) and m-trifluoromethoxyaniline (10 mL) was added, and the mixture was stirred at room temperature for 12 h. The reaction was complete with TLC, and 20 mL of water was added. The aqueous phase was extracted with DCM (20 mL x 3) and the organic phases were combined. , Saturated NaCl solution (30 mL), dried over anhydrous NaSO4 and concentrated under reduced pressure and subjected to silica gel column chromatography (PE: EA = 2: 1) to give compound Q20 (120 mg white solid, 82percent).

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 3-Trifluoromethoxyaniline, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; East China Normal University; Qiu Wenwei; Yi Zhengfang; Yang Lianfang; Xing Yajing; Liu Mingyao; Xie Jia; (25 pag.)CN106928095; (2017); A;,
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Related Products of 452-08-4, 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. 452-08-4, name is 2-Bromo-4-fluoro-1-methoxybenzene, This compound has unique chemical properties. The synthetic route is as follows.

EXAMPLE 107 9-Fluoro-1,2-dihydro-2,2,4-trimethyl-5-coumarino[3,4-f]quinoline (Compound 207, structure 41 of Scheme XI, where R1 =H, R2 =F) 5-Fluoro-2-methoxyphenylboronic acid (structure 37 of Scheme XI; where R1 =H, R2 =F) In a 200-mL flask, a solution of 2-bromo-4-fluoroanisole (Aldrich: 4.00 mL, 30.8 mmol) in THF (50 mL) was cooled to -78 C. (CO2 /IPA). To this solution n-BuLi (Aldrich: 2.5M in hexanes; 12.4 mL, 31 mmol, 1.0 equivuiv) was added dropwise over a 30 min period. The reaction mixture was stirred at -78 C. for 60 min and treated with trimethylborate (Aldrich: 10.5 mL, 92.4 mmol, 3.0 equivuiv). The reaction mixture was allowed to slowly warm to rt, stirred overnight (12 h), and cooled to 0 C. (ice/H2 O). The solution was treated with 5% HCl until the pH reached 6. The reaction mixture was poured into sat’d NH4 C80 mL) and extracted with CH2 Cl2 (3*100 mL). The extracts were washed with sat’d NH4 Cl (1*80 mL), combined, dried (MgSO4), filtered through a pad of Celite, and concentrated to afford 4.90 g (94%) of a white semi-solid. Data for 5-fluoro-2-methoxyphenylboronic acid: 1 H NMR (400 MHz, acetone-d6): 7.47 (dd, J =8.8, 3.3, 1 H); 7.17 (m, 1 H); 7.05 (dd, J=9.0, 3.9, 1 H); 3.93 (s, 3 H).

The chemical industry reduces the impact on the environment during synthesis 2-Bromo-4-fluoro-1-methoxybenzene. I believe this compound will play a more active role in future production and life.

Reference:
Patent; Ligand Pharmaceuticals Incorporated; US5696133; (1997); A;,
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Electric Literature of 578-57-4, The chemical industry reduces the impact on the environment during synthesis 578-57-4, name is 1-Bromo-2-methoxybenzene, I believe this compound will play a more active role in future production and life.

A screw-cap vial equipped with a magnetic stir bar was charged with aryl halide (1 mmol), hexa-n-butylditin (0.5 mmol),palladium acetate (0.01 mmol) and tricyclohexylphosphine (0.02 mmol),followed by anhydrous cesium fluoride (1.5 mmol). The resulting mixture was manually homogenized with a magnet. A vial was transferred to a preheated oil bath (110 C). After 24 h, the mixture was cooled, dissolved in CH2Cl2-H2O mixture (1:1), the organic phase was separated, the solvent was evaporated in vacuo and the product was isolated by flash chromatography on a silica gel by elution with hexane-CH2Cl2 mixture.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 1-Bromo-2-methoxybenzene, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Gribanov, Pavel S.; Golenko, Yulia D.; Topchiy, Maxim A.; Philippova, Anna N.; Kirilenko, Nikita Yu.; Krivoshchapov, Nikolai V.; Sterligov, Grigorii K.; Asachenko, Andrey F.; Bermeshev, Maxim V.; Nechaev, Mikhail S.; Mendeleev Communications; vol. 28; 3; (2018); p. 323 – 325;,
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Application of 592-55-2, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 592-55-2 name is 1-Bromo-2-ethoxyethane, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

To a solution of 1,3-dithiane (1.02 g, 8.51 mmol) in THF (20 mL) under nitrogen at -3O0C was added n- BuLi in hexanes (4.90 mL, 1.6 M, 7.84 mmol) dropwise. The reaction was left for 2 hours at this temperature then was cooled to -780C when a solution of 2-bromoethyl ethyl ether (0.80 mL, 7.09 mmol) in THF (5 mL) was added dropwise. The reaction was then left to warm to room temperature and stir for 18 hours. The reaction was quenched with 10% citric acid (12 mL) and diluted with ethyl acetate (70 mL) . The aqueous phase was extracted with ethyl acetate (2 x 10 mL) . The combined organic phase was dried, filtered and the solvent removed in vacuo. This material (1.43 g) was dried onto silica gel then purified by flash chromatography, eluting with petroleum spirit/ethyl acetate (9:1) to afford, as a yellow oil, 2- (2-ethoxy-ethyl) – [1,3] dithiane (0.49 g, 36%). 1H NMR (CDCl3, 400 MHz) delta= 1.20 (t, J = 7.0 Hz, 3H), 1.80- 1.94 (m, IH), 2.02 (q, J= 6.4 Hz, 2H), 2.08-2.18 (m, IH), EPO 2.77-2.92 (m, 4H) , 3.49 (q, J = 7.2 Hz, 2H) , 3.58 (t, J” = 6.4 Hz, 2H) , 4.21 (t, J = 7.2 Hz, IH) .

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 1-Bromo-2-ethoxyethane, and friends who are interested can also refer to it.

Reference:
Patent; ZINGOTX PTY LTD; WO2006/125276; (2006); A1;,
Ether – Wikipedia,
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