Ethers-buliding-blocks

63057-72-7, name is 1-(Benzyloxy)-4-bromo-2-methoxybenzene, 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. name: 1-(Benzyloxy)-4-bromo-2-methoxybenzene

General procedure: n-BuLi (10.7 mmol, 1.6 M solution in hexanes) was slowly added at -78 C under N2 atm to a stirred solution of 1a (10.2 mmol) in THF (25 mL) then stirred for 30 min at the same temperature. Aldehyde 2a (11.3 mmol) in THF (25 mL) was added dropwise over a period of 5 min then the reaction mixture was stirred for 30 min at -78 C. The reaction mixture was allowed to warm to 0 C, quenched with saturated NH4Cl solution, and extracted into ethyl acetate. The organic layer was dried over anhydrous Na2SO4, and the solvents were evaporated. The crude compound was purified by column chromatography (35% EtOAc/hexane) to get alcohol 3a as off-white solid (yield 55%).

The synthetic route of 63057-72-7 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Pericherla, Kasiviswanadharaju; Shirazi, Amir Nasrolahi; Kameshwara Rao; Tiwari, Rakesh K.; Dasilva, Nicholas; McCaffrey, Kellen T.; Beni, Yousef A.; Gonzalez-Sarrias, Antonio; Seeram, Navindra P.; Parang, Keykavous; Kumar, Anil; Bioorganic and Medicinal Chemistry Letters; vol. 23; 19; (2013); p. 5329 – 5331;,
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Reference of 2050-46-6, 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. 2050-46-6, name is 1,2-Diethoxybenzene, This compound has unique chemical properties. The synthetic route is as follows.

EXAMPLE 7 Synthesis of 1,2-Diethoxy-4-(5′-hexynoyl)benzene STR23 A solution of 1,2-diethoxybenzene (1.66 g, 10.0 mmol) and 5-hexynoyl chloride (1.31 g, 1.00 eq) in methylene chloride (20 ml) is cooled to -60 C. Stannic chloride (2.66 g, 1.02 eq) is slowly added to the solution and the mixture is stirred at -60 C. for 10 minutes. The reaction mixture is quenched with 3N HCl and the layers are separated. The methylene chloride layer is extracted with 3N HCl, then extracted twice with water, and concentrated in vacuo. The yield of the crude 1,2-diethoxy-4-(5′-hexynoyl)benzene is 2.67 g.

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

Reference:
Patent; Norwich Eaton Pharmaceuticals, Inc.; US4982006; (1991); A;,
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Some common heterocyclic compound, 801282-00-8, name is 2-Fluoro-3-methoxyaniline, molecular formula is C7H8FNO, 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: 2-Fluoro-3-methoxyaniline

Aniline D3 (1.18 g, 8.36 MMOL) was combined with dimethylacetylene dicarboxylate A3 (1.45 mL, 10.0 MMOL) in methanol (25 mL). The reaction was REFLUXED for 2 hours before being concentrated to dryness. The crude material was purified by flash chromatography eluting with 9/1 (hexane/EtOAc) to give the Michael adduct D4 as a yellow oil, (1. 27 g, 54%)

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 801282-00-8, its application will become more common.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; BOEHRINGER INGELHEIM PHARMA GMBH & CO KG; WO2004/103996; (2004); A1;,
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These common heterocyclic compound, 1978-39-8, name is 5-Fluoro-2-methoxyaniline, 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. name: 5-Fluoro-2-methoxyaniline

Step (b): Preparation of 1-(4-fluoro-2-methoxyphenyl)piperazine Reaction of bis(2-chloroethyl)amine hydrochloride (0.11 mol) with 5-fluoro-2-methoxyaniline (0.01 mol) according to Step (c) of Example XII, provided 19.5 g (95% yield) of the piperazine intermediate used without further purification.

The synthetic route of 5-Fluoro-2-methoxyaniline has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Bristol-Myers Company; US4585773; (1986); A;,
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Reference of 36805-97-7, A common heterocyclic compound, 36805-97-7, name is 1,1-Di-tert-butoxy-N,N-dimethylmethanamine, molecular formula is C11H25NO2, 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.

To a solution of compound 36 (5.67 mmol) in anhydrous toluene (13 mL) at 110 0C was added Lambdaf,Lambda/-dimethylformamide di- tert-butylacetal (22.7 mmol) dropwise. The reaction mixture was refluxed for 1.5 hrs. The mixture was cooled down to room temperature, and washed sequentially with H2O (30 mL), sat NaHCO3 (30 ml), and brine (30 ml). Organics were dried and concentrated under reduced pressure to yield compound 37 as a yellow oil in 82% yield.

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; IDENIX PHARMACEUTICALS, INC.; PARSY, Christophe Claude; ALEXANDRE, Francois-Rene; LEROY, Frederic; CONVARD, Thierry; SURLERAUX, Dominique; WO2011/17389; (2011); A1;,
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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. 111-95-5, name is Bis(2-methoxyethyl)amine, This compound has unique chemical properties. The synthetic route is as follows., Product Details of 111-95-5

mixture of 4 3,6-diaminopyrazine-2,5-dicarboxylic acid (200 mg, 1.01 mmol), 5 bis-2-(methoxyethyl)amine (372 muL, 335.5 mg, 2.52 mmol), HOBt.H2O (459 mg, 3.00 mmol), and 6 EDC.HCl (575 mg, 3.00 mmol) were stirred together in 7 DMF (20 mL) for 1 h at room temperature. The mixture was concentrated to dryness and the residue was partitioned with EtOAc and water. The layers were separated and the 8 EtOAc solution was washed with saturated NaHCO3 and brine. The solution was dried over anhydrous Na2SO4, filtered and concentrated. Purification by radial flash chromatography (SiO2, 10/1 CHCl3-MeOH) afforded 228.7 mg (53% yield) of Example 1 as an orange foam: 1H NMR (300 MHz, CDCl3), delta 4.92 (s, 4H), 3.76 (apparent t, J=5.4 Hz, 4H), 3.70 (apparent t, J=5.6 Hz, 4H), 3.64 (apparent t, J=5.4 Hz, 4H), 3.565 (apparent t, J=5.4 Hz), 3.67 (s, 6H), 3.28 (s, 6H). 13C NMR (75 MHz, CDCl3) delta 167.6 (s), 145.6 (s), 131.0 (s), 72.0 (t), 70.8 (t), 59.2 (q), 49.7 (t), 47.1 (t). LCMS (5-95% gradient acetonitrile in 0.1% TFA over 10 min), single peak retention time=3.14 min on 30 mm column, (M+H)+=429. UV/vis (100 muM in PBS) lambdaabs=394 nm. Fluorescence (100 nm) lambdaex=394 nm lambdaem=550 nm.

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 111-95-5.

Reference:
Patent; MediBeacon Inc.; Debreczeny, Martin P.; Rajagopalan, Raghavan; Dorshow, Richard B.; Neumann, William L.; Rogers, Thomas E.; (54 pag.)US2019/125901; (2019); 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. 1535-73-5, name is 3-Trifluoromethoxyaniline, A new synthetic method of this compound is introduced below., Recommanded Product: 3-Trifluoromethoxyaniline

General procedure: Compounds 2-amino-5-methoxy-4-substitutedbenzonitriles (4a?4d) (10.0mmol) in 10 N hydrochloric acid (30.0mL) were cooled to 0 °C and diazotized with sodium nitrite (0.71g) in water (10.0mL). The diazonium solution was neutralized with excess of sodium acetate trihydrate and stirred for 2 h at 0 °C with the corresponding substituted anilines (10.0 mmol). The solution was kept overnight at 4 °C, filtered, and washed with water. The crude products were then purified by recrystallization with ethyl acetate to obtain intermediate (5a?5z). Compounds (5a?5z) were boiled in 70percent ethanol (25.0 mL) for 1h, and then evaporated under reduced pressure to dryness. Acetic acid (10.0 mL) was added and the solution was refluxed for 2 h, cooled, poured into water (100mL), filtered and dried. The crude products thus obtained were recrystallized from ethanol to give the final compounds 7-alkoxyl-6-methoxy-4-substituted-1,2,3-benzotriazines (6a?6z).

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:
Article; Zhao, Xing-Wang; Liu, Dan; Luan, Sheng-Lin; Hu, Guo-Dong; Lv, Jin-Ling; Jing, Yong-Kui; Zhao, Lin-Xiang; Bioorganic and Medicinal Chemistry; vol. 21; 24; (2013); p. 7807 – 7815;,
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Reference of 7025-06-1, These common heterocyclic compound, 7025-06-1, name is 1-Bromo-2-phenoxybenzene, 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.

37A. (1-(2-Phenoxyphenyl)-2-oxabicyclo[2.2.2]octan-4-yl)methyl 4-methylbenzenesulfonate To a -78° C. solution of 1-bromo-2-phenoxybenzene (283 mg, 1.136 mmol) in anhydrous THF (5 mL) was added dropwise n-BuLi (545 muL of a 2.5 M solution in hexane, 1.363 mmol). The reaction was stirred at -78° C. for 0.5 h, after which a solution of 4-oxocyclohexane-1,1-diyl)bis(methylene)bis(4-methylbenzenesulfonate (1E; 530 mg, 1.14 mmol) in THF (4 mL) was added dropwise. The reaction mixture was slowly warmed to rt and stirred at rt for 2 h. Analytical HPLC showed the reaction was complete. Powdered NaOH (91 mg, 2.27 mmol) was added and the mixture was stirred under reflux for 18 h. The reaction was cooled to rt, diluted with water and extracted with EtOAc (2*). The organic layer was dried (MgSO4) and concentrated in vacuo. The crude oil purified by flash chromatography (SiO2) using a gradient from 0percent to 40percent EtOAc/hexane (15 min) to give the title compound (230 mg, 0.495 mmol, 44percent yield) as a white solid. LCMS [M+H]+=465.1; 1H NMR (CDCl3) delta: 7.85-7.77 (m, 2H), 7.76-7.69 (dd, J=7.9, 1.9 Hz, 1H), 7.41-7.30 (m, 4H), 7.20-7.14 (td, J=7.6, 1.9 Hz, 1H), 7.14-7.06 (m, 2H), 6.98-6.92 (dd, J=7.6, 1.5 Hz, 2H), 6.83-6.76 (dd, J=8.1, 1.4 Hz, 1H), 3.87 (s, 2H), 3.75 (s, 2H), 2.59-2.50 (ddd, J=13.5, 11.3, 4.1 Hz, 2H), 2.48 (s, 3H), 1.98-1.87 (m, 2H), 1.75-1.64 (td, J=11.3, 10.8, 2.7 Hz, 2H), 1.60-1.51 (m, 2H).

The synthetic route of 7025-06-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Zhang, Hao; Cheng, Peter T.W.; Chen, Sean; Tao, Shiwei; Wu, Shung C.; Negash, Lidet A.; US2014/275173; (2014); A1;,
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Related Products of 50868-73-0, 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. 50868-73-0 name is 2-Methoxy-6-methylaniline, 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.

b) Preparation of intermediate 4; 3.3 g of intermediate 3 (24.1 mmoles) were dissolved in acetic acid (15 ml). Iodine monochloride (5.87g, 36 mmoles) was added. The mixture was stirred at room temperature for 30 minutes and was evaporated. The residue was suspended in an aqueous solution of Na2CC>3 and was extracted with dichloromethane. After drying the dichloromethane extract on MgSCU, it was evaporated and the residue was purified on a silica gel column using dichloromethane as eluent. Yield : 0.758g (13%) of intermediate 4 (CI-MS : 264 [M+H]+).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2-Methoxy-6-methylaniline, and friends who are interested can also refer to it.

Reference:
Patent; JANSSEN PHARMACEUTICA N.V.; ARTS, Frank, Xavier, Jozef, Herwig; WO2006/15985; (2006); A1;,
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Application of 767-91-9, The chemical industry reduces the impact on the environment during synthesis 767-91-9, name is 2′-Methoxyphenyl acetylene, I believe this compound will play a more active role in future production and life.

General procedure: 1a-1e (0.5mmol) and alkynyl reagent 2a-2o (0.60mmol), Pd(OAc)2 (0.025mmol, 0.0056g) and dppf (0.025mmol, 0.0138g), piperazine (1mmol, 0.0861g) in THF (2mL) was added to a 20mL silica tubes. The autoclave was closed, flushed three times with CO, pressurized with 50psi of CO, and heated at 50C for 24h. After the completion of the reaction, the reactor was cooled down to room temperature, the crude products were extracted with ethyl acetate and water, and the organic layer were purified by column chromatography on silica gel using dichloromethane or ethyl acetate/petroleum ether as eluent. All products 3aa-3ea were identified by comparing their spectral data with those of authentic samples.

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′-Methoxyphenyl acetylene, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Xu, Shan; Sun, Huaming; Zhuang, Mengyuan; Zheng, Shaohua; Jian, Yajun; Zhang, Weiqiang; Gao, Ziwei; Molecular catalysis; vol. 452; (2018); p. 264 – 270;,
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