Ethers-buliding-blocks

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. 10541-78-3, name is 2-Methoxy-N-methylaniline, A new synthetic method of this compound is introduced below., HPLC of Formula: C8H11NO

General procedure: A mixture of secondary amine 1 (200 mg, 1 equiv), polyformaldehyde 2 (1.5 equiv) and the activated alkene 3 (1.1 equiv) was dissolved in acetonitrile (2 mL). The solution was stirred at room temperature for 3 days until the starting secondary amine 1 was no longer detected by TLC (revealed with an ethanolic solution of vanillin-sulfuric acid or iodine). After the excess of solvent was removed under reduced pressure, the oily material obtained was purified by column chromatography on silica gel (70-230 mesh), using CHCl3:MeOH mixtures of (30:1, 20:1 or 15:1) as eluent.

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; Abonia, Rodrigo; Castillo, Juan C.; Garay, Alexander; Insuasty, Braulio; Quiroga, Jairo; Nogueras, Manuel; Cobo, Justo; D’Vries, Richard; Tetrahedron Letters; vol. 58; 15; (2017); p. 1490 – 1494;,
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Electric Literature of 1462-37-9, The chemical industry reduces the impact on the environment during synthesis 1462-37-9, name is ((2-Bromoethoxy)methyl)benzene, I believe this compound will play a more active role in future production and life.

PREPARATIONSPreparation 15-(4-Chlorophenyl)-1-(2,4-dichlorophenyl)-2-(3-methanesulphonylaminopropyl)-1H-pyrrole-3-carboxylic acid1A) Methyl ester of 6-benzyloxy-3-oxohexanoic acid (synthesis carried out based on: Angewandte Chemie (Int. Ed) 38(9), 1999, 1263-1266).9.64 g of NaH are suspended in 300 ml of anhydrous THF. The suspension is cooled to 0° C. 20 g of methyl acetoacetate are added dropwise and the mixture is kept stirred for 45 minutes. The solution is then cooled to -20° C., and 96 ml of a 2.5 molar solution of n-BuLi in hexane are added. After stirring for 15 minutes, 51.8 g of benzyl 2-bromoethyl ether are added and the temperature is allowed to rise to 0° C. The solution is then neutralized with 200 ml of 1N HCl. The solution is diluted with 500 ml of ether, washed with H2O, dried over MgSO4, and evaporated. 50 g of an oil are obtained which, after chromatography (eluent cyclohexane/ethyl acetate), give 22.6 g of a colourless oil.

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-Bromoethoxy)methyl)benzene, other downstream synthetic routes, hurry up and to see.

Reference:
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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. 13101-88-7, name is 6-Methoxynaphthalen-2-amine, A new synthetic method of this compound is introduced below., Quality Control of 6-Methoxynaphthalen-2-amine

Weigh compound 6-methoxy-2-naphthyl-amine (7g, 0.04044mol), triethylamine (6g, 0.06067mol) in 100mL reaction flask, a solution of methylene chloride was added to the reaction flask of 15mL at 0 the reaction conditions under 15min; dropwise added methanesulfonyl chloride (7g, 0.06067mol), under reaction conditions 0 30min, TLC plate monitor, the reaction was complete, adding an appropriate amount of aqueous sodium hydroxide solution, extracted with ethyl acetate and saturated brine dried over anhydrous sodium sulfate, and spin dry, column chromatography (PE: EA = 2: 1), give a purple solid 5.6g, yield 55.2%.

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; East China University of Science and Technology; Li, Hongling; Jiang, Hualiang; Xu, Yufang; Li, Jia; Zhao, Zhenjang; Li, Jingya; Xu, Hongling; Li, Shiliang; (64 pag.)CN105566276; (2016); A;,
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366-99-4, name is 3-Fluoro-4-methoxyaniline, 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. Product Details of 366-99-4

Reference Example 13; N- (5-Fluoro-4-methoxy-2-nitrophenyl) acetamide; Acetic anhydride (5 ml) was added to 3-fluoro-4- methoxyaniline (5.0 g), and the mixture was stirred for 30 minutes. The reaction mixture was cooled to room temperature, and nitric acid (2.3 ml) was added dropwise thereto. The mixture was stirred for 30 minutes, and water was added thereto. The resulting precipitate was collected and washed with water to obtain the title compound as crystals (5.7 g, 71percent). H-NMR (300 MHz, CDC13) 5 (ppm): 2.29 (3H, s), 3.94 (3H, s), 7.80 (1H, d, J=8. 4Hz), 8.66 (1H, d, J=10.5Hz), 10.39 (1H, brs).

The synthetic route of 366-99-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; WO2005/82879; (2005); A1;,
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Adding a certain compound to certain chemical reactions, such as: 710-18-9, name is 1-Methoxy-4-(trifluoromethoxy)benzene, 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 710-18-9, Recommanded Product: 1-Methoxy-4-(trifluoromethoxy)benzene

Preparation 34 2-Methoxy-5-trifluoromethoxybenzoyl chloride Combine 2-methoxy-5-trifluoromethoxybenzene (1.0 g, 5.2 mmol) and trifluoroacetic acid (200 mL). Add slowly portionwise hexamethylenetetraamine (26 g, 185.7 mmol). Heat at 60 C. After 24 hours, cool to ambient temperature and pour the reaction mixture into a 2 M aqueous solution of sulfuric acid (500 mL). Cool and extract ten times with diethyl ether. Dry the combined organic layers over Na2SO4, filter, and evaporate in vacuo to give a residue. Chromatograph the residue on silica gel eluding with 1/4 ethyl acetate/hexane to give 2-methoxy-5-trifluoromethoxybenzaldehyde.

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; Aventis Pharmaceuticals Inc.; US6194406; (2001); B1;,
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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. 74654-07-2, name is 2-(2-(2-Methoxyethoxy)ethoxy)ethanamine belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. SDS of cas: 74654-07-2

Example 58A tert-Butyl [(trans-4-{[(2S)-3-[4′-({2-[2-(2-methoxyethoxy)ethoxy]ethyl}carbamoyl)-2′-methylbiphenyl-3-yl]-1-oxo-1-{[4-(1H-tetrazol-5-yl)phenyl]amino}propan-2-yl]carbamoyl}cyclohexyl)methyl]carbamate 3′-[(2S)-2-{[(trans-4-{[(tert-Butoxycarbonyl)amino]methyl}cyclohexyl)carbonyl]amino}-3-oxo-3-{[4-(1H-tetrazol-5-yl)phenyl]amino}propyl]-2-methylbiphenyl-4-carboxylic acid and 2-[2-(2-methoxyethoxy)ethoxy]ethanamine (29 mg, 0.17 mmol) were dissolved in tetrahydrofuran (4 ml), N-[(dimethylamino)(3H-[1,2,3]triazolo[4,5-b]pyridin-3-yloxy)methylidene]-N-methylmethanaminium hexafluorophosphate (67 mg, 0.17 mmol) and N,N-diisopropylethylamine (23 mg, 0.17 mmol) were added and the mixture was stirred at RT overnight. Subsequently, the mixture was concentrated and the residue was purified chromatographically by HPLC (Method 10). This gave 53 mg (44% of theory) of the title compound. LC-MS (Method 4): Rt=1.17 min; MS (ESIpos): m/z=827.6 [M+H]+.

The synthetic route of 74654-07-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Bayer Pharma Aktiengesellschaft; ROeHN, Ulrike; ELLERMANN, Manuel; STRASSBURGER, Julia; WENDT, Astrid; ROeHRIG, Susanne; WEBSTER, Robert Alan; SCHMIDT, Martina Victoria; TERSTEEGEN, Adrian; BEYER, Kristin; SCHAeFER, Martina; BUCHMUeLLER, Anja; GERDES, Christoph; SPERZEL, Michael; SANDMANN, Steffen; HEITMEIER, Stefan; HILLISCH, Alexander; ACKERSTAFF, Jens; TERJUNG, Carsten; (163 pag.)US2016/244437; (2016); A1;,
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Reference of 24878-25-9, These common heterocyclic compound, 24878-25-9, name is 2,2′-Oxydianiline, 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.

L. Nicotinic acid acyl azide and bis(2-aminophenyl) ether were synthesized according to previous literatures [24-26], respectively. A solution of nicotinic acid acyl azide (1.04?g, 7.0?mmol) in toluene (30?mL) was refluxed under nitrogen for 1.5?h, and bis(2-aminophenyl) ether (0.60?g, 3.0?mmol) in acetonitrile (30?mL) was added dropwise. The mixture was stirred for another 1.5?h and cooled to room temperature. The precipitate that formed was collected by filtration and purified by recrystallization from CH3OH/DMF(V: V?=?2:1) to give a white solid. Yield: 1.07?g, 81%; mp: 285???286?C. 1H NMR (DMSO-d6, 400?MHz): delta 6.84 (d, 2H, J?=?7.6?Hz, Ar-H), 7.02 (t, 2H, J?=?5.2?Hz, Ar-H), 7.18 (t, 2H, J?=?5.6?Hz, Ar-H), 7.36 (dd, 2H, J?=?2.8?Hz, Ar-H), 7.99 (m, 2H, Py-H), 8.23 (d, J?=?2.8?Hz, 2H, Py-H), 8.35 (d, J?=?6.8?Hz, 2H, Py-H), 8.61 (s, 2H, Py-H), 8.75 (s, 2H, CONH), 9.52 (s, 2H, CONH). 13C NMR (DMSO-d6, 400?MHz): delta 152.98, 145.76, 143.53, 140.33, 136.81, 131.60, 125.47, 124.64, 124.15, 123.20, 120.23, 118.38. Anal. Calcd(%) for C24H20N6O3: C 65.45, H 4.58, N 19.08; found(%): C 65.49, H 4.62, N 19.03. FT-IR (KBr pellet, nu/cm-1): 3344 (m, NH), 1715 (s, CO), 1599 (s, NH). ESI-MS: m/z?=?441 [M+H]+, 463 [M+Na]+.

The synthetic route of 24878-25-9 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Huang, Chao; Yi, Xian-Mei; Chen, Dong-Mei; Zhu, Bi-Xue; Inorganica Chimica Acta; vol. 476; (2018); p. 123 – 128;,
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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. 54149-17-6, name is 1-Bromo-2-(2-methoxyethoxy)ethane belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Safety of 1-Bromo-2-(2-methoxyethoxy)ethane

Example 9. 6-{4-[4-(5-Chloro-1H-indole-2-sulphonyl)-piperazine-1-carbonyl]-phenyl}-2-[2-(2-methoxv-ethoxv)-ethvll-2H-pvridazin-3-one. 6- [4- ( {4- [ (5-Chloro-lH-indol-2-yl) sulphonyl] piperazin-1-yl} carbonyl) phenyl]- pyridazin-3-ol (see WO 99/57113,0. 054 gram, 0.11 mmol), 0. 016 gram of anhydrous potassium carbonate (0.11 mmol, 1.0 eq. ) and 0.02 gram of 1-bromo-2-(2-methoxy- ethoxy) ethane (0.11 mmol, 1.0 eq. ) were mixed in 1.5 mL of dry N, N-dimethylformamide. The mixture was treated with microwave at 150 C for 1 hour. Without any work-up, purification was performed on preparative HPLC, which gave 0.023 gram of 6-{4-[4-(5-chloro-1H-indole-2-sulphonyl)-piperazine-1-carbonyl]-phenyl}-2-[2-(2- methoxy-ethoxy)-ethyl]-2H-pyridazin-3-one (yield 36 %).

The synthetic route of 54149-17-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ASTRAZENECA AB; WO2005/65688; (2005); 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. 20781-20-8, name is (2,4-Dimethoxyphenyl)methanamine, A new synthetic method of this compound is introduced below., Application In Synthesis of (2,4-Dimethoxyphenyl)methanamine

Step 1: N-(2,4-dimethoxybenzyl)-4-iodo-5-methylpyridin-2-amine A solution of 2-fluoro-4-iodo-5-methylpyridine (85 g, 340 mmol) in 1-(2,4-dimethoxyphenyl)methanamine (270 mL, 1.68 mol) was allowed to stir at 110 C. overnight. The reaction mixture was allowed to cool to rt and diluted with EtOAc. A precipitate formed and was filtered and then washed with EtOAc. The solid was purified further by column chromatography to give N-(2,4-dimethoxybenzyl)-4-iodo-5-methylpyridin-2-amine (138 g, 50%).

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; MILLENNIUM PHARMACEUTICALS, INC.; Chau, Ryan W.; Cullis, Courtney A.; Duffey, Matthew O.; Gipson, Krista E.; Hu, Yongbo; Li, Gang; Sintchak, Michael D.; Vos, Tricia J.; US2013/165464; (2013); A1;,
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Related Products of 41789-95-1, 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. 41789-95-1, name is 1-(3-Methoxyphenyl)-N-methylmethanamine, This compound has unique chemical properties. The synthetic route is as follows.

General procedure: In a typical reaction, the Wang resin (3, 2.0 g, 1.2 mmol/g, 100-200 mesh and 1% DVB) was swollen in CH2Cl2 (20 mL). 5-Bromopentanoic acid (4, 2.15 g, 12.0 mmol) and DIC (1.51 g, 12.0 mmol) were dissolved in the minimum volume of CH2Cl2/DMF (1:1) required for complete dissolution. The activated scaffold solution was added to the resin, followed by the addition of slurry of DMAP (4 mg, 10 mol %) in CH2Cl2 (0.5 mL). The reaction vessel was shaken at room temperature for 48 h. The resin was washed with CH2Cl2 (2 × 25 mL), DMF (2 × 25 mL), MeOH (2 × 25 mL) again followed by DMF (2 × 25 mL), CH2Cl2 (3 × 25 mL), and then further dried in vacuo overnight to afford the resin-bound 5-bromopentanoic acid in good yield (2.73 g, 81%). Next, to the resin-bound 5-bromopentanoic acid (2.70 g, 3.9 mmol), swelled in DMF (10 mL), K2CO3 (2.13 g, 15.6 mmol) was added at ambient temperature, and the reaction suspension was stirred for another 30 min. Later, methyl 2-azido-4-hydroxy-5-methoxybenzoate (5, 1.73 g, 7.8 mmol) was added to the resin. The reaction suspension was stirred at 50 C for 48 h. The solid-support was washed with water (3 × 20 mL), CH2Cl2 (2 × 20 mL), MeOH (3 × 15 mL), and then dried in vacuo to afford the resin-bound precursor 6a (3.07 g, 75%). To a suspension of this resin-bound ester in 1,4-dioxane (10 mL) was added 1 N NaOH solution (2.5 mL) and the reaction mixture was heated at 80 C for 12 h. On cooling, the resin was filtered and rinsed with water (2 × 15 mL), water/dioxane (1:9, 2 × 15 mL), MeOH (2 × 15 mL), CH2Cl2 (2 × 15 mL), Et2O (2 × 15 mL) and dried in vacuo to afford the resin-bound acid. Next, to the resin-bound 2-azido-4-(5-ethoxy-5-oxopentyloxy)-benzoic acid (2.81 g, 2.6 mmol) swelled in CH2Cl2 (10 mL), EDCI (0.99 g, 5.2 mmol), HOBt (0.71 g, 5.2 mmol) and l-proline methyl ester (7a, 0.84 g, 6.5 mmol) were added. This reaction mixture was stirred for 12 h at room temperature, then resin was filtered and washed with H2O (3 × 10 mL), CH2Cl2 (2 × 10 mL), MeOH (3 × 10 mL) and Et2O (3 × 10 mL) to afford the resin bound methyl 5-(5-azido-4-(2-formylpyrrolidine-1-carbonyl)-2-methoxyphenoxy) pentanoate 8a in good yield (2.89 g, 71%). To a suspension of this resin (0.110 g, 1.2 mmol) in CH2Cl2 (5 mL), AlCl3 (0.79 g, 6 mmol), NaI (0.22 g, 2 mmol) and 2-(4-methoxyphenyl)ethanamine (9a, 0.35 mL, 2.4 mmol) were added at room temperature and stirred for 6 h. Aqueous 1 M potassium carbonate solution (2 mL) was added to the reaction mixture followed by excess of NaI, quenched with saturated sodium thiosulfate (Na2S2O3), and then resin was separated by simple filtration and washed with CH2Cl2 (10 mL). The removal of excess amine impurities from the final resin cleaved crude product was achieved by solid-supported liquid-liquid extraction (SLE) with a fritted vessel previously packed with ?Varian?s Hydromatrix?. The crude compound 1a which contains excess of amine was passed through the Hydromatrix support into a collection plate below, while the amine salts were retained by the solid matrix, resulting in the effective removal of the amine impurities. This filtrate and washings were evaporated to dryness under reduced pressure. Finally, it was further purified by the preparative thin layer chromatography by using ethyl acetate:methanol (98:2) as eluent to afford the corresponding compound 1a in high purity (brown solid, 0.013 g, 56%).

The chemical industry reduces the impact on the environment during synthesis 1-(3-Methoxyphenyl)-N-methylmethanamine. I believe this compound will play a more active role in future production and life.

Reference:
Article; Kamal, Ahmed; Prabhakar; Shankaraiah, Nagula; Markandeya, Nagula; Venkat Reddy; Srinivasulu, Vunnam; Sathish, Manda; Tetrahedron Letters; vol. 54; 33; (2013); p. 4435 – 4441;,
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