Category: ethers-buliding-blocks

Electric Literature of 37466-89-0, 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. 37466-89-0, name is 3-Methoxybenzene-1,2-diamine belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

3-Methoxybenzene-1,2-diamine dihydrochloride (Example 54(a)) was partitioned between 10% aq. Na2CO3 and CH2Cl2. The aqueous layer was extracted with CH2Cl2 (2¡Á). The combined organic extracts were dried over Na2SO4, filtered and evaporated to yield 3-methoxybenzene-1,2-diamine. A mixture of the diamine (912 mg, 6.6 mmol) and diethyl oxalate (9.0 mL, 66 mmol, Aldrich) was heated at 185 C. for 18 h. The reaction mixture was left to reach room temperature and the solid precipitate was filtered. The filter cake was washed with EtOH and dried in vacuo to give the title compound. MS (ESI, pos. ion.) m/z: 191 (M+1).

The synthetic route of 3-Methoxybenzene-1,2-diamine has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Wang, Hui-Ling; Balan, Chenera; Doherty, Elizabeth M.; Falsey, James R.; Gore, Vijay Keshav; Katon, Jodie; Norman, Mark H.; US2005/176726; (2005); A1;,
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Electric Literature of 13940-96-0, These common heterocyclic compound, 13940-96-0, name is 4-Phenoxybenzene-1,2-diamine, 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.

For preparing the 3,4-diamino-diphenyl ether used as starting material, 172.5 g of 5-chloro-2-nitro-aniline were heated for 4 hours under reflux in 500 ml of dimethylformamide with 94 g of phenol in the presence of 150 g of anhydrous potassium carbonate. After cooling, the reaction mixture was diluted with 1000 ml of water, the 3-amino-4-nitro-diphenyl ether that had precipitated was filtered off with suction and purified by recrystallization from isopropanol. Yield: 110 g; melting point: 142C. 103 g Of the 3-amino-4-nitro-diphenyl ether so obtained were hydrogenated in 800 ml of dimethylformamide with Raney nickel under a pressure of 100 atmospheres gauge at room temperature, the catalyst was then removed by filtration and the solution was evaporated under reduced pressure. The 3,4-diamino-diphenyl ether that had formed was obtained in the form of a sirupy mass which was dissolved in ethanol and used in the reaction as described above.

The synthetic route of 13940-96-0 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Hoechst Aktiengesellschaft; US3954791; (1976); A;,
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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. 1462-37-9, name is ((2-Bromoethoxy)methyl)benzene belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Safety of ((2-Bromoethoxy)methyl)benzene

0.24 g (10 mmo 1) sodium hydride and 15 ml of N, N-dimethylformamide were added to a 50 ml round bottom flask,Stirred at room temperature for 10 minutes,Followed by the addition of 2.5 g (lOmmol) of compound 2 and 1 O of 2-octyloxyethyl bromide,And the reaction was carried out by thin layer chromatography to the end of the reaction. The reaction solution was then poured into 500 ml of ice water and extracted three times with 100 ml of ethyl acetate. The organic phase was combined and the solvent was evaporated. The residue was purified by WATFif = 100: 1 ) To give Compound 3 (2.7 g, 71% yield)

The synthetic route of 1462-37-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Guangxi Normal University; Chen Zhenfeng; Liang Hong; Liu Yancheng; Li Liangping; Lu Xing; (13 pag.)CN106478675; (2017); A;,
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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. 4393-09-3, name is (2,3-Dimethoxyphenyl)methanamine, This compound has unique chemical properties. The synthetic route is as follows., Quality Control of (2,3-Dimethoxyphenyl)methanamine

By proceeding in a similar manner to Example 2, but using the appropriately substituted amines in step 2, there were prepared Compounds E to BU depicted in Table 1. MOLECULAR FORMULA: C31H36N4O8. HPLC: RT = 7.6 minutes, area of main peak as a percentage of the total sample = 79% (gradient elution using a mixture of acetonitrile and water 3:7 to 17:3 v/v). MS: 593 [MH]+. MS: 591 [MH]-.

According to the analysis of related databases, 4393-09-3, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Aventis Pharma Limited; US6352977; (2002); B1;,
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Application of 41365-75-7, A common heterocyclic compound, 41365-75-7, name is 1-Amino-3,3-diethoxypropane, molecular formula is C7H17NO2, 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.

5-bromo-4-chloro-2-(methylsulfanyl)pyrimidine (9.2 g, 38.4 mmol), K2003 (6.9 g, 49.9 mmol) and 3,3-diethoxypropan-1-amine (5.65 g, 38.4 mmol) were added to DMF (80 mL). The reaction was stirred for 3 h then quenched with H20 (100 mL), extracted with diethyl ether(2 x 75 mL) and dried over MgSO4. After filtration the filtrate was concentrated under reduced pressure to afford 5-bromo-N-(3,3-diethoxypropyl)-2-(methylsulfanyl)pyrimidin-4-amine 11 a (13.2 g, 98%) as a yellow gum. LC-MS (Method A) 351.9 [M+H] RT 3.32 mm.

The synthetic route of 41365-75-7 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; REDX PHARMA PLC; COOPER, Ian; LYONS, Amanda; (102 pag.)WO2017/137743; (2017); A1;,
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Electric Literature of 645-36-3, 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. 645-36-3, name is 2,2-Diethoxyethanamine, This compound has unique chemical properties. The synthetic route is as follows.

Synthesis of rac-(5aR,6S,7R,8R,8aS)-5a-(4-bromophenyl)-3-chloro-N-(2,2-diethoxyethyl)-8,8a-dihydroxy-6-phenyl-5a,7,8,8a-tetrahydro-6H-cyclopenta[4,5]furo[3,2-b]pyridine-7-carboxamide (3) To a solution of rac-(5aR,6S,7R,8R,8aS)-5a-(4-bromophenyl)-3-chloro-8,8a-dihydroxy-6-phenyl-5a,7,8,8a-tetrahydro-6H-cyclopenta[4,5]furo[3,2-b]pyridine-7-carboxylic acid (1, 1.4 g, 2.7 mmol) in dichloromethane (20 mL), 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (1.6 g, 8.3 mmol), 1-hydroxybenzotriazole (1.13 g, 8.3 mmol) and N,N-diisopropylethylamine (2.88 mL, 16.0 mmol) were added at 0 C. and stirred the mixture for 5 min. 2,2-diethoxyethan-1-amine (2, 2.35 g, 13.0 mmol) was then added at same temperature and the reaction was stirred at 35 C. for 16 h. After completion, reaction mass was diluted with dichloromethane and washed with cold water. The organic layer was separated and dried over anhydrous sodium sulphate, filtered and concentrated to give crude. The crude was purified by Combi-flash (12 g, RediSep column) using 2% methanol in dichloromethane as eluent. The desired fractions were concentrated under reduced pressure to afford rac-(5aR,6S,7R,8R,8aS)-5a-(4-bromophenyl)-3-chloro-N-(2,2-diethoxyethyl)-8,8a-dihydroxy-6-phenyl-5a,7,8,8a-tetrahydro-6H-cyclopenta[4,5]furo[3,2-b]pyridine-7-carboxamide (3) as light brown oil. Yield: 1.1 g, 64%; MS (ESI) m/z 617.12[M+1]+.

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

Reference:
Patent; eFFECTOR Therapeutics, Inc.; ERNST, Justin T.; REICH, Siegfried H.; SPRENGELER, Paul A.; TRAN, Chinh Viet; PACKARD, Garrick Kenneth; XIANG, Alan X.; NILEWSKI, Christian; MICHELS, Theo; (478 pag.)US2017/145026; (2017); A1;,
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Application of 91-16-7, 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. 91-16-7 name is 1,2-Dimethoxybenzene, 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.

Under nitrogen atmosphere, to a suspension of 4-chlorobutyrylchloride (4.0 mL, 36.1 mmol), 1,2-dimethoxybenzene (23.1 mL,180.9 mmol) in dichloromethane (60 mL) was added portionwisealuminum chloride (5.8 g, 43.4 mmol) at 0 C. The resulting suspensionwas stirred for 3 h at 25 C. The reaction was quenched bypouring the reaction mixture into an ice/water mixture. Theresulting aqueous solution was extracted with dichloromethane(3), and the organic layer was washed with water and brine, driedwith Na2SO4, and concentrated in vacuo. The crude residue wasthen purified by chromatography on silica gel (gradient of EtOAc inpetroleum ether) to afford the title compound 26 as a pale yellowsolid. (Yield 7.9 g, 90%). Rf 0.4 (EtOAc/petroleum ether 1:4).1HNMR (300 MHz, CDCl3, d): 2.13e2.22 (m, 2H), 3.09 (t, 2H, J 6.9 Hz),3.63 (t, 2H, J 6.0 Hz), 3.89 (s, 3H), 3.91 (s, 3H), 6.85 (d, 1H,J 8.4 Hz), 7.49 (d, 1H, J 2.1 Hz), 7.57 (dd, 1H, J 8.4 Hz, J 1.8 Hz).13C NMR (75 MHz, CDCl3, d): 27.1, 34.8, 44.8, 56.0, 56.7, 110.0, 110.6,122.7, 130.0, 149.0, 153.3, 197.5. HRMS (ESI): m/z calcd forC12H16O3Cl [MH]: 243.0788; found 243.0787.

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

Reference:
Article; Azzouz, Rabah; Peauger, Ludovic; Gembus, Vincent; ?in?a?, Mihaela-Liliana; Papamicael, Cyril; Levacher, Vincent; Sopkova-de Oliveira Santos, Jana; European Journal of Medicinal Chemistry; vol. 145; (2018); p. 165 – 190;,
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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 954235-83-7 as follows. HPLC of Formula: C7H4BrF3O

A mixture of l-bromo-2-(difluoromethoxy)-4-fluorobenzene (intermediate 176a, 150 mg), (4-(2- (4-(ethylsulfonyI)phenyl)acetamido)-2,6-difluorophenyl)boronic acid (intermediate 122a, 404 mg), tri-ierf-butylphosphine, tetrafluoroboric acid salt (217 mg), Pd2(dba)j (171 mg) and sodium carbonate solution (2 M, 1.245 mL) in 1,4-dioxane (4.5 mL) was sealed in a vessel and heated in the microwave at 100C for 45 mins. The reaction mixture was filtered through celite and silica gel. The filtrate was concentrated under reduced pressure and the residue was purified by MDAP to afford N-(2′- (difluoromethoxy) -2,4′,6-trifiuoro-[ 1 , 1 ‘-biphenyl] -4-yl) -2-(4-(ethylsulfonyl)phenyl) acetamide ( 133 mg) as a yellow solid. ?-NMR (400 MHz, DMSO-Patent; GLAXO GROUP LIMITED; WANG, Yonghui; CAI, Wei; LIU, Qian; MENG, Qinghua; CHENG, Yaobang; YANG, Ting; ZHANG, Guifeng; XIANG, Jianing; WU, Chengde; WO2013/29338; (2013); A1;,
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Application of 19500-02-8, 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. 19500-02-8, name is 3-Methoxy-2-methylaniline, This compound has unique chemical properties. The synthetic route is as follows.

To a solution of 2-methyl-3-(methyloxy)aniline (5.0 g, 36.5 mmol) in p-xylene (80 mL) and cooled to 0¡ã C., added BCl3 (36.5 mL) as a 1M solution in dichloromethane and stirred for 30 min at 0¡ã C. under a nitrogen atmosphere. Acetonitrile (2.6 mL, 54.7 mmol) was added and the solution was stirred for an additional 30 min at 0¡ã C. AlCl3 (4.87 g, 36.5 mmol) was suspended in anhydrous dichloromethane (50 mL) under a nitrogen atmosphere and cooled to 0¡ã C. The xylene solution was transferred to an addition funnel and added to the dichloromethane reaction dropwise. The reaction was stirred at 0¡ã C. for 45 min and the dichloromethane was removed in vacuo. The xylene solution was heated to 70¡ã C. for 18 h and cooled to room temperature. Water (80 mL) was added and the solution was heated to 70¡ã C. for 1 h and cooled to room temperature. The reaction was diluted with ethyl acetate and the aqueous layer separated. The organic layer was washed with an equal volume of water, brine and dried (MgSO4) and concentrated in vacuo. To the residue was added 5:1 hexanes:diethyl ether and the precipitate collected by filtration to afford intermediate 9 as a white solid (4.66 g, 71percent yield). 1H NMR (400 MHz, DMSO-d6) delta ppm 1.87 (s, 3H) 2.42 (s, 3H) 3.77 (s, 3H) 6.30 (d, J=9.04 Hz, 1H) 7.03 (br. s., 2H) 7.65 (d, J=9.04 Hz, 1H). LC-MS (ESI): m/z 180.10 (M+H)+.

The chemical industry reduces the impact on the environment during synthesis 3-Methoxy-2-methylaniline. I believe this compound will play a more active role in future production and life.

Reference:
Patent; GLAXOSMITHKLINE LLC; US2010/196321; (2010); A1;,
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Electric Literature of 13468-02-5,Some common heterocyclic compound, 13468-02-5, name is N,N-Dimethyl-2-phenoxyethanamine, molecular formula is C10H15NO, 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.

Example 5 – Sodium 4-(2-dimethylaminoethoxy)-benzenesulfonate 7.00 g (42.4 mmol) of dimethyl-(2-phenoxyethyl)-amine were dissolved in 35 mL of glacial acetic acid and cooled in an ice bath. 9.63 g (93.3 mmol) of 95% sulfuric acid were dropped in while maintaining an internal temperature of 10C or lower followed by stirring for 1 hour at room temperature. The solution was concentrated followed by the gradual addition of the concentrated residue to 1 mol/L sodium hydroxide to bring pH10, after which the solution was concentrated and dried. After extracting the residue with methanol, concentrating and drying, the residue was suspended in 100 mL of ethanol followed by cooling and filtration. The filtrate was concentrated and the precipitated crystals were filtered to obtain 8.36 g of the target substance (yield: 74%). 1H-NMR (400 MHz, D2O): delta = 7.68 (d,2H,J=8.8 Hz), 7.01 (d,2H,J=8.8 Hz), 4.33 (t,2H,J=5.0 Hz), 3.53 (t,2H,J=5.2 Hz) 13C-NMR (400 MHz, D2O): delta = 158.12, 133.61, 125.61, 112.90, 61.79, 59.66, 41.70 IR (KBr): nu = 3431, 3097, 2770, 1599, 1180, 1032, 844 cm-1

The synthetic route of 13468-02-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Dainippon Ink and Chemicals, Incorporated; EP1736464; (2006); A1;,
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