Ethers-buliding-blocks

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. 658-89-9, name is 4-(Trifluoromethoxy)benzene-1,2-diamine belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Recommanded Product: 658-89-9

Step a. To a solution of 4-(trifluoromethoxy)benzene-l,2-diamine (CAS Number 658-89-9; 0.45 g, 2.34 mmol) in DMF (5 ml) was added urea (0.28 g, 4.66 mmol) at rt. The resulting reaction mixture was heated at 150C for 20 h. The reaction mixture was diluted with water (5 ml) and the brown precipitate was collected by vacuum filtration and dried under reduced pressure to yield 5- (trifluoromethoxy)-l,3-dihydro-2H-benzo[d]imidazol-2-one (0.28 g, 1.28 mmol). LCMS: Method C, 2.118 min, MS: ES+ 219.

The synthetic route of 658-89-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; MISSION THERAPEUTICS LIMITED; STOCKLEY, Martin Lee; KEMP, Mark Ian; MADIN, Andrew; (88 pag.)WO2018/60742; (2018); A1;,
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Electric Literature of 115929-62-9, These common heterocyclic compound, 115929-62-9, name is 3-Bromo-2,5-dimethoxyaniline, 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.

General procedure: In a round bottom flask equipped with a magnetic stirring bar, 0.3mmol of alpha-formyl-beta-carboline (1a) and 0.3mmol of aniline (2a) in 4mL of [Bmim][BF4] was stirred for 12min. Into this reaction mixture were added 0.35mmol of phenylacetylene (3a) and 10mol% of La(OTf)3 and then heated around 95-100C. After completion of the reaction, as indicated by the TLC, water was added and extracted with ethylacetate. The organic layer was dried over anhydrous Na2SO4. The solvent was concentrated under the reduced pressure. Product was purified by column chromatography on silica gel (eluent: Hexanes/ethyl acetate): Colorless solid, 126 mg, 74%, Rf=0.52 (20% EtOAc/Hexanes), mp: 277-279 C; IR (KBr): 3356, 2939, 2841, 1259, 1107, 744, 545 cm-1; 1H NMR (400 MHz, CDCl3, TMS) delta: 12.51 (1H, s), 9.01 (1H, s), 8.77 (1H, s), 8.28 (1H, d, J=7.7 Hz), 7.76-7.78 (1H, m), 7.69 (1H, t, J=7.4 Hz), 7.40-7.45 (6H, m), 6.99 (1H, s), 4.31 (3H, s), 4.08 (3H, s), 3.56 (3H, s); 13C NMR (100 MHz, CDCl3, TMS) delta: 166.7, 156.3, 153.2, 149.7, 147.2, 143.3, 141.9, 141.3, 137.3, 137.2, 136.9, 130.8, 129.2, 128.3, 127.2, 127.1, 122.1, 121.6, 121.3, 120.9, 119.0, 118.9, 116.7, 112.3, 110.3 (aromatic C), 61.6, 55.7, 52.6 (aliphatic C); HRMS (ESI-MS) calcd for C30H22BrN3O4; 590.0692 (M+Na), found: 590.0692. Anal. Calcd for: C, 63.39; H, 3.90; N, 7.39%; found: C, 63.25; H, 3.98; N, 7.21%.

Statistics shows that 3-Bromo-2,5-dimethoxyaniline is playing an increasingly important role. we look forward to future research findings about 115929-62-9.

Reference:
Article; Ramesh, Subburethinam; Nagarajan, Rajagopal; Tetrahedron; vol. 69; 24; (2013); p. 4890 – 4898;,
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22236-10-8, name is 4-(Difluoromethoxy)aniline, 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. Safety of 4-(Difluoromethoxy)aniline

The nitro ether (149 mmol) was dissolved in ethanol (37.5 mL), diluted with water (25 mL), and was treated with ammonium chloride (84.7 mmol) and iron powder (105 mmol). The reaction mixture was heated at reflux for 30 minutes and the suspension was filtered through Celite. The filter cake was washed with ethanol three times and the combined filtrates were concentrated. The residue was dissolved in water and the pH adjusted to 9-10 with 5 M sodium hydroxide. The aqueous layer was extracted with ethyl acetate (3×100 mL) and the combined organic layers were dried (magnesium sulfate) and concentrated to a yellow oil. The oil was dissolved in acetic anhydride (23.5 mmol) and the reaction mixture was maintained at rt for 16 h. The reaction mixture was diluted with water (50 mL) and was neutralized with solid sodium bicarbonate. The precipitated solids were isolated by filtration, washed with water, and dried to provide the acetamide in 62% yield as a light yellow solid.

The synthetic route of 22236-10-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Xie, Wenge; Herbert, Brian; Ma, Jianguo; Nguyen, Truc Minh; Schumacher, Richard; Gauss, Carla Maria; Tehim, Ashok; US2005/250808; (2005); A1;,
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Reference of 43229-65-8, The chemical industry reduces the impact on the environment during synthesis 43229-65-8, name is N-Benzyl-1-(4-methoxyphenyl)propan-2-amine, I believe this compound will play a more active role in future production and life.

1) A compound of the formula II (178.1 g) and a compound of the formula III (161.7 g) are added to a reaction flask and stirred.Heat to internal temperature 90-100 C, reaction 2-3h, to internal temperature 120-130 C, reaction 2-3h to complete(HPLC detection, the peak area is calculated according to the normalization method, and the compound of the formula III is less than 10%, the reaction is considered complete), and the compound of formula IV is obtained, 320.5g,After cooling to 70 ± 5 C, it was dissolved in anhydrous ethanol (220 mL) to prepare for the next step.

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, N-Benzyl-1-(4-methoxyphenyl)propan-2-amine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Guangzhou Health Yuan Breathe Pharmaceutical Engineering Co., Ltd.; Shanghai Fangyu Health Pharmaceutical Technology Co., Ltd.; Yu Xiong; Xiao Duzheng; Zheng Guangji; Chen Yuhua; Yuan Xilun; (28 pag.)CN109535027; (2019); A;,
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Reference of 886762-08-9, 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. 886762-08-9 name is 5-Bromo-2-(trifluoromethoxy)aniline, 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.

General procedure: To a solution of 76 (120 mg, 0.37 mmol) in dry pyridine (12 mL) under N2 at RT, was added 2,4-difluorobenzenesulphonyl chloride (159 mg, 0.74 mmol) in CH2Cl2 (1.5 mL) dropwise over 5 min. The mixture was stirred at 45 C under N2 for 16 , and the solvent then removed under reduced pressure. The reaction was quenched with a little water and the resulting solid collected by filtration and washed with water and Et2O. Purification was carried out by trituration with hot CH2Cl2/MeOH solution to give 4 as a pale brown solid (65%).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 5-Bromo-2-(trifluoromethoxy)aniline, and friends who are interested can also refer to it.

Reference:
Article; Spicer, Julie A.; Miller, Christian K.; O’Connor, Patrick D.; Jose, Jiney; Huttunen, Kristiina M.; Jaiswal, Jagdish K.; Denny, William A.; Akhlaghi, Hedieh; Browne, Kylie A.; Trapani, Joseph A.; European Journal of Medicinal Chemistry; vol. 137; (2017); p. 139 – 155;,
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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. 1579-40-4, name is Di-p-tolyl Ether, A new synthetic method of this compound is introduced below., HPLC of Formula: C14H14O

In einem mit Argon begasten 100 ML Reaktor werden 2 g 4, 4′-OXYBIS (toluen) (CAS Reg. Nr. 1579-40-4) [10 mmol] in 39.2 ml Acetonitril unter Zusatz von 0.8 ML Dimethylsulfoxid [11. 2 mmol] bei 75 C geloest. Zur Loesung werden 60 mg Cu (OAc) 2, 30 mg FES04-7 H20 und 10 ml Wasser beigefuegt. 10.8 g NA2S208 geloest in 30 ML Wasser werden anschliessend unter heftigem Ruehren zugetropft. Nach 45 Minuten ist die Reaktion beendet. Die organische Phase wird mit Ethylacetat erschoepfend extra- hiert. Die gebildeten Produkte werden mit Hilfe der HPLC untersucht. Die Ausbeute des Dialdehyds 4, 4′-OXYBIS (benzaldehyd) (CAS Reg. Nr. 2215-76-1) betraegt 87 mol%. Damit liegt diese Ausbeute gegenueber den Ausbeuten mit bisher bekannten Oxidationsverfahren von 30-40% wesentlich hoeher, wodurch sich die Selektivitaet des erfindungsgemaessen Verfahrens auszeichnet.

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; TEX-A-TEC AG; WO2004/43891; (2004); A1;,
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1484-26-0, A common heterocyclic compound, 1484-26-0, name is 3-Benzyloxyaniline, molecular formula is C13H13NO, 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.

B. 3-Benzyloxyphenyl isocyante. To a stirred solution of 3-benzyloxyaniline (507 mg, 2.54 mmol) in toluene (5 mL) containing TEA (740 muL, 5.34 mmol) was added 20percent phosgene in toluene (1.5 mL, 2.83 mmol). The reaction was stirred for 20 h at rt. The organic layer was washed with H2O (20 mL), dried (MgSO4) and concentrated to give a clear brown oil (497 mg, 87percent). The material was used in subsequent steps without charaterization.

The synthetic route of 1484-26-0 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Butler, Christopher R.; Edwards, James P.; Fourie, Anne M.; Grice, Cheryl A.; Karlsson, Lars; Savall, Brad M.; Tays, Kevin L.; Wei, Jianmei; US2006/223792; (2006); A1;,
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These common heterocyclic compound, 36805-97-7, name is 1,1-Di-tert-butoxy-N,N-dimethylmethanamine, 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. Formula: C11H25NO2

Hexadecandioic acid (40.0 g, 140 mmol) was suspended in toluene (250 ml) and the mixture was heated toreflux. N,N-Dimethylformamide di-tert-butyl acetal (76.3 g, 375 mmol) was added drop-wise over 4 hours. The mixturewas refluxed overnight. The solvent was removed in vacuo at 50 C, and the crude material was suspended in dichloromethane/ethyl acetate (500 ml, 1:1) and stirred for 15 mins. The solids were collected by filtration and triturated withdichloromethane (200 ml). The filtrated were evaporated in vacuo to give crude mono-tert-butyl hexadecandioate, 30grams. This material was suspended in dichloromethane (50 ml), cooled with ice for 10 mins, and filtered. The solventwas removed in vacuo to leave 25 gram crude mono-tert-butyl hexadecandioate, which was recrystallized from heptane(200 ml) to give mono-tert-butyl hexadecandioate, 15.9 g (33 %). Alternatively to recrystallization, the mono-ester canbe purified by silica chromatography with ethyl acetate/heptane. 1H-NMR (CDCl3) delta: 2.35 (t, 2H), 2.20 (t, 2H), 1.65-1.55(m, 4H), 1.44 (s, 9H), 1.34-1.20 (m, 20 H).

The synthetic route of 1,1-Di-tert-butoxy-N,N-dimethylmethanamine has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Novo Nordisk A/S; HOEG-JENSEN, Thomas; JAKOBSEN, Palle; SENSFUSS, Ulrich; FLEDELIUS, Christian; RIBEL-MADSEN, Ulla; (32 pag.)EP2448962; (2016); B1;,
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54149-17-6, name is 1-Bromo-2-(2-methoxyethoxy)ethane, 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. Recommanded Product: 1-Bromo-2-(2-methoxyethoxy)ethane

Hydrazinemonohydrate and ethanol were put into a reaction container under a nitrogen atmosphere. A compound represented by Formula 1-122-1) was added, rollowed by heating and stirring The resultant product was concentrated to obtain a mixture containing a compound represented ny Formula (i-±2/–L)

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

Reference:
Patent; DIC CORPORATION; TENG, Yan; HORIGUCHI, Masahiro; KADOMOTO, Yutaka; KOISO, Akihiro; HAYASHI, Masanao; SAITOU, Yoshitaka; LI, Zhimin; (201 pag.)WO2017/79867; (2017); A1;,
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Adding some certain compound to certain chemical reactions, such as: 1535-73-5, name is 3-Trifluoromethoxyaniline, 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 1535-73-5. 1535-73-5

General procedure: To a stirred solution of 11 (13.14 mmol) in 1,2-dichloroethane (240 mL) were added appropriate substituted anilines (19.71 mmol) and AcOH (13.14 mmol), and the mixture was heated to reflux for 2 h under nitrogen atmosphere. The reaction mixture was cooled to 0 °C, and MeOH (60 mL) and THF (20 mL) were added. To it, (AcO)3BHNa (26.20 mmol) or NaBH4 (52.56 mmol) was added portionwise, and then the reaction mixture was allowed to warm to room temperature and stirred for an additional 3 h. The pH of the reaction mixture was adjusted to 7?8 at 0 °C with 1 NHCl, and then the organic layer was separated. The aqueous layer was extracted with CH2Cl2 (2× 300 mL). The combined organic layers was washed with brine (300 mL) and dried over anhydrous Na2SO4, filtered, and evaporated to dryness under reduced pressure. The residue was purified by MPLC on silica gel to afford the titled compounds as a solid.

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 3-Trifluoromethoxyaniline.

Reference:
Article; Jin, Cheng Hua; Krishnaiah, Maddeboina; Sreenu, Domalapally; Subrahmanyam, Vura Bala; Park, Hyun-Ju; Park, So-Jung; Sheen, Yhun Yhong; Kim, Dae-Kee; Bioorganic and Medicinal Chemistry; vol. 22; 9; (2014); p. 2724 – 2732;,
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