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. 51388-20-6, name is 4-(Benzyloxy)aniline hydrochloride, A new synthetic method of this compound is introduced below., HPLC of Formula: C13H14ClNO

A. 1H-Indazole-3-carboxylic acid (4-benzyloxy-phenyl)-amide DIEA (9.3 mL, 53.4 mmol) was added to a solution of 4-benzyloxyaniline hydrochloride (4.0 g, 17.0 mmol), indazole-3-carboxylic acid (2.89 g, 17.8 mmol) and HBTU (7.1 g, 18.7 mmol) in DMF (60 mL), and the resulting solution was stirred at ambient temperature for 24 hours. The solution was heated to 70 C for 4 hours, and then poured into a mixture of saturated aqueous sodium bicarbonate on ice. The product, an off white solid, 6.0 g, was collected by filtration, washed with water and used without further purification in the subsequent reaction. MS m/z344 (MH+).’H NMR (DMSO-d6) 8 5.11 (s, 2H), 7.02 (d, 2H), 7.26-7. 48 (m, 7H), 7.67 (d, 1 H), 7.75 (d, 2H), 7.81 (d, 1 H), 8. 24 (d, 1 H) and 10.24 (s, 1H).

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; JANSSEN PHARMACEUTICA N.V.; WO2005/84663; (2005); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Adding a certain compound to certain chemical reactions, such as: 101-84-8, name is Diphenyl oxide, 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 101-84-8, Formula: C12H10O

EXAMPLE 1; A reactor is configured from a 1-liter Morton flask with a mechanical stirrer, thermometer, a 60 mL addition funnel, and a distillation column. The condenser from the distillation column is connected to a H2O trap. A small N2 purge is added to the line from the condenser to the H2O trap. The reactor is charged with AlCl3 and bromine. The addition funnel is charged with diphenyl oxide. The reactor is heated to 55 C. and the diphenyl oxide is added drop-wise supersurface to the bromine. The reactor is heated by a mantle. After all of the diphenyl oxide has been added, the addition funnel is replaced with a Br2 feed line. After several minutes of refluxing, the distillation of Br2 (containing HBr) is initiated. At the same time, the Br2 feed is initiated. As needed, the feed rate of the Br2 is adjusted so that the volume in the reactor remains fairly constant. After the distillation and concurrent replacement feed of Br2 are conducted for an hour, the liquid mixture is cooled to 55 C., some deionized H2O is added, and most of the Br2 is distilled off. When most of the Br2 is gone, more deionized water is added. The remaining Br2 is then distilled. The remaining mixture is cooled to 60 C., and a portion of an aqueous 25% NaOH solution is added to make the pH 13-14. The resultant mixture is filtered and washed well with deionized water. A sample is subjected to GC analysis and then is oven dried.

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

Reference:
Patent; ALBEMARLE CORPORATION; US2008/58558; (2008); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Related Products of 592-55-2, 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. 592-55-2, name is 1-Bromo-2-ethoxyethane belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

(A) A mixture of 4-bromo-3-methylphenol (10 g, 53.47 mmol), 1-bromo-2- ethoxyethane (10.62 g, 69.40 mmol) and K2CO3 (11.13 g, 79.95 mmol) in DMF (100 mL) was stirred overnight at 75 C. After cooling to rt, brine (250 mL) was added and the mixture was extracted with EtOAc (4 x 100 mL). The combined organic extracts were washed with brine (4 x 100 mL), dried (Na2SO4), filtered, and concentrated under reduced pressure. Purification of the resultant residue by silica gel chromatography (5% EtOAc/petroleum ether afforded 1-bromo-4-(2-ethoxyethoxy)-2-methylbenzene (12.25 g, 88 %) as light yellow oil which was used directly.

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

Reference:
Patent; JANSSEN PHARMACEUTICA NV; KUO, Gee-Hong; PLAYER, Mark R.; YANG, Shyh-Ming; ZHANG, Yue-Mie; HUANG, Hui; (260 pag.)WO2016/57731; (2016); A1;,
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Some common heterocyclic compound, 24988-36-1, name is 1,5-Dibromo-2,4-dimethoxybenzene, molecular formula is C8H8Br2O2, 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. Computed Properties of C8H8Br2O2

Add to the dry three-necked flask with a magnetic rotor 1,3-dibromo-4,6-dimethoxybenzene (3.0515 g, 10 mmol, 97%, 1.0 eq),4-biphenylboronic acid (4.4449 g, 22 mmol, 98%, 2.2 equivalents),palladium acetate (0.0674g, 0.3mmol,0.03 equivalents) and the ligand S-Phos (0.2513 g, 0.6 mmol, 98%, 0.06 equivalents).Nitrogen gas was distilled off three times, and then an aqueous solution (20 mL) of 1,4-dioxane (60 mL) and potassium carbonate (6.9100 g, 50 mmol, 5.0 eq. The three vials were then placed in a 110 C oil bath. After stirring for 24 hours, the reaction was monitored by thin layer chromatography. After cooling to room temperature, the organic phase was separated and aqueous was extracted with ethyl acetate (30mL×2).The organic phases were combined, dried over anhydrous sodium sulfate, filtered and evaporated.The crude product was separated and purified by flash column chromatography on silica gel (eluent: petroleum ether / ethyl acetate = 50/1) to give A5, white solid 4.4216g, 99% yield.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 24988-36-1, its application will become more common.

Reference:
Patent; Zhejiang University of Technology; Li Guijie; Dai Jianxin; Chen Shaohai; Feng Qi; (28 pag.)CN110183476; (2019); A;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Reference of 929-75-9,Some common heterocyclic compound, 929-75-9, name is 1,11-Diamino-3,6,9-trioxaundecane, molecular formula is C8H20N2O3, 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: Diester1 (1mmol) and the appropriate diamine2-6 (1mmol) were dissolved in dry methanol (50mL) and sodium methoxide (2mmol) was added. A mixture was stirring for 72hat room temperature. After completion of the reaction (controlled by TLC), the solvent was evaporated under reduced pressure and the oily residue was purified by column chromatography (1-5% MeOH in CH2Cl2). All the macrocyclic products obtained in this way are colourless solids, stable to air.

The synthetic route of 929-75-9 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Pikus, Grzegorz; Jurczak, Janusz; Tetrahedron; vol. 72; 16; (2016); p. 1928 – 1932;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Application of 261762-35-0, These common heterocyclic compound, 261762-35-0, name is 5-Bromo-1,2-difluoro-3-methoxybenzene, 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.

In a 50 mL round-bottom flask, introduce 1 g (4.48 mmol) of 5-bromo-2,3-difluoroanisole in 25 mL of dioxane then add 1.708 g (6.73 mmol) of bis(pinacolato)diboron, 1.320 g (13.45 mmol) of potassium acetate and 0.183 g (0.224 mmol) of bis(diphenylphosphino)ferrocene-palladium(II)dichloride dichloromethane complex. The reaction mixture is stirred at 80 C. overnight. After returning to room temperature, the reaction is hydrolyzed by slow addition of water and extracted with ethyl acetate. The organic phase is dried over sodium sulfate, filtered and concentrated. The residue obtained is purified by chromatography on silica gel (eluent: cyclohexane/ethyl acetate: 95:5) to afford 197 mg (15%) of intermediate 13 as a yellow solid. (0484) LCMS (EI, m/z): (M+1) 271.08 (0485) 1H NMR: dH ppm (400 MHz, DMSO): 7.13-7.17 (2H, m, CHarom), 3.90 (3H, m, CH3), 1.30 (12H, m, CH3).

The synthetic route of 261762-35-0 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; PIERRE FABRE MEDICAMENT; KALOUN, El Bachir; GRISONI, Serge; GOMES, Bruno; SCHMITT, Philippe; (43 pag.)US2017/281622; (2017); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

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. 592-55-2, name is 1-Bromo-2-ethoxyethane, A new synthetic method of this compound is introduced below., Quality Control of 1-Bromo-2-ethoxyethane

Example 38Synthesis of (Z)-2-ethoxy-3-[2-(2-ethoxyethoxy)-3′-(1-methyl-3-pentylureido)biphenyl-4-yl]acrylic acid a-Methyl 3-(2-ethoxyethoxy)-4-iodobenzoate:3.15 g (20 mmol) of 2-bromoethyl ethyl ether and 3.4 g (24.6 mmol) of potassium carbonate are added to a solution of 5.7 g (20 mmol) of methyl 3-hydroxy-4-iodobenzoate (prepared according to Example 19d) in 50 mL of methyl ethyl ketone. The reaction mixture is heated at 80 C. for 12 hours. The reaction is stopped by addition of 50 mL of water and extraction with ethyl acetate. The organic phases are combined and dried over sodium sulfate. The solvents are evaporated off and the residue is then purified by chromatography on a column of silica eluted with an 80/20 heptane/ethyl acetate mixture. 5.93 g (83%) of methyl 3-(2-ethoxyethoxy)-4-iodobenzoate are obtained in the form of a colorless oil.

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; GALDERMA RESEARCH & DEVELOPMENT; US2009/12129; (2009); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Electric Literature of 14804-31-0, The chemical industry reduces the impact on the environment during synthesis 14804-31-0, name is 4-Bromo-1-methoxy-2-methylbenzene, I believe this compound will play a more active role in future production and life.

EXAMPLE 109; Preparation of 2-Amino-5-(4-methoxy-3-methyl phenyl)-3-methyl-5-(2-phenylpyridin-4-yl)-3,5-dihydro-4H-imidazol-4-one; Step a) [(4-Methoxy-3-methylphenyl)ethynyl](trimethyl)silane; A solution of 4-bromo-1-methoxy-2-methylbenzene (6.702 g) in toluene was treated with tetrakis(triphenylphosphie)palladium (0) (1.15 g), followed by diisopropylamine (23 mL), trimethylsilyl acetylene (4.7 mL) and copper iodide (I) (0.127 g). The reaction was heated at 45 C. in nitrogen atmosphere overnight and evaporated to dryness. The resultant residue was applied on a large silica pad and eluted with hexane:ethyl acetate (2:1). The elute was evaporated to dryness to give the silane intermediate as a brown oil (7.167 g). The compound was characterized by LCMS analysis. LCMS Conditions: HP 1100 HPLC system; Waters Xterra MS C18, 2 mm (i.d.)×50 mm (length), 3.5 um column, set at 50 C.; Flow rate 1.0 mL/min; Solvent A: 0.02% NH4OH in water; Solvent B 0.02% NH4OH in ACN; Gradient: Time O: 10% B; 2.5 min 90% B; 3 min 90% B; Sample concentration: 2.0 mM; Injection volume: 5 uL; Detection: 220 nm, 254 nm DAD

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, 4-Bromo-1-methoxy-2-methylbenzene, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Wyeth; US2007/4730; (2007); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Application of 24878-25-9, 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. 24878-25-9 name is 2,2′-Oxydianiline, 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 method: An equimolar mixture of RhCl3·3H2O with the corresponding ligand Ln in 15mL of hot methanol was refluxed for 24h. After cooling to room temperature, the solid formed was filtered off and dried in vacuum; then it was washed with cold methanol (2×4mL). Synthesis of [RhIII(L1)Cl3] (1) RhCl3 3H2O (0.080g, 0.304mmol), L1 (0.050g, 0.231mmol). Yellow solid. Yield 68% (0.085g). M. p.: above 250 C. Anal. Calc. for C12H12Cl3N2ORh (1): C, 35.20; H, 2.95; N, 6.84. Found; C, 34.95; H, 2.87; N, 6.80%. IR data (KBr, cm-1): 3433 (NH); 3200, 3096 (CHaromatics); 1602, 1491 (C=C); 1264 (C-O-C). Raman data (cm-1): 414 (Rh-N); 316 (Rh-Cl); 279 (Rh-O). 1H NMR (DMSO-d6) delta=7.53 (d, 2H, NHA, 2J=9.97Hz), 7.50 (d, 2H, H3, 3J=7.26Hz), 7.24 (d, 2H, NHB, 2J=9.97Hz), 7.20-7.12 (m, 4H, H4, H6), 7.03 (dd, 2H, H5, 3J=7.03, 3J=7.03Hz).

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

Reference:
Article; Alvarado-Rodriguez, Jose G.; Hernandez-Balderas, Uvaldo; Andrade-Lopez, Noemi; Salazar, Veronica; Sanchez-Cabrera, Gloria; Zuno-Cruz, Francisco J.; Polyhedron; vol. 117; (2016); p. 453 – 462;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Application of 19500-02-8, These common heterocyclic compound, 19500-02-8, name is 3-Methoxy-2-methylaniline, 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.

A mixture of 1-methoxy-2-methyl-3-aminobenzene 15.0 g, triphosgene 48.7 g and toluene 350 mL was stirred withheating under ref lux for three hours. The reaction mixtures after standing to cool were condentrated under reduced pressure to give 1-methoxy-3-isocyanato-2- methylbenzene 17.0 g.?H NMR (CDC13) : 2.19(3H, S), 3.82(3H, 5), 6.69(1H, d, J=8.2Hz), 6.72(1H, dd, J=0.5, 8.0Hz), 7.09(1H, t, J=8.2Hz)

Statistics shows that 3-Methoxy-2-methylaniline is playing an increasingly important role. we look forward to future research findings about 19500-02-8.

Reference:
Patent; SUMITOMO CHEMICAL COMPANY, LIMITED; YOSHIMOTO, Yuya; TAKAHASHI, Teruki; OOHIRA, Daisuke; AZUMA, Shuhei; WO2013/162077; (2013); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem