Category: 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. 944317-92-4, name is 1-Bromo-4-fluoro-5-isopropyl-2-methoxybenzene, A new synthetic method of this compound is introduced below., COA of Formula: C10H12BrFO

General procedure: A 500 mL dry flask was charged with 1-bromo-4-fluoro-5-isopropyl-2-methoxybenzene (BrMIP) (24.60 g, 0.10 mol) and dissolved in toluene (80 mL) and THF (80 mL). The resulting solution was flushed with argon, and tri- isopropylborate (32 mL, 0.1 mol) was added. The mixture was cooled to -80 C. Then 2.5 n-BuLi in hexanes (48 mL, 0.12 mol) was added slowly, maintaining a temperature below -55C. After completion of the n-BuLi addition, the reaction mixture was slowly warmed (1 hour) to -10C and water (120 mL) was added, followed by commercially available 2-bromo-5-(trifluoromethyl)benzonitrile (Formula VI’, X = Br, R2 = CN) (25.00 g, 0.10 mmol) and the catalyst, 1 , 1 bis( di-tertbutylphosphino)ferrocene palladium dichloride (265 mg, 0.8 mol%) addition. The organic layer turns dark brown immediately. The biphasic mixture is aged at room temperature with vigorous stirring for 12 hours. The aqueous layer was removed and the organic layer was washed with 1 M NaOH (aq) (100 mL), water (300 mL) and filtered through silica gel. The solvent was removed under reduced pressure to yield brown oil which was crystallized from EtOH/water (300/100 mL). The resulting slurry was filtered and the filter cake was washed with cold 50% EtOH. The product was dried at 40 C under vacuum to yield 4′-fluoro-5′- isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-carbonitrile (Formula VII’, Ri = CN, R2 = isopropyl) as a pale white solid (25.20 g, 75%). According to the same procedure in various scales and different concentrations of catalyst some other biaryl of Formula Vlh and Vll2 are prepared and listed in Table 3 and Table 4, respectively. For NMR data and melting points see Table 1 and 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.

Synthetic Route of 592-55-2, 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 592-55-2 as follows.

General procedure: A suspension of methyl 3-hydroxybenzoate (104 mg, 0.68 mmol), 2-bromoethyl ethyl ether (0.22 mL, 2.0 mmol) and K2CO3 (550 mg, 4.0 mmol) in DMF (13 mL) was stirred for 16 h at 70 C. After addition of a saturated solution of NaHCO3 the mixture was extracted with EtOAc. The organic layer was washed with brine and dried over Na2SO4. The solvent was removed under reduced pressure and the residue was purified by flash chromatography (hexane/EtOAc 5:1) to give 4a in 89% yield (136 mg).

According to the analysis of related databases, 592-55-2, the application of this compound in the production field has become more and more popular.

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. 5414-19-7, name is 1-Bromo-2-(2-bromoethoxy)ethane, A new synthetic method of this compound is introduced below., Recommanded Product: 5414-19-7

To a dimethylformamide (“DMF”) (50 mL) solution of the product of Part B (6.40 g, 15.2 mmol) was added K2CO3 (6.6 g, 47.8 mmol), 18-crown-6 (1.2 g, 4.5 mmol), and bis(2-bromoethyl)ether (2.8 mL, 22. mmol). The resulting slurry was stirred at 60 C. for 24 hr, and then at room temperature for an additional 16 hr. The solvent was stripped in vacuo, and the residue was partitioned between ethyl acetate (150 mL) and water (100 mL). The organic layer was separated, and the aqueous layer was extracted with EtOAc (3*150 mL) and CH2Cl2 (100 mL). The combined organic layers were dried over MgSO4 and evaporated to form a tan solid. The solid was triturated with diethyl ether, and the precipitate was isolated by filtration and washed with diethyl ether (2*25 mL) to afford 4.79 g (64% yield) of the desired acid in the form of a white solid. LCMS: m/z=513, 515 (M+H).

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.

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 5414-19-7 as follows. SDS of cas: 5414-19-7

6.0 g (24.7 mmol) of ethyl 4-bromophenylacetate were dissolved in 120 ml of abs. DMF under argon, 1.48 g (37.0 mmol, 60% strength) of sodium hydride were added, while cooling in an ice bath, and the mixture was stirred for 30 min. 5.72 g (24.7 mmol) of bis(2-bromoethyl)ether were then added, while constantly cooling in an ice bath, and the mixture was stirred at approx. 0 C. for 1 h. After renewed addition of 1.48 g of 60% strength sodium hydride, the mixture was stirred again for 1 h, while cooling in an ice bath. Saturated aqueous ammonium chloride was then added and the mixture was extracted with ethyl acetate. The organic phase was washed with water and with saturated sodium chloride solution, dried over magnesium sulphate, filtered and concentrated on a rotary evaporator. The residue was purified by column chromatography over silica gel (mobile phase: cyclohexane/ethyl acetate 10:1). 2.62 g (33% of th.) of the title compound were obtained.1H-NMR (400 MHz, CDCl3, delta/ppm): 7.47 (d, 2H), 7.25 (d, 2H), 4.14 (q, 2H), 3.93 (dt, 2H), 3.56 (td, 2H), 2.59 (dd, 2H), 1.93 (m, 2H), 1.19 (t, 3H).MS (DCI, NH3): m/z=329/331 [M+NH4]+.LC/MS (method F, ESIpos): Rt=1.33 min, no ionization.

According to the analysis of related databases, 5414-19-7, the application of this compound in the production field has become more and more popular.

Synthetic Route of 171290-52-1, These common heterocyclic compound, 171290-52-1, name is 3,5-Dimethoxyphenylacetylene, 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-(Benzenesulfonyl)-2-[2-(3,5-dimethoxyphenyl)ethynyl]-5H-pyrrolo[2,3-b]pyrazine 5-(Benzenesulfonyl)-2-bromo-5H-pyrrolo[2,3-b]pyrazine (3.50 g, 10.35 mmol), copper(1+) iodide (197.1 mg, 1.03 mmol) and palladium tetrakis triphenylphospine (597.7 mg, 0.52 mmol) were dissolved in MeCN (40 ml). Reaction mixture was degassed with nitrogen for 5 mins. 1-ethynyl-3,5-dimethoxybenzene (2.52 g, 15.52 mmol) and DIPEA (8.96 ml, 51.75 mmol) were added and reaction heated to 80C, under a nitrogen atmosphere, for 2 h. Reaction mixture was allowed to cool to RT, then to 0C and left to stand overnight. The beige precipitate formed after this time was filtered off, dissolved in EtOAc, washed with water and concentrated. Crude material was re-crystallised from EtOAc to give the title compound as a yellow solid (3.16 g, 73%). 1H NMR (500 MHz, Chloroform-d) delta 8.55 (s, 1H), 8.24 – 8.13 (m, 2H), 8.04 (d, J = 3.7 Hz, 1H), 7.66 – 7.60 (m, 1H), 7.52 (t, J = 7.9 Hz, 2H), 6.82 (s, 1H), 6.77 (d, J = 2.2 Hz, 2H), 6.51 (t, J = 2.2 Hz, 1H), 3.80 (s, 6H). M/Z: 419.09, M+1: 419.95, tR= 1.59 min (System 1).

The synthetic route of 171290-52-1 has been constantly updated, and we look forward to future research findings.

Adding a certain compound to certain chemical reactions, such as: 1535-75-7, name is 2-(Trifluoromethoxy)aniline, 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 1535-75-7, COA of Formula: C7H6F3NO

General procedure: Acetamides (1a-1x, 1ab, 1ac and 1ba-1bc). To a solution of 2-phenylacetic acid (7.0mmol), 2-(trifluoromethoxy)aniline (7.7mmol) in anhydrous CH2Cl2 (25mL) were added EDCI (1.745g, 9.1mmol) and DMAP (256.6mg, 2.1mmol). The reaction mixture was stirred at room temperature overnight, diluted with HCl (1M) aqueous solution, and extracted with CH2Cl2 (3×25mL). The combined organic phase was washed with saturated NaHCO3 aqueous solution and brine, dried over anhydrous Na2SO4, and concentrated under vacuum. Purification by flash chromatography (Silica gel, petroleum ether: ethyl acetate=50: 1 as eluent) gave the corresponding 2-phenyl-N-[2-(trifluoromethoxy)phenyl]acetamide compound.

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

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 53087-13-1 as follows. COA of Formula: C13H11BrO

Preparation 3 3-Benzyloxyphenyl Boronic Acid A solution of 3-benzyloxy-bromobenzene 10 g (38 mmol) in 150 mL of anhydrous THF was cooled to -70 C. under a nitrogen atmosphere. 28.5 mL of n-butyl lithium (1.6M in hexanes) was added dropwise to the solution. The reaction mixture was stirred for 30 minutes, then tri-isopropyl borate 10.6 mL (45.6 mmol) was added. The reaction mixture was allowed to warm to ambient temperature over a two hour period. The reaction was quenched by the addition of 200 mL of 1N HCl and the reaction mixture was stirred for an additional hour. The slurry was extracted twice with EtOAc and the organic layer separated and combined. The EtOAc solution was washed twice with brine, dried with Na2 SO4, and evaporated to a yellow oil. The product was crystallized from ether-hexane. This yielded 4.85 g of the title compound as white solid. PMR: Consistent with the proposed structure.

According to the analysis of related databases, 53087-13-1, the application of this compound in the production field has become more and more popular.

Adding a certain compound to certain chemical reactions, such as: 59557-91-4, name is 4-Bromo-2-methoxyaniline, 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 59557-91-4, name: 4-Bromo-2-methoxyaniline

A mixture of Example 175A (36.4 g, 180 mmol), and di-tert-butyl dicarbonate (47.2 g, 216 mmol) in THF (500 mL) was heated to reflux for 20 hours and cooled to ambient temperature. HPLC (using the conditions from Example 175A, product Rt=13.55 min and TLC (8:2 heptane/ethyl acetate, Rf of product=0.53, Rf of 4-bromo-2-methoxyaniline=0.27) indicated approximately 10% starting material was remaining. Additional di-tert-butyl dicarbonate (3.9 g, 18 mmol) was added and heating was continued for another 5 hours. The mixture was cooled and evaporated under reduced pressure. The residue was applied to a 400 gram silica gel column and eluted with 8:2 heptane/ethyl acetate. The fractions showing the desired product were combined and washed with saturated NaHCO3 and then brine. The organic solution was dried (MgSO4), filtered, and concentrated to provide 61.3 g of a mixture of the desired product and di-tert-butyl dicarbonate which was used directly in the next step

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 4-Bromo-2-methoxyaniline, and friends who are interested can also refer to it.

Electric Literature of 50742-37-5, 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. 50742-37-5 name is (3-Phenoxyphenyl)methanamine, 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.

C) 3-oxo-2-(3-phenoxybenzyl)isoindoline-5-carbonitrile Under nitrogen atmosphere, a mixture of methyl 2-(bromomethyl)-5-cyanobenzoate (100 mg), 1-(3-phenoxyphenyl)methanamine (94 mg), DIEA (0.082 mL) and THF (7 mL) was stirred at 50C for 6 hr, and then overnight at room temperature, and the reaction mixture was concentrated under reduced pressure. To the residue was added water, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate) to give the title compound (123 mg). MS (API+), found: 341.2 (M+1)

At the same time, in my other blogs, there are other synthetic methods of this type of compound, (3-Phenoxyphenyl)methanamine, and friends who are interested can also refer to it.

Electric Literature of 1836-62-0, 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. 1836-62-0, name is 2-(2-Methoxyphenoxy)ethylamine, This compound has unique chemical properties. The synthetic route is as follows.

General procedure: To a solution of 2-phenoxy-ethylamine (5 eq.) or 2-(2-methoxyphenoxy-)ethylamine (5 eq.) in 2-methoxyethanol(25 mL per mmol of amine) the appropriate aliphatic chloride33-39 (1 eq.) and KI (cat.) was added. The mixturewas refluxed for18-48 h and concentrated. The residue was suspended in CHCl3and washed with 1M NaOH, brine, dried over anhydrous Na2SO4and concentrated. The crude was purified by flash chromatographyto give the titled compound.

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