Category: 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. 35822-58-3, name is 2-Bromobenzaldehyde diethyl acetal belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Product Details of 35822-58-3

To a mechanically stirred solution of 1-bromo-2-(diethoxymethyl)benzene (266 g) in dry diethyl ether (1.5 L) cooled to -70 0C under nitrogen was added a 2.5M solution of n-butyl lithium in hexanes (414 ml.) dropwise over 30 min. The reaction mixture was stirred at a temperature less than -60 0C for 45 min then a solution of 4-bromo-2- fluorobenzaldehyde in dry diethyl ether (1.5 L) was added dropwise over 1 h maintaining the low temperature. The cooling bath was removed allowing the reaction to warm to +10 0C over 3 h. The reaction was quenched by the addition of water (500 mL). Organic layer was separated and the aqueous layer washed with ethyl acetate (2 x 500 mL). Combined organic layers were washed with brine then dried over anhydrous sodium sulfate and evaporated to yield the title product (371.1 g) as a yellow oil.

The synthetic route of 35822-58-3 has been constantly updated, and we look forward to future research findings.

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 20781-20-8 as follows. category: ethers-buliding-blocks

Ethyl bromoacetate (Scheme 28) (10.0 gm, 59.87 mmol) solution in 20.0 mL of anhydrous THF was added dropwise to a solution of (2,4-dimethoxybenzyl)amine (10.0 gm, 59.81 mmol) and tri ethyl amine (6.06 gm, 59.87 mmol) in anhydrous THF (20.0 mL) at 0 C under nitrogen atmosphere. The reaction mixture was warmed to room temperature and stirred overnight. Brine was added – 100 mL, and the reaction mixture was extracted with ethyl acetate (2 x – 100 mL). Combined extracts were dried over anhydrous MgS04 and concentrated under reduced pressure. The purification was performed using combiFlash chromatography, Gradient: 20:80 to 50:50 v/v Ethyl acetate: Hexane. 7.6 gm (yield 50.2 %) of the alkylation product was obtained as a colorless liquid m/z calculated for C13H19NO4 [M+H]+: 254; Obtained: 254.1.

According to the analysis of related databases, 20781-20-8, the application of this compound in the production field has become more and more popular.

Some common heterocyclic compound, 82172-73-4, name is O-(2-Methoxyethyl)hydroxylamine hydrochloride, molecular formula is C3H10ClNO2, 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. Product Details of 82172-73-4

Example 6-7 [0239] The Z isomer of cyclopropyl(6,6-diphenyl-6,7-dihydro-1H-indazol-3-yl)methanone O-(2-methoxyethyl)oxime may be prepared in the following manner: [0240] A suspension of 0.74 g of cyclopropyl(6,6-diphenyl-6,7-dihydro-1H-indazol-3-yl)methanone and 0.70 g of O-(2-methoxyethyl)hydroxylamine hydrochloride in 50 cm3 of pyridine is refluxed for about 7 hours. The solution obtained is concentrated to dryness under reduced pressure (13 kPa). The residue is taken up in 150 cm3 of dichloromethane. The solution is washed with three times 80 cm3 of water, dried over magnesium sulphate, filtered and concentrated to dryness under reduced pressure (13 kPa). The mixture of the Z and E isomers is separated by flash chromatography on a column of silica [eluent: dichloromethane/methanol (98/2 by volume)], collecting 60 cm3 fractions. [0241] Fractions 111 to 135 are combined and concentrated to dryness under reduced pressure (13 kPa). 0.37 g of the Z isomer of cyclopropyl(6,6-diphenyl-6,7-dihydro-1H-indazol-3-yl)methanone O-(2-methoxyethyl)oxime, corresponding to Example 6-7A, is thus obtained in the form of a resin, the characteristics of which are as follows: [0242] 1H NMR spectrum: (300 MHz, (CD3)2SO d6 with addition of a few drops of CD3COOD d4, delta in ppm): from 0.70 to 0.90 (mt: 4H); 1.81 (mt: 1H); 3.22 (s: 3H); 3.40 (s: 2H); 3.56 (t, J=5.5 Hz: 2H); 4.13 (t, J=5.5 Hz: 2H); 6.25 (d, J=10 Hz: 1H); 6.89 (d, J=10 Hz: 1H); from 7.10 to 7.30 (mt: 10H). [0243] IR spectrum (solvent CCl4) [0244] 3459; 3316; 2932; 2882; 1597; 1492; 1446; 1386; 1291; 1145; 1126; 1069; 1027; 1007; 952; 894; 700; 683 and 541 cm-1 [0245] O-(2-Methoxyethyl)hydroxylamine hydrochloride may be prepared as described by Dae-Kee Kim et al., J. Med. Chem., 40, 15, 1997, 2363-2373.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 82172-73-4, its application will become more common.

Some common heterocyclic compound, 7252-83-7, name is 2-Bromo-1,1-dimethoxyethane, molecular formula is C4H9BrO2, 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 C4H9BrO2

To NaH (357 mg (600 mg 60% in mineral oil, hexane washed 3X), 14. 86 mmol) was added dry THF (100 ml), 4 -METHOXY-4-METHYL-BIPHENYL-3-OL (1.59 g, 7.43 mmol), and 2-BROM-1, 1-DIMETHOXY ethane (1.76 g, 10.40 mmol). The reaction was stirred at 60 C overnight, cooled, passed through a silica plug and concentrated to 1.66 g (74%) of product as a white solid: mp 39-40 C ; 1H NMR (300 MHz, DMSO-D6) : 8 2.17 (3H, s), 3.38 (6H, s), 3.79 (3H, s), 4.09 (2H, d, J = 5.2 Hz), 4.73 (1H, t, J = 5.2 Hz), 7. 00 (2H, d, J = 8. 8 Hz), 7.09 (1H, dd, J = 7.7 Hz, 1.5 Hz), 7.15 (1H, d, J = 1.2 Hz), 7.18 (1H, d, J = 7. 8 Hz), 7.62 (2H, d, J = 8. 8 Hz); MS (ESI) RNLZ 303 ([M+H]+). Anal. for CL8H2204 : Calc’d: C: 71.50 H: 7.33 Found: C: 71.46 H: 7.04

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 7252-83-7, its application will become more common.

Application of 1484-26-0, 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. 1484-26-0, name is 3-Benzyloxyaniline belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

A suspension of 2-(3-trifluoromethylphenylamino)-5-bromopyrimidine (200 mg, 0.63 mmol), 3-benzyloxyaniline (280 mg, 1.38 mmol), tra(dibenzylideneacetone) palladium(O) (23 mg, 25.0 mumol), 4,5-iw(diphenylphosphino)-9,9-dimethylxanthene (29 mg, 50.3 mumol) and cesium carbonate (530 mg, 1.50 mmol) in degassed 1,4- dioxan (5 mL) was heated at 100 °C for 24 h. After cooling to room temperature, the mixture was diluted with ethyl acetate and washed with water and brine. The organic phase was dried (MgSO4) and the solvent removed under reduced pressure. The crude product was purified by column chromatography on silica gel eluting with 1:6 ethyl acetate/petroleum ether to afford the target compound as a yellow solid (71 mg, 25 percent). deltaH (dbeta-OMSO, 400 MHz): 5.09 (2 H, s), 6.47 (1 H, dd), 6.53 (2 H, m), 7.13 (1 H, t), 7.26 (1 H, d), 7.36 (1 H, m), 7.40-7.47 (4 H, t), 7.53 (1 H, t), 8.01 (1 H, s), 8.04 (1 H, d), 8.24 (1 H, s), 8.42 (2 H, s) and 8.90 (1 H, s). LCMS (AP+): 437 (MH+, 100 percent).

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, 3-Benzyloxyaniline, other downstream synthetic routes, hurry up and to see.

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. 93919-56-3, name is (4-(Trifluoromethoxy)phenyl)methanamine, This compound has unique chemical properties. The synthetic route is as follows., HPLC of Formula: C8H8F3NO

General procedure: The chiral monomer (R)-2-(2,4-bis(benzyloxy)-5-chlorobenzoyl)-1, 2,3,4-tetrahydroisoquinoline-3-carboxylic acid 9 (100 mg, 0.19 mmol), EDCI (43.7 mg, 0.228 mmol), HOBt (30.8 mg, 0.228 mmol) and 2-chloro benzylamine (0.15 mL, 1.2 mmol) in DMF (3 mL) was stirred overnight at room temperature. The organic layer was washed successively with 2 M HCl and 2 M NaOH, then dried over anhydrous/Na2SO4, filtered and evaporated under vacuum to afford a yellowish powder that was used for the next step reaction without further purification. To the anhydrous CH2Cl2 (3 mL) solution of this product cooled to 0 C under N2 was added BCl3 (1.0 M in CH2Cl2, 0.57 mL, 0.56 mmol). The reaction mixture was allowed to warm to RT and stirred for 1.5 h. Sat. NaHCO3 solution (5 mL) was added and CH2Cl2 was removed under vacuum. The aqueous residue was extracted with EtOAc (4 x 10 mL) and evaporated under vacuum to produce a brown powder. The powder was purified by column chromatography over silica gel eluted with CH2Cl2-MeOH (30: 1, v/v) to give compound 10 (82.8 mg) as a white powder, yield: 91%.

According to the analysis of related databases, 93919-56-3, the application of this compound in the production field has become more and more popular.

Synthetic Route of 1836-62-0, 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. 1836-62-0, name is 2-(2-Methoxyphenoxy)ethylamine belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

General procedure: Corresponding 2-(aryloxymethyl)oxiranes (5 mmol, 1 equiv) and amines (7.5 mmol, 1.5 equiv) were dissolved in 30 mL i-PrOH. The reaction was purged with argon 3 times and stirred at reflux for 5 h, andthen the mixture was cooled to room temperature and added AcOEt.After washing with brine 3 times, the organic layer was dried overanhydrous Na2SO4, filtered, and evaporated in vacuo. Purification ofthe crude residue by column chromatography on silica gel yielded target compounds.

The synthetic route of 2-(2-Methoxyphenoxy)ethylamine has been constantly updated, and we look forward to future research findings.