Month: April 2021

Related Products of 1978-39-8,Some common heterocyclic compound, 1978-39-8, name is 5-Fluoro-2-methoxyaniline, molecular formula is C7H8FNO, 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 2 (5) obtained in 2 – [[5- (4-hydroxy-3-methoxyphenyl)-4-(lH-pyrrol-1-yl)-4H-1,2,4-triazole -3 – yl] thio] acetic acid (200mg, 0.58mmol),1-hydroxybenzotriazole (80mg, 0.6mmol),1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride (120 mg, 0.6 mmol)Of N, N-dimethylformamide (4 ml)Was added triethylamine (0.18ml, 1.2mmol)When the 5-fluoro-2-methoxy aniline (0.08ml, 0.7mmol)Was stirred for 16 hours at room temperature added.It was extracted by the addition of 1N hydrochloric acid and ethyl acetate to the reaction solution. Further, the aqueous layer was extracted twice with ethyl acetate, the organic layer was dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, the residue was purified by column (hexane: ethyl acetate = 1: 3-1: 5) to give N-(5-fluoro-2-methoxyphenyl) -2 – [[5- ( 4-hydroxy-3-methoxyphenyl) -4- (1H- pyrrol-1-yl) -4H-1,2,4- triazol-3-yl] thio] acetamide (30mg, 11%) a pale brown solid It was obtained as a.

The synthetic route of 1978-39-8 has been constantly updated, and we look forward to future research findings.

Synthetic Route of 126-38-5,Some common heterocyclic compound, 126-38-5, name is 1-Bromo-2,2-dimethoxypropane, molecular formula is C5H11BrO2, 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.

The compound 4,6-dimethoxypyrimidine-5-carboxamide (500 mg, 2.73 mmol) was suspended in1-bromo-2,2-dimethoxypropane (5 mL),The mixture was heated to 130 C and stirred for 1.5 hours. The reaction was monitored by thin-layer chromatography (PE / EtOAc, v / v, 2/1). After the reaction was completed, the reaction mixture was diluted with ethyl acetate (30 mL). The resulting mixture was washed with water (30 mL) and brine (30 mL), and the organic phase was dried over anhydrous sodium sulfate and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (PE / EtOAc (v / v) = 8/1) to give the title compound as a white solid (229 mg, 37.9%).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 1-Bromo-2,2-dimethoxypropane, its application will become more common.

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. 3616-56-6, name is 2,2-Diethoxy-N,N-dimethylethanamine, A new synthetic method of this compound is introduced below., Recommanded Product: 2,2-Diethoxy-N,N-dimethylethanamine

The mixture of homocoupling product 2i (0.5 mmol), NaOEt (340.25 mg, 5.0 mmol) and DMSO (1.0 mL) was added into a 35 ml pressure-resistant vial under air atmosphere. The mixture was heated to 120oC and stirred for 5h. After being cooled to ambient temperature, the reaction mixture was diluted with EtOAc (60 mL) and washed with H2O (2×30 mL). The aqueous phase was extracted with EtOAc (2×30 mL), and the combined organic phase was dried over anhydrous Na2SO4, filtered and concentrated under the reduced pressure. The residue was purified by silica gel column directly to give the product 3i (Yield 82%). The spectra of 3i were in accordance with those reported in the literature3. Then 16.1mg (1.0 mmol) (dimethylamino)acetaldehyde diethyl acetal was added in the refluxing mixture of 30 mg (0.10 mmol) biindole 3i with the 3ml of AcOH solvent. The resulting mixture was refluxed for 2 h, then cooled to room temperature, and concentrated under reduced pressure. The residue was purified by silica gel chromatography to give tjipanazole D (4i) with 65% yield (21.1 mg). The spectra of 4i were in accordance with those reported in the literature3,4,5.

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 of 36805-97-7,Some common heterocyclic compound, 36805-97-7, name is 1,1-Di-tert-butoxy-N,N-dimethylmethanamine, molecular formula is C11H25NO2, 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.

2,6-Dichloro-isonicotinic acid (11.2 g, 57.1 mmol) is suspended in toluene (150 mL) at 800C and then treated with N,N-dimethylformamide di-tert.-butyl acetal (50 mL, 209 mmol).The dark mixture is stirred at 800C for 12 h, then at rt for 16 h. The dark solution is diluted with diethyl ether (400 mL), washed with sat. aq. NaHCO3 solution (3×100 mL), dried overNa2SO4, filtered and concentrated. The crude product is purified by MPLC on silica gel eluting with heptane:ethyl acetate to give 2,6-dichloro-isonicotinic acid tert. -butyl ester (14.2 g) as a brownish oil which slowly solidifies; LC-MS: tR = 1.05 min; 1H NMR (D6-DMSO): £1.56 (s, 9 H), 7.85 (s, 2 H).

The synthetic route of 36805-97-7 has been constantly updated, and we look forward to future research findings.

Electric Literature of 20781-20-8, These common heterocyclic compound, 20781-20-8, name is (2,4-Dimethoxyphenyl)methanamine, 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.

To a solution of compound 58 (6.6 g, 33.5 mmol) in dichloromethane (100 mL)were added DIPEA (8.65 g, 67 mmol), HOBt (5.4 g, 36.85 mmol) and EDCI (9.6 g, 50.3mmol). After about 15 mm stirring, to the homogeneous reaction mixture was added asolution of 2,4-dimethoxybenzyl amine (5.6 g, 33.5 mmol) in dichloromethane (50 mL)dropwise under nitrogen atmosphere. The resulting mixture was stirred under nitrogenatmosphere at room temperature for 16h. The reaction mixture was washed successively with iN NaOH (100 mL), water (100 mL) and brine (100 mL). The organic phase was then dried over Na2SO4 and evaporated to give a crude solid product 59 that crystallized from ethyl ether. Filtration and open air suction drying afforded an off-white solid pureproduct 9.8g (96%), (MS: [M+1] = 347).

Statistics shows that (2,4-Dimethoxyphenyl)methanamine is playing an increasingly important role. we look forward to future research findings about 20781-20-8.

Electric Literature of 578-57-4, These common heterocyclic compound, 578-57-4, name is 1-Bromo-2-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.

General procedure: To a solution of brominated aromatic compounds (1 equiv),bis(pinacolate)diboron (1.5 equiv) and anhydrous ethanol (15 mL)were added10%palladium-carbon (0.01 equiv), followed by potassium acetate (3 equiv) under argon. The mixture was heated in a 60 C with stirring for the indicated time. Thereactor was cooled to room temperature, and the reaction mixture was filtered, and thefiltrate was concentrated under reduced pressure. The residue was extracted with dichloromethane (20 mL×3), and organic layer was washed with water (20 mL×2)and once with brine (25 mL), dried over magnesium sulfate and concentrated in vacuo.The product was purified by silica gel flash chromatography on silica gel usingpetroleum as eluent.

The synthetic route of 578-57-4 has been constantly updated, and we look forward to future research findings.

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. 116557-46-1, name is 3-Bromo-2-methoxyaniline, This compound has unique chemical properties. The synthetic route is as follows., Recommanded Product: 3-Bromo-2-methoxyaniline

[00238j To a reaction vial charged with 3-bromo-2-methoxyaniline (1.12 g, 5.54mmol), 1 -methyl-4-(4,4,5 ,5 -tetramethyl- 1,3 ,2-dioxaborolan-2-yl)- 1 H-pyrazole (1.499 g,7.21 mmol) in dioxane (6 mL) was added aqueous potassium phosphate (2.0 M) (5.54 ml,11.09 mmol). The resulting mixture was deoxygenated by bubbling argon through themixture for 5 minutes. [1,1 ?-Bis(diphenylphosphino)ferrocene] dichloropalladium(II)(PdC12(dppf), 0.122 g, 0.166 mmol) was then added and the mixture was heated at 110 Cfor 2 hours. The reaction was cooled, diluted with ethyl acetate (200 mL), washed with water, brine, dried over anhydrous sodium sulfate, filtered and concentrated to afford tan oil as the crude product mixture. This material was purified by silica gel flash chromatography using hexanes/ethyl acetate mixtures as the eluent. Fractions containingthe desired product were collected, combined, and concentrated under vacuum to afford0.87 g (77%) of the desired product as an oil which solidified upon standing. HPLC (Method N) = 0.89 minutes. LCMS MH+ 204.1.

According to the analysis of related databases, 116557-46-1, the application of this compound in the production field has become more and more popular.

Application of 16452-01-0, A common heterocyclic compound, 16452-01-0, name is 3-Methoxy-4-methylaniline, molecular formula is C8H11NO, 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 threaded ACE glass pressure tube with a sealed Teflon screw cap equipped with a magnetic stirring bar, a mixture of 11a (0.200 g, 1.65 mmol), 12a (0.185 g, 1.65 mmol), p-TsOH (0.028 g, 0.16 mmol), and MS 4A (0.20 g) in toluene (10 mL) was stirred and heated at 130 C for 4.5 h under microwave irradiation (100 W). The solvent was removed under vacuum and the residue purified by column chromatography (silica gel, hexane-EtOAc, 98:2) to give 7a (0.32 g, 91%) as a brownish oil; Rf = 0.75 (hexane-EtOAc, 7:3).

The synthetic route of 16452-01-0 has been constantly updated, and we look forward to future research findings.

2132-62-9, name is 1,2-Bis(4-methoxyphenyl)ethyne, 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. HPLC of Formula: C16H14O2

take 1,2-dicarbonylmethyl ester-Indolizine 46.6mg (corresponding to 0.20 mmol), 71.5 mg (equivalent to 0.30 mmol) of 1,2-bis(4-methoxyphenyl) acetylene, 4.5 mg of palladium acetate (equivalent to 0.02 mmol), Potassium acetate was 5.0 mg (equivalent to 0.01 mmol), 1.5 ml of dimethylsulfoxide and then stirred under heating at 130 C for 1 hours under 1 atmosphere of oxygen and separated to obtain the sixth number target Product 78.9 mg (yield 84%).

The synthetic route of 2132-62-9 has been constantly updated, and we look forward to future research findings.

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. 59557-91-4, name is 4-Bromo-2-methoxyaniline belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Quality Control of 4-Bromo-2-methoxyaniline

At room temperature, concentrated sulfuric acid (185 mL) and deionized water (144 mL) were added with mechanical stirring in a three-necked flask.Glycerol (768.5 mmol, 207.5 g) was added and the temperature was lowered to room temperature. Sodium 3-nitrobenzenesulfonate (733 mmol, 165 g) was added in portions and the reaction was carried out at 80 C for 3 hours, 4-bromo-2-methoxyaniline (compound shown by the formula (I-1)) (495 mmol, 100.0 g) was added portionwise with vigorous stirring to giveHeat to 120 C and react overnight. Add water (600 mL) and adjust pH to approx. 7.0 with concentrated aqueous ammonia. Extract with water and ethyl acetateAfter the extraction, the organic phase was dried over anhydrous sodium sulfate, filtered, and the solvent was spinned to give 103 g of tan by column chromatographyThe oily product (compound represented by the formula (I)) had a yield of 87.4% and a purity of 94%.

The synthetic route of 59557-91-4 has been constantly updated, and we look forward to future research findings.