Category: nitriles-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. 939-80-0, name is 4-Chloro-3-nitrobenzonitrile belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Product Details of 939-80-0

[00200] 4-(2,5-Difluorophenoxy)-3-nitrobenzonitrile 21. A solution of 4-chloro-3- nitrobenzonitrile (5 g) in THF (200 mL) at room temperature was treated with K2CO3 (19 g), followed by 2,5-difluorophenol (3.7 g). After stirring at room temperature for 18 hrs, the solid was filtered off and rinsed with copious amounts of EtOAc. The filtrate was washed sequentially with saturated aqueous NaHCU3 solution, water, and saturated aqueous NaCl solution, dried over anhydrous Na2SO4, filtered, and concentrated in vacuo. The residual was triturated with hexanes and collected by suction to furnish the desired product 21, which was used directly in the next step without further purification.

The synthetic route of 939-80-0 has been constantly updated, and we look forward to future research findings.

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. 6393-40-4, name is 4-Amino-3-nitrobenzonitrile, A new synthetic method of this compound is introduced below., Formula: C7H5N3O2

A mixture of 4-amino-3-nitrobenzonitrile (63.3 g, 388 mmol) in 1,4-dioxane (600 mL) and anhydrous ethanol (600 mL) was cooled in an ice water bath to 0-5 C and treated with gaseous HCl for 1.5 h. The reaction mixture was tightly sealed and allowed to warm up to room temperature with stirring for 18 h. The flask was then carefully unsealed and the reaction mixture was diluted with anhydrous diethyl ether (about 2.4 L) until a cloudy solution was obtained. A minimum amount of absolute ethanol required to give a clear solution was then added, and the resulting solution stirred until crystals of 4-amino-3-nitro- benzimidic acid ethyl ester were observed. Ether was then cautiously added to complete the crystallization process and the suspension was allowed to stand for about 30 minutes. The crystals were filtered and washed with dry diethyl ether, then allowed to dry under aspirator vacuum. The crystals were dried in vacuo to give 4-amino-3-nitro-benzimidic acid ethyl ester hydrochloride (84.6 g) as off-white crystals.

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.

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. 1558-82-3, name is Ethyl N-cyanoacetimidate, This compound has unique chemical properties. The synthetic route is as follows., Recommanded Product: Ethyl N-cyanoacetimidate

A mixture of 1.2 g (0.004 mol) of 2-chloro-4,5,6,7-tetrahydrothiazole [5,4-c] pyridine trifluoroacetate,0.67 g (0.006 mol)N-cyanoethyl esterWas added to a reaction flask equipped with 30 ml of methanol,0.73 g (0.0048 mol) of DBU was added,Heating to reflux reaction,After 2 hours the TLC monitoring reaction was complete,Cooling white solid precipitation, the filter that white solid 0.49g,

According to the analysis of related databases, 1558-82-3, the application of this compound in the production field has become more and more popular.

Application of 17417-09-3, A common heterocyclic compound, 17417-09-3, name is 2-Fluoro-5-nitrobenzonitrile, molecular formula is C7H3FN2O2, 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 2(H)-1,2,3-triazole (0.913 g, 13.24 mmol) in DMF (15 mL) was added portionwise sodium hydride (60% suspension in mineral oil, 0.530 g, 13.24 mmol) at rt and then stirred the mixture for 1H at room temperature. The reaction mixture was then cooled back down to OeC, and a solution of 2-fluoro-5-nitrobenzonitrile (2.0 g, 12.04 mmol) in DMF (10 mL) was added dropwise. The resulting mixture was stirred for 1.5 h at OeC and then at RT for 1.5 h. The mixture was quenched with ice cooled water and extracted with EtOAc (2/150 mL). The combined organic layers were washed with water (2/1,50 mL), brine (50 mL), dried (Na2SC>4) and filtered. The filtrate was rotary evaporated to leave a crude which was purified by flash column chromatography (silica gel, 20-30% EtOAc in hexanes as eluent) to give 5-nitro-2-(2H-1,2,3-triazol-2-yl)benzonitrile (1.2 g, 46.3% yield) & 5-nitro-2-(1H-1,2,3-triazol-1-yl)benzonitrile (0.7 g, 27.0% yield). 5-nitro-2-(2H-1,2,3-triazol-2-yl)benzonitrile: 1HNMR (400 MHz, DMSO-d6) ||8.93 (d, J = 2.5 Hz, 1H), 8.68 (dd, J = 8.5, 2.5 Hz, 1H), 8.44 (s, 2H), 8.40 (d, J = 8.5 Hz, 1H). ESI-MS (m/z) 216.04 (MH)+. 5-nitro-2-(1H-1,2,3-triazol-1-yl)benzonitrile: 1HNMR (400 MHz, DMSO-d6) ||9.05 (d, J = 2.5 Hz, 1H), 8.95 (d, J = 1.3 Hz, 1H), 8.75 (dd, J = 8.5, 2.5 Hz, 1H), 8.20 (d,J = 8.5 Hz, 1H), 8.15 (d, J = 1.3 Hz, 1H); ESI-MS (m/ z) 216.00 (MH)+.

The synthetic route of 17417-09-3 has been constantly updated, and we look forward to future research findings.

Reference of 107-91-5, A common heterocyclic compound, 107-91-5, name is 2-Cyanoacetamide, molecular formula is C3H4N2O, 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: A substituted alkyl methyl ketone or cyclic ketone (1 equiv) and ethyl formate or ethyl acetic(1 equiv) was added dropwise to absolute ether solution of sodium metal (1 equiv) for 1 h whilemaintained below 20 C. After the addition, the reaction was allowed to stir in an ice bath untilthe sodium metal had disappeared. The precipitate was filtered, washed with absolute ether anddried to give the corresponding compound which was directly used for the next step without further purification. To a solution of previous product (1 equiv), and cyanoacetamide (1.05 equiv) in water was stirred6 min at room temperature. The mixture was added dropwise piperidine acetate solution (0.3 equiv),which was prepared from piperidine (1 equiv), acetic acid (1 equiv) and water (5 equiv). The solutionwas heated to reflux for 2 h. Then, the reactor was cooled to room temperature, and adjusted to pH 4 by 4 N hydrochloric acid. The resulting solid was filtered, respectively washed with water and ether,and dried to give the corresponding compound which was purified by recrystallizing using menthol as solvent. 4,6-Dimethyl-2-oxo-1,2-dihydropyridine-3-carbonitrile (1a): 58% yield, white solid, m.p. 264-266 C(lit. [24] 294 C), 1H-NMR (DMSO-d6, 600 MHz): delta 12.31 (br, 1H), 6.16 (s, 1H), 2.30 (s, 3H), 2.22 (s, 3H).

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 159847-83-3, The chemical industry reduces the impact on the environment during synthesis 159847-83-3, name is Methyl 2-amino-4-cyanobenzoate, I believe this compound will play a more active role in future production and life.

To a solution of 7-ethoxy-2,3-dihydro-2,2-dimethyl-a-(1-methylethyl)-5-benzofuranmethanol (11.3 g, 42.9 mmol) and methyl 2-amino-4-cyanobenzoate (6.30 g, 35.8 mmol) in toluene (40 ml) and acetic acid (25 ml) was added conc. sulfuric acid (5.92 ml, 111 mmol) under ice-cooling, and the mixture was stirred for 2 hours at 80C. Methanol (18 ml) was added dropwise thereto, and the mixture was stirred for 30 minutes at 65C. After cooling, the reaction mixture was combined with ice water, neutralized with sodium hydrogen carbonate, and extracted three times with ethyl acetate. The combined organic layer was extracted three times with 1 M hydrochloric acid, and the combined aqueous layer was neutralized with sodium hydrogen carbonate, and extracted twice with ethyl acetate. The combined organic layer was washed with a saturated aqueous solution of sodium chloride, dried over sodium sulfate, filtered, and concentrated under reduced pressure. To the residue was added ethyl acetate, and the precipitated crystals were removed. The mother liquor was concentrated under reduced pressure, and the residue was purified with a basic silica gel column chromatography (hexane/ethyl acetate, 5:1 followed by 3:1) to give the title compound (7.33 g, yield 49%). Amorphous. 1H NMR (CDCl3) delta 1.24 (6H, s), 1.33 (6H, s), 1.46 (3H, t, J = 7.0 Hz), 2.36 (2H, s), 2.66 (2H, s), 3.89 (3H, s), 4.18 (2H, q, J = 7.0 Hz), 5.76 (2H, s), 6.59 (1H, s), 6.62 (1H, dd, J = 7.8, 1.5 Hz), 6.73 (1H, d, J = 1.5 Hz), 7.85 (1H, d, J = 7.8 Hz).

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, Methyl 2-amino-4-cyanobenzoate, other downstream synthetic routes, hurry up and to see.

Electric Literature of 39581-21-0, 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. 39581-21-0, name is N-Butyl-2-cyano-acetamide belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

General procedure: A mixture of N-alkyl-2-cyano-acetamides 1a-c (2 mmol), aldehydes 2a-f (2 mmol),malononitrile (3) (2 mmol), K2CO3 (2 mmol), and EtOH (2 mL) in a 10 mL septum-capped microwavevials was irradiated under microwave conditions at 90 C, 500 W, 200 rpm, for 10-15 min. Aftercompletion of the reaction, as indicated by TLC, each vial was de-capped and the contents were left tocool to room temperature. Then, the reaction mixture was worked up as described in method I to givecompounds 4a-q. Analytical samples were obtained by recrystallization from MeOH.

The synthetic route of N-Butyl-2-cyano-acetamide has been constantly updated, and we look forward to future research findings.

Adding a certain compound to certain chemical reactions, such as: 53078-71-0, name is 4-Methoxy-3-methylbenzonitrile, belongs to nitriles-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 53078-71-0, COA of Formula: C9H9NO

REFERENTIAL EXAMPLE 14 To 9.8 g of 4-methoxy-3-methylbenzonitrile, were added 150 ml of carbon tetrachloride, 10 g of NBS, and 0.4 g of BPO. The mixture was heated under reflux for 2.5 hours. The reaction mixture was cooled in ice, filtered from insolubles and concentrated under reduced pressure. The residue was admixed with n-hexane, stirred for 30 minutes, and collected by filtration to yield 9 g of 3-bromomethyl-4-methoxybenzonitrile; m.p. 102-103 C.

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

Adding a certain compound to certain chemical reactions, such as: 17417-09-3, name is 2-Fluoro-5-nitrobenzonitrile, belongs to nitriles-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 17417-09-3, Computed Properties of C7H3FN2O2

Under room temperature, into the 3-amino-4-fluorophenol (3 g, 22.42mmol) and 2-fluoro-5-nitrobenzonitrile (4.19 g, 24.66mmol) into DMF (20 mL) solution added K2CO3 (4.89g, 35.4mmol). The solution was stirred at 80C for 8h, and the solution was extracted with ethyl acetate, washed with saturated sodium chloride, drying with anhydrous sodium sulfate, filtering out insoluble matter, filter and concentrate under reduced pressure, the residue obtained was purified by silica gel column chromatography, (eluent: petroleum ether / ethyl acetate = 5:1 -4:1), and the resulting solution was concentrated under reduced pressure, obtained 1.95 g of a light yellow solid, yield is 35%.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2-Fluoro-5-nitrobenzonitrile, 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 7048-38-6 as follows. Recommanded Product: (5-Chloro-2-methoxyphenyl)acetonitrile

To a solution of 2-(5-chloro-2-methoxyphenyl)acetonitrile (lOg, 47.84mmol) in ethyl formate (50mL) was added sodium metal (4.4g, 95.6mmol) at room temperature. The resulting reaction mixture was heated at 100°C for 3 hours. After completion of the reaction, it was cooled to room temperature, water (100ml) and dichloromethane (100ml) were added to the reaction mixture and the solution was adjusted to pH-3 with the help of concentrated hydrochloric acid. The layers were separated and the aqueous layer was extracted with dichloromethane (2 x 100ml). The combined organics were washed with saturated aqueous sodium chloride solution (150ml), dried over sodium sulphate, filtered and evaporated in vacuo. The crude product was purified by column chromatography using normal phase silica gel. The desired product eluted at around 0.7 to 0.9percent methanol in dichloromethane. Evaporation of the product fractions gave 9g (yield, 77.94percent) of the desired compound as a white solid. LC-MS: m/z = 208.0(M-H).

According to the analysis of related databases, 7048-38-6, the application of this compound in the production field has become more and more popular.