Month: April 2021

Related Products of 6575-12-8, A common heterocyclic compound, 6575-12-8, name is 2,6-Dibromobenzonitrile, molecular formula is C7H3Br2N, 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.

Embodiment 14 (S,E)-3-(4-((2-Hydroxymethylpyrrolidin-1-yl)methyl)-3,5-dimethoxystyryl)b iphenyl-2-carbonitrile 14 Synthesis of compound 14-c Phenylboronic acid (363mg, 3mmol) and 2,6-dibromobenzonitrile (783mg, 3mmol) were dissolved in a mixed solvent of 1,4-dioxane (20mL) and water (4mL), followed by addition of [1,1′-bis(diphenylphosphino)ferrocene]palladium dichloride dichloromethane complex (171mg, 0.21mmol) and sodium carbonate (1.06g, 10mmol). After the reaction system was purged three times with nitrogen, the reaction solution was heated to 80C and stirred for 16 hours. Then the reaction solution was cooled to room temperature and evaporated under reduced pressure. The residue was purified by silica gel column chromatography (petroleum ether) to give compound 14-c (280mg, yield 36%).

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 3215-64-3, 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. 3215-64-3, name is 2-(2,6-Dichlorophenyl)acetonitrile belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

General procedure: A mixture of 15.3 g (100 mmol) of 2-(2,6difluorophenyl)acetonitrile, 152.5 g (70 mL, 812 mmol) of dibromoethane, and 32.7 g (144 mmol) of Et3BnN+Cl- was isolated from moisture and carbon dioxide and vigorously stirred at 60. A solution prepared from 95 g (1430 mmol, ?84.5%) of KOH and 95 mL of water was then added dropwise; the mixture was stirred during 6 h at 60-65C, and left overnight. On the next day, the reaction mixture was extracted with t-BuOMe (3×100 mL), the combined organic fractions were evaporated, and residual water was removed via azeotropic distillation with toluene. Then 60 mL of water and 40 mL of concentrated sulfuric acid were added to the obtained 1-(2,6-difluorophenyl)cyclopropanecarbonitrile, and the mixture was refluxed during 4 h. The reaction mass was cooled to ambient; the precipitate was filtered off and dried. Yield 17.82 g (90%), mp 156-157 (toluene).

The synthetic route of 2-(2,6-Dichlorophenyl)acetonitrile has been constantly updated, and we look forward to future research findings.

455-18-5, name is 4-(Trifluoromethyl)benzonitrile, belongs to nitriles-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. Formula: C8H4F3N

Step A (4-Trifluoromethylphenyl)thiocarboxamide To a stirred solution of 25.0 grams (0.146 mole) of 4-(trifluoromethyl)benzonitrile in 190 ml of pyridine was added 14.8 grams (0.146 mole) of triethylamine. During a two hour period, hydrogen sulfide gas was bubbled into the reaction mixture. The reaction mixture was stirred under a dry nitrogen atmosphere for 15 minutes and then was poured into ice-water. The aqueous mixture was extracted with three portions of diethyl ether. The organic extracts were combined and washed in succession with 10% hydrochloric acid, water, and an aqueous, saturated sodium chloride solution. The washed extract was dried over anhydrous sodium sulfate and was filtered. The filtrate was evaporated under reduced pressure to yield 28.3 grams of (4-trifluoromethylphenyl)thiocarboxamide as a solid.

The synthetic route of 455-18-5 has been constantly updated, and we look forward to future research findings.

Reference of 5332-06-9, The chemical industry reduces the impact on the environment during synthesis 5332-06-9, name is 4-Bromobutanenitrile, I believe this compound will play a more active role in future production and life.

Piperidine (3 equiv.) and toluene (5.5 volumes based on 4-bromobutanenitrile weight) were mixed and heated to 55-60 C. To this mixture, 4-bromobutanenitrile (1 equiv.) was added slowly while keeping temperature below 80 C. Note the addition is exothermic and the exotherm is addition-controlled. A white solid was observed to crystallize during the addition (piperidine hydrobromide). After complete addition, the reaction was stirred at 55-60 C. for an additional 1 hour. Progress of the reaction was monitored by 1H NMR in CDCl3 by sampling from the slurry, filtering, and evaporating solvent. After reaction is finished, the mixture was cooled to 10-20 C. and stirred for 1 hour. Solids were removed by filtration, and the cake washed with toluene (2×1.5 volumes based on 4-bromobutanenitrile weight). The combined filtrates were evaporated under vacuum (15-50 mmHg) at 40-50 C. until 120-200% of the theoretical weight was obtained. The solution was again filtered to remove remaining piperidine hydrobromide solids. The filtrate was then further evaporated under vacuum (15-50 mmHg) at 40-50 C. until no more solvent distilled. 1H NMR in CDCl3 was done to quantify residual amount of toluene for correction in next step and to verify that there was no residual piperidine present.

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

Application of 3759-28-2, 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. 3759-28-2, name is 2-(Cyanomethyl)benzonitrile, This compound has unique chemical properties. The synthetic route is as follows.

Sodium hydride (60%, 12.0g, 0.3mol) was added to tetrahydrofuran (150mL), cooled to 0 degrees in an ice water bath, and a solution of compound 18 (14.2g, 0.1mol) in tetrahydrofuran (50mL) was added dropwise. Stir for 1 hour. The reaction solution was cooled again to 0 degrees, CH3I (57.0g, 0.4mol) was added dropwise, stirred at room temperature overnight, poured into ice water (200mL) to quench, extracted with ethyl acetate (50mL x 2), the organic phase was dried over sodium sulfate concentrate. Methyl tert-butyl ether (20 mL) and petroleum ether (50 mL) were added, filtered with stirring, and dried in vacuo to give compound 19 as a yellow solid (13.8 g, yield 18.1%).

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

Adding a certain compound to certain chemical reactions, such as: 67515-59-7, name is 4-Fluoro-3-(trifluoromethyl)benzonitrile, 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 67515-59-7, SDS of cas: 67515-59-7

K2CO3 (2.0 eq.) and 2.0 equiv. of the corresponding nucleophile (Nu in scheme 16) were added to a solution of 4-fluoro-3-(trifluoromethyl)benzonitrile (1.0 eq.) in DMSO. The mixture was heated at 90 0C overnight. The mixture was cooled to r.t. and the solids were removed by filtration. Water was added to the filtrate and the product was precipitated, collected by filtration, washed with water and dried under vacuum.The following substances were synthesized following general procedure D for the nucleophilic aromatic substitution of 4-fluoro-3-(trifluoromethyl)-benzonitrile. The solvent system used for the purification, the yield and analytical data is given for each compound. Yield: 80%1H NMR (CDCl3) delta 7.92 (d, IH), 7.79 (m, IH), 7.33 (d, IH), 3.86 (m, 4H), 3.95 (m, 4H)

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Some common heterocyclic compound, 3598-13-8, name is 2-(4-Chlorophenoxy)acetonitrile, molecular formula is C8H6ClNO, 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 C8H6ClNO

Step 1 (5-methoxy-2-nitrophenyl)-acetonitrile 24.0 g (214 mmol) potassium-tert-butoxide in 100 mL DMF were slowly added dropwise to a solution of 13.2 g (86.0 mmol) 4-nitroanisole and 18.0 g (107 mmol) 4-chlorophenoxyacetonitrile in 50 mL DMF. The reaction mixture was stirred for 30 min at -10 C. and then poured into 300 g of a 1:1 mixture of conc. hydrochloric acid and ice. After extraction with EtOAc the organic phase was washed with water, dried and evaporated to dryness by rotary evaporation in vacuo with gentle heating. The residue was treated with a 1:1 mixture of petroleum ether/EtOAc and the product that crystallised out was suction filtered. After washing with a 1:1 mixture petroleum ether/EtOAc the crystals were dried in the air. Yield: 6.5 g (39% of theoretical) ESI-MS: m/z=210 (M+NH4)+

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 3598-13-8, its application will become more common.

These common heterocyclic compound, 17626-40-3, name is 3,4-Diaminobenzonitrile, 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. Quality Control of 3,4-Diaminobenzonitrile

A 0.03 mol% Lewis acid-base bifunctional catalyst I (where Rf = CF3; R1, R2, R3, R4, R5, R6 = F) was added to a 100 mL single-mouth flask.0.2 mol of 4-fluoro-benzaldehyde (R7=4-F-C6H4), 0.1 mol of p-cyano o-phenylenediamine (R9=CN; R8, R10, R11=H), 15 mL of toluene, reacting at 25C Stir for 5 hours,TLC followed the reaction until the reaction was complete. The reaction results showed that the yield of product II (R7=4-F-C6H4; R9=CN; R8, R10, R11=H) was 94%; after repeated use of the catalyst system for 10 times, the catalytic performance did not decrease.

The synthetic route of 3,4-Diaminobenzonitrile has been constantly updated, and we look forward to future research findings.

Adding a certain compound to certain chemical reactions, such as: 29509-06-6, name is 4-Methyl-3-oxopentanenitrile, 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 29509-06-6, COA of Formula: C6H9NO

General procedure: To the hydrazine either as free base or as a hydrochloride or a trifluoroacetic acid mono or di-salt (1 equiv) and the cyanoketone (from 1.0 to 1.5 equiv) in ethanol or toluene at RT is added DIPEA (from 0 to 2.0 equiv). Then the reaction mixture is heated at reflux until the reaction is finished. The reaction mixture is concentrated in vacuo to afford a crude mixture which is used as such or purified by flash chromatography on silica gel to afford the aminopyrazole as its free base.

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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. 1223434-15-8, name is Methyl 4-bromo-2-cyanobenzoate, A new synthetic method of this compound is introduced below., Formula: C9H6BrNO2

To a 50 mL round-bottorn flask was added (1 S,4S,5R)-5-[[3-(2,6-dichlorophenyl)-5-( 1-Huorocyclopropyl)-1 ,2-oxazol-4-yl]methoxy ]-2-azabicyclo[2.2.1 ]heptane 24d (120 mg,0.30 mmol, 1.0 equiv.), methyl4-bromo-2-cyanobenzoate (55 mg, 0.23 mmol, 1.0 equiv.),pota;;;sium carbonate (83 mg, 0.60 mmol, 2.0 equiv.), and DMSO (1 mL). The resultingrnix ture was stirred at ll 0C overnight After cooling to room temperature, the mixture Vas30 diluted ‘.vith of ethyl acetate and added with H20. The pH value of the solution ‘.Vas adjusted to 6 using a lM hydrogen chloride aqueous solution. The aqueous mixture was extracted withethyl acetate (1 00 mL x 2). l11e combined organic extracts were ·washed with brine (50 mL x4), dried over anhydrous sodium sulfate, and concentrated under vacuum. The residue waspurified by silica gel column chromatography eluting with ethyl acetate/petroleum ether (1 :3)5 to give methyl 2-cyano-4-[( l S,4S,5R)-5-UJ-(2,6-dichloropheny l)-5-(J -iluorocyclopropy l)L2-oxazol-4-yl]methoxy ]-2-azabicyclo[2.2.1]heptan-2-yl]benzoate 123a (90 mg, 54~~) as anoff-white solid.

The synthetic route of 1223434-15-8 has been constantly updated, and we look forward to future research findings.