Category: 64248-64-2

Synthetic Route of 64248-64-2, The chemical industry reduces the impact on the environment during synthesis 64248-64-2, name is 2,5-Difluorobenzonitrile, I believe this compound will play a more active role in future production and life.

Step A: 5-Fluoro-2-hydroxybenzonitrile (23t): 2,5-Difluorobenzonitrile (14.9 g, 107 mmol) and benzyl alcohol (11.1 mL, 11.6 g, 107 mmol) were dissolved in DMF (330 mL) and cooled to 0 C. Sodium hydride (60% in oil, 6.40 g, 161 mmol) was added to the solution at 0 C. and the reaction mixture was allowed to warm to room temperature. After stirring for 1 hour at room temperature, the reaction solution was cooled to 0 C. and water (330 mL) was gradually added to the solution. The mixture was transferred to a separatory funnel and extracted three times with 500 mL of Et2O. The combined organic layer was washed twice with 100 mL of water, brine once, then dried over MgSO4. After filtration, the solution was concentrated under reduced pressure to obtain a crude pale yellow solid. The crude solid was dissolved in MeOH (500 mL). To the solution was added 10% palladium on activated carbon under a nitrogen atmosphere. Replacing nitrogen gas with hydrogen gas, reaction mixture was stirred at room temperature (if the reaction did not proceed in 30 minutes, the Pd/C was filtered off and the reaction was set up again). After 2 hours of stirring, the palladium on carbon was filtrated off and washed with MeOH. The solution was concentrated under reduced pressure to obtain a pale yellow solid. The solid was recrystallized from hot toluene (100 mL) by addition of hexane (10 mL) followed by cooling to 0 C. The obtained white needles were washed with 1:1 mixture of toluene and hexane (7.23 g, 49% yield). Mother liquor was concentrated and purified on silica gel with Et2O/hexane (2:3-1:1) to afford the desired compound (23t) (6.94 g, 47% yield). Total 14.2 g (96% yield) over 2 steps. 1H-NMR (400 MHz, d6-DMSO) delta 11.09 (s, 1H), 7.58 (dd, J=8.4, 3.2 Hz, 1H), 7.40 (td, J=8.6, 3.2 Hz, 1H), 7.03 (dd, J=9.2,4.4 Hz, 1H) ppm.

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, 2,5-Difluorobenzonitrile, other downstream synthetic routes, hurry up and to see.

Electric Literature of 64248-64-2, The chemical industry reduces the impact on the environment during synthesis 64248-64-2, name is 2,5-Difluorobenzonitrile, I believe this compound will play a more active role in future production and life.

In a 3 L5 4-necked flask that had been evacuated and back-filled with argon, 2,5- difluorobenzonitrile (295.3 ml, 812.0 mmol) and 4-amino-3-methylphenol (100.0 g, 812.0 mmol) were dissolved in dry DMSO (2.75 M) with rapid stirring at room temperature. The solution was evacuated/backfilled with argon (3x). Potassium carbonate (185.2 g, 1340 mmol) (-325 mesh) was added. The reaction mixture was evacuated/backfilled with argon (3x) and warmed to 80 0C (internal probe) for 16 hours. TLC indicated complete conversion. The reaction mixture was cooled to room temperature and poured slowly into 2 L of ice water with rapid stirring. The residue in the round bottom flask was taken up in water repeatedly and poured into the ice water until a total volume of 3 L was achieved and all solids were in the ice water. The suspension was stirred rapidly for 2 hours as it came to room temperature. The brown solids were collected by filtration, washed with water (3 L), air dried, dried with latex dam, and dried under high vacuum at 40 0C for 44 hours to provide 194 g (99 %) of the desired product as a tan solid. MS (APCI +) m/z 243 (M+l) was detected. 1H NMR (400 MHz5 CDCl3) delta 7.38 (m, IH), 7.18 (m5 IH), 6.65-6.85 (m, 5H), 3.60 (br, 2H), 2.17 (s, 3H).

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, 2,5-Difluorobenzonitrile, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ARRAY BIOPHARMA INC.; GRONEBERG, Robert; BURGESS, Laurence, E.; HARVEY, Darren; LAIRD, Ellen; MUNSON, Mark; RIZZI, James; RODRIGUEZ, Martha; EARY, Charles, Todd; WATSON, Daniel; WO2007/89646; (2007); A1;,
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Synthetic Route of 64248-64-2, These common heterocyclic compound, 64248-64-2, name is 2,5-Difluorobenzonitrile, 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 mixture of benzonitrile 1 (10.0 mmol) and methylhydrazine (2.8 mL, 50.0 mmol) in EtOH (10.0 mL) was heated to reflux overnight. The mixture was cooled to rt and then concentrated. H2O (10.0 mL) and EtOAc (20.0 mL) were added to the residue. The organic layer was washed with H2O (10.0 mL), brine (10.0 mL), dried over Na2SO4, filtered, and concentrated in vacuo. The residue was subjected to silica-gel chromatography by using EtOAc/hexanes (1:1) as eluent to give the product 2.

Statistics shows that 2,5-Difluorobenzonitrile is playing an increasingly important role. we look forward to future research findings about 64248-64-2.

Reference:
Article; Liu, Han-Jun; Hung, Shiang-Fu; Chen, Chuan-Lin; Lin, Mei-Huey; Tetrahedron; vol. 69; 19; (2013); p. 3907 – 3912;,
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Related Products of 64248-64-2, The chemical industry reduces the impact on the environment during synthesis 64248-64-2, name is 2,5-Difluorobenzonitrile, I believe this compound will play a more active role in future production and life.

(i) Preparation of 2-(3-trifluoromethylphenoxy)-5-fluorobenzonitrile To a solution of 3-trifluoromethylphenol (29 g, 0.18 mol) dissolved in dimethylformamide (100 ml) was added finely-powdered potassium hydroxide (15 g, 0.19 mol). The reaction mixture was heated to approximately 60 C., with stirring, for one hour after which time 2,5-difluorobenzonitrile (25 g, 0.19 mol) was added and the temperature increased to 110 C. After approximately half an hour, the reaction mixture was allowed to cool and excess dimethylformamide was removed in vacuo before 500 ml of a 50:50 mixture of water and trichloromethane was added. The organic layer was separated, washed and dried and the residue purified by chromatography using a silica column with trichloromethane as eluant, followed by distillation and recrystallisation to yield the title compound as a solid. Melting point: 51 C. Analysis (%) Calc. C: 59.8; H: 2.5; N: 5.0 Found C: 59.8; H: 2.7; N: 5.2

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, 2,5-Difluorobenzonitrile, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Shell Research Limited; US5304532; (1994); A;,
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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 64248-64-2 as follows. COA of Formula: C7H3F2N

General procedure: The starting material 1 (7.0 mmol) was dissolved in 40 mL DMSO, and the mixture was heated and kept at 75 C for 20 min under stirring. After that sodium sulfide nonahydrate (10.5 mmol) was added to the solution in batch and the reaction continued under 75 C for 2 h. The reaction was then monitored by TLC and cooled to room temperature. The crude product was further extracted three times by using water and ethyl acetate. The aqueous layer was then adjusted by hydrochloric acid to a pH value of 3-4. Enough water was added and intermediate 2 precipitated out subsequently. The resulting solid 2 was filtered out in 75%-90% yields (Some of them were hard to purify and were used directly for the next reaction). Characterizations for 2 were listed in Table S2.

According to the analysis of related databases, 64248-64-2, the application of this compound in the production field has become more and more popular.

Reference:
Article; Wu, Ren-Jun; Zhou, Kai-Xuan; Yang, Haijin; Song, Guo-Qing; Li, Yong-Hong; Fu, Jia-Xin; Zhang, Xiao; Yu, Shu-Jing; Wang, Li-Zhong; Xiong, Li-Xia; Niu, Cong-Wei; Song, Fu-Hang; Yang, Haitao; Wang, Jian-Guo; European Journal of Medicinal Chemistry; vol. 167; (2019); p. 472 – 484;,
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Reference of 64248-64-2, 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. 64248-64-2, name is 2,5-Difluorobenzonitrile belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

Reference Example 69 2-(2-Cyano-4-fluorophenoxy)ethylpiperazine Under nitrogen atmosphere, potassium tert-butoxide (869 mg) was added to a tetrahydrofuran solution (10 ml) of benzyl 4- (2-hydroxyethyl)-1-piperazinecarboxylate (1.86 g) in an ice bath. After stirring for one hour, the reaction system was transferred to a dry ice-methanol bath, and after 10 minutes, a 2,5-difluorobenzonitrile (1.09 g)/tetrahydrofuran solution (5 ml) was added thereto. After stirring for 2 hours while the temperature of the reaction system was naturally returned to a room temperature, an aqueous saturated ammonium chloride and diethyl ether were added thereto, to separate the organic layer. The resulting organic layer was washed with water and brine, and dried over anhydrous magnesium sulfate. After filtering off the drying agent, the filtrate was evaporated. The residue was purified by silica gel column chromatography (hexane: ethyl acetate system), to give a colorless oil as an intermediate (1.10 g, 46%). The intermediate (1.10 g) was dissolved in methanol (10 mL), 10% palladium carbon (100 mg) was added, andthe mixture was stirred at room temperature under hydrogen atmosphere. After 1.5 hours, the reaction catalyst was filtered through Celite, and the filtrate was evaporated. The resulting title compound (647 mg, 80%) obtained was used for the next reaction as it was. Free body; 1H-NMR (400MHz, CDCl3) delta 2.55-2.63 (m, 4H), 2.87 (t, J = 5.7Hz, 2H), 2.89-2.92 (m, 4H), 4.19 (t, J = 5.7Hz, 2H), 6.93 (dd, J = 4Hz, 8.8Hz, 1H), 7.21-7.29 (m, 2H).

The synthetic route of 2,5-Difluorobenzonitrile has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Eisai Co., Ltd.; EP1254895; (2002); A1;,
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Nitriles – Chemistry LibreTexts

Synthetic Route of 64248-64-2,Some common heterocyclic compound, 64248-64-2, name is 2,5-Difluorobenzonitrile, molecular formula is C7H3F2N, 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.

Step A: Thio-Amide Synthesis:1-1 1 -2A stirred solution of the appropriate benzonitrile e.g., 2,5-difluorobenzonitrile (1-1), (15 mmol) in pyridine (10 rnL) was treated with sulfide (20% wt solution in water, 16.5 mmol) and triethyl amine (16.5 mmol). The reaction mixture was stirred at 500C for 5 hr until the reaction was complete. After cooling to RT, the mixture was diluted with cold water. Extracted with EtOAc, and the organics separated, then washed with H2O (x3), sat. brine (x3), then dried (Na2SO4), filtered, and evaporated under reduced pressure to give the crude. Purification on silica gel column (20% ethyl acetate/hexane) to afford thio-amide as yellow solid, 1-2 (yield 88.5%). 1H NMR (300 MHz, CDCl3): delta 7.12 (m, 2 H), 7.90 (br, 2 H), 8.08 (m, 1 H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2,5-Difluorobenzonitrile, its application will become more common.

Reference:
Patent; NOVARTIS AG; WO2008/63912; (2008); A1;,
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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. 64248-64-2, name is 2,5-Difluorobenzonitrile, A new synthetic method of this compound is introduced below., Product Details of 64248-64-2

Example 41 5-Fluoro-2-(2-methyl-4-pyrrolidin-1-yl-quinolin-7-ylmethoxy)-benzonitrile The title compound was produced in accordance with the general method of example 6 from (2-methyl-4-pyrrolidin-1-yl-quinolin-7-yl)-methanol (example 2) and 2,5-difluorobenzonitrile. Light yellow solid, ISP-MS: m/e=362.3 ([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.

Reference:
Patent; Klug, Michael G.; Mattei, Patrizio; Mueller, Werner; Neidhart, Werner; Nettekoven, Matthias Heinrich; Pflieger, Philippe; Plancher, Jean-Marc; US2003/158179; (2003); A1;,
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Reference of 64248-64-2, 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. 64248-64-2 name is 2,5-Difluorobenzonitrile, 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.

To a solution of (lR,3s,5S)-tert-butyl 3-((lr,4R)-4-hydroxycyclohexyloxy)-8- azabicyclo[3.2.1]octane-8-carboxylate (33 mg, 0.101 mmol) and 2,5-difluorobenzonitrile (18 mg, 0.129 mmol) in 0.5 mL THF, 1 M potassium teri-butoxide (0.150 mL, 0.150 mmol) was added slowly. After stirring at room temperature for 1 h, mixture was extracted with water and CH2C12. Organic phases were concentrated and residue was purified by HPLC (H20/CH3CN gradient + 0.1% TFA). Fractions containing product were partly concentrated and residue was extracted with 1 M NaOH and CH2C12. Organic phases were dried over MgS04, filtered, and concentrated to give (lR,3s,5S)-tert-butyl 3-((lr,4R)-4-(2-cyano-4-fluorophenoxy)cyclohexyloxy)-8- azabicyclo[3.2.1]octane-8-carboxylate (37.9 mg, 85.26 muiotaetaomicron?, 84.1%) as a white solid. Exact mass calculated for C25H33FN204: 444.2, found: LCMS m/z = 445.6 [M+H]+; lU NMR (400 MHz, CDC13) 5 ppm 1.41-1.69 (m, 8H), 1.47 (s, 9H), 1.87-2.10 (m, 8H), 3.50-3.56 (m, 1H), 3.77-3.85 (m, 1H), 4.16-4.31 (m, 2H), 4.33-4.39 (m, 1H), 6.92-7.00 (m, 1H), 7.20-7.26 (m, 2.4 Hz, 2H).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2,5-Difluorobenzonitrile, and friends who are interested can also refer to it.

Reference:
Patent; ARENA PHARMACEUTICALS, INC.; JONES, Robert M.; BUZARD, Daniel J.; HAN, Sangdon; KIM, Sun Hee; LEHMANN, Juerg; ZHU, Xiuwen; WO2013/55910; (2013); A1;,
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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. 64248-64-2, name is 2,5-Difluorobenzonitrile, This compound has unique chemical properties. The synthetic route is as follows., SDS of cas: 64248-64-2

EXAMPLE 23 (7RS,9aSR)-7-(4-Fluorophenoxy)methyl-2-(2-cyano-4-fluorophenyl)-2,3,4,6,7,8,9,9a-octahydro-1H-pyrido[1,2-a]pyrazine STR38 A mixture of 1.05 g (6.17 mmol) of (7RS,9aSR)-7-hydroxymethyl-2,3,4,6,7,8,9,9a-octahydro-1H-pyrido[1,2-a]pyrazine (U.S. Pat. No. 5,326,874) and 1.29 g (9.25 mmol) of 2,5-difluorobenzonitrile in 20 mL of DMSO was heated at 100 C. for 16 h. The mixture was cooled to room temperature, acidified with 1M HCl, washed with ether (3*), made basic with conc. ammonium hydroxide, and extracted with ethyl acetate (3*). The combined organic layers were washed with water (3*), dried (magnesium sulfate), filtered and evaporated. Purification by silica gel MPLC with 90:10 chloroform:methanol gave 0.51 g of (7RS,9aSR)-7-hydroxymethyl-2-(2-cyano-4-fluorophenyl)-2,3,4,6,7,8,9,9a-octahydro-1H-pyrido[1,2-a]pyrazine.

According to the analysis of related databases, 64248-64-2, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Pfizer Inc.; US5852031; (1998); A;,
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts