Category: nitriles-buliding-blocks

Synthetic Route of 29509-06-6,Some common heterocyclic compound, 29509-06-6, name is 4-Methyl-3-oxopentanenitrile, molecular formula is C6H9NO, 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.

A solution of 4-methyl-3-oxo-pentanenitrile (Method 30; 0.42 g, 3. 78 mmol) and hydrazine monohydrate (0.183 ml, 3.78 mmol) inEtOH (20 ml) was heated to reflux for 1 hour, cooled, and then concentrated under reduced pressure. The resulted oil was dissolved with DCM, washed with brine, dried over anhydrousNa2S04, concentrated, and purification by column chromatography (EtOAc:MeOH = 20: 1) to the title compound as an orange solid (0.26 g,56%). 1H NMR (400 MHz,CDC13) 8 1.21-1. 23 (d, J= 7.0 Hz, 6 H), 2.82-2. 89 (q, 1 H), 5.42 (s, 1 H). MS: Calcd.: 125; Found:[M+H] + 126.

The synthetic route of 29509-06-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2005/49033; (2005); 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. 85068-32-2, name is 2-(3,5-Bis(trifluoromethyl)phenyl)acetonitrile, This compound has unique chemical properties. The synthetic route is as follows., SDS of cas: 85068-32-2

Lithium bis(trimethylsilyl)amide (4.9 ml, 1 .0 M in THF, 4.9 mmol) was added dropwise to a solution of [3,5-bis(trifluoromethyl)phenyl]acetonitrile (1 .00 g, 3.95 mmol) and 1 ,4- dibromobutane (700 mI, 5.9 mmol) in THF (25 ml) at OO and the mixture was stirred for 2 h at room temperature. Lithium bis(trimethylsilyl)amide (4.9 ml, 1.0 M in THF, 4.9 mmol) was added and the mixture was stirred over night at room temperature followed by 3 h at 600. For the work-up, the mixture was poured into brine, extracted with ethyl acetate (3x) and the combined organic phases were dried and concentrated. The residue was purified by flash chromatography (hexanes/ethyl acetate 95:5) to give the title compound 866 mg (68 % yield). 1 H-NMR (400 MHz, DMSO-afe): d [ppm] = 8.18 (s, 2H), 8.16 (s, 1 H), 2.60-2.52 (m, 2H), 2.23- 2.13 (m, 2H), 1 .98-1.86 (m, 4H).

Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand reaction routes of 85068-32-2.

Reference:
Patent; BAYER AKTIENGESELLSCHAFT; BAYER PHARMA AKTIENGESELLSCHAFT; GRAHAM, Keith; BUCHGRABER, Philipp; AIGUABELLA FONT, Nuria; WITTROCK, Sven; LANGE, Martin; BADER, Benjamin; PRECHTL, Stefan; LIENAU, Philip; KOPITZ, Charlotte, Christine; NOWAK-REPPEL, Katrin; POTZE, Lisette; (388 pag.)WO2020/48830; (2020); A1;,
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Related Products of 14447-18-8, The chemical industry reduces the impact on the environment during synthesis 14447-18-8, name is Benzyl cyanoacetate, I believe this compound will play a more active role in future production and life.

General procedure: A 100-mL round-bottom flask equipped with a stir bar is charged with dimethyl malonate (2.0 g, 15.0 mmol), crotonaldehyde (1.3 mL, 15.0 mmol), piperidine (0.2 mL, 3.0 mmol), benzoic acid (0.4 g, 3.0 mmol) and toluene (50 mL). The reaction mixture is heated at reflux using a Dean-Stark apparatus for 2 h. The toluene solution is washed with water, dried over Na2SO4 and concentrated in vacuo. The crude product is purified by silica gel column chromatography eluting with hexanes/ethyl acetate (20/1) to afford 1a (1.7 g, 60% yield) as a red liquid.

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, Benzyl cyanoacetate, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Zhang, Wei; Ghiviriga, Ion; Grenning, Alexander J.; Tetrahedron; vol. 73; 29; (2017); p. 4076 – 4083;,
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3441-01-8, name is 3-Cyanobenzamide, 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. Safety of 3-Cyanobenzamide

To a vial were added methyl l-(4-bromophenyl)-3- hydroxycyclobutanecarboxylate (335.8 mg, 1.178 mmol), 3-cyanobenzamide (258 mg, 1.77 mmol), copper(I) iodide (40.4 mg, 0.212 mmol), (lS,2S)-Nl,N2-dimethylcyclohexane-l,2- diamine (80 mg, 0.56 mmol), K2CO3 (331 mg, 2.39 mmol) and dioxane (6 mL). The mixture was evacuated and backfilled with N2 for 4 times, then heated at 120 °C for 17 h. The mixture was diluted with water and EtOAc. After extraction, the combined organic layers were washed with brine, dried over Na2S04i filtered and concentrated in vacuo to afford a residue, which was purified by column chromatography on silica gel (EtOAc in hexane : 0-100percent gradient) to afford the title compound. MS (EI) m/z 373 [M+Na]+.

The synthetic route of 3441-01-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; MERCK SHARP & DOHME CORP.; ZHOU, Hua; ACHAB, Abdelghani; FRADERA, Xavier; HAN, Yongxin; LI, Derun; MCGOWAN, Meredeth, A.; SCIAMMETTA, Nunzio; SLOMAN, David, L.; YU, Wensheng; (98 pag.)WO2019/27855; (2019); A1;,
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Application of 179898-34-1, 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. 179898-34-1, name is 3-Bromo-5-fluorobenzonitrile belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

Example 5A 3-Fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzenecarbonitrile Under argon, 3.60 g (18.0 mmol) of 3-bromo-5-fluorobenzenecarbonitrile, 5.03 g (19.8 mmol) of 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi-1,3,2-dioxaborolane and 5.30 g (54.0 mmol) of potassium acetate are provided in 72 ml of degassed 1,4-dioxane/DMSO (10/1), and 441 mg (0.54 mmol) of 1,1′-bis(diphenylphosphine)ferrocenedichloropalladium(II)/dichloromethane complex are added. The mixture is stirred at 90 C. overnight. Water is subsequently added, the phases are separated, the aqueous phase is extracted with ethyl acetate and the combined organic phases are concentrated. The crude product is purified by flash chromatography (mobile phase: cyclohexane/ethyl acetate 10:1). 4.48 g (92% of theory) of the title compound are obtained. 1H-NMR (400 MHz, DMSO-d6): delta=8.01 (ddd, 1H), 7.82 (s, 1H), 7.70 (ddd, 1H), 1.32 (s, 12H). GC-MS (Method 11): Rt=4.94 min; MS (EIpos): m/z=247 [M]+.

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-Bromo-5-fluorobenzonitrile, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; AiCuris GmbH & Co. KG; US2012/22123; (2012); A1;,
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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 5922-60-1 as follows. name: 2-Amino-5-chlorobenzonitrile

General procedure: 2-aminobenzonitrile (1mmol), and KCC-1/IL NPs (0.0007g) were added. The autoclave was closed, purged twice with CO2 gas, pressurized with 0.8MPa of CO2 and then heated at 70C for 60min. Then the reactor was cooled to ambient temperature, and the resulting mixture was transferred to a 50mL round bottom flask. Upon completion, the progress of the reaction was monitored by TLC when the reaction was completed, EtOH was added to the reaction mixture and the KCC-1/IL NPs were separated by distillation under vacuum. Then the solvent was removed from solution under reduced pressure and the resulting product purified by recrystallization using n-hexane/ethyl acetate.

According to the analysis of related databases, 5922-60-1, the application of this compound in the production field has become more and more popular.

Reference:
Article; Sadeghzadeh, Seyed Mohsen; Catalysis Communications; vol. 72; (2015); p. 91 – 96;,
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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. 610-66-2, name is 2-(2-Nitrophenyl)acetonitrile belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Quality Control of 2-(2-Nitrophenyl)acetonitrile

Absolute ethanol (2,250 ml) and 1,500 g (9.25 moles) of o-nitrophenylacetonitrile is charged into a 22 liter flask. The suspension is cooled to 5-10 and hydrogen chloride is bubbled into the mixture for 2.5 hours. The reaction mixture is stirred at 10 under nitrogen atmosphere overnight. It is then diluted with 16,000 ml of ether and stirred for 1 hour; the solid is collected by filtration, washed with 4*1,000 ml of ether and dried (5 mm Hg/40) to give ethyl 2-(o-nitrophenyl)-acetimidate hydrochloride, m.p. 122-123 (dec).

The synthetic route of 610-66-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Ciba-Geigy Corporation; US4595535; (1986); A;,
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Synthetic Route of 76469-88-0, 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. 76469-88-0 name is Methyl 4-(cyanomethyl)benzoate, 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.

A 100 mL flask was charged with methyl 4-(cyanomethyl)benzoate (1 g, 5.7 mmol), acetonitrile (46 mL), cesium carbonate (5.6 g, 17 mmol) and 1,2-dibromoethane (1.3 g, 5.8 mmol). The resulting suspension was stirred at 80C for three hours, cooled at room temperature and quenched with water (30 mL). The aqueous mixture was extracted with ethyl acetate (2 × 20 mL), the combined organic phases were washed with water (5 mL), brine (5 mL), dried with Na2SO4, filtered and evaporated. Purification by chromatography over silica gel (cyclohexane/ethyl acetate gradient, 1:01:1) affords methyl 4-(1-cyanocyclopropyl)benzoate. (0527) 1H-NMR (400 MHz, CDCl3): d = 8.05-8.00 (m, 2H), 7.37-7.33 (m, 2H), 3.93 (s, 3H), 1.85-1.80 (m, 2H), 1.51-1.47 (m, 2H); ); (0528) LC-MS (method 1): Rt 0.87, m/z = 202 (M+1).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, Methyl 4-(cyanomethyl)benzoate, and friends who are interested can also refer to it.

Reference:
Patent; SYNGENTA PARTICIPATIONS AG; GAGNEPAIN, Julien, Daniel, Henri; EDMUNDS, Andrew; EMERY, Daniel; HALL, Roger, Graham; HUETER, Ottmar, Franz; KOLLETH KRIEGER, Amandine; RENDLER, Sebastian; SCHAETZER, Juergen, Harry; (0 pag.)WO2020/2563; (2020); A1;,
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Related Products of 261762-98-5,Some common heterocyclic compound, 261762-98-5, name is 3-Chloro-2-fluorophenylacetonitrile, molecular formula is C8H5ClFN, 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 S59; Preparation of 2-(3-chloro-2-fluoro-phenyl)-ethylamine hydrochloride; 1.87 g of (3-chloro-2-fluoro-phenyl)-acetonitrile (11 mmol) were dissolved in 18 ml THF and cooled down to 0 C. under nitrogen. 58 ml of a 1M borane-THF complex solution in THF (58 mmol) were then added dropwise over 20 min by keeping the temperature between 0 to 2 C. After addition the reaction mixture was stirred at rt for additional 20 min, and refluxed for 21 h. The reaction mixture was then cooled down to 0 C. and treated between 2 and 5 C. with 13 ml methanol over a period of 35 min. After 1 h refluxing the reaction mixture was concentrated, the residue dissolved in DCM and the amine extracted twice with 1N aqueous HCl. The combined aqueous phases were then treated with concentrated NaOH to adjust the pH to 12, and then extracted twice with DCM. The combined organic phases were then washed with water, dried over magnesium sulfate, filtered and concentrated in vacuo leading to 1.6 g colorless oil. This was dissolved in 50 ml diethylether, treated with 5 ml 2.6N HCl in diethylether, stirred at rt for additional 60 min, filtered and dried under high vacuo, leading to 1.6 g white solid (69%). MS (ISP) 174.2 (M+H)+.

The synthetic route of 261762-98-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Conte-Mayweg, Aurelia; Kuehne, Holger; Luebbers, Thomas; Maugeais, Cyrille; Mueller, Werner; Pflieger, Philippe; US2006/30613; (2006); 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. 38487-86-4, name is 2-Amino-4-chlorobenzonitrile, A new synthetic method of this compound is introduced below., Recommanded Product: 2-Amino-4-chlorobenzonitrile

Cyclohexanone (36mL), 2-amino-4-chlorobenzonitrile (4.6g, 30mmol) and zinc chloride (4.1g, 30mmol) were mixed in a flask and the mixture was heated to 120C for 3h. Following cooling to room temperature and evaporation of the solvent, the residue was diluted with ethyl acetate (30mL) and the solid was collected by filtration. A 10% aqueous solution of NaOH (50mL) was added. After stirring for 2h, the mixture was filtered, and the filter cake was washed with water and extracted with methanol. The combined extracts were concentrated to afford the desired product (4.7g) in 67% yield. 1H NMR (400MHz, DMSO) delta 8.17 (d, J=9.0Hz, 1H), 7.62 (d, J=2.0Hz, 1H), 7.28 (s, 1H), 6.46 (s, 2H), 2.81 (d, J=5.5Hz, 2H), 2.52 (s, 2H), 1.80 (d, J=4.7Hz, 4H). LC/MS (ESI): m/z 233.2 [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:
Article; Sun, Yang; Chen, Jianwen; Chen, Xuemin; Huang, Ling; Li, Xingshu; Bioorganic and Medicinal Chemistry; vol. 21; 23; (2013); p. 7406 – 7417;,
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