Tag: M.W=100-200

Application of 26391-06-0, 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. 26391-06-0, name is 2-Cyano-N,N-diethylacetamide belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

General procedure: A solution of arylaldehyde (1 equiv), 2-cyanoacetamide or derivative (1.0-1.5 equiv) and N-methylpiperazine (0.05-1.05 equiv) in methanol (2-10 ml) was stirred at room temperature overnight. After addition of an equivalent volume of water/methanol (1:1) or 1 N HCl/methanol (1:1) for acidic products, the precipitate was collected by filtration and washed with water/methanol (1:1). If precipitation did not occur, the mixture was evaporated and the residue was purified by flash chromatography.

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

Reference:
Article; Nitsche, Christoph; Steuer, Christian; Klein, Christian D.; Bioorganic and Medicinal Chemistry; vol. 19; 24; (2011); p. 7318 – 7337;,
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Application of 621-50-1,Some common heterocyclic compound, 621-50-1, name is 2-(3-Nitrophenyl)acetonitrile, molecular formula is C8H6N2O2, 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.

N-[3-(4,5-dihydro-1H-imidazol-2-ylmethyl)-phenyl]-methanesulfonamide hydrochloride 1-Chloromethyl-3-nitro-benzene (5 g) and 4.28 g of sodium cyanide were dissolved in a mixture of 15 ml of water and 50 ml of dioxane and the two phase mixture was heated to 100C for 12 hr. The dioxane was removed by evaporation and the aqueous solution was extracted with dichloromethane. The organic extract was washed with brine, dried, and evaporated. The residue was purified by flash column chromatography eluding with EtOAc:hexane (1:4) to afford 2.86 g of a tan solid, mp 51.7-52.7C, of (3-nitro-phenyl)-acetonitrile. (3-Nitro-phenyl)-acetonitrile (2.79g) was dissolved in 50 ml of ethyl acetate and the mixture was treated with 19.5 g of tin (II) chloride dihydrate and stirred at room temperature for 72 hr. The mixture was diluted with ethyl acetate and treated with saturated sodium bicarbonate solution, separated, and extracted with ethyl acetate. The extracts were combined, dried, and evaporated, leaving 2.1 g of tan oil of (3-amino-phenyl)-acetonitrile.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-(3-Nitrophenyl)acetonitrile, its application will become more common.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; EP887346; (1998); A2;,
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Synthetic Route of 2973-50-4, 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. 2973-50-4, name is 2-(2-Aminophenyl)acetonitrile belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

To a stirred solution of 6-(difluoromethyl) pyridazine-4-carboxylic acid Int-29 (1 g, 5.75 mmol) in ethylacetate (60 mE) was added 2-(2-aminophenyl)acetoni- trile (759 mg, 5.75 mmol) andtriethylamine (1.6 mE, 11.49 mmol) at room temperature under an inert atmosphere. To this was added propylphosphonic anhydride (50% in EtOAc, 9.14 mE, 14.37 mmol) drop wise at 00 C. The reaction mixture was gradually warmed to room temperature and stirred for 2 h. After consumption of starting material (by TEC), the reaction mixture was basified using saturated sodium bicarbonate solution to pH .-8 and extracted with EtOAc (2×50 mE). The combined organic extracts were dried over anhydrous Na2SO4 and concentrated under reduced pressure. The crude material was triturated with n-pentane (2×25 mE) and dried under vacuum to afford N-(2-(cyanomethyl)phenyl)-6-(difluoromethyl)pyridazine- 4-carboxamide (1.4 g, 4.86 mmol, 85%) as a yellow solid.11619] ?H NMR (500 MHz, DMSO-d5): oe 10.77 (s, 1H),9.80 (s, 1H), 8.45 (s, 1H), 7.54-7.49 (m, 1H), 7.45-7.30 (m, 4H), 4.02 (s, 2H)11620] EC-MS: mlz 288.9 [M+H] at 2.25 RT (98.33% purity)

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-(2-Aminophenyl)acetonitrile, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Viamet Pharmaceuticals (NC), Inc.; Sparks, Steven; Yates, Christopher M.; Shaver, Sammy R.; Hoekstra, William J.; (156 pag.)US2018/185362; (2018); A1;,
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Related Products of 654-70-6,Some common heterocyclic compound, 654-70-6, name is 4-Cyano-3-trifluoromethylaniline, molecular formula is C8H5F3N2, 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 22.3: 4-Amino-2-trifluoromethyl-benzaldehyde A solution of 3 g (0.0161 mol) 4-amino-2-trifluoromethyl-benzonitrile in 9 mL of dry THF is treated dropwise at rt and under nitrogen with 26.85 mL (0.0403 mol) of a 1.5 M diisobutyl-aluminum-hydride solution in toluene. During the addition the temperature is maintained at maximally 28 C. by appropriate cooling. After complete addition the brown solution is allowed to stand at rt over night. It is then added dropwise to a mixture of 4.4 mL of methanol and 39 mL of a saturated (~3M) potassium sodium tartrate solution. During the hydrolysis the temperature is kept below 40 C. After stirring for 15 minutes ethyl acetate is added and the two layers separated. The ethyl acetate phase is washed with water and brine, dried with sodium sulphate and evaporated. The brown foam obtained consists of oligomeric forms of the aldehyde (imine formation) and is therefore re-dissolved in 10 mL of ethyl acetate and stirred efficiently for 10 minutes with 10 mL of 1 N HCl. Sodium hydroxide (1 N, 8.5 mL) is added and stirring is continued for 5 more minutes (at the end the solution has pH ~9). The ethyl acetate is separated, washed with brine, dried with sodium sulphate and evaporated to give crude 4-amino-2-trifluoromethyl-benzaldehyde as a brown oil which is immediately used in the next step.

The synthetic route of 654-70-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Caravatti, Giorgio; Furet, Pascal; Imbach, Patricia; Martiny-Baron, Georg; Perez, Lawrence Blas; Sheng, Tao; US2006/35897; (2006); A1;,
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51762-67-5, name is 3-Nitrophthalonitrile, 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. Recommanded Product: 3-Nitrophthalonitrile

3-nitrophthalicnitrile (20 mmol) and dipotassium 2-naphthol-6,8-disulfonate (20-70 mmol, preferably 60 mmol) as reactants, dimethyl sulfoxide (40-200 mL) , preferably 140 mL) is a solvent, and the reaction is stirred at room temperature ~ 60C (preferably 60C) for 24 to 72 hours in the presence of potassium carbonate (30 to 90 mmol, preferably 80 mmol) and nitrogen, monitored by thin layer chromatography. The insoluble potassium carbonate was removed from the reaction mixture by filtration, and the filtrate was added with 30 mL of ice-cold chloroform to precipitate a yellow-white precipitate that was filtered, washed with ethanol and acetone until the solution was colorless.Vacuum dried at 50CdryGet 3-(6,8-disulfo-2-naphthyloxy)phthalimide dipotassium saltThe yield is 93%.

The synthetic route of 51762-67-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Fuzhou University; Huang Jiandong; Peng Xiaohui; Zheng Bingde; (25 pag.)CN107915740; (2018); A;,
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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. 90381-43-4, name is 7-Methoxy-2-naphthonitrile, A new synthetic method of this compound is introduced below., Quality Control of 7-Methoxy-2-naphthonitrile

EXAMPLE 185A 7-methoxy-2-cyanonaphthalene, (2.79 g, 5.23 mmol) and tetrabutylammonium iodide (17 mg, 0.157 mmol) were combined in a mixture of benzene (35 mL) and cyclohexanes (17.5 mL). The resulting solution was added to a rapidly stirring, cooled (ice/water) suspension of aluminum triiodide (6.21 g, 15.23 mmol) in a mixture of benzene (35 mL) and cyclohexanes (17.5 mL) under an inert atmosphere. After the addition, the resulting suspension was heated at reflux for 2.5 hours. The heating was removed and after cooling to near room temperature, the reaction mixture was cooled in an ice bath and quenched by the addition of water (100 mL). The resulting mixture was further diluted with 2 M aqueous sodium thiosulfate solution (50 mL) and extracted with ethyl acetate (3*80 mL). The combined organic layers were dried and evaporated. The resulting solid was dissolved in a minimum of hot ethyl acetate, diluted hot with hexanes to the cloud point and placed in a refrigerator for 2 hours. The desired compound was collected by filtration, (1.99 g, 77%). MS (DCI (NH3)) m/z 187 (M+NH4)+.

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; Abbott Laboratories; US6258822; (2001); B1;; ; Patent; Abbott Laboratories; US6284796; (2001); B1;,
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Electric Literature of 874-97-5, 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. 874-97-5 name is 3-Cyanobenzyl alcohol, 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.

Step e 3-(4-MethoxytrityloxymethvObenzonitrile (Ie”)3-(Hydroxymethyl)benzonitrile (2 g, 15 mmol) was dissolved in dry pyridine (120 ml). 4- methoxytrityl chloride (6 g, 19.5 mmol) was added and the mixture was stirred over night at room temperature (r.t.). The reaction was quenched with ethanol (EtOH), evaporated on rotavapor and the residue partitioned between dichloromethane (DCM) and saturated aqueous sodium bicarbonate. The organic phase was dried by sodium sulphate and evaporated. Silica gel column chromatography (gradient 30%DCM / hexane – DCM) gave the title compound (5.98 g,98%).1H-NMR (400MHz, CDCl3): delta 7.70-7.25 (m, 16H), 6.85 (d, 2H), 4.23 (s, 2H), 3.81 (s, 3H).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-Cyanobenzyl alcohol, and friends who are interested can also refer to it.

Reference:
Patent; MEDIVIR AB; WO2008/135488; (2008); A1;,
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Electric Literature of 4513-77-3, 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. 4513-77-3, name is 2-Oxocyclohexanecarbonitrile belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

General procedure: A solution of 2-oxocyclohexanecarbonitrile (59, 2.57 g, 20.9 mmol) and ethyl hydrazineoxalate (60, 4.70 g, 31.3 mmol) in ethanol(40 mL) was stirred at reflux for 18 h, cooled to room temperature and thesolvent removed under reduced pressure.The residue was diluted with methylene chloride (150 mL) and saturatedaqueous sodium bicarbonate (100 mL) was added.The organic layer was separated and the aqueous layer was furtherextracted with methylene chloride (2 ×100 mL).The combined organic layers were washed with brine (50 mL), dried (MgSO4),filtered and concentrated under reduced pressure. The resulting residue was further purified byflash column chromatography on silica gel, eluting with methanol/methylenechloride (gradient of 2:98 to 4:96) to afford 2-ethyl-4,5,6,7-tetrahydro-2H-indazol-3-amine (61) as a while solid(2.73 g, 79%)

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

Reference:
Article; Rynearson, Kevin D.; Buckle, Ronald N.; Barnes, Keith D.; Herr, R. Jason; Mayhew, Nicholas J.; Paquette, William D.; Sakwa, Samuel A.; Nguyen, Phuong D.; Johnson, Graham; Tanzi, Rudolph E.; Wagner, Steven L.; Bioorganic and Medicinal Chemistry Letters; vol. 26; 16; (2016); p. 3928 – 3937;,
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Application of 21524-39-0, The chemical industry reduces the impact on the environment during synthesis 21524-39-0, name is 2,3-Difluorobenzonitrile, I believe this compound will play a more active role in future production and life.

A mixture of 3 -methyl- lH-pyrazole-4-carboxylic acid ethyl ester (1.25 g, 8.1 1 mmol), potassium carbonate (1.68 g, 12.16 mmol), 2,3-difluorobenzonitrile (1.08 mL, 9.73 mmol) in dimethylformamide (12 mL) is heated at 100C with the aid of a magnetic stirred. After 2.5 hr. the reaction mixture is treated with water and extracted with ethyl acetate. The organic layer is decanted, washed with brine, dried over magnesium sulfate and the solvent evaporated under reduced pressure to give 2.3 g of l-(2-cyano-6-fluoro- phenyl)-3 -methyl- lH-pyrazole-4-carboxylic acid ethyl ester (this compound is contaminated with the other pyrazole regioisomer in a ratio 75:25). MS (m/z): 274 (M+1).

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, 2,3-Difluorobenzonitrile, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ELI LILLY AND COMPANY; BENITO COLLADO, Ana Belen; DIAZ BUEZO, Nuria; JIMENEZ-AGUADO, Alma Maria; LAFUENTE BLANCO, Celia; MARTINEZ-GRAU, Maria Angeles; PEDREGAL-TERCERO, Concepcion; TOLEDO ESCRIBANO, Miguel Angel; WO2011/60217; (2011); A1;,
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Reference of 403-54-3, These common heterocyclic compound, 403-54-3, name is 3-Fluorobenzonitrile, 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 nitrile (10 mmol), halohydrocarbons (11 mmol) and FeCl2·4H2O (2 mol %) was placed in a round bottom flask. Then the reaction mixture was heated at 80 C for the given time. After completion of the reaction monitored by thin layer chromatography (TLC), 5 ml water was added into reaction system and extracted with ethyl acetate (3 × 5 ml). The organic layers were collected, combined, washed with water (3 × 10 ml), dried over anhydrous Na2SO4, and concentrated under vacuum. The pure product was obtained by directly passing through a silica gel (200-300 mesh) column using petroleum ether/ethyl acetate and identified by 1HNMR and 13C NMR.

Statistics shows that 3-Fluorobenzonitrile is playing an increasingly important role. we look forward to future research findings about 403-54-3.

Reference:
Article; Feng, Cheng-Liang; Yin, Gui-Bo; Yan, Bin; Chen, Jun-Qing; Ji, Min; Chemical Papers; vol. 73; 2; (2019); p. 345 – 353;,
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