Author: Jessica.F

Electric Literature of 31643-49-9, A common heterocyclic compound, 31643-49-9, name is 4-Nitrophthalonitrile, molecular formula is C8H3N3O2, 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 500 mL three-neck rounde-bottom flask was added resorcinol (16.52 g, 0.15 mol), 4-nitrophthalonitrile (51.94 g, 0.30 mol) and 180 mL DMSO. During the course of the reaction, the K2CO3 (62.19 g, 0.45 mol) was added in three portions at an interval of 20 min. Then the resulting mixture was heated at 40 C for 12 h under nitrogen. After cooling, the product mixture was poured into water. The light yellow filtrate was collected by suction filtration and washed with large amount of water until the filtrate was neutral. The crude product (42.0 g) was purified by rinsing with CH2Cl2 in Buchner funnel and suction flask, and the filtrate was then dried by evaporation under a vacuum at 80 C for 5 h to remove CH2Cl2. The yellow-white powder was obtained in 68.7 wt% yield (28.9 g), m. p. peak at 183 C (sharp) (DSC) at a heat rate of 10 C/min. FTIR (KBr), 2232 (C?N), 1284 (Ar-O-Ar), 1248 (Ar-O-Ar). 1H NMR (400 MHz, DMSO-d6): 8.14-8.11 (d, 2H; Ar H), 7.92 (s, 2H; Ar H), 7.63-7.53 (m, 3H; Ar H), 7.15-7.12 (m, 3H; Ar 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; Yuan, Ping; Ji, Suchun; Hu, Jianghuai; Hu, Xueping; Zeng, Ke; Yang, Gang; Polymer; vol. 102; (2016); p. 266 – 280;,
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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. 194853-86-6, name is 4-Fluoro-2-(trifluoromethyl)benzonitrile belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. category: nitriles-buliding-blocks

. 4-({[2-(methyloxy)phenyI]methyl}amino)-2-(trifluoromethyl)benzonitriIeTo a solution of 4-flouro-2-(trifluouromethyl)benzonitrile (reagent A) (500 mg, 2.6 mmol) in anhydrous DMF (0.5 M) was added 2-methoxybenzylamine (reagent B) (0.35 mL, 2.6 mmol) and oven-dried potassium carbonate (365 mg, 2.6 mmol). The reaction mixture stirred at 85 0C for 18 hours. After cooling to room temperature, the reaction mixture was diluted with water. The organics were extracted into ethyl ether and dried over sodium sulfate. The Filtrate was concentrated, and remaining DMF was removed under reduced pressure to yield a beige solid (415 mg, 51% crude yield): MS (ESI) 306.3 (MH)+.

The synthetic route of 194853-86-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; SMITHKLINE BEECHAM CORPORATION; WO2006/113552; (2006); A2;,
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Some common heterocyclic compound, 1813-33-8, name is 2-Chloro-4-(trifluoromethyl)benzonitrile, molecular formula is C8H3ClF3N, 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. name: 2-Chloro-4-(trifluoromethyl)benzonitrile

General procedure: A mixture of 2-chloro-4-(trifluoromethyl)-benzonitrile (1.00 mmol) and appropriate thiol (RSH, 3.00 mmol),18-crown-6-ether (cat.) and potassium carbonate (2.00 mmol)were dissolved in acetonitrile (3 ml). The mixture was refluxedfor 12 h and then cooled to ambient temperature. The mixturewas quenched by adding water and extracted with EtOAc.Extracted organic compound was dried over MgSO4, filtered, andconcentrated in vacuo. The residue was purified by flash columnchromatography on silica gel using EtOAc/hexane (1:4) eluantcondition. (RSH = CH3CO2(CH2)2SH for 42).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 1813-33-8, its application will become more common.

Reference:
Article; Ann, Jihyae; Jung, Aeran; Kim, Mi-Yeon; Kim, Hyuk-Min; Ryu, Hyungchul; Kim, Sunjoo; Kang, Dong Wook; Hong, Sunhye; Cui, Minghua; Choi, Sun; Blumberg, Peter M.; Frank-Foltyn, Robert; Bahrenberg, Gregor; Stockhausen, Hannelore; Christoph, Thomas; Lee, Jeewoo; Bioorganic and Medicinal Chemistry; vol. 23; 21; (2015); p. 6844 – 6854;,
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Related Products of 17823-40-4, 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 17823-40-4 as follows.

A mixture of 2-ethynyl-1,3-dimethylbenzene (Compound 6) (0.4 g, 3.0 mmol), 4-bromo-2,3,5,6-tetrafluorobenzonitrile (0.38 g, 1.5 mmol), Pd(PPh3)4 (0.173 g,0.15 mmol), Cul (0.057 g, 0.3 mmol) and diisopropylamine (0.4 g, 4 mmol) in dioxane (40 mL) was degassed and heated at about 80 C for about 16 hours. The resulting mixture was worked up with ethyl acetate. After filtered off precipitate, the solution was loaded on silica gel and purified by flash column using eluents of hexane to hexane/dichloromethane (4:1). Removal of solvent give a white solid (Compound 7) (0.4 g, in 88% yield).

According to the analysis of related databases, 17823-40-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; NITTO DENKO CORPORATION; ZHENG, SHIJUN; BASIAGO, ADAM; (86 pag.)JP2016/526025; (2016); A;,
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Reference of 302912-31-8, These common heterocyclic compound, 302912-31-8, name is Ethyl 2-(4-cyanophenyl)-2-oxoacetate, 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.

A mixture of (4-cyano-phenyl)-oxo-acetic acid ethyl ester 1.0 g, 4.9 mmol) in 20 mL of dichloromethane and (diethylamino)sulfur trifluoride (DAST) (1.0 g, 6.2 mmol) was stirred at r.t. for 3 hrs. The mixture was poured into iced water and extracted with ethyl acetate. The organics were dried over MgSO4 and concentrated to give crude (4-cyano-phenyl)-difluoro-acetic acid ethyl ester which was used for the reaction.

Statistics shows that Ethyl 2-(4-cyanophenyl)-2-oxoacetate is playing an increasingly important role. we look forward to future research findings about 302912-31-8.

Reference:
Patent; Wyeth; US2005/131014; (2005); A1;,
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Electric Literature 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.

The indicated aniline (0.52 g, 2.8 mmol) was added to a solution of the bromide (prepared according to the procedure of Example 5, 0.21 g, 0.56 mmol) in Toluene (3 mL), followed by Cs2CO3 (0.18 g, 0.56 mmol). The reaction mixture was heated at reflux overnight. The reaction mixture was cooled to room temperature and H2O was added. The resulting mixture was extracted with ethyl acetate (3×80 mL). The combined ethyl acetate extracts were washed with brine and dried over Na2SO4. Na2SO4 was then filtered off and solvent was evaporated in vac and the residue was chromatographed on silica gel using acetone:hexanes (20:80) 1% Et3N to give the titled compound. NaH (7.0 mg, 0.17 mmol) was added to the aniline (prepared according to the procedure of Example 19 Step 1, 41.0 mg, 0.09 mmol) in THF (1.5 mL) at -20 C. and stirred under N2 for 10 minutes. MeI (16.3 muL, 0.26 mmol) was added to the reaction mixture and the resulting mixture stirred at room temperature overnight. The residue was partitioned between ethyl acetate and H2O. The combined ethyl acetate extracts were dried over sodium sulfate and filtered. The solvent was evaporated in vac to give the titled compound. Aqueous NaOH (50, 2 mL) was added to the nitrile (prepared according to the procedure of Example 19 Step 2, 171.2 mg, 0.35 mmol) in MeOH (10 mL) and THF (4 mL). The reaction mixture was heated at reflux overnight. The reaction mixture was cooled to room temperature and neutralized with acetic acid, then extracted with ethyl acetate. The combined ethyl acetate extracts were washed with brine and dried over Na2SO4. Na2SO4 was then filtered off and solvent was evaporated in vac. The residue was chromatographed on silica gel using ethyl acetate:hexanes (20:80) 2.5% acetic acid to give the titled compound. 1H NMR (CDCl3) delta7.99 (d, 1H, J=9.0 Hz), 7.59 (d, 1H, J=9.0), 7.07 (m, 2H), 6.84 (m, 1H), 4.18 (t, 2H, J=5.5), 3.75 (t, 2H, J=7.5), 3.13 (s, 3H), 3.00 (t, 2H, J=7.5), 2.20 (m, 2H), 1.80 (m, 2H), 1.00 (t, 3H, J=7.5). MS: m/z=505 (M+H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 4-Cyano-3-trifluoromethylaniline, its application will become more common.

Reference:
Patent; Adams, Alan D.; Huang, Shaei Y.; Szewczyk, Jason W.; US2006/178398; (2006); A1;,
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Related Products of 1261609-83-9, These common heterocyclic compound, 1261609-83-9, name is 2-Bromo-5-(hydroxymethyl)benzonitrile, 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.

Step B: Preparation of 2-bromo-5-(chloromethyl)benzonitrile [00231] To a magnetically stirred mixture of 2-bromo-5-(hydroxymethyl)benzonitrile (0.5 g, 2.358 mmol) in dry DCM (11.79 ml) at ice-bath tetmperatures was added thionyl chloride (0.344 ml, 4.72 mmol) in a dry 50 mL round-bottomed flask. DMF (0.5 mL) was added to aid solubilization. The reaction mixture was stirred at reduced temperature for 15 min and then was allowed to warm to rt. After 1 h, GC-MS analysis indicated the reaction was complete. The reaction mixture was diluted with DCM and sat’d aq. NaHC03, then stirred vigorously for 30 min. The layers were separated, the aq layer was extracted again with DCM, and the combined DCM extracts were dried over sodium sulfate, and filtered through a phase separator. The DCM was evaporated to afford 485 mg (56%) of the title compound as a white wax. H NMR (400 MHz, CDCI3) delta 7.70 (d, J = 3.8 Hz, 1H), 7.68 (d, J = 2.1 Hz, 1H), 7.48 (dd, J = 8.4, 2.3 Hz, 1H), 4.54 (s, 2H). 13C NMR (101 MHz, CDC13) delta 137.70, 134.03, 133.82, 133.60, 125.14, 116.62, 116.36, 43.93. GC-MS m z 231.

The synthetic route of 1261609-83-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; DOW AGROSCIENCES LLC; LOSO, Michael R.; GUSTAFSON, Gary D.; KUBOTA, Asako; YAP, Maurice C.; BUCHAN, Zachary A.; STEWARD, Kimberly M.; SULLENBERGER, Michael T.; HOEKSTRA, William J.; YATES, Christopher M.; WO2015/160665; (2015); A1;,
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Application of 42872-83-3,Some common heterocyclic compound, 42872-83-3, name is 2-Bromo-5-methylbenzonitrile, molecular formula is C8H6BrN, 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: To a mixture of 2-Bromobenzonitrile (183.4 mg, 1 mmol), benzaldehyde (210.5 mg, 2 mmol),CuCl2 (17.2 mg, 0.1 mmol), Cs2CO3 (652.2 mg, 2 mmol), and L-proline (23.2 mg, 0.2 mmol) in H2O(2 mL) was added 27% aqueous ammonia (1 mL) in a tube under air atmosphere. Then the tubewas sealed, and the mixture was stirred at 100 C for 12 h. Next, the tube was opened to air and themixture was stirred at 100 C for another 12 h. After being cooled to room temperature, the resultingmixture was quenched with NH4Cl solution and extracted with ethyl acetate. The combined organiclayer was washed with brine, and then dried over anhydrous Na2SO4. The solvent was evaporatedunder reduced pressure and the crude product was purified by chromatography on silica-gel to afford2-phenylquinazolin-4(3H)-one (4aa) in 75% isolated yield.

The synthetic route of 42872-83-3 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Liu, Zibin; Zeng, Li-Yan; Li, Chao; Yang, Fubiao; Qiu, Fensheng; Liu, Shuwen; Xi, Baomin; Molecules; vol. 23; 9; (2018);,
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Synthetic Route of 23842-82-2, 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. 23842-82-2, name is 2-Amino-5-methoxybenzonitrile belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

[0340] Following a reported procedure (Michaelidou, S. S.; Koutentis, P. A. Tetrahedron 2010, 66, 685-688), 2-amino-5-methoxybenzonitrile (Manetsch, R. et al. Chem. Eur. J. 2004, 10, 2487-2506) (0.109 g, 0.74 mmol) was treated with paraformaldehyde (0.024 mg, 0.81 mmol), potassium cyanide (0.053 g, 0.81 mmol), zinc chloride (0.201 g, 1.473 mmol) and sulfuric acid (1 drop) in acetic acid (2.2 mL) in a sealed tube. The mixture was then stirred at 55 C. overnight. The reaction mixture was allowed to cool to room temperature, poured onto ice and made pH neutral with Na2CO3. Filtration of the precipitate gave the title compound (0.068 g, 50%). [0341] 1H NMR (CDCl3, 400 MHz) delta 7.11 (dd, 1H, J=2.8, 9.1 Hz), 6.98 (d, 1H, J=2.8 Hz), 6.75 (d, 1H, J=9.1 Hz), 4.15 (s, 2H), 3.74 (s, 3H). [0342] MS (ESI) m/z 188.1 [M+H]+ ([M+H]+, C10H10N3O requires 188.2).

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-Amino-5-methoxybenzonitrile, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Board of Regents of The University of Texas System; McKnight, Steven L.; Pieper, Andrew A.; Ready, Joseph M.; Fernandez, Enrique; US2014/57900; (2014); 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. 508203-48-3, name is 2,3-Difluoro-4-methylbenzonitrile, A new synthetic method of this compound is introduced below., category: nitriles-buliding-blocks

To a heterogenous solution of 2,3-difluoro-4-methylbenzonitrile (5.0 g, 32.6 mmol) in ethanol (11 1 mL) at 25C was added hydroxylamine hydrochloride (4.5 g, 65.3 mmol). The reaction mixture was heated at 80C for 2 hours. After cooling to room temperature the volatiles were removed under reduced pressure thus affording a white solid that was used in the next step without purification. (0432) NMR (400 MHz, DMSO-de) delta ppm: 9.30 (brs, 3H), 7.30 (m, 1 H), 6.95 (m, 1 H), 2.30 (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.

Reference:
Patent; SYNGENTA PARTICIPATIONS AG; HOFFMAN, Thomas, James; STIERLI, Daniel; BEAUDEGNIES, Renaud; POULIOT, Martin; HAAS, Ulrich, Johannes; (111 pag.)WO2018/219773; (2018); A1;,
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