Month: June 2021

Application of 705-09-9, These common heterocyclic compound, 705-09-9, name is 2-(Difluoromethyl)-1H-benzo[d]imidazole, 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 1 : To a solution of 3a in DMF was added NaH with ice-bath. The resulting mixture was stirred for 15min. at 0-5 0C and was added 1g. The reaction mixture was stirred at r.t. over night and evaporated to remove DMF. The residue was purified by column chromatography (PE:EA=1:2) to give 3b.

Statistics shows that 2-(Difluoromethyl)-1H-benzo[d]imidazole is playing an increasingly important role. we look forward to future research findings about 705-09-9.

Reference:
Patent; TYROGENEX, INC.; LIANG, Congxin; LI, Zhigang; WO2010/56320; (2010); A2;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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. 144690-33-5, name is Ethyl 4-(2-hydroxypropan-2-yl)-2-propyl-1-((2′-(1-trityl-1H-tetrazol-5-yl)-[1,1′-biphenyl]-4-yl)methyl)-1H-imidazole-5-carboxylate belongs to imidazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below. category: imidazoles-derivatives

Example 2; The reaction part was charged with ethyl 4- (1-hydroxy-1-methylethyl) -2-propyl-1- {4- [2- (trityltetrazol-5-yl) phenyl] 22 g of 5-carboxylate (Formula 4), 3.1 g of sodium hydroxide and 90 mL of ethanol were added and the mixture was stirred at 20 to 25 C for 4 to 5 hours. When the reaction was completed, the reaction solution was concentrated. To the residue were added 50 mL of ethyl acetate and 50 mL of purified water. The mixture was stirred for 1 hour and then layered. The separated organic layer was washed twice with an aqueous solution containing 30 g of salt and 170 mL of purified water. 1 g of activated carbon and 20 g of anhydrous sodium sulfate were added to the organic layer, followed by stirring for 30 minutes to 1 hour, followed by filtration. The filtrate was concentrated under reduced pressure, and then methanol (65 mL) was added. The mixture was stirred for 3 hours and then filtered to obtain 4- (1-hydroxy-1-methylethyl) 5-yl) phenyl] phenyl} -methylimidazole-5-carboxylate (formula 5) 20.7g (yield 95%, purity 99.98%)

The synthetic route of 144690-33-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; DONGBANG FTL CO., LTD; Song, Tae Hong; Jung, Hun Suk; Jang, Do Yeon; Moon, Chung Sun; Jung, Hee Jung; (18 pag.)KR101526249; (2015); B1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Synthetic Route of 68282-47-3, 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. 68282-47-3 name is 2-Phenyl-1H-imidazole-4-carbaldehyde, 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 2-phenyl-1H-imidazole-4-carbaldehyde (1.73 g) in ethanol (30 mL) was added 40% methylamine-methanol solution (2.36 g) and the mixture was stirred at 65C for 1 hr. The mixture was allowed to cool to room temperature, sodium borohydride (571 mg) was added and the mixture was stirred for 30 min. 1 mol/L Hydrochloric acid was added to the reaction mixture, and the mixture was concentrated under reduced pressure. A saturated aqueous sodium hydrogen carbonate solution was added to the residue, and the mixture was extracted with tetrahydrofuran. The extract was dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography (eluent: ethyl acetate-methanol=1:0?4:1) and dissolved in methanol (10 mL). A 4 mol/L hydrogen chloride-ethyl acetate solution (5 mL) was added, and the mixture was concentrated under reduced pressure. The residue was crystallized from ethyl acetate to give the title compound as colorless crystals (yield 1.06 g, yield 41%). 1H-NMR(DMSO-d6)delta:2.62(3H,s), 4.33(2H,s), 7.55-7.73(3H,m), 7.83(1H,s), 8.21(2H,br), 9.64(2H,br), 2H not detected.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2-Phenyl-1H-imidazole-4-carbaldehyde, and friends who are interested can also refer to it.

Reference:
Patent; Takeda Pharmaceutical Company Limited; EP2196459; (2010); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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. 934-22-5, name is 6-Aminobenzimidazole, This compound has unique chemical properties. The synthetic route is as follows., Recommanded Product: 934-22-5

General procedure: A dry 50 mL flask was charged with 2-halogenated aromatic aldehyde 1 (1.0 mmol), 1H-benzo[d]imidazol-5-amine (0.133 g,1.0 mmol), cyclohexane-1,3-diones (1.0 mmol), CuI (10 mg), L-proline(6 mg), Cs2CO3 (650 mg) and dioxane (10 mL). The reaction mixture was stirred at reflux for 10-18 h. After completion of the reaction, as indicated by TLC, the solid was filtered off by a fast and hot filtration, and the products of 4 were obtained as pale yellow powder or crystals, when the mixture was allowed to cool down to room temperature.

According to the analysis of related databases, 934-22-5, the application of this compound in the production field has become more and more popular.

Reference:
Article; Li, Chao; Zhang, Wen-Ting; Wang, Xiang-Shan; Tetrahedron; vol. 70; 46; (2014); p. 8919 – 8924;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Related Products of 15965-54-5, 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. 15965-54-5 name is 2-Chloro-5-methoxy-1H-benzo[d]imidazole, 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 2-chloro-5-methoxy-1H-benzo[djimidazole (13.04 mg, 0.071 mmol) and Intermediate I-i (20 mg, 0.059 mmol) was added toluene (0.75 mL) and EtOH (0.25 mL). The reaction mixture was stirred at room temperature until solids are dissolved, then [1,1 ?-Bis(diphenylphosphino)ferrocenej dichloropalladium (II) complex with dichloromethane (1:1) (5.83 mg, 7.14 imol) was added. The flask was degassed andflushed with argon. Finally sodium carbonate (0.059 mL, 2M, 0.119 mmol) was added dropwise. The reaction vessel was sealed and bubbled with argon for 5 mm, then placed in microwave reactor at 140 C for 30 mm. The reaction mixture was cooled to room temperature and was diluted with EtOAc and water, extracted with EtOAc (3X). The combined organic layer was washed with brine, dried with Mg504 and concentrated. Thecrude sample was purified with a preparative HPLC (method A, 30-100% B in 8 mm.). The desired fractions were placed in a SpeedVac overnight to remove solvent, then lyophilized to give Example 50 (6 mg, 0.016 mmol, 27.5 % yield). ?H NMR (acetonitrile-d3, 400MHz): = 8.77 (br. s., 2H), 7.70 (s, 3H), 7.27-7.39 (m, 1H), 7.05-7.18 (m, 1H), 3.90 (s, 3H), 2.65 ppm (s, 3H). ?9F NMR (acetonitrile-d3, 376MHz):= -76.64 (br. s., 3F), -90.69 ppm (s, 2F). LC-MS: method C, RT = 1.78 mm, MS (ESI) m/z: 357.0 (M+H). Analytical HPLC purity (method A): 98%

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2-Chloro-5-methoxy-1H-benzo[d]imidazole, and friends who are interested can also refer to it.

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; ZHANG, Xiaojun; PRIESTLEY, Eldon Scott; BATES, J. Alex; HALPERN, Oz Scott; REZNIK, Samuel Kaye; RICHTER, Jeremy M.; (1137 pag.)WO2018/13774; (2018); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Some common heterocyclic compound, 3034-50-2, name is Imidazole-4-carbaldehyde, molecular formula is C4H4N2O, 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. Recommanded Product: 3034-50-2

12.0 g (124 mmol) 4-formyl-imidazole are placed together with 750 mg Raney nickel in 1000 ml of methanolic ammonia solution and shaken at 40 C. for 30 min. Then the mixture is hydrogenated in a Parr apparatus under a hydrogen atmosphere at 5 bars pressure at 40 C. for 14 h. Another 750 mg Raney nickel are then added and the mixture is again hydrogenated at 50 C. under a hydrogen atmosphere at 5 bars pressure for 14 h. The mixture is filtered, evaporated down i. vac., and in each case methanol, toluene and ethanol are added to the residue and it is again evaporated down completely i. vac. The residue is combined with ethereal hydrochloric acid in methanol and evaporated down completely i. vac. The residue is in each case combined with methanol and dichloromethane and evaporated down completely i. vac.Yield: 21.2 g (quant.)Rt value: 0.49 min (D)C4H7N3*2 HCl (170.04/97.12)Mass spectrum: (M+H)+=98

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 3034-50-2, its application will become more common.

Reference:
Patent; Dahmann, Georg; Gerlach, Kai; Pfau, Roland; Priepke, Henning; Wienen, Wolfgang; Schuler-Metz, Annette; Nar, Herbert; US2008/51578; (2008); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Synthetic Route of 16042-25-4, A common heterocyclic compound, 16042-25-4, name is 2-Imidazolecarboxylic acid, molecular formula is C4H4N2O2, 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 stirred suspension of 1H-imidazole-2-carboxylic acid (3.00 g, 26.8 mmol) in anh. DCM (45 mL)cooled to 0 C under N2 was added oxalyl chloride (4.5 mL, 53.5 mmol) followed by addition of DMF (2 drops). The reaction was allowed to warm to rt and stir overnight. A further portion of oxalylchloride (1.13 mL, 13.4 mmol) and DMF (1 drop) was added and the reaction stirred for 4 hr.Volatiles were then removed in vacuo and the residual oxalyl chloride was removed by coevaporationwith toluene to afford acid chloride as a colourless solid. The solid was then addedportionwise to conc NH4OH (15 mL) chilled to 0 C. Volatiles were then removed in vacuo.Residual volatiles were coevaporated with toluene to obtain dry material (25: 75 startingmaterial:product). The crude was retreated to the reaction with oxalyl chloride (1.7 mL, 20.1 mmol)using the above procedure. The solid obtained was then washed with water (2 x 20 mL) and driedin vacuo to obtain a tan solid (2.16 g, 73%) that was used without further purification. LCMS (Waters Atlantis: Gradient Method 2): Rt = 1.44 min, 99 A% 254 nm, [M + H]+ = 112.2. 1H NMR(600 MHz, DMSO-d6) delta 12.95 (s, 1H), 7.73 (s, 4H), 7.43 (s, 1H), 7.23 (br s, 1H), 7.04 (br s, 1H).

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; Jarrad; Debnath; Miyamoto; Hansford; Pelingon; Butler; Bains; Karoli; Blaskovich; Eckmann; Cooper; European Journal of Medicinal Chemistry; vol. 120; (2016); p. 353 – 362;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Synthetic Route of 51605-32-4, These common heterocyclic compound, 51605-32-4, name is Ethyl 5-methyl-1H-imidazole-4-carboxylate, 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. To a stirred suspension of ethyl 4-methyl-1H-imidazole-5-carboxylate (2.00 g, 13.0 mmol) in acetonitrile (25 mL) and chloroform (25 mL) was added N-bromosuccinimide (2.31 g, 13.0 mmol). The reaction mixture was stirred under nitrogen atmosphere for 20 h, then concentrated in vacuo. The residue was dissolved in ethyl acetate (100 mL) and washed with saturated aqueous sodium bicarbonate (50 mL). The organic layer was dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography eluding with 50percent ethyl acetate in hexanes to afford ethyl 2-bromo-4-methyl-1H-imidazole-5-carboxylate as a light yellow solid (1.88 g, 62percent): 1H NMR (300 MHz, CDCl3) delta 4.35 (q, J=7.1 Hz, 2H), 2.51 (s, 3H), 1.37 (t, J=7.1 Hz, 3H); MS (ES+) m/z 233.1 (M+1), 235.1 (M+1).

The synthetic route of 51605-32-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Dales, Natalie; Fonarev, Julia; Fu, Jianmin; Hou, Duanjie; Kamboj, Rajender; Kodumuru, Vishnumurthy; Pokrovskaia, Natalia; Raina, Vandna; Sun, Shaoyi; Zhang, Zaihui; US2009/156615; (2009); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Some common heterocyclic compound, 2034-22-2, name is 2,4,5-Tribromoimidazole, molecular formula is C3HBr3N2, 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. Recommanded Product: 2034-22-2

PRODUCTION EXAMPLE 3 [PRODUCTION OF THE PRESENT COMPOUND (3)] To a solution of a sodium salt, prepared from 1.22 g of 2,4,5-tribromoimidazole and 0.16 g of 60% oil-based sodium hydride, in 5 ml of N,N-dimethylformamide was added dropwise 1.23 g of 4-bromobutoxymethyl bromide at room temperature. After stirring at room temperature for 3 hours, 50 ml of water was added to the reaction mixture which was then extracted with three 30-ml portions of ether. The ether layer was dried over magnesium sulfate and concentrated. The oily product obtained was purified by column chromatography on silica gel to obtain 0.74 g of 1-(4-bromobutoxymethyl)-2,4,5-tribromoimidazole.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2034-22-2, its application will become more common.

Reference:
Patent; Sumitomo Chemical Company, Limited; US4689340; (1987); A;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Reference of 139481-44-0,Some common heterocyclic compound, 139481-44-0, name is Methyl 1-((2′-cyano-[1,1′-biphenyl]-4-yl)methyl)-2-ethoxy-1H-benzo[d]imidazole-7-carboxylate, molecular formula is C25H21N3O3, 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 four-neck flask, 20 g of Compound 1 was added, and while stirring, 100 mL of dimethyl sulfoxide solution in which 10.14 g (3 eq) of hydroxylamine hydrochloride was added was added, and the mixture was heated to 90 DEG C and 30.95 g (6 eq) was added in portions under stirring. Sodium carbonate, after the completion of the reaction for 9-10 hours, after the completion of the reaction, it is allowed to come to room temperature, and 100 mL of water is added to stir the mixture. The solid precipitates, which is cooled down to 0-5C. Stirring is continued for about 1 hour, and the mixture is dried by suction to obtain 15.2 g of compound 2. The yield was 70.4%.

The synthetic route of 139481-44-0 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Disha Pharmaceutical Group Co., Ltd.; Fu Kaimin; (7 pag.)CN103242305; (2018); B;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem