Tag: M.W=100-200

Application of 15108-18-6,Some common heterocyclic compound, 15108-18-6, name is 2-Hydrazinyl-1H-benzo[d]imidazole, molecular formula is C7H8N4, 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 solution of 2-hydrazino-1 H-benzimidazole (5.0 g, 33.7 mmol) in ethanol (30 ml) is added sequentially triethylamine (5 ml, 33.7 mmol) and N-cyanoformimidic acid ethyl ester (3.3 g, 33.7 mmol) with cooling. After stirring for 2 hours at 0C the resulting precipitate is filtered with suction and dried to give 3-, amino-2-(1 H-benzimidazol-2-yl)-1, 2, 4-triazole. 1H- NMR (400 MHz, d6-DMSO) : 13.0 (s, 1 H) ; 7.77 (s, 1 H) ; 7.70 (m, 2H); 7.50 (m, 2H); 7.20 (s, 2H).

The synthetic route of 15108-18-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; BASILEA PHARMACEUTICA AG; WO2005/77939; (2005); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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. 3034-38-6, name is 5-Nitro-1H-imidazole, A new synthetic method of this compound is introduced below., HPLC of Formula: C3H3N3O2

EXAMPLE 2 202 parts of 5-nitroimidazole is dissolved in 600 parts of formic acid (90% by weight), 250 parts of dimethyl sulfate is added and the whole is heated for 6 hours. The formic acid is distilled off in vacuo. 420 parts of water is added to the residue, the whole cooled to from 0 to 5 C. and the unreacted 5-nitroimidazole (60 parts) is centrifuged off. The mixture is adjusted to pH 10 with aqueous ammonia solution (25% by weight) and the precipitate is separated at 0 to 5 C. 130 parts of 1-methyl-5-nitroimidazole having a melting point of 58 to 60 C. is obtained; this is equivalent to a yield of 82% of theory based on reacted 4(5)-nitroimidazole.

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; BASF Aktiengesellschaft; US4021442; (1977); A;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Adding a certain compound to certain chemical reactions, such as: 939-70-8, name is 1-(1H-Benzo[d]imidazol-2-yl)ethanone, belongs to imidazoles-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 939-70-8, name: 1-(1H-Benzo[d]imidazol-2-yl)ethanone

Synthesis of target compound Y-0: 2-acetylbenzimidazole (1 mmol) at 0 CTo a solution of ethanol (10 mL) was added 60% aqueous potassium hydroxide solution (3 mL) and benzaldehyde (1 mmol),Stir at room temperature until the reaction is complete. TLC monitors the progress of the reaction.After the reaction is complete, add crushed ice and dilute hydrochloric acid solution, adjust the pH to form a precipitate,The crude extract was dried by filtration and purified by column chromatography to obtain the target compound Y-0.(Synthesis method see literature: European Journal of Medicinal Chemistry 143 (2018) 66-84) Yield: 62.6%;

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

Reference:
Patent; Lanzhou University; Liu Yingqian; Wang Renxuan; Li Juncai; Yang Chengjie; Chen Yongjia; Peng Jingwen; Yin Xiaodan; Yan Yinfang; (10 pag.)CN110839636; (2020); A;,
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. 1546-79-8, name is 2,2,2-Trifluoro-1-(1H-imidazol-1-yl)ethanone, This compound has unique chemical properties. The synthetic route is as follows., Product Details of 1546-79-8

General procedure: The compound 6b (35.1 mg, 50 mumol) was dried by repeated coevaporations with dry MeCN (3 mL) under Ar. The thymidine 3?-O-oxazaphospholidine derivative 7t (75.5 mg, 0.10 mmol), which was dried in vacuo overnight, and a 0.3 M solution of CMPT 8 (0.5 mL), which was dried over MS3A overnight, were successively added, and the mixture was stirred for 20 min at rt under Ar. N-(Trifluoroacetyl)imidazole (17.0 muL, 0.15 mmol) and i-Pr2NEt (44.0 muL, 0.25 mmol) were added and the mixture was stirred for 30 min at rt. Then DTD (31.9 mg, 0.15 mmol) was added and the mixture was stirred for 50 min at rt. The mixture was then concentrated under reduced pressure, and the residue was dissolved in dichloromethane (5.0 mL). A 6 vol% DCA solution in dichloromethane (5.0 mL) and Et3SiH (1.2 mL, 7.5 mmol) were added and the mixture was stirred for 20 min at rt. The mixture was washed with saturated NaHCO3 aqueous solutions (3 × 10 mL). The aqueous layers were combined and back-extracted with dichloromethane (2 × 10 mL). The organic layers were combined, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by FSPE [1.6 cm column id, 4.8 g of fluorous silica gel, methanol-H2O 16 mL (80:20, v/v) then THF 25 mL] to give 14t, a, c or g as a colorless foam, which was analyzed by 31P NMR (Fig. 2). The 14t, a, c or g thus obtained was dissolved in ethanol (8.0 mL) and a 25% NH3 aqueous solution (40 mL) was added. The mixture was put in a sealed flask and heated at 55 C for 12 h while stirring. The mixture was then cooled to rt, concentrated under reduced pressure to ca. 20 mL The mixture was diluted with a 0.1 M ammonium acetate buffer (pH 7.0) (20 mL) and washed with CHCl3 (4 × 20 mL). The aqueous layer was then concentrated under reduced pressure. The residue was repeatedly lyophilized from distilled H2O to remove ammonium acetate to give crude the dinucleoside phosphorothioate (15t, a, c or g), which was analyzed by RP-HPLC [Senshu Pak PEGASIL ODS, 4 × 150 mm, linear gradient of 0-20% MeCN (60 min) in 0.1 M triethylammonium acetate buffer (pH 7.0), 50 C, 0.5 mL/min]. Authentic samples of 15t,a,c,g were synthesized via the solid-phase synthesis using the nucleoside 3?-O-oxazaphospholidines 7t,a,c,g as monomer units [8d].

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 1546-79-8.

Reference:
Article; Oka, Natsuhisa; Murakami, Ryosuke; Kondo, Tomoaki; Wada, Takeshi; Journal of Fluorine Chemistry; vol. 150; (2013); p. 85 – 91;,
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. 137049-00-4, name is 1-Methyl-1H-imidazole-4-sulfonyl chloride, This compound has unique chemical properties. The synthetic route is as follows., Formula: C4H5ClN2O2S

General procedure: NaH (6.7 mg, 0.28 mmol) was suspended in dry DMF.6-(1-methyl-1H-pyrazol-4-yl)-1H-pyrazolo[4,3-b]pyridine (39, 50 mg, 0.25 mmol) was added intothe above solution slowly at 0 C. Then, the cooling solution was stirred for 0.5 h. Subsequently,6-chloroimidazo[2,1-b]thiazole-5-sulfonyl chloride (77 mg, 0.3 mmol) was added and stirred for another 4 h at room temperature. Then, water (30 mL) was added to the reaction system. The reactionmixture was extracted with ethyl acetate (3 40 mL). The combined organic phase was washed withsaturated salt water (3 40 mL), dried over anhydrous Na2SO4, filtered, and concentrated underreduced pressure to give the corresponding crude target product, which was purified by flash columnchromatography with dichloromethane/methanol to afford compound 5 as a white hairy solid withthe yield of 78%.

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 137049-00-4.

Reference:
Article; Jiang, Alan; Liu, Qiufeng; Wang, Ruifeng; Wei, Peng; Dai, Yang; Wang, Xin; Xu, Yechun; Ma, Yuchi; Ai, Jing; Shen, Jingkang; Ding, Jian; Xiong, Bing; Molecules; vol. 23; 3; (2018);,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Related Products of 4857-06-1,Some common heterocyclic compound, 4857-06-1, name is 2-Chloro-1H-benzo[d]imidazole, molecular formula is C7H5ClN2, 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 solution of 2-chlorobenzomethylene (5 g, 32.7 mmol) was added 30 ml of acetonitrile and potassium hydroxide (2.62 g, 46.6 mmol) Heated to 80 C, stirred for 30min, the solution clarified; after cooling to room temperature, adding bromine bromide (9.29g, 49.1 mmol) 80 C reflux 5h, the reaction solution was white turbid; the reaction solution with dichloromethane extraction three times (100mLX3), distilled water The organic layers were combined, dried over anhydrous magnesium sulfate, suction filtered and concentrated to give a white solid which was recrystallized from acetone / petroleum ether and cooled And filtered, dried to give a white solid in a yield of 91.1%.

The synthetic route of 4857-06-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Shandong University; Du Lvpei; Li Minyong; Wang Beilei; (14 pag.)CN104910894; (2017); B;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

312-73-2, name is 2-(Trifluoromethyl)-1H-benzo[d]imidazole, belongs to imidazoles-derivatives compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. SDS of cas: 312-73-2

The -1H- benzimidazol-2-trifluoromethyl-2 (1.35g, 10mmol) was added to a round bottom flask containing 15mL of acetone were added ene (propargyl) propyl bromide dissolved with stirring (0.87mL, 10mmol) and K2CO3(2.07g, 15mmol), was heated under reflux, TCL is detected, after completion of the reaction, cooling was cooled, solid was removed by filtration, the solid was washed with methylene chloride, the solution was concentrated acetone solution was mixed with dichloromethane, washed with H2O wash (15mL × 3), the organic phase was dried over anhydrous MgSO4Dried, filtered and concentrated to give crude product.To give 1-propargyl-2-trifluoromethyl–1H- benzoimidazol (3) 2.06g, yield 91.96%.

The synthetic route of 312-73-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Zhejiang University of Technology; Wang, Yuguang; Zhu, Bingchun; Dong, Huichan; (11 pag.)CN104530008; (2016); B;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Reference of 4278-08-4, These common heterocyclic compound, 4278-08-4, name is 2-(4-Fluorophenyl)-1H-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.

To a stirring mixture of Intermediate RR-1 (112 mg, 0.338 mmol) in 0.7 mL of DMSO, 2-(4-fluorophenyl)-lH-imidazole (109 mg, 0.67 mmol) was added. The reaction mixture was placed in a 120 C oil bath for 2 h. The crude mixture was directly loaded and purified by silica gel chromatography to give the coupled nitro ester. LCMS: 457.1 m/z (M+H)+. To a stirring mixture of the coupled nitro ester in 1.2 mL of MeOH, Pt/C (42 mg) was added and the reaction mixture was placed under 1 atm of hydrogen for 2 h. The hydrogen balloon was removed and VO(acac)2 (5 mg) was added. This reaction mixture was placed under 1 atm of hydrogen overnight. The crude mixture was filtered through a plug of Celite and the plug was washed several times with EtOAc. The filtrate was concentrated under reduced pressure. To this cyclized product, 0.5 mL of dioxane, potassium bicarbonate (100 mg) and trimethylphosphate (200 mg) were added. The reaction mixture was warmed to 100 C for several hours. The crude product mixture was cooled to rt and diluted with EtOAc and water. The layers were separated and the aqueous layer was extracted with EtOAc. The organic layers were dried over MgS04, filtered, and concentrated under reduced pressure. The resulting material was purified by preparative HPLC to give the title compound. LCMS: 409.1 m/z (M+H)+; ret. Time 4.07 min (Analytical MethodD).

The synthetic route of 4278-08-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ELAN PHARMACEUTICALS, INC.; GALEMMO, Robert, A., Jr.; ARTIS, Dean, Richard; YE, Xiaocong, Michael; AUBELE, Danielle, L.; TRUONG, Anh, P.; BOWERS, Simeon; HOM, Roy, K.; ZHU, Yong-Liang; NEITZ, R., Jeffrey; SEALY, Jennifer; ADLER, Marc; BEROZA, Paul; ANDERSON, John, P.; WO2011/79114; (2011); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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. 33543-78-1, name is Ethyl 1H-imidazole-2-carboxylate, A new synthetic method of this compound is introduced below., Safety of Ethyl 1H-imidazole-2-carboxylate

tert-Butyl (2-bromoethyl)carbamate (17.59 g, 78.49 mmol) was added to ethyl 1H- imidazole-2-carboxylate (10 g, 71.36 mmol) and K2CO3 (11.83 g, 85.63 mmol) in DMF (200 mL) under nitrogen and the resulting mixture stirred at 80 C for 8 hours. The reaction mixture was diluted with EtOAc (300 mL), and washed sequentially with water (50 mL x 2). The aqueous layer was then further extracted with EtOAc (50 mL x 5). The combined organic phases were dried over MgS04, filtered and evaporated to afford crude product. The crude product was purified by flash silica chromatography, elution gradient 0 to 100% EtOAc in petroleum ether. Pure fractions were evaporated to dryness to afford ethyl 1 -(2-((tert-butoxycarbonyl)amino)ethyl)- lH-imidazole-2-carboxylate (Intermediate 7; 10.7 g, 53%) as a colourless liquid. 1HNMR (400 MHz, DMSO, 21 C) delta 1.20 (3H, t), 1.29 (9H, s), 3.26-3.34 (2H, m) 4.27 (2H, q) ,4.32-4.40 (2H, m), 6.90 (1H, s), 7.06 (1H, s), 7.32 (1H, s).

The synthetic route of 33543-78-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ASTRAZENECA AB; WARD, Richard, Andrew; JONES, Clifford, David; SWALLOW, Steven; GRAHAM, Mark, Andrew; DOBSON, Andrew, Hornby; MCCABE, James, Francis; (223 pag.)WO2017/80979; (2017); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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. 54624-57-6, name is 2-Bromobenzimidazole, A new synthetic method of this compound is introduced below., Recommanded Product: 54624-57-6

Tetrakis(triphenylphosphine)palladium(0) (0.028 g, 0.024 mmol) was added to a mixture of tert-butyl 4-(4-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2-yl)benzoyl)piperazine-l- carboxylate (0.050 g, 0.120 mmol), 2-bromo-lH-benzo[d] imidazole (0.035 g, 0.180 mmol), and sodium carbonate (0.051 g, 0.480 mmol) in dioxane (1.5 mL) and water (0.30 mL). The mixture stirred in the microwave at 50°C for 3 h. The reaction mixture was filtered through Celite and concentrated. The residue was purified via column chromatography on silica gel (Biotage 10 g column, gradient elution with 0-50percent ethyl acetate-hexane) to afford tert-butyl 4-(4-(lH-benzo[d]imidazol-2-yl)benzoyl)piperazine- 1-carboxylate (0.027 g, 0.066 mmol, 55 percent yield) as an off-white solid. MS (ESI, pos. ion) m/z: 407 (M + 1).

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; FORMA THERAPEUTICS, INC.; BAIR, Kenneth, W.; LANCIA, David, R.; LI, Hongbin; LOCH, James; LU, Wei; MARTIN, Matthew, W.; MILLAN, David, S.; SCHILLER, Shawn, E.r.; TEBBE, Mark, J.; WO2014/164749; (2014); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem