Month: September 2021

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. 52099-72-6, name is 1-(Prop-1-en-2-yl)-1H-benzo[d]imidazol-2(3H)-one, A new synthetic method of this compound is introduced below., Recommanded Product: 1-(Prop-1-en-2-yl)-1H-benzo[d]imidazol-2(3H)-one

Step A: Ethyl 2,3-dihydro-3-(1-methyl-ethenyl)-2-oxo-1H-benzimidazol-1-butanoate A solution of 19 g of 1,3-dihydro-1-(1-methylethenyl)-2H-benzimidazol-2-one [described in J. Chem. Soc. Perkins, 1982, p. 261] in 150 ml of dimethylformamide was added with stirring at 20 C.+-2 C. to 5.75 g of sodium hydride as a 50% suspension in oil and 10 ml of dimethylformamide and the mixture was stirred for another 30 minutes. 23.4 g of ethyl 4-bromo-butyrate were added to the mixture over 15 minutes and the mixture was stirred at room temperature for 4 hours and was poured into 800 ml of iced water. The mixture was extracted with ether and the organic phase was washed with water, dried and evaporated to dryness under reduced pressure to obtain 33 g of ethyl 2,3-dihydro-3-(1-methyl-ethenyl)-2-oxo-1H-benzimidazol-1-butanoate.

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; Roussel Uclaf; US4585770; (1986); A;,
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. 1457-58-5, name is 2-Methyl-1H-imidazole-5-carboxylic acid, A new synthetic method of this compound is introduced below., Product Details of 1457-58-5

WSC (4.0 g), HOBt (3.2 g) and triethylamine (3.8 mL) were added to a solution of benzyl 4-aminopiperidine-1-carboxylate (3.3 g) and 2-methyl-1H-imidazole-4-carboxylic acid (2.0 g) in acetonitrile (50 mL) and stirred for 12 hours. The reaction solution was concentrated and the residue was dissolved in chloroform and an aqueous saturated sodium bicarbonate solution. A chloroform layer was separated, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The residue was purified with silica gel column chromatography to obtain the title compound (2.4 g, 49%) as colorless powder. NMR (300 MHz, CDCl3) delta: 1.41-1.56 (2H, m), 1.93-2.06 (3H, m), 2.40 (3H, s), 2.92-3.07 (2H, m), 4.06-4.21 (2H, m), 5.14 (2H, s), 7.07 (1H, d, J = 8.3), 7.30-7.42 (5H, m), 10.92 (1H, br)

The synthetic route of 1457-58-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Takeda Pharmaceutical Company Limited; EP1564213; (2005); 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. 1074-59-5, name is 3-(1H-Imidazol-4-yl)propanoic acid, This compound has unique chemical properties. The synthetic route is as follows., COA of Formula: C6H8N2O2

3-(1-Triphenylmethyl-4-imidazolyl)propionic acid 3-(4-Imidazolyl)propionic acid (1.0 g, 7.1 mmol) was suspended in a mixture of dichloro-methane (5 ml) and acetonitrile (25 ml). Trimethylsilyl chloride (781 mg, 7.2 mmol) was added and the mixture refluxed for 4 hours. Triethylamine (1 ml) was added, and refluxing continued for 15 minutes. Cooled, triethylamine (1 ml) added followed by chlorotriphenylmethane (1.99 g, 7.1 mmol) in dichloromethane (10 ml), and the mixture stirred at ambient temperature for 2 hours. MeOH (20 ml) was added, the mixture stirred for 30 minutes, then evaporated to dryness. Water (50 ml) was added to the residue, and the pH adjusted to 8-8.5 with triethylamine. The precipitate was filtered off, washed with diethyl ether, and dried to give the desired product (2.25 g). MS (ESP): 383 (MH+) for C25H22N2O2 NMR (DMSO-d6) delta: 2.48 (t, 2H); 2.77 (t, 2H); 6.65 (s, 1H); 7.08 (d, 6H); 7.29 (s, 1H); 7.36 (m, 9H); 12.10 (br, 1H).

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 1074-59-5.

Reference:
Patent; Syngenta Limited; US2003/144263; (2003); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

1632-83-3, name is 1-Methylbenzimidazole, 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: 1632-83-3

In an oven dried nitrogen purged 3 neck 100 mL round bottom flask, 1.00 g (7.57 mmol) of 1 -methylbenzimidazole in 20 mL of dry tetrahydrofuran is cooled to -78C. 10.69 mL (18.17 mmol) of 1.7 M t-butyllithium in hexanes is added and the reaction mixture is stirred at -780C. for 1 h. 2.55 g (11.36 mmol) of NIS in 20 mL of dry tetrahydrofuran is added. Reaction is removed from bath and stirred at room temperature for 1 hour, quenched with saturated aqueous solution of ammonium chloride, and diluted with dichloromethane. The layers are separated, the aqueous is extracted 3X100 mL dichloromethane, dried (MgSO4), and concentrated. The crude mixture is purified by EPO chromatography using hexanes:ethyl acetate as a solvent system. The product containing fractions are combined to obtain 0.400 g of the title compound, 21% yield. MS, ES+ = 259.0 (M+l); 1H NMR (DMSO-d6) 57.580-7.552 (m, 2H); 7.228-7.129 (m, 2H); 3.750 (s, 3H) ppm.

The synthetic route of 1632-83-3 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ELI LILLY AND COMPANY; WO2006/107784; (2006); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application of 96797-15-8, 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. 96797-15-8 name is 4-Iodo-1-trityl-1H-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.

[270] To a solution of (2-forrnylphenyl)boronic acid (2.0 g, 13.3 rnrnol) in a rnixed solvent of N,N- dirnethylforrnarnide (DMF) (60 rnL) and water (12 rnL) was successively added 4-iodo-1- trityl-1H-irnidazole (6.1 g, 14.0 rnrnol), and potassiurn phosphate (5.6 g, 26.6 rnrnol). After degassing with nitrogen, the resulted rnixture was added tetrakis(triphenylphosphine)palladiurn(0) (Pd(PPh3)4) (300 rng, 0.26 rnrnol). The resulted rnixture was degassed with nitrogen and stirred at 90C for overnight under nitrogen. And then the rnixture was cooled down to roorn ternperature and filtered, the filtrate was added water (60 rnL), extracted with ethyl acetate (100 rnLx2). The cornbined organic phase was washed with brine (25 rnL), dried over sodiurn sulfate, filtered and concentrated. The residue was purifiedby colurnn chrornatography on silica gel (petroleurn ether: ethyl acetate= 6:1) to afford cornpound 1.1 (3.3 g, yield: 60%) as a white solid.[271] rn/z: [M+H]415

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

Reference:
Patent; SHANGHAI DE NOVO PHARMATECH CO.,LTD.; LI, Qun; GAO, Daxin; (158 pag.)WO2016/131380; (2016); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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 3034-38-6 as follows. Recommanded Product: 5-Nitro-1H-imidazole

General procedure: A mixture of 1.6 mmol of C-nitro-NH-azole (1a-e), 2.6 mmol of arylboronic acid (2a-n), 1.6 mmol of sodium hydroxide, 0.2 mmol of CuCl2 and methanol (15 mL) was refluxed while air was bubbled through the reaction mixture. After completion of the reaction, determined on the basis of TLC analysis, the solvent was removed under reduced pressure using a rotary evaporator. The obtained crude product was purified by silica gel column chromatography with 5:95 v/v MeOH/CHCl3 as an eluent to give corresponding N-aryl-C-nitroazole. The product was crystallized from methanol/water.

According to the analysis of related databases, 3034-38-6, the application of this compound in the production field has become more and more popular.

Reference:
Article; Kurpet, Marta K.; Dabrowska, Aleksandra; Jarosz, Malgorzata M.; Kajewska-Kania, Katarzyna; Kuznik, Nikodem; Suwinski, Jerzy W.; Beilstein Journal of Organic Chemistry; vol. 9; (2013); p. 1517 – 1525;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Some common heterocyclic compound, 36947-69-0, name is 2-(tert-Butyl)-1H-imidazole, molecular formula is C7H12N2, 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. SDS of cas: 36947-69-0

Step c: 2-tert-butyl-N,N-dimethyl- 1H- imidazole- 1 -sulfonamide[0465] 2-tert-Butyl-lH- imidazole (0.5 g, 4.03 mmol) was added to a suspension of 60% sodium hydride (0.5 g, 12.1 mmol) in DMF (6.0 mL) at 0C and the mixture was stirred for 0.5 h. Then N,N-dimethylsulfamoyl chloride (0.7 g, 4.84 mmol) was added dropwise and the reaction mixture was stirred at room temperature for 2 h. Saturated NH4CI solution was added and the resulting mixture was extracted with ethyl acetate. The combined extracts were washed with brine, dried over anhydrous Na2S04 and concentrated. The residue was purified by flash column chromatography on silica gel (DCM/MeOH = 20: 1 to 5: 1) to afford 0.8 g of the title compound as a white solid (86%> yield).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 36947-69-0, its application will become more common.

Reference:
Patent; ZENOBIA THERAPEUTICS, INC.; BOUNAUD, Pierre-Yves; NIENABER, Vicki; STEENSMA, Ruo, W.; LOWE, John, A., III; WO2012/178015; (2012); A2;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application of 50995-95-4,Some common heterocyclic compound, 50995-95-4, name is 2-Propylimidazole, molecular formula is C6H10N2, 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 vessel with a magnetic stirrer bar was charged with imidazole derivative (0.5 mmol), CuI (10 mg, 0.05 mmol), Cs2CO3 (0.33 g, 1 mmol), PPh3 (26 mg, 0.1 mmol) and tetrabutylammonium bromide (TBAB) (0.2 g, 0.6 mmol) under a nitrogen atmosphere. The reaction vessel was evacuated and backfilled with nitrogen three times. In a separate flask, a solution of dry dioxane (2 mL) containing the 1,1-dihalo-1-alkenes (1 mmol) was evacuated and back-filled with nitrogen gas three times. The dioxane solution was then added to the reaction flask via a syringe and the reaction mixture heated to 100 C for 30 hours. The reaction mixture was cooled to room temperature, quenched with 5 mL of a saturated NH4Cl solution, and extracted with ethyl acetate (3 x 10 mL). The combined organic phases were dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by flash column chromatography with ethyl acetate (EA) and petroleum ether (Pet) as the eluent to afford the corresponding products:

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

Reference:
Article; Wang, Man-Gang; Yu, Hua; Wu, Jun; Shang, Zhi-Cai; Journal of Chemical Research; vol. 37; 9; (2013); p. 570 – 573;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Electric Literature of 492-98-8, 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. 492-98-8, name is 1H,1’H-2,2′-Biimidazole belongs to imidazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

Compound 2 was synthesized hydrothermally by reaction of H3PW12O40 xH2O (0.075g, 0.026 mmol), AgNO3 (0.051g, 0.3 mmol), H2biim (0.008g, 0.06 mmol) and 10 mL distilled water in a 25 ml Teflon-lined autoclave. The pH was adjusted to 2 with 1.0 mol L-1 HNO3. The mixture was heated under autogenous pressure at 160 C for 5 days and then was left to cool to room temperature. Red crystals could be isolated in about 60% yield and dried at room temperature for the further characterization. Anal.Calcd for 2: C7.13,H0.50, N6.23. Found: C7.02,H0.45,N6.42%. IR(ITR mode,cm1): 1502(s),1412(w),1352(s),1243(w),1153(s),1075(s),968(s),890(s),793(s).The IR spectrum of compound 2 is shown in the Supporting information (Fig. S6).

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, 1H,1’H-2,2′-Biimidazole, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Lu, Xin-Xin; Luo, Yu-Hui; Lu, Chen; Chen, Xin; Zhang, Hong; Journal of Solid State Chemistry; vol. 232; (2015); p. 123 – 130;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Adding a certain compound to certain chemical reactions, such as: 3012-80-4, name is 1-Methyl-1H-benzo[d]imidazole-2-carbaldehyde, 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 3012-80-4, Formula: C9H8N2O

General procedure: Benzimidazole 1 or 2 (1 mmol)was added to the mixture of TfOH (1 mL) or H2SO4 (2 mL) and arene (2-18 mmol). Reactionmixture was stirred at room temperature for the time as indicated in Table 3 or Scheme 2. Themixture was poured into ice water (30 mL). After extraction with CH2Cl2 (3 × 30 mL), thecombined extracts were consequently washed with water (50 mL), saturated aqueous solution ofNa2CO3 (30 mL), water (50 mL), dried with anhydrous Na2SO4 and evaporated in vacuo to givecrude products, which was subjected to chromatographic separation on silica gel using petroleumether/diethyl ether as an eluent.

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, 1-Methyl-1H-benzo[d]imidazole-2-carbaldehyde, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Ryabukhin, Dmitry S.; Turdakov, Alexey N.; Soldatova, Natalia S.; Kompanets, Mikhail O.; Ivanov, Alexander Yu.; Boyarskaya, Irina A.; Vasilyev, Aleksander V.; Beilstein Journal of Organic Chemistry; vol. 15; (2019); p. 1962 – 1973;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem