Tag: M.W=200-300

These common heterocyclic compound, 28890-99-5, name is 5H-Benzo[d]benzo[4,5]imidazo[1,2-a]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. Product Details of 28890-99-5

500ml of four bottles,In the atmosphere of nitrogen gas,0.01 mol of 5H-benzimidazol [1,2-a] benzimidazole was added,0.05 mol (6-bromo-9-phenyl-9H-carbazol-3-yl) -di-dibenzofuran-4-yl-0.03 mol of sodium tert-butoxide,1 x 10-4 mol Pd2 (dba) 3,1 x 10-4 mol tri-tert-butylphosphine,250ml toluene,Heated to reflux for 24 hours,Sampling point plate, antiShould be completely, natural cooling, filtration, the filtrate steamed, silica gel column, get the target product,Purity 99.10, yield 36.00%.

The synthetic route of 5H-Benzo[d]benzo[4,5]imidazo[1,2-a]imidazole has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Jiangsu Sanyue Photoelectric Technology Co., Ltd.; Li, Chong; Xu, Kai; Zhang, Zhaochao; Ye, Zhonghua; Wang, Lichun; (29 pag.)CN106467549; (2017); A;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Reference of 641571-11-1,Some common heterocyclic compound, 641571-11-1, name is 3-(4-Methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)aniline, molecular formula is C11H10F3N3, 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.

Example 1; Synthesis of compound of formula (Ia); To a 1 -L flask, equipped with a mechanical stirrer, temperature sensor, reflux condenser, addition funnel and nitrogen inlet-outlet under a nitrogen atmosphere at 23C is charged with compounds (lie) (16 g), (IVa) (12 g) and THF (300 mL). The mixture is stirred for 15 minutes at 23C and cooled to -2O0C to -15C. A solution of 1 M potassium f-butoxide in THF (275 mL) is added at -2O0C to -100C. After the addition, the mixture is warmed to 18-23C. When the reaction is complete according to HPLC, the mixture is cooled to 5C. A solution of 15% aqueous sodium chloride (500 mL) is added to the mixture, maintaining temperature below 15C. Product is extracted into isopropyl acetate (500 mL) and washed in sequence with 15% aqueous sodium chloride solution (500 mL) and water (500 mL). The organic phase is distilled under atmospheric pressure at an internal temperature of 75-85C until the residual volume is about 200 mL. The resulting suspension is cooled to 70 +/- 5C and charged with ethanol (250 mL) and water (30 mL). The mixture is heated to reflux (780C) for 1 hour and then cooled to -1O0C to -15C. The suspension is stirred for an EPO additional 30 minutes at -1O0C to -15C. Any solid is collected by filtration, rinsed with cold (50C) ethanol (85 ml_) and dried under vacuum (10-20 torr) at 55-6O0C with a nitrogen bleed (8-16 hours) to obtain AMN107 (17.4 g, 67% yield) as a white solid.1H NMR 300 MHz, DMSOd6), delta 10.5 (s, 1 H), 9.15 (s, 1 H), 9.05 (S, 1 H), 8.60 (s, 1 H), 8.45 (d, 1 H), 8.35 (d, 1 H), 8.22 (d, 2H), 8.10 (d, 2H)1 7.65 (m, 2H), 7.45 (m, 4H), 2.25 (s, 3H), 2.05 (s, 3H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 3-(4-Methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)aniline, its application will become more common.

Reference:
Patent; NOVARTIS AG; NOVARTIS PHARMA GmbH; WO2006/135641; (2006); A2;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Related Products of 670-83-7,Some common heterocyclic compound, 670-83-7, name is 2,5-Diphenyl-1H-imidazole, molecular formula is C15H12N2, 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.

EXAMPLE 3 2,5-diphenyl-4-hydroxymethyl-imidazole hydrochloride 5 g (0.0227 mole) of 2,4-diphenyl-imidazole, 0.85 g (0.0283 mole) of paraformaldehyde and 0.1 g of finely ground potassium hydroxide are dissolved in 29 ml of warm methanol and heated under reflux for 90 hours. The solution is then decolourized with activated carbon, filtered and dried. Water and chloroform are added to the residue by stirring; the insoluble solid of both the layers is filtered, washed with water and chloroform and dried. 2.8 g (yield 49.3%) of crude product is thus obtained, which is crystallized from methanol to afford 1.1 g of 2,5-diphenyl-4-hydroxymethyl-imidazole, m.p. 206-207 C. (dec.) By the usual techniques the hydrochloride has been obtained, m.p. about 220 C. (dec.).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2,5-Diphenyl-1H-imidazole, its application will become more common.

Reference:
Patent; Zambon S.p.A.; US4560696; (1985); A;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application of 14813-85-5, 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. 14813-85-5, name is 1-Phenyl-1H-benzo[d]imidazol-2(3H)-one belongs to imidazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

General procedure: Starting materials 16-18 (1 mmol) and K2CO3 (2 mmol) were suspended in DMF (1.8 mL) and stirred at 25 C for 30 min. 11 and 12, respectively (1.5 mmol) were added after 30 min and the solution was stirred at room temperature overnight. To the mixture was added ethyl acetate (5 mL) and water (5 mL).The aqueous layer was extracted several times with ethyl acetate (10 mL) and the combined organic layers were washed with brine, dried over MgSO4 and evaporated to dryness.

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-Phenyl-1H-benzo[d]imidazol-2(3H)-one, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Neudorfer, Catharina; Seddik, Amir; Shanab, Karem; Jurik, Andreas; Rami-Mark, Christina; Holzer, Wolfgang; Ecker, Gerhard; Mitterhauser, Markus; Wadsak, Wolfgang; Spreitzer, Helmut; Molecules; vol. 20; 1; (2015); p. 1712 – 1730;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Reference of 144689-93-0,Some common heterocyclic compound, 144689-93-0, name is Ethyl 4-(1-hydroxy-1-methylethyl)-2-propylimidazole-5-carboxylate, molecular formula is C12H20N2O3, 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.

Example 1; Ethyl 4-( 1 -hydroxy- 1 -methylethyl)-2-propyl- 1 – { 4- [2-(tetrazol-5-yi)phenyl]phenyl}methyl- imidazole-5-carboxylate (3); Acetone (200 ml) was added to the weighed ethyl ester of 4-(l -hydroxy- l-methylethyl)-2- propyl-lH-imidazole-5-carboxylic acid (1; 20 g), substance 2 (46.4 g), potash (40 g), and polyethylene glycol 400 (2 g). The resulting mixture was heated to the boil for H h. After filtering off the solids the filtrate was concentrated, ethanol (350 ml) was added to the concentrated filtrate, and the suspension was heated to the boil. After it was cooled to 15 C (20 minutes), the insoluble portion was sucked off and washed with ethanol (40 ml). After drying (50 0C, in vacuo), 50.7 g of the product (85 %) was obtained.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Ethyl 4-(1-hydroxy-1-methylethyl)-2-propylimidazole-5-carboxylate, its application will become more common.

Reference:
Patent; ZENTIVA, A.S.; WO2007/48361; (2007); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Reference of 6478-79-1, 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 6478-79-1 as follows.

To a solution of compound 1 (0.010?mol) in dry acetone, K2CO3 (0.025?mol) was added and the mixture was stirred at room temperature for 20?min. Then, methyl bromoacetate (0.011?mol) was added to the mixture and stirred at room temperature for one night. Afterwards, the reaction was completed (monitored by TLC, ethylacetate/hexane, 3:1). The product was precipitated by addition of water. It was filtrated off, and recrystallized from ethanol/water, 1:2. Yield: 92%, mp: 166-167?C. 1H NMR (DMSO-d6) ppm: 1.20 (3H, t, J?=?6.8?Hz, CH3), 2.44 (3H, s, CH3), 4.17 (2H. q, J?=?6.8?Hz, OCH2), 5.20 (2H, s, N-CH2), 7.78 (1H, s, Ar-H), 7.91 (1H, s, Ar-H). 13C NMR (DMSO-d6) ppm: 13.78, 14.42 (CH3), 45.12 (NCH2), 61.90 (OCH3), ArC:[112.25, 119.83, 124.45, 124.64, 135.65, 142.19], 155.72 (C=N), 168.35 (C=O). Anal. calcd. (%) for C12H12Cl2N2O2: C, 50.20; H, 4.21; N, 9.76. Found: C, 50.28; H, 4.26; N, 9.69.

According to the analysis of related databases, 6478-79-1, the application of this compound in the production field has become more and more popular.

Reference:
Article; Mente?e, Emre; Emirik, Mustafa; Soekmen, Bahar Bilgin; Bioorganic Chemistry; vol. 86; (2019); p. 151 – 158;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

3543-73-5, name is Ethyl 4-(5-amino-1-methyl-1H-benzo[d]imidazol-2-yl)butanoate, 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. Formula: C14H19N3O2

Example-1 Preparation of Ethyl 4-{5-[bis(2-hydroxyethyl)amino]-1-methyl-1H-benzimidazol-2-yl}butanoate (III) Ethyl 4-[5-amino-1-methyl-1H-benzimidazol-2-yl)butanoate (II, 40.0 g, 0.153 mol) was added to 2-bromoethanol (80 mL) and agitated for 15-30 minutes. Acetonitrile (80 mL) and calcium carbonate (61.3 g, 0.61 mol) were added to the reaction mixture. The reaction mixture was heated to 80-90 C. within 2 hours and refluxed at 80-90 C. for 34-38 hours. The reaction mixture was cooled to below 70 C. and acetonitrile (80.0 mL) was added. The reaction mixture was further cooled to 20-30 C. and filtered through celite prewashed with acetonitrile. The filtrate was concentrated at 50-60 C. under vacuum till viscous mass is obtained. The viscous mass was cooled to 20-30 C. Dichloromethane (320.0 mL) was added to the viscous mass under stirring and washed with potassium carbonate solution (32.0 g in 200 mL water). The organic layer was washed with DM water twice. The organic layer (Dichloromethane) was concentrated under vacuum at 35-40 C. till viscous mass is attained. The viscous mass was dried under vacuum at 35-40 C. for one hour. Ethyl acetate (160.0 mL) was added to the viscous mass and cooled to 0-5 C. and stirred for one hour. The solid separated out was filtered and washed with ethyl acetate. The isolated solid was dissolved in dichloromethane and concentrated the solution under vacuum at 35-40 C. till viscous mass. The viscous mass was dissolved in acetone and cooled to 0-5 C. under stirring. The solid separated out was filtered, washed with acetone and dried at 40-45 C. under vacuum for 4-6 hours to give the title compound (III, 30.1 g; 56.30%), with a purity of 97.22%.

The synthetic route of 3543-73-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; FRESENIUS KABI ONCOLOGY LIMITED; MISHRA, Bhuwan Bhaskar; KACHHADIA, Nikunj Shambhubhai; TOMAR, Vinod Singh; LAHIRI, Saswata; US2014/121383; (2014); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application of 219814-29-6, These common heterocyclic compound, 219814-29-6, name is 2,5-Dibromo-4-methylimidazole, 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.

[Example 6]; While a mixture of 23.9 g (100.0 mmol) of 2,4-dibromo-5-methylimidazole, 29.4 g (300.0 mmol) of cyclohexanone, and 23.9 g (259.4 mmol) of toluene was stirred at ordinary temperature, 22.5 g (150.0 mmol) of sodium iodide was added thereto to prepare a reaction liquid. After the reaction liquid was stirred at 105C for 12 hours under a nitrogen stream, the liquid was stirred under ice cooling for 1 hour. When 2-bromo-4-methylimidazole in the reaction liquid was analyzed by means of HPLC, it was confirmed that the product was formed in an amount of 13.7 g (82.3 mmol, conversion: 85.3%). After the reaction liquid was concentrated under reduced pressure, the product was purified by silica gel chromatography (ethyl acetate/hexane system) and, after volatile matter was further vaporized to solidify the product, crystals of 2-bromo-4-methylimidazole were obtained in an amount of 12.6 g (yield: 78.1%) as a residue. Incidentally, the NMR spectrum of the crystals was measured and was compared with the NMR spectrum of its specimen, whereby it was confirmed that the product is 2-bromo-4-methylimidazole.

Statistics shows that 2,5-Dibromo-4-methylimidazole is playing an increasingly important role. we look forward to future research findings about 219814-29-6.

Reference:
Patent; SHIKOKU CHEMICALS CORPORATION; EP2141151; (2010); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application of 67085-11-4,Some common heterocyclic compound, 67085-11-4, name is 4-(4-Chlorophenyl)-1-(1H-imidazol-1-yl)butan-2-ol, molecular formula is C13H15ClN2O, 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.

B. Alternatively, a mixture of 1-(4-(4-chlorophenyl)-2-hydroxybutyl)imidazole (1.8 kg, 7.18 mol), 2.25 equivalents of pyridine-sulfur trioxide complex and methylene chloride (8.6 L) stirred in the presence of excess dimethyl sulfoxide (19 L) and triethylamine (9 L) at 20-35 C. for 3 hours. Upon completion of reaction, the mixture was combined with water (76 L) and hexane (34.4 L). The product was isolated, washed with water and hexane and dried to yield 4-(4-chlorophenyl)-1-(imidazol-1-yl)butan-2-one, 1.48 kg (83% yield).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 4-(4-Chlorophenyl)-1-(1H-imidazol-1-yl)butan-2-ol, its application will become more common.

Reference:
Patent; Syntex (U.S.A.) Inc.; US5208331; (1993); A;,
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. 39513-26-3, name is 5-Bromo-1,3-dihydrobenzoimidazol-2-one belongs to imidazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below. Safety of 5-Bromo-1,3-dihydrobenzoimidazol-2-one

General procedure: To a solution of 5-bromo-lH-benzo[d]imidazol-2(3H)-one80 (50 mg) in dioxane (1 ml) were added pyridin-3-ylboronic acid 81 (43.3 mg), [l,l-bis(diphenyl- phosphino)ferrocene]dichloropalladium(II) (17.2 mg) and 2 M aq. sodium carbonate solution (235 mu). The reaction mixture was heated at 100 C for 18 hours. The reaction mixture was then cooled to room temperature, diluted with water (50 ml), and extracted twice with ethyl acetate (2 x 30ml). The combined organic layers were dried over Na2S04, filtered and concentrated in vacuo. The residue was purified by chromatography (silica gel; 12 g; eluent: dichloromethane/methanol = 100/0 to 95/05 in 10 minutes) to afford 5-(pyridin-3-yl)-lH- benzo[d]imidazol-2(3H)-one (12 mg, 23%) as a red solid. MS (ISP): 212.1 ([M+H]+).

The synthetic route of 39513-26-3 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; GOERGLER, Annick; NORCROSS, Roger; DEY, Fabian; KUSZNIR, Eric Andre; (206 pag.)WO2019/43217; (2019); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem