Category: 84946-20-3

Reference of 84946-20-3, These common heterocyclic compound, 84946-20-3, name is 2-Chloro-1-(4-fluorobenzyl)-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.

EXAMPLE 42 To a 25 mL 3-neck flask equipped with a thermometer, reflux consenser and stir bar were added, under a nitrogen atmosphere, 885.6 mg (4.8 mmol) of Compound XXII, obtained according to the procedure of Example 41, and 0.93 mL (8.0 mmol) of lutidine. The mixture was heated to 120 C., whereupon a solution of 1.04 g (4 mmol., 1 eq.) of Compound X (Aldrich Chemical Co., Milwaukee, Wis.), 8 mmol of tetrabutylammonium fluoride (obtained from its 1.0M THF solution by distillation under vacuum with anhydrous toluene) and 4 mL of N-methylpyrrolidinone was added slowly over 2 h. The reaction mixture was allowed to stir at 120 C. for 1 h. High-performance liquid chromatography revealed >95% coversion to Compound XXIII. The reaction mixture was allowed to cool to ambient temperature, and slowly poured into a solution of 5% aqueous NaOH while stirring. The resulting suspension was allowed to stir at 0-10 C. for 30 minutes, and the resulting solid product was collected by vacuum filtration, washed with water (3*5 mL), and air dried for 30 minutes under vacuum to afford crude Compound XXIII: 1 H NMR (300 MHz, CDCl3) delta7.52 (1H, d, J=7.8 Hz), 7.20-7.00 (7H, m, two groups), 5.13 (2H, s), 4.40 (1H, NH br. d), 4.32 (2H, pseudo d), 4.20 (1H, m), 3.00 (2H, pseudo t), 2.15 (2H, pseudo d), 1.30 (2H, m overlapped), 1.26 (9H, s); 13 C NMR (75 MHz, CDCl3) delta176.3, 164.2 and 161.0 (13 C-19 F coupling), 153.3, 142.4, 134.6, 131.4, 128.4, 121.7, 120.0, 116.6, 116.4, 116.1, 107.5, 50.5, 45.1, 44.2, 38.9, 33.1, 28.6. It is to be noted that under the same reaction conditions as above, but without the use of tetrabutylammonium fluoride, only 3.5% conversion (high-performance liquid chromatography) to Compound XXIII was achieved after 3 h at 120 C. The Compound XXIII obtained above was placed in a 50 mL, 3-neck flask equipped with a thermometer, reflux condenser and stir bar. 5 mL of 48% hydrobromic acid was added, and the resulting mixture was heated to 110 C. and allowed to stir at that temperature for 2 h. After the reaction was complete (>98% conversion to norastemizole as shown by high-performance liquid chromatography), the reaction mixture was allowed to cool to room temperature, and 10 mL of toluene and 10 mL of water were added, with stirring.

The synthetic route of 84946-20-3 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Sepracor Inc.; US5817823; (1998); A;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Electric Literature of 84946-20-3, 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 84946-20-3 as follows.

1.2. 1-{1-[(4-Fluorophenyl)methyl]-1H-benzimidazol-2-yl}-N-methyl-4-piperidinamine (method B) 8.7 g (0.05 mole) of 4-methylaminopiperidine (in the form of acetate), 13 g (0.05 mole) of 1-(4-fluorobenzyl)-2-chlorobenzimidazole and 13.8 g (0.1 mole) of potassium carbonate in 250 ml of isoamyl alcohol are brought to reflux temperature for 192 h. The mixture is cooled and evaporated to dryness. The residue is taken up with a mixture of water and ether and agitated until crystallization occurs. The compound (V) obtained in hydrate form is filtered off. The precipitate is taken up with toluene and agitated until dissolution has occurred, and the solution is dried with magnesium sulphate, filtered and evaporated. The residual oil is ground in petroleum ether. The solid product is filtered off and dried. The compound thereby obtained melts at 77-80 C.

According to the analysis of related databases, 84946-20-3, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Synthelabo; US4820710; (1989); A;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Synthetic Route of 84946-20-3, 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. 84946-20-3 name is 2-Chloro-1-(4-fluorobenzyl)-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.

General procedure: A mixture of 1d (1.0 eq.) and ethanolamine (10 eq.) was heated to 150 C for 30 min by use of microwave irradiation. After the reaction was completed, the reaction mixture was cooled down to room temperature. The precipitated solid was filtered and washed with diethyl ether. The crude product was purified by flash column chromatography (MeOH/methylene chloride) to give desired product 1e.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2-Chloro-1-(4-fluorobenzyl)-1H-benzo[d]imidazole, and friends who are interested can also refer to it.

Reference:
Article; Oh, Sangmi; Kim, Sungbum; Kong, Sunju; Yang, Gyongseon; Lee, Nakyung; Han, Dawoon; Goo, Junghyun; Siqueira-Neto, Jair L.; Freitas-Junior, Lucio H.; Song, Rita; European Journal of Medicinal Chemistry; vol. 84; (2014); p. 395 – 403;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application of 84946-20-3, 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. 84946-20-3 name is 2-Chloro-1-(4-fluorobenzyl)-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.

EXAMPLE 43 Norastemizole. To a 25 mL 3-neck flask equipped with a thermometer, ref lux consenser and stir bar were added, under a nitrogen atmosphere, 822 mg (4.8 mmol) of Compound XVI, obtained according to the procedure of Example 6, and 0.93 mL (8.0 mmol) of lutidine. The mixture was heated to 120 C., whereupon a solution of 1.04 g (4 mmol., 1 eq.) of Compound X (Aldrich Chemical Co., Milwaukee, Wis.), 8 mmol of tetrabutylammonium fluoride (obtained from its 1.0M THF solution by distillation under vacuum with anhydrous toluene) and 4 mL of N-methylpyrrolidinone was added slowly over 2 h. The reaction mixture was allowed to stir at 120 C. for 2 h. High-performance liquid chromatography revealed >95% coversion to Compound XVIII. The reaction mixture was allowed to cool to ambient temperature, and slowly poured into a solution of 5% aqueous NaOH while stirring. The resulting suspension was allowed to stir at 0-10 C. for 30 minutes, and the resulting solid product was collected by vacuum filtration, washed with water (3*5 mL), and air dried for 30 minutes under vacuum to afford a crude mixture of Compound XVIII and 6% (HPLC) of migration product Compound XIX. NMR data for Compound XVIII: 1 H NMR (300 MHz, DMSO-d6) delta7.30-7.02 (6H, m two groups), 6.95 (1H, pseudo t, J=7.8, 2.3 Hz), 6.85 (1H, pseudo t, J=7.8, 2.3 Hz), 5.35 (2H, s), 4.33 (1H, pseudo d), 4.02 (1H, m), 3.83 (1H, pseudo d), 3.17 (1H, pseudo t), 2.75 (1H, pseudo t), 2.02 (3H, s), 2.0 (2H, m overlapped), 1.45 (2H, m); 13 C NMR (75 MHz, DMSO-d6) delta168.0, 163.0 and 159.7 (13 C-19 F coupling), 153.9, 142.8, 134.3, 133.5, 129.1, 129.0, 128.2, 120.5, 118.4, 115.5, 115.2, 107.9, 44.8, 43.7, 32.3, 31.5, 21.4. It is to be noted that under the same reaction conditions as above, but without the use of tetrabutylammonium fluoride, only 4.9% conversion (high-performance liquid chromatography) to Compound XVIII was achieved after 3 h at 120 C. In addition, without the use of tetrabutylammonium fluoride, the ratio of Compound XVIII:Compound XIX was 4:1. The mixture of Compound XVIII obtained above was placed in a 50 mL, 3-neck flask equipped with a thermometer, reflux condenser and stir bar. 5 mL of 6N hydrochloric were added, and the resulting mixture was heated to 110 C. and allowed to stir at that temperature for 5 h. After the reaction was complete (>98% conversion to norastemizole as shown by high-performance liquid chromatography), the reaction mixture was allowed to cool to room temperature, and 10 mL of toluene and 10 mL of water were added, with stirring.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2-Chloro-1-(4-fluorobenzyl)-1H-benzo[d]imidazole, and friends who are interested can also refer to it.

Reference:
Patent; Sepracor Inc.; US5817823; (1998); 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. 84946-20-3, name is 2-Chloro-1-(4-fluorobenzyl)-1H-benzo[d]imidazole belongs to imidazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below. Recommanded Product: 84946-20-3

EXAMPLE B8 (+-)-cis-1-(3,5-dimethylbenzoyl)-2-(phenylmethyl)-4-piperidinol (2.6 g) dissolved in N,N-dimethylformamide (100 ml) was stirred under N2. Sodium hydride (60%) (0.36 g) was added and the mixture was stirred at 40 C. for 1 hour. 2-Chloro-1-[(4-fluorophenyl)-methyl]-1H-benzimidazole (2.6 g) was added and the mixture was stirred at 60 C. for 20 hours. The solvent was evaporated and the residue was taken up in water and CH2 Cl2. The organic layer was separated, dried, filtered and the solvent evaporated. The residue was purified by column chromatography over silica gel (eluent: CH2 Cl2 /CH3 OH 97/3). The pure fractions were collected and the solvent was evaporated. The residue was crystallized from DIPE, yielding 2.85 g (65%) of (+-)-cis-1-(3,5-dimethylbenzoyl)-4-[[1-[(4-fluorophenyl)methyl]-1H-benzimidazol-2-yl]oxy]-2-(phenylmethyl)piperidine (comp. 70; mp. 154.1 C.).

The synthetic route of 84946-20-3 has been constantly updated, and we look forward to future research findings.

Reference of 84946-20-3,Some common heterocyclic compound, 84946-20-3, name is 2-Chloro-1-(4-fluorobenzyl)-1H-benzo[d]imidazole, molecular formula is C14H10ClFN2, 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 4 8-[1-(4-Fluorobenzyl)-1H-benzimidazol-2-yl]-1,4-dioxa-8-azaspiro[4.5]decane (2) A mixture formed by 50 g of 2-chloro-1-(4-fluorobenzyl)benzimidazol, 41 g of 1,4-dioxa-8-azaspiro[4.5]decane and 84 mL of diisopropylethylamine in 350 mL of isoamylic alcohol is heated under reflux for 48 hours. Once the reaction has finished, 175 mL of solvent are distilled and slowly cooled to a temperature of 0-5C so that a white solid precipitates. The precipitate produced is filtered and washed with 75 mL of cold isoamylic alcohol, and is dissolved again in 250 mL of water and 250 mL of ethyl acetate. It is stirred, and the organic phase is isolated by decanting. The product is isolated by removing the solvent under reduced pressure, obtaining 60 g of 8-[1-(4-fluorobenzyl)-1H-benzimidazol-2-yl]-1,4-dioxa-8-azaspiro[4.5]decane (2).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-Chloro-1-(4-fluorobenzyl)-1H-benzo[d]imidazole, its application will become more common.

Reference:
Patent; Ragactives, S.L.; EP1564212; (2005); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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. 84946-20-3 name is 2-Chloro-1-(4-fluorobenzyl)-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. 84946-20-3

EXAMPLE 20 To a stirred mixture of 3.5 parts of ethyl 4-hydroxy-1-piperidinecarboxylate and 135 parts of N,N-dimethylformamide was added 1 part of a sodium hydride dispersion 50% and stirring was continued for 2 hours at room temperature. After the addition of 5.2 parts of 2-chloro-1-[(4-fluorophenyl)methyl]-1H-benzimidazole, the whole was further stirred overnight at room temperature. The reaction mixture was poured into ice water and the product was extracted with trichloromethane. The extract was dried, filtered and evaporated. The residue was crystallized from 2,2′-oxybispropane, yielding 2.5 parts (31.5%) of ethyl 4-[[1-[(4-fluorophenyl)methyl]-1H-benzimidazol-2-yl]oxy]-1-piperidinecarboxylate; mp. 94.0 C. (26).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2-Chloro-1-(4-fluorobenzyl)-1H-benzo[d]imidazole, and friends who are interested can also refer to it.

Reference:
Patent; Janssen Pharmaceutica, N.V.; US4695575; (1987); A;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

84946-20-3, Adding some certain compound to certain chemical reactions, such as: 84946-20-3, name is 2-Chloro-1-(4-fluorobenzyl)-1H-benzo[d]imidazole, can increase the reaction rate and produce

Step C; 1-(4-fluorobenzyl) 2-piperazinyl benzimidazole In 168 ml xylene 40.8 g anhydrous piperazine and 60 g 2-chloro (4-fluorobenzyl) benzimidazole are added. The mixture is heated to 80 C. for 10 hours. When the reaction is no longer evoluting, the temp

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 84946-20-3.

Reference:
Patent; Laboratoire Theramex S.A.; US5461059; (1995); A;,
Imidazole – Wikipedia,
Author Jessica.FPosted on November 18, 2020Categories 84946-20-3, imidazoles-derivativesTags M.W=200-300

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. 84946-20-3 name is 2-Chloro-1-(4-fluorobenzyl)-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. 84946-20-3

Example 4; A/-[3-(1-{3-[1-(4-Fluoro-benzyl)-1H-benzoimidazol-2-ylamino]-propyl}-piperidin-4-yl)-phenyl]-acetamide; 2-Chloro-1-(4-fluoro-benzyl)-1H-benzoimidazole (58 mg, 0.22 mmol) and A/-{3-[1-(3-Amino-propyl)-piperidin-4-yl]-phenyl}-acetamide (Example 1 Step 2, 90 mg, 0.33mmol) were mixed in ethanol (1 ml) and heated in the micro wave at 150 C for 2h.The reaction was extracted with dichloromethane and Na2CO3(aq) and the combinedorganic phases was dried over Na2SO4, filtered, and evaporated giving the crudeproduct which was purified by chromatography (silica,dichloromethane/methanol/ammoniac, 9:1:1%) giving the title compound Example 4.1H-NMR (300 MHz, CDCI3); 8 7.5.1 (d, 1H), 7.38 (s, 1H), 7.10-7.31 (m, 6H), 6.92-7.02(m, 4H), 6.79 (d, 1H), 6.61 (br s, 1H), 5.17 (s, 2H), 3.71 (t, 2H), 3.14 (d, 2H), 2.62 (t,2H), 2.48-2.61 (m, 1H), 2.21 (s, 3H) 2.06-2.15 (m, 2H), 1.91-2.00 (m, 2H), 1.65-1.86(m, 4H).LCMS: Rt 3.48 min, m/z 499.6 [M+].

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2-Chloro-1-(4-fluorobenzyl)-1H-benzo[d]imidazole, and friends who are interested can also refer to it.

Reference:
Patent; 7TM PHARMA A/S; WO2006/10446; (2006); A2;,
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. 84946-20-3, name is 2-Chloro-1-(4-fluorobenzyl)-1H-benzo[d]imidazole, A new synthetic method of this compound is introduced below., 84946-20-3

A mixture of 14 2-chloro-1-(4-fluorobenzyl)-1H-benzo[d]imidazole (2) (261mg, 1mmol) and 133 tert-butyl 3-aminopyrrolidine-1-carboxylate (370muL, 2mmol) in NMP (2mL) was heated at 180C under microwave for 60min. After cooling down to room temperature, the mixture was treated with a saturated 134 NaHCO3 solution and extracted with EtOAc. The combined organic phases was washed with water (2 times), dried over Na2SO4, and evaporated in vacuo. The crude residue was purified by silica gel flash column chromatography to afford the 135 title compound 18 (168mg, 54%). 1H NMR (300MHz, CDCl3) delta=7.53 (d, J=7.8Hz, 1H), 7.18-7.05 (m, 3H), 7.05-6.91 (m, 4H), 5.20 (s, 2H), 3.77-3.60 (m, 3H), 3.54 (ddd, J=9.7, 7.9, 6.2Hz, 1H), 3.26 (dd, J=9.4, 4.1Hz, 1H), 2.25 (br s, 2H), 2.18-2.06 (m, 1H), 1.79-1.65 (m, 1H)ppm. 13C NMR (75MHz, CDCl3) delta=162.11 (d, J=246.1Hz), 156.76, 142.16, 135.93, 132.52 (d, J=3.1Hz), 127.43 (d, J=8.0Hz), 121.98, 120.25, 116.76, 115.87 (d, J=21.6Hz), 108.28, 58.73, 51.21, 48.95, 47.08, 34.70ppm. HRMS m/z [M+H]+ calcd for C18H20FN4: 311.1666, found: 311.1662.

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; Tian, Junjun; Vandermosten, Leen; Peigneur, Steve; Moreels, Lien; Rozenski, Jef; Tytgat, Jan; Herdewijn, Piet; Van den Steen, Philippe E.; De Jonghe, Steven; Bioorganic and Medicinal Chemistry; vol. 25; 24; (2017); p. 6332 – 6344;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem