Month: May 2021

Related Products of 33016-47-6, A common heterocyclic compound, 33016-47-6, name is 1-Trityl-1H-imidazole-4-carbaldehyde, molecular formula is C23H18N2O, 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.

In a 100 ml, three-necked flask fitted with a magnetic stirrer, under inert atmosphere, ethyl iodide (1.1 ml, 0.0136 mol) is dissolved in Et2theta (25 ml). At -70 0C, a1.5 M solution of t-BuLi in pentane (17 ml, 0.026 mol) is added dropwise. The mixture is stirred 0.3 h at this temperature and 0.75 h at room temperature. A solution of 1-trityl-1 H- imidazole-4-carbaldehyde x43 (2 g, 0.00591 mole) in THF (25 ml) is added dropwise at 0 0C. The mixture is stirred for 1 h and poured onto ice. HCI is added until the pH is slightly acid (pH : 3-5) and the aqueous phase is extracted twice with Et^O. The combined organic phases are dried over MgSOphi filtered and concentrated to dryness. The crude product is purified by chromatography on silicagel (CH2Cl2/MeOH/NH4thetaH: 95/4.5/0.5 (v/v/v)) to afford 1.21 g of 1-(1-trityl-1H-imidazol-4-yl)propan-1-ol x88. Yield: 56 %.LC-MS (MH+): 369.

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.

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., Quality Control of 2,2,2-Trifluoro-1-(1H-imidazol-1-yl)ethanone

Step 4 Preparation of 6-chloro-5,6-dihydro-3-trifluoroacetyl-4H-thieno[2,3-b]thiopyran-4-one The compound from Step 3 (1.03 g, 5.0 mmol) was dissolved in tetrahydrofuran (50 mL) and cooled to -78 C. A solution of sodium bistrimethylsilylamide (5.0 mL of a 1.0M tetrahydrofuran solution) was added and the reaction stirred for 0.75 hours at -78 C. Trifluoroacetyl imidazole (0.68 mL, 6.0 mmol) was added and the reaction was warmed to room temperature and stirred under a nitrogen atmosphere for 16 hours. At this time, 1N hydrochloric acid (300 mL) was added to the reaction followed by extraction with ether (350 mL). The organics were washed with brine (200 mL), dried over MgSO4 and concentrated in vacuo. The resulting yellow oil was used without further purification.

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.

Electric Literature of 66121-69-5, These common heterocyclic compound, 66121-69-5, name is 1-Methyl-1H-imidazole-4-carbonitrile, 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.

4.1.3 Compounds with formula 3 according to Scheme 1a: Synthesis of 1-(1-Methyl-1H-imidazol-4-yl)-ethanone (3.3) for Example 2-16, 18, 19, 22, 26-28, 32-101, 103-175 43.4 ml 1.4M methylmagnesiumbromide in toluene were added dropwise to a mixture of 5.0 g 1-methyl-1H-imidazole-carbonitrile in 70 ml diethylether at 0 C. After 30 min, the mixture was warmed up to ambient temperature. After 1 h the reaction was quenched with 1M aqueous HCl solution and neutralised with saturated sodium bicarbonate solution. The reaction mixture was extracted with dichloromethane. The combined organic extracts were dried with magnesium sulfate and concentrated under reduced pressure. The crude material was purified by flash chromatography (dichloromethane/methanol=98/2) to give the intermediate 3.3. Yield: 4.8 g of 3.3 (75% content; 62% of theory); Analysis: [M+H]+=125

Statistics shows that 1-Methyl-1H-imidazole-4-carbonitrile is playing an increasingly important role. we look forward to future research findings about 66121-69-5.

Reference of 693-98-1,Some common heterocyclic compound, 693-98-1, name is 2-Methyl-1H-imidazole, molecular formula is C4H6N2, 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: Aryl halide (1.0mmol), amine (1.5-2.0mmol), PNP-SSS (0.6mol%; 0.023g), K2CO3 (2mmol), and DMF (3.0mL) was placed in a 25mL flask equipped with a magnetic stirring bar and heated at 120C under nitrogen gas. The reaction was then monitored by TLC until the consumption of aryl halide was detected. After completion of the reaction 5mL of water and 5mL of ethyl acetate were added to the reaction mixture. The organic solution was extracted and dried over anhydrous Na2SO4. After removing of organic solvent the crude product was obtained. For further purification the chromatography technique was used.

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

Electric Literature of 614-97-1,Some common heterocyclic compound, 614-97-1, name is 5-Methyl-1H-benzo[d]imidazole, molecular formula is C8H8N2, 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.

Charged benzimidazole (III) (5.115 mmoles), 2-bromo-thiophene-2-carboxamide (VIII) (3.938 mmoles), cesium carbonate (7.161 mmoles), cuprous oxide (0.307 mmoles), 4,7- dimethoxy-l,10-phenathroline (0.716 mmoles), PEG (5.115 mmoles) and DMSO to the RB flask fitted with thermo well and condenser. The reaction was heated to 110-1150C under magnetic stirring for 24 hours. After completion of reaction cooled to room temperature, dichloromethane (500 ml) added and filtered through a celite bed, washed the bed with dichloromethane (100 ml X 2), distilled off the solvent completely under reduced pressure. Aq. ammonia (10 ml) was added to the residue and extracted with ethyl acetate (250 ml X 3).Dry the ethyl acetate layer with sodium sulfate, distilled completely to get the crude compound. The crude compound is then purified by using silica gel 60-120 mesh column chromatography and DCM: MeOH 100-5 % as mobile phase to get the pure compound. (Some compounds are isolated by preparative HPLC purification method.

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

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. 152628-03-0, name is 4-Methyl-2-propyl-1H-benzo[d]imidazole-6-carboxylic acid, A new synthetic method of this compound is introduced below., Recommanded Product: 152628-03-0

Compound IIc (534 mg, 2.45 mmol) was slowly added to polyphosphoric acid (15 mL) heated to 80 & lt; 0 & gt; C, stirred and heated to 150 & lt; 0 & gt; C.Compound IIIb (320 mg, 2.94 mmol) was slowly added to the polyphosphoric acid solution of the former several times, and the mixture was stirred at 150 C for 12 h. After completion of the reaction, the reaction solution was poured into 100 mL of ice water and adjusted to pH 8-10 with concentrated aqueous ammonia. A large amount of precipitate appeared, filtered and the filter cake was washed three times with 5% ethanol solution.After drying the filter cake, the resulting filter cake was purified by chromatography to give about 357 mg (yield 58.7%) of the pale yellow compound IVb.

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.

Related Products of 57667-50-2, 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. 57667-50-2 name is 1-Propyl-1H-benzo[d]imidazol-2-amine, 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.

5-Bromo-N-(1-propyl-1H-benzo[d]imidazol-2-yl)isophthalamide 13. A mixture of 5-bromoisophthalic acid (100 mg, 4.1 mumol), N-propylaminobenzamidazole (72 mg, 4.1 mumol), N-hydroxysuccinimide (56 mg, 4.9 mumol), DMAP (5 mg, 0.4 mumol) and EDC (234 mg, 1.2 mmol) were dissolved in methylene chloride (5 mL), treated with Hunig’s base (53 mg, 4.1 mumol) and stirred for 1 d to give 12. The reaction mixture was then treated with 9/1 MeOH/NH4OH (5 mL) and stirred for 2 h. The mixture was concentrated to a solid, dissolved in DMSO, added to a column and chromatographed (50 g isco C18, 0 to 100% MeOH with 0.2% formic acid) to give 13 (71 mg, 43%) as a white powder. LC/MS gave a single peak with m/z=401.1 [M+1]+ and 823.1 [2M+Na]+. 1H-NMR (dmso-d6) delta 12.77 (br s, 1H), 8.65 (br s, 1H), 8.45 (br s, 1H), 8.22 (br s, 1H), 8.17 (br s, 1H), 7.54-7.60 (m, 3H), 7.28 (t, J=8 Hz, 1H), 7.24 (t, J=8 Hz, 1H), 4.27 (t, J=7 Hz, 2H), 1.85 (h, J=7 Hz, 2H), 0.92 (t, J=7 Hz, 3H).

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

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 33468-67-6 as follows. SDS of cas: 33468-67-6

A solution of ethyl 2-bromopropionate (3.98 g, 22 mmol), 4-chloro-5-methyl-3-(trifluoromethyl)-1H-pyrazole (3.00 g, 20 mmol), and K2CO3 (5.53 g, 40 mmol) in THF/DMF (2:1, 39 mL) was allowed to stir at 45 C. for 16 h. The mixture was then concentrated in vacuo and diluted with EtOAc (70 mL). The organic layer was washed with water and brine, dried over MgSO4, filtered, and concentrated in vacuo to give the product (5.3 g) as a colorless oil that was used without further purification.

According to the analysis of related databases, 33468-67-6, the application of this compound in the production field has become more and more popular.

Related Products of 17289-26-8, These common heterocyclic compound, 17289-26-8, name is 1-Methyl-1H-imidazole-4-carbaldehyde, 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: Synthesis of 4-ethynyl-1-methyl-1H-imidazole A solution of l-methyl-1H-imidazole-4-carbaldehyde (2 g, 1 eq) in MeOH (180 ml) was cooled at 0 C. K2CO3(5.02 g, 2 eq) and dimethyl (1-diazo-2-oxopropyl)phosphonate (7.7 g, 2.2 eq) was added. The mixture was stirred for 4 hr at 0 C., and extracted with dichloromethane and water. The organic layer was washed with sat. aq. NH4Cl, dried over anhydrous MgSO4 and concentrated in vacuo. The residue was purified with column chromatography to prepare the title compound (1.2 g, 62%). 1H NMR (600 MHz, CDCl3-d1); delta7.60 (s, 1H), 7.32 (m, 1H), 3.37 (s, 3H), 3.48 (s, 1H). MS (ESI, m/z): 107.1 [M+H]+.

Statistics shows that 1-Methyl-1H-imidazole-4-carbaldehyde is playing an increasingly important role. we look forward to future research findings about 17289-26-8.

Synthetic Route of 17289-26-8,Some common heterocyclic compound, 17289-26-8, name is 1-Methyl-1H-imidazole-4-carbaldehyde, molecular formula is C5H6N2O, 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: The L-Proline or L-tert-Leucine-based amine was dissolved in DCM (2 M), followed by the additionof the imidazole based aldehyde (1-1.3 equiv.) and MgSO4H2O (1 g/5 mL solvent). The mixture wasstirred overnight at room temperature. Afterwards, solids were removed by filtration and the resultingsolution was concentrated in vacuo. The residue was dissolved in MeOH (2 M) and the solution wascooled to 0 C. NaBH4 (3 equiv.) and a catalytic amount of conc. HCl were added to this solution. Themixture was stirred for 30 min at 0 C, and 1 h at room temperature; after this period, an equal volumeof saturated NaHCO3 solution was added to quench the reaction. After washing with DCM and brine,the organic phase was separated, dried over anhydrous Na2SO4 and concentrated in vacuo to afford theraw product. Purification of the resulting raw material was carried out via column chromatography usingDCM and MeOH, eluted compound might be subsequently recrystallized from DCM and pentane.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 1-Methyl-1H-imidazole-4-carbaldehyde, its application will become more common.