Tag: M.W:200-300

13599-12-7, name is Ethyl 3-phenyl-1H-pyrazole-5-carboxylate, belongs to pyrazoles-derivatives compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. COA of Formula: C12H12N2O2

General procedure: Pyrazole 1a-c (0.012 mol), the corresponding o-chloronitrobenzene 2a-c (0.012 mol) and powdered K2CO3 (0.50 mg, 0.036 mol) were successively mixed in DMF (3 ml). The reaction mixture was stirred at 50-80C for 3-6 h (TLC monitoring).The mixture was cooled, and water (5 ml) was added with stirring. The precipitate that formed was filtered off and recrystallized from ethanol.

The synthetic route of 13599-12-7 has been constantly updated, and we look forward to future research findings.

Some common heterocyclic compound, 39806-90-1, name is 4-Iodo-1-methyl-1H-pyrazole, molecular formula is C4H5IN2, 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. Quality Control of 4-Iodo-1-methyl-1H-pyrazole

To a cooled (-70 C) solution of cis-7-fluoro-N-methoxy-N-methyl-5-phenyl- 6,7-dihydro-5H- pyrrolo[l ,2-b] [l ,2,4]triazole-2-carboxamide (137 mg, 0.47 mmol) and l -methyl-4-iodo-lh-pyrazole (393 mg, 1.89 mmol) in tetrahydrofuran (10 mL) was added dropwise tert-butyllithium (1.3 M in hexane, 1.45 mL, 1.89 mmol) under a nitrogen atmosphere. The mixture was stirred at -70 C for 1 h and then quenched by addition of saturated aqueous ammonium chloride (10 mL). The resulting mixture was extracted with ethyl acetate (2 x 10 mL). The combined organic layers were concentrated under reduce pressure and the residue was purified by RP-HPLC (acetonitrile 27- 57%/0.05% hydrochloride in water) to afford cis racemic (l -methylpyrazol-4-yl)-[rac-(5R,7R)-7- fluoro-5-phenyl-6,7-dihydro-5H-pyrrolo[l ,2-b][l ,2,4]triazol-2-yl]methanone (53.4 mg, 36%) as a white solid. H NMR (400 MHz, CD3OD) delta 8.61 (s, 1H), 8.24 (s, 1H), 7.46 – 7.34 (m, 3H), 7.32 – 7.25 (m, 2H), 6.22 – 6.19 (m, 0.5H), 6.08 – 6.05 (m, 0.5H), 5.72 – 5.65 (m, 1H), 3.93 (s, 3H), 3.85 – 3.70 (m, 1H), 2.90 – 2.75 (m, 1H). LCMS RT= 0.791 min, m/z = 31 1.9 [M + H]+. LCMS (5 to 95% acetonitrile in water + 0.03%o trifluoacetic acid over 1.5 mins) retention time 0.791 min, ESI+ found [M+H] = 311.9.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 39806-90-1, its application will become more common.

Electric Literature of 1280210-79-8, These common heterocyclic compound, 1280210-79-8, name is tert-Butyl 4,6-dihydropyrrolo[3,4-c]pyrazole-5(2H)-carboxylate, 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.

INTERMEDIATE 12; 2-(( clopropylsxrffonylV2.4.5.6-tetrahvdropyrrolof3.4-c]pyrazole trifluoroacetic acid salt Step A: fe^Bu 2-(cyclopen sulfonYl>2.6-^carboxylateTo a suspension of sodium hydride (60% dispersion in oil, 1.55 g, 38.7mmol) in anhydrous acetonitrile (200 mL) was added to terf-butyl 2,6-dihyclropyrrolo[3,4-c]pyrazole- 5(4H)-carboxylate (5.3 g, 25.5 mmol) in one portion under nitrogen at room temperature. The reaction mixture was stirred at room temperature for 2 h. To the resulting white suspension was slowly added cyclopropanesulfonyl chloride (6.9 g, 49.1 mmol) and the mixture was stirred at room temperature for 18 h, quenched with water (120 mL) and the layers were separated. The aqueous layer was then extracted with dichloromethane (2 x 100 mL). The combined organic layers were dried over anhydrous sodium sulfate and concentrated under reduced pressure. The crude material was purified on silica chromatography (300 g Biotage column) and eluted with 15-80% ethyl acetate in hexanes to yield the title compound and ter/-butyl 1- (cyclopentyisulfonyl)-2,6-dihydropyrrolo[3,4-c]pyrazole-5(4H)-carboxylate as a white solid. LC/MS: 314.2(M+1).

The synthetic route of 1280210-79-8 has been constantly updated, and we look forward to future research findings.

These common heterocyclic compound, 10250-64-3, name is 1-Methyl-3-phenyl-1H-pyrazole-5-carboxylic acid, 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. SDS of cas: 10250-64-3

General procedure: To a solution of 19 (1.2 eq) and HOBt(1.4 eq) in DMF (0.5 M) were added EDCI (1.3 eq) and a solution of 15a-j or 16a-j (1.0 eq) in DMF (0.25 M), Et3N (3.5 eq) at 0 C. The reaction mixture was stirred at room temperature for 24 hours, then diluted in AcOEt. The organic phase was washed with water twice, saturated aqueous NaHCO3 three times, and brine, then dried over Na2SO4,filtered, and concentrated. The residue was purified by flash column chromatography to give intermediates 17a-j and 18a-j.

The synthetic route of 1-Methyl-3-phenyl-1H-pyrazole-5-carboxylic acid has been constantly updated, and we look forward to future research findings.

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. 1145-01-3, name is 3,5-Diphenyl-1H-pyrazole, A new synthetic method of this compound is introduced below., Product Details of 1145-01-3

A solution of ethyl 3,5-diphenyl-1-hydropyrazole (0.20 mmol ), tert-butyl alpha-diazoacetoacetate ( 0.25 mmol) was added in a 25 mL Schrocker tube at room temperature,[Cp * RhCl2] 2 (0¡¤01 mmol), AgSbF6 (0.04 mmol) and tetrahydrofuran (2.00 mL) were added and argon was bubbled through argon for 2 minutes. Tighten the lid. Stir at 60 C for 24 hours. The reaction was stopped and concentrated under reduced pressure to give a crude product. The column was finally rinsed with a mixture of petroleum ether and ethyl acetate and subjected to rapid column chromatography (silica gel column) to give the corresponding nitrogen-containing fused heterocyclic compound (60 mg of white solid, 84% yield).

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.

34091-51-5, name is 5-Iodo-1-methyl-1H-pyrazole, belongs to pyrazoles-derivatives compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. name: 5-Iodo-1-methyl-1H-pyrazole

General procedure: A solution of 3-bromopyridine (0.38 g, 2.40 mmol), 2-cyclohex-1-en-1-yl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (0.50 g, 2.40 mmol), tetrakis(triphenylphosphine)palladium (0) (0.14 g, 0.12 mmol) and cesium carbonate (1.72 g, 5.29 mmol) in 1,4-dioxane (8.0 mL) and water (4.0 mL) was stirred at 90 C. for 4 hours. After allowing to cool, the reaction solution was subjected to extraction with ethyl acetate (50 mL), and the organic layer was dried over anhydrous sodium sulfate. After vacuum concentration, the residue was purified with column chromatography (hexane/ethyl acetate=2:1) to yield the title compound (347.3 mg, 99%) as a colorless oil. The reaction and aftertreatment were conducted in the same manner as in Example 39a by using 5-iodo-1-methyl-1H-pyrazole (1.90 g, 9.14 mmol), 2-(4,4-difluorocyclohex-1-en-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1.00 g, 4.10 mmol), tetrakis(triphenylphosphine)palladium (0) (240 mg, 0.208 mmol), cesium carbonate (2.70 g, 8.29 mmol), 1,4-dioxane (10 mL) and water (5 mL), to yield the title compound (767 mg, 94%) as a colorless oil. 1H-NMR (500 MHz, CDCl3) delta ppm: 2.13-2.22 (2H, m), 2.56-2.60 (2H, m), 2.73 (2H, t, J=14.2 Hz), 3.86 (3H, s), 5.73 (1H, brs), 6.14 (1H, d, J=2.0 Hz), 7.42 (1H, d, J=2.0 Hz)

The synthetic route of 34091-51-5 has been constantly updated, and we look forward to future research findings.

Related Products of 56426-35-8, 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. 56426-35-8 name is Methyl 5-phenyl-1H-pyrazole-3-carboxylate, 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.

Intermediate 96 (320mg, 1.S8mmol) was dissolved in THF/water (l5mL, 1:1), lithiumhydroxide monohydrate (146mg, 3.48mmol) was added and the reaction mixture wasstirred for 2h. The THF was removed in vacuo and the aqueous solution was acidified to pH 1 with 1M aq HC1. The precipitate was collected by filtration to give the title0 . + +compound (232mg, 78/o) as a yellow solid. LCMS: ES 189.0 [IVIH]

At the same time, in my other blogs, there are other synthetic methods of this type of compound, Methyl 5-phenyl-1H-pyrazole-3-carboxylate, and friends who are interested can also refer to it.

Electric Literature of 1222174-92-6, 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. 1222174-92-6, name is Methyl 5-bromo-1-methyl-1H-pyrazole-3-carboxylate belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

A solution of intermediate 2a (515 mg), 2,5-dimethoxyphenylboronic acid (642 mg) and Pd(dppf)CI2-CH2CI2 ( 05 mg) in a mixture of THF (15 mL) and sodium carbonate solution (2 M, 3 mL) was heated in a microwave (Biotage) to 100 C for 1.5 h. The mixture was chilled, the layers separated and the aqueous layer was extracted with EtOAc. The combined organic layers were dried and the volatiles were removed under reduced pressure. The residue was purified by chromatography (Interchim cartridge 50SiHP / 25 g, Cy / EtOAc) to yield the desired compound (77% yield). LC-MS (Method 2): m/z [M+H]+ = 277.1 (MW calc. = 276.29); R, = 0.62 min.

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, Methyl 5-bromo-1-methyl-1H-pyrazole-3-carboxylate, other downstream synthetic routes, hurry up and to see.

Synthetic Route of 1280210-79-8,Some common heterocyclic compound, 1280210-79-8, name is tert-Butyl 4,6-dihydropyrrolo[3,4-c]pyrazole-5(2H)-carboxylate, molecular formula is C10H15N3O2, 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.

A vial was charged with (3R,3aR,6R,6aR)-6-[5-(4-bromophenyl)-6-chloro-1-(2-trimethylsilylethoxymethyl)imidazo[4,5-b]pyridin-2-yl]oxy-2,3,3a,5,6,6a-hexahydrofuro[3,2-b]furan-3-ol (501.8 mg, 0.861 mmol), tert-butyl 4,6-dihydro-2H-pyrrolo[3,4-c]pyrazole-5-carboxylate (240.3 mg, 1.148 mmol), tripotassium phosphate (581.6 mg, 2.74 mmol), and copper (I) iodide (37.2 mg, 0.195 mmol). The vial was evacuated (3¡Á) and backfilled with nitrogen. Trans-N,N?-dimethylcyclohexane-1,2-diamine (55 mul, 0.348 mmol) and dioxane (1.7 ml) were added to the vial to give a hazy suspension that was heated to 100 C. for 24 h. The reaction mixture was cooled to room temperature and partitioned between EtOAc (100 ml) and water (100 ml). The aqueous layer was extracted with EtOAc (2¡Á50 ml). The organic layers were combined, washed with brine (1¡Á30 ml), dried over MgSO4, filtered, and evaporated under reduced pressure to give a pale green residue. Flash chromatography of the residue utilizing a 40 g silica RediSep Rf column and employing a 0-100% EtOAc/hexane gradient afforded a mixture of the two pyrazole linked regioisomers as a pale amber foam. LC-MS: calculated for C34H43ClN6O7Si 710.27 observed m/e: 711.29 (M+H)+ (Rt 1.30/2 min)

The synthetic route of 1280210-79-8 has been constantly updated, and we look forward to future research findings.

Synthetic Route of 706819-66-1, These common heterocyclic compound, 706819-66-1, name is 2-Bromo-1-(1-methyl-1H-pyrazol-4-yl)ethanone, 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.

General procedure: To a solution of 2-bromo-1-phenylethan-1-one (11a, 5.0 g, 25.12 mmol) and 2-chloropyridin-4-ol (3.9 g, 30.11 mmol) in acetone (75 mL) was added K2CO3 (5.2 g, 37.62 mmol). The reaction mixture was stirred overnight at room temperature. After completion, the mixture was poured into water and extracted with ethyl acetate. The organic layers were combined and then dried with anhydrous sodium sulfate. After removal of the solvent, the residue was purified by a silica gel column chromatography to afford title compound 12a (5.5 g, 88%).

The synthetic route of 706819-66-1 has been constantly updated, and we look forward to future research findings.