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CAS No. : | 3347-62-4 | MDL No. : | MFCD00022385 |
Formula : | C10H10N2 | Boiling Point : | - |
Linear Structure Formula : | C6H5C3H2N2(CH3) | InChI Key : | QHRSESMSOJZMCO-UHFFFAOYSA-N |
M.W : | 158.20 | Pubchem ID : | 18774 |
Synonyms : |
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Chemical Name : | 3-Methyl-5-phenyl-1H-pyrazole |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
123 mg; 56 mg | With sodium hydroxide; In acetonitrile; at 20℃; for 2h; | General procedure: A mixture of (E)-4-phenylbut-3-en-2-one (1e) (146 mg, 1.0 mmol) and TsNHNH2 (205 mg, 1.1 mmol) in CH3CN (2 mL) were stirred at room temperature for 3 h and then CH3CN (2 mL), NaOH (44 mg, 1.1 mmol) were added and the mixture was heated at reflux for 17 h, then NaOH (60 mg, 1.5 mmol) and benzyl bromide (255 mg, 1.5 mmol) were subsequently added and the mixture was stirred at room temperature for 2 h. The product was extracted with Et2O and the organic layer was washed with brine, dried over anhydrous MgSO4, filtered, and concentrated in vacuo. Purification by chromatography on silica gel afforded the desired product 4s as white crystalline solid (194 mg, 78% yield). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With bromine; In dichloromethane; at 0 - 20℃; for 2.5h; | To a solution of 5-methyl-3-phenyl-lH-pyrazole (8.0 g, 50.6 mmol) in dichloromethane(150 mL) was added bromine (8.08 g, 50.6 mmol) dropwise at 0 0C. The reaction was stirred at that temperature for 30 min and continued at room temperature for 2 h. After the reaction was quenched with an aqueous solution OfNa2SO3 (10% w/w, 10 mL), the organic solvent was removed and the aqueous mixture was extracted with EtOAc, washed with brine, dried over MgSO4, and concentrated. The residue was purified by silica gel column chromatography to give the title compound as a yellow oil (9.5 g). LCMS mlz = 236.9 (M+H4). 1H NMR (400 MHz, DMSO-J6) delta ppm 2.26 (s, 3H), 7.30-7.57 (m, 5H), 13.12 (s, IH). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With hydrogenchloride; hydrazine; In dichloromethane; N,N-dimethyl-formamide; acetonitrile; | Step C]: [1,1-Dimethyl-3-(5-methyl-3-phenyl-pyrazol-1-yl)-propyl]-carbamic Acid Tert-Butyl Ester 5-Methyl-3-phenyl-1H-pyrazole (320 mg, prepared from benzoylacetone and hydrazine according to Ali et al., Pak. J. Sci. Ind. Res. 1993, 36 (12), 502) was dissolved in DMF (7 ml) and cooled to 0 C. with an ice bath. Potassium-tert-butoxide (284 mg) was added in portions and the mixture was stirred for 45 min at 0 C. Then, 4,4-dimethyl-2,2-dioxo-2lambda'-[1,2,3]oxathiazinane-3-carboxylic acid tert-butyl ester (617 mg) was added in one portion and the reaction mixture was allowed to stir for 20 hours at RT. HCl (1N aqueous solution, 10 ml) was added and stirring was continued for 15 minutes. The mixture was diluted with ether, washed with water and brine (the aqueous layers were re-extracted twice with ether), dried and evaporated. The crude product was purified by flash chromatography (0 to 15% gradient of CH3CN in CH2Cl2) to give the desired product as a yellow gum. Yield: 545 mg. A regioisomer present in minor amounts was removed in the chromatographic purification step. MS (ISP): 344.5 (MH+) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Example 112 (2S)-1-[(1S)-1-Methyl-2-(5-methyl-3-phenyl-pyrazol-1-yl)-ethylamino]-acetyl}-pyrrolidine-2-carbonitrile The title compound was obtained in analogy to example 78, steps C] to E] from <strong>[3347-62-4]5-methyl-3-phenyl-1H-pyrazole</strong> by replacing sulfimidate XIX with IV and with the exception, that the final coupling step with IIA was done as described in example 1. The title compound was obtained as the free amine as a glass. MS (ISP): 352.4 (MH+). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
12% | With 40% KF/Al2O3 ;18-crown-6 ether; In dimethyl sulfoxide; at 120℃; for 48h; | A compound wherein a methyl group was introduced into the 5-position of the pyrazole ring of XO-TT469 was synthesized. A pyrazole, XO-TT485, was prepare by condensation reaction of 1-phenyl-1,3-butanedione and hydrazine. And a 4-phenylcarboxylic acid unit was introduced (the following scheme).; XO-TT486A; XO-TT485 (300 mg, 1.90 mmol) was dissolved in dimethyl sulfoxide (10 mL), and to the solution were added 40% potassium fluoride-alumina (600 mg), methyl 4-fluorobenzoate (492 mL, 3.80 mmol) and 18-crown-6 (100 mg, 0.380 mmol). The mixture was stirred at 120C for 2 days. To the reaction mixture was added water, and the mixture was extracted with ethyl acetate. The residue was purified by column chromatography on silica gel (hexane : ethyl acetate = 10 : 1 to 5 : 1) to give XO-TT486A as a white solid (64.9 mg, 12% yield). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
59.6% | Sodium hydride (2.5 g, 1.5 g NaH, 62 mmol, 1.1 equiv) is added over aperiod of 3 min to a solution of 5-methyl-3-phenyl-lJ7-pyrazole (9.00 g, 56.9 mmol,1 equiv) in DMF (90 mL) cooled to 0 C in an ice bath. After stilling 15 min, ethylenecarbonate (7.6 mL, 10 g, 110 mmol, 2.0 equiv) is added. The bath is removed, and thereaction mixture is stirred for 15 h. The mixture is treated with 4 M aq K2CO3 (90 mL),heated at reflux for 5 h, and diluted with H2O (200 mL). After allowing the hot mixtureto cool for 15 min, more H2O (100 mL) and then hexanes (100 mL) are added. Themixture is shaken vigorously and then allowed to separate. Crystals formed and stayedwith the top organic layer. The aqueous layer is separated, and the crystals are collectedby vacuum filtration and washed with hexanes (2x50 mL). The crystals are dissolved inEt2O/EtOAc (1:1; 200 mL), and the solution is dried (Na2SO4), filtered, and concentrated(75 C) to give the title compound as an off-white crystalline solid (6.86 g, 59.6%).HRMS Calculated for Ci2Hi5N2O: m/z 203.1 184. Found: 203.1 168 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
To a solution of acetophenone (10 g, 83 mmol) in anhydrous toluene (10 mL) was added LiHMDS (1.0 M in THF, 83 mL, 83 mmol) via syringe at 0 0C under argon. After 5 min, acetyl chloride (6.53 g, 83 mmol) was added in one portion via syringe. The ice bath was removed and glacial AcOH (5 mL), EtOH (50 mL), and hydrazine hydrate (12.50 g, 250 mmol) were added. The mixture was refluxed for 2 h. After cooled to room temperature, the reaction was neutralized to pH 7 by adding 1.0 M NaOH solution. The mixture was extracted with EtOAc, washed with brine, dried over MgSO4, and concentrated. The residue was purified by silica gel column chromatography to give the title compound as a pale yellow oil (12.05 g). LCMS mlz = 159.0 [M+H]+; 1H NMR (400 MHz, DMSO-J6) delta ppm 2.25 (s, 3H), 6.42 (s, IH), 7.20-7.44 (m, 3H), 7.67-7.82 (m, 2H), 12.53 (bs, IH). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
36% | With copper(II) acetate monohydrate; caesium carbonate; In N,N-dimethyl-formamide; at 110℃; for 24h;Inert atmosphere; | General procedure: To a solution of Cu(OAc)2·H2O (0.01 mmol) in DMF (2 mL) were added aryl iodide (1.2 mmol), nitrogen-containing heterocycle (1.0 mmol), and Cs2CO3 (2 mmol) under nitrogen atmosphere. The mixture was stirred at 110 C for 24 h. After cooling to ambient temperature, the mixture was partitioned between water and ethyl acetate. The organic layer was separated, and the aqueous layer was extracted with ethyl acetate. The combined organic layers were washed with brine, dried over Na2SO4, and concentrated in vacuo. The residue was purified by flash chromatography on silica gel. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
94% | With tetrabutylammomium bromide; toluene-4-sulfonic acid hydrazide; sodium hydroxide; In water; at 80℃; for 10h;Air atmosphere; | General procedure: A Schlenk tube with a magnetic stir bar charged with alpha,beta-unsaturated carbonyl compounds (0.5 mmol, 1 equiv), tosyl hydrazide (0.6 mmol, 1.2 equiv), NaOH (1.5 equiv), (n-Bu)4NBr (1.5 equiv). The reaction vessel was placed in an 80 C oil bath, and then stirring at this temperature for 10 h. The reaction mixture was then allowed to cool to ambient temperature, and diluted with 20 mL of ethyl acetate, and washed with brine (15 mL), water (15 mL), and then the organic layer was dried over Na2SO4. After concentrated in vacuo, the crude product was purified by column chromatography. The identity and purity of the known product was confirmed by 1H NMR, 13C NMR, and GC-MS. |
81% | With iodine; potassium carbonate; toluene-4-sulfonic acid hydrazide; In ethanol; at 75℃; for 2h;Green chemistry; | General procedure: To a stirred mixture of alpha,beta-unsaturated aldehydes/ketones 1 (0.5 mmol) and TsNHNH2 (0.6 mmol) in EtOH (2.0 ml) was added molecular iodine (2.5 mg, 2 mol%) in an oven-dried flask, and then the reaction was heated to 75 C for 10 min followed by the addition of K2CO3 immediately. The reaction proceeded under an air atmosphere for 1.5-2.0 h until complete consumption of starting material as monitored by TLC. The reaction mixture was concentrated under vacuum and the crude product was purified by column chromatography using petroleum ether/ethyl acetate as eluent to provide the product 2. |
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3-(m-Tolyl)-1H-indazol-5-amine
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