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CAS No. : | 7463-31-2 | MDL No. : | MFCD00032278 |
Formula : | C10H11NO2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | AFZTYHRVDOKRKV-UHFFFAOYSA-N |
M.W : | 177.20 | Pubchem ID : | 346202 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
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* 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 |
---|---|---|
100% | In dichloromethane at 20℃; Inert atmosphere; | |
99% | With pyridine at 20℃; for 1h; | |
96.8% | In toluene at 20 - 55℃; for 1h; | 1 Example 1; Preparation of N-(3-Acetylphenyl)acetamide To a suspension of 3' - aminoacetophenoe (50. 9 g, 377 mmol) in toluene (250 ml) was added dropwise acetic anhydride (39. 6 g, 388 mmol) at room temperature, and the mixture was kept at 55°C for one hour and then cooled to a temperature not more than 20°C. The crystals separated were filtered to give the objective compound (64.58 g ; 96. 8% yield) as a pale yellow powder. |
95% | With zinc(II) oxide at 20℃; for 0.25h; | |
92% | Stage #1: acetic anhydride; 1-(3-aminophenyl)ethanone In ethyl acetate at 20℃; for 7h; Inert atmosphere; Stage #2: With potassium carbonate In ethyl acetate at 20℃; Inert atmosphere; | |
92% | With pyridine for 0.5h; Heating; | |
90% | In neat (no solvent) at 20℃; for 0.133333h; | Catalytic tests General procedure: Alcohol, phenol, and/or amine (1 mmol) were added to amixture of the ZnAl2O4SiO2 nanocomposite (100 mg) andacetic anhydride (1 mmol). The mixture was stirred at 75 °C(for alcohols and phenols) or at room temperature (for amines)for a time. The progress of the reaction was monitored by TLCand/or GC-MS. When the reaction was completed, ethyl acetate(10 mL) was added and the mixture was filtered to separate offthe catalyst. The catalyst was washed twice with 7.5 mL ethylacetate. The combined organic phases were washed with a10% solution of NaHCO3 and then dried over MgSO4. The solventwas removed to yield the product. If further purificationwas needed, the product was passed through a short column ofsilica gel. All products were characterized on the basis ofGC-MS, FT-IR, and 1H-NMR spectral data by comparing thesespectra with those of standard samples or literature data. |
88% | With ZnAl2O4 nanoparticles at 20℃; for 0.166667h; Neat (no solvent); | |
82.8% | With triethylamine In toluene at 20 - 40℃; for 2h; | 2 Example 2; Preparation of N- (3-acetylphenyl) acetamide To a mixture of 3'-aminoacetophenone (10.0 g, 74.0 mmol), triethylamine (8. 98 g, 88.8 mmol) and toluene (50 ml) was added dropwise acetic anhydride (8.31 g, 81.4 mmol) at room temperature, and the mixture was kept at 30 to 40°C for 2 hours. The crystals separated were filtered at room temperature to give the objective compound (10.86 g; 82. 8% yield) as a pale yellow powder. |
72% | at 0 - 70℃; Inert atmosphere; | |
With acetic acid | ||
at 30℃; for 1h; | 4.2.2.1 Acetylation 40mmol of the appropriated amine was added carefully over 50mL of ice cooled acetic anhydride to avoid the temperature surpasses 30°C. After 1h, 200mL of cold distilled water was added, and the precipitated was filtered out and recrystallized from 40mL of ethanol. Mean yield of approximately 60%. | |
With dmap In dichloromethane at 20℃; | ||
With copper(ll) bromide In dichloromethane at 20℃; | 9 4.1.5.9. N-(3-(2-((3-(methylthio)phenyl)amino)thiazol-4-yl)phenyl)acetamide (4 i). 1-(3-aminophenyl)ethanone (50 mg, 0.37 mmol) was dissolved in CH2Cl2 (600 ml) then acetic anhydride (42 ml, 0.45 mmol) was added. The reaction was stirred at room temperature upon completeness. The reaction mixture was washed with 0.1N sodium carbonate, the organic phase was concentrated in vacuum and resuspended in ethyl acetate (1 ml) and CuBr2 (99 mg, 0.3 mmol) was added. The mixture was then stirred at reflux overnight. The organic phase was washed with H2O (2 x 2 ml),concentrated to obtain 1-(3-aminophenyl)-2-bromoethanone. The bromoketone (64 mg, 0.3 mmol) was resuspended in anhydrous EtOH (1 ml) and conjugated with 1-(3-(methylthio)phenyl)thioureaa (59 mg, 0.3 mmol) as previously described. The final product was purified by preparative HPLC, the peak of interest was concentrated to obtain the title compound. (96 mg, 73%) 1H NMR (300 MHz, CDCl3) δ 7.95-7.89 (m 1H), 7.60-7.50 (d, J 7.7 Hz, 2H), 7.40-7.29 (m, 3H), 7.24 (t, J 8.0 Hz, 1H), 7.10 (ddd, J 8.1, 2.2, 0.8 Hz, 1H), 6.93 (ddd, J 7.81.6, 0.9 Hz, 1H), 6.83 (s, 1H), 2.43 (s, 3H), 2.17 (s, 3H). 13C NMR (75 MHz, CDCl3) δ 168.5, 164.3, 150.7, 140.9, 140.3 ,138.3, 135.2, 129.8, 129.5, 122.1, 121.0, 119.6, 117.6, 115.7, 114.8, 102.7, 24.8, 15.7. ESI-MS m/z: 356.1 [M+H]+. | |
6.39 g | In toluene at 20 - 55℃; for 3h; | 87 Reference Production Example 87 Reference Production Example 87 (0853) To a mixture of 50 mL of toluene and 6.76 g of 3-aminoacetophenone, 4.7 mL of acetic anhydride was added dropwise, followed by stirring at room temperature for 2 hours and further heating and stirring at 55°C for one hour. After cooling to room temperature, filtration, and washing with toluene, the obtained residue was dried under reduced pressure to obtain 6.39 g of N-(3-acetylphenyl)acetamide (C87A). 1H-NMR (CDCl3) δ (ppm): 8.00 (1H, s), 7.92 (1H, d, J = 8.2 Hz), 7.69 (1H, d, J = 7.8 Hz), 7.61 (1H, bs), 7.43 (1H, t, J = 7.9 Hz), 2.61 (3H, s), 2.22 (3H, s). |
at 20℃; for 2h; | 33.a A) 3-Aminoacetophenone (50 g, 370 mmol) was dissolved in acetic anhydride (35 mL, 370 mmol) and stirred at room temperature for 2 hours. The acetic anhydride was evaporated under reduced pressure to give white crystals which were taken directly without further purification. | |
In dichloromethane at 0 - 20℃; Inert atmosphere; | ||
With dmap In dichloromethane |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | ||
70% | With triethylamine In dichloromethane at 20℃; for 2h; Inert atmosphere; | |
12% | In dichloromethane at 20℃; for 2h; |
With sodium hydroxide at 20℃; | ||
With triethylamine In N,N-dimethyl-formamide at 0℃; Inert atmosphere; | 4.2.2 General procedure for the synthesis of 7a-n and 8a-i General procedure: (i) To a solution of aminoacetophenones (5.0 mmol) in anhydrous DMF (10 mL) were added 1.0 equiv of the corresponding acyl chloride (5.0 mmol) and 1.2 equiv of triethylamine (6.0 mmol) at 0 °C in ice-bath under argon atmosphere, and the reaction was allowed to stir until all the starting material had disappeared. Then, the resulting mixture was acidified with 1 M HCl to PH<7 and extracted with ethyl acetate (3 times). The obtained organic phase was washed with 5 % NaHCO3 (2 times) and brine (2 times), dried over Na2SO4 and concentrated in vacuo to give the intermediates 5a-n and 6a-i, which was used directly for the next step. | |
With triethylamine In dichloromethane at 0 - 25℃; for 4h; | ||
With triethylamine In dichloromethane at 0 - 20℃; for 10h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: nitric acid, acetic anhydride 2: KOH / ethanol; H2O | ||
Multi-step reaction with 2 steps 1: nitric acid 2: aqueous hydrochloric acid | ||
Multi-step reaction with 2 steps 1: nitric acid 2: ethanolic sulfuric acid |
Multi-step reaction with 2 steps 1: nitric acid / 0.25 h / 0 °C / Inert atmosphere 2: hydrogenchloride / ethanol; water / 1 h / Reflux; Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 5 steps 1: nitric acid, acetic anhydride 2: KOH / ethanol; H2O 3: 98 percent / trifluoroacetic anhydride / 0.42 h 4: 1.) K2CO3 / 1.) dimethoxyethane; 2.) r.t., overnight 5: hydrogen / 10percent palladium on charcoal / ethanol / 1 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 6 steps 1: nitric acid, acetic anhydride 2: KOH / ethanol; H2O 3: 98 percent / trifluoroacetic anhydride / 0.42 h 4: 1.) K2CO3 / 1.) dimethoxyethane; 2.) r.t., overnight 5: hydrogen / 10percent palladium on charcoal / ethanol / 1 h 6: 51 percent / ethanol; HCl / 0.33 h / Heating |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 7 steps 1: nitric acid, acetic anhydride 2: KOH / ethanol; H2O 3: 98 percent / trifluoroacetic anhydride / 0.42 h 4: 1.) K2CO3 / 1.) dimethoxyethane; 2.) r.t., overnight 5: hydrogen / 10percent palladium on charcoal / ethanol / 1 h 6: 51 percent / ethanol; HCl / 0.33 h / Heating 7: 67 percent / Br2 / acetic acid / 1.) 90 deg C, 80 min; 2.) r.t., overnight |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 5 steps 1: nitric acid, acetic anhydride 2: KOH / ethanol; H2O 3: 85 percent / trifluoroacetic anhydride / 0.42 h 4: 92 percent / KOH / acetone / 0.5 h / Heating 5: hydrogen / 10percent palladium on charcoal / ethanol / 2 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 6 steps 1: nitric acid, acetic anhydride 2: KOH / ethanol; H2O 3: 85 percent / trifluoroacetic anhydride / 0.42 h 4: 92 percent / KOH / acetone / 0.5 h / Heating 5: hydrogen / 10percent palladium on charcoal / ethanol / 2 h 6: 498 mg / ethanol; HCl / 1.) 50-60 deg C, 70 min; 2.) reflux, 15 min |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 7 steps 1: nitric acid, acetic anhydride 2: KOH / ethanol; H2O 3: 85 percent / trifluoroacetic anhydride / 0.42 h 4: 92 percent / KOH / acetone / 0.5 h / Heating 5: hydrogen / 10percent palladium on charcoal / ethanol / 2 h 6: 498 mg / ethanol; HCl / 1.) 50-60 deg C, 70 min; 2.) reflux, 15 min 7: 100 mg / bromine / acetic acid / 0.75 h / 90 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: sulfuric acid; nitric acid 2: aqueous hydrochloric acid |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
55% | With nitric acid; acetic acid at 0℃; for 1h; | |
55% | With nitric acid In acetic acid at 0℃; for 2.5h; | 28.a a) 3'-acetylaminoacetophenone (10g, 56.4 mmol) was dissolved in 40mL glacial acetic acid was slowly added dropwise at 0 deg. C 10mL fuming nitric acid, over 30 minutes dropwise addition, reaction was stirred for 2 hours at 0 deg. C, warmed to room temperature, was added 200mL of water, was added 200mL ethyl acetate. The organic layer was washed with 100mL of saturated sodium bicarbonate solution, washed with 200mL water and 200mL saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate. The residue was purified by flash column chromatography on silica gel, using petroleum ether / ethyl acetate (V / V = 5: 1) to give compound B 6.9g, as a yellow solid in 55% yield. |
18% | With nitric acid In acetic anhydride at 0 - 5℃; for 0.166667h; Inert atmosphere; Green chemistry; | 2.1.1. Synthesis of N-(5-Acetyl-2-nitrophenyl)acetamide (11). To a cooled mixture (0-5°C) of fuming nitric acid (0.5 mL)and acetic anhydride (1 mL), the commercially available N-(3-acetylphenyl)acetamide 10 was added. 'e reaction wasstirred for 10 min, and then, ice was added to the mixture.'e obtained solution was neutralized with aqueous K2CO3and extracted with CHCl3. 'e organic phase was dried overNa2SO4 and concentrated under reduced pressure. 'e purecompound 11 was isolated by flash chromatography usingchloroform : diethyl ether (1 : 1) as eluent. Yellow crystals(18% yield); m.p. 121°C. 1H-NMR (CDCl3) δ: 10.21 (bs, 1H),9.28 (d, 1H, J 1.8 Hz), 8.20 (d, 1H, J 8.8 z), 7.65 (dd,J 1.9 Hz J 8.8 Hz), 2.60 (s, 3H), and 2.25 (s, 3H). MS (EI):m/z 222 [M]+ |
Multi-step reaction with 2 steps 1: nitric acid / Erwaermen des noch geringe Mengen 1-<6-Nitro-3-acetamino-phenyl>-aethanon-(1) enthaltenden Reaktionsprodukts mit aethanol. Schwefelsaeure | ||
With nitric acid; acetic anhydride at 0 - 20℃; for 0.25h; | 7 Compound 7; Fuming white nitric acid (3.6 g) was added drop wise to acetic anliydride (12 ml) at 0 0C and stirred for 15 minutes. The N-(3-acetyl-phenyl)-acetamide (2 g; 11.3 mmol) was then added portionwise and the reaction mixture allowed to Avarm to room temperature. After stirring at room temperature for 15 minutes, the reaction mixture was poured onto ice (200 ml). Dichloromethane (200 ml) was added and the organic layer was separated, dried (magnesium sulphate), filtered and evaporated to give the crude residue. This was purified by column chromatography to give N-(5-acetyl-2- nitro-phenyl)-acetamide (515 mg), which was directly hydrolysed by heating in 6M hydrochloric acid (15 ml) at 80 °C for 2 hours. The cooled reaction mixture was basified using saturated sodium bicarbonate solution and then extracted into ethyl acetate (6 x 30 ml). The organic layers were dried (magnesium sulphate), filtered and evaporated to give the crude residue. This was purified by column chromatography (50% ethyl acetate in heptane) to give 3-amino-4-nitroacetophenone (226 mg, 11%). | |
With nitric acid In acetic anhydride at 0 - 10℃; | 5mL of concentrated nitric acid (d=1.42g/mL) was carefully added dropwise with stirring over 10mL of cold acetic anhydride, avoiding temperature surpass 10°C. Once the temperature returned to 0°C, 3-N-acetylamino acetophenone (synthesized according to Section 4.2) was added dropwise keeping the temperature in a range of 5-10°C. After complete solubilization, the reaction was kept at the same temperature and then poured in a flask containing 60g of water/ice mixture. The formed precipitated was filtered out and washed with cold water. The product was purified through silica gel chromatography, using a mixture of 50% chloroform and 50% of ethyl ether (yield: 76%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
95% | With dimethylformamide dimethylacetal In toluene | 32.5 Step 5: Step 5: N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]phenyl]acetamide A mixture of 3-acetamidoacetophenone (3 kg; Lancaster), dimethylformamide dimethylacetal (7 L; Lancaster) and toluene (12 L; Mallinckrodt) is heated at reflux and methanol collected as it is formed. The mixture is heated overnight and a precipitate forms during this time. The reaction may be monitored by TLC analysis (EtOAc: starting material Rf= 0.46; product Rf= 0.10) to ensure it goes to completion. The reaction mixture is cooled and the solid is collected by filtration. The cake is washed with hexanes (4 L) then dried to give 3.77 kg (95% yield) of a light yellow powder. |
With <i>N</i>,<i>N</i>-dimethyl-formamide dimethyl acetal In toluene | 32.5 Step 5 Step 5 N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]phenyl]acetamide A mixture of 3-acetamidoacetophenone (3 kg; Lancaster), dimethylformamide dimethylacetal (7 L; Lancaster) and toluene (12 L; Mallinckrodt) is heated at reflux and methanol collected as it is formed. The mixture is heated overnight and a precipitate forms during this time. The reaction may be monitored by TLC analysis (EtOAc: starting material Rf=0.46; product Rf=0.10) to ensure it goes to completion. The reaction mixture is cooled and the solid is collected by filtration. The cake is washed with hexanes (4 L) then dried to give 3.77 kg (95% yield) of a light yellow powder. | |
With <i>N</i>,<i>N</i>-dimethyl-formamide dimethyl acetal | 8 N-(Cyclopropylmethyl)-N-[3-[3-(dimethylamino-1-oxo-2-propenyl]phenyl]acetamide EXAMPLE 8 N-(Cyclopropylmethyl)-N-[3-[3-(dimethylamino-1-oxo-2-propenyl]phenyl]acetamide A 10.4 g portion of N-(3-acetylphenyl)acetamide was reacted with 25 ml of dimethylformamide dimethylacetal for 8 hours under argon giving N-[3-[3-(dimethylamino)-1-oxo-2-propenyl]phenyl]acetamide. |
With <i>N</i>,<i>N</i>-dimethyl-formamide dimethyl acetal | 168 N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]phenyl]acetamide EXAMPLE 168 N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]phenyl]acetamide A 30.0 g portion of 3-acetamidoacetophenone was heated with 50 ml of dimethylformamide dimethylacetal on a steam bath under inert atmosphere for 8 hours. After cooling, the precipitated material was collected by filtration to yield the desired material as orange crystals (37.20 g, mp 184°-185° C.). | |
With <i>N</i>,<i>N</i>-dimethyl-formamide dimethyl acetal In toluene | 32.5 Step 5: Step 5: N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]phenyl]acetamide A mixture of 3-acetamidoacetophenone (3 kg; Lancaster), dimethylformamide dimethylacetal (7 L; Lancaster) and toluene (12 L; Mallinckrodt) is heated at reflux and methanol collected as it is formed. The mixture is heated overnight and a precipitate forms during this time. The reaction may be monitored by TLC analysis (EtOAc: starting material Rf = 0.46; product Rf = 0.10) to ensure it goes to completion. The reaction mixture is cooled and the solid is collected by filtration. The cake is washed with hexanes (4 L) then dried to give 3.77 kg (95% yield) of a light yellow powder. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
98.7% | With sodium hydroxide In DMF (N,N-dimethyl-formamide); toluene at 10 - 20℃; for 3h; | 5 Example 5; Preparation of N- (3 - Acetylphenyl) -N- methylacetamide Pearl-like sodium hydroxide (18.1 g) and N- (3- acetylphenyl) acetamide (50.1 g) were added to toluene (180 ml) while stirring at room temperature, and N, N- dimethylformamide (DMF) (20 ml) was added thereto at 17°C in a water bath. To the solution was added dropwise dimethyl sulfate (42.7 g) at 10°C, and the mixture was allowed to react at the same temperature for 3 hours, poured into water (100 ml) and concentrated to give the objective compound (53.2 g ; 98. 7% yield). |
71.6% | With sodium hydroxide In tetrahydrofuran at 0 - 20℃; for 5h; | 3 Example 3; Preparation of N- (3-Acetylphenyl)-N-methyacetamide To a solution of N- (3-acetylphenyl) acetamide (10.0 g, 56. 4 mmol) and sodium hydroxide (3.38 g, 84. 6 mmol) in tetrahydrofuran (40 ml) was added dropwise a solution of dimethyl sulfate (10.67 G, 84.6 mmol) in tetrahydrofuran (10 ml) under cooling with ice, and the resultant solution was stirred at room temperature for 5 hours. To the reaction mixture were added toluene (50 ml) and 1N hydrochloric acid (50 ml), and the organic layer was isolated and washed with saturated aqueous sodium bicarbonate (50 ml) and then concentrated. The residue was recrystallized from ethyl acetate-heptane to give the objective compound (7.66 g ; 71. 6% yield) as a white powder. |
With sodium hydride In tetrahydrofuran at 0 - 10℃; for 1h; | 1; 2 Comparison Example 1; Preparation of N- (3-Acetylphenyl)-N-methyacetamide In a stream of nitrogen, 60% sodium hydride (4. 51 g, 112. 9 mmol) was suspend in tetrahydrofuran (40 ml) and the suspension was cooled to 0°C. To the suspension was added dropwise a solution of 3'-aminoacetophenone (20.0 g, 112.9 mmol) and dimethyl sulfate (14.2 g, 112.9 mmol) in tetrahydrofuran (160 ml) at the temperature not higher than 10°C. The resultant mixture was allowed to react at 5°C for further 1 hour. A high performance liquid chromatography (HPLC) analysis of the reaction mixture revealed that 9.2% of the starting material, 3'-aminoacetophenone, still remained.Comparison Example 2; Preparation of N- (3-acetylphenyl)-N-methyacetamide.In a stream of nitrogen, 60% sodium hydride (5.42 g, 135.4 mmol) was suspended in tetrahydrofuran (40 ml) and the suspension was cooled to 0°C. To this suspension was added dropwise a solution of 3'-aminoacetophenone (20.0 g, 112.9 mmol) and dimethyl sulfate (17.08 g, 135.4 mmol) in tetrahydrofuran (160 ml) at the temperature not higher than 10°C, and the resultant mixture was allowed to react at 5°C for further 1 hour. A high performance liquid chromatography (HPLC) analysis of the reaction mixture revealed that, although no starting material, i. e. 3'- aminoacetophenone, was detected, N-(3-propionylphenyl)-N-methylacetamide formed by methylation of the acetyl group was by-produced to the extent of 4. 2%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | N-(3-Acetylphenyl)acetamide (100 g, 0.564 moles), powdered sodium hydroxide (33.86 g, 0.8465 moles) and toluene (750 ml) were combined and stirred at room temperature for thirty minutes. The reaction mixture was cooled to 0-5 C. and methyl p-toluenesulfonate (115.6 g, 0.6208 moles) was added over one hour. The mixture was heated to 50 C. for twelve hours. The TLC (7:3; ethyl acetate:heptane) showed the reaction was complete. Water (500 ml) was added and the layers separated. The organic layer was washed with saturated aqueous sodium sulfate (500 ml). The organic portion was dried over magnesium sulfate, filtered and concentrated under reduced pressure to a yellow solid (52.6 g). The aqueous portion was reextracted with dichloromethane (3×), dried over magnesium sulfate, filtered and concentrated under reduced pressure to a yellow solid (56.6 g). The two portions found to be the N-(3-acetylphenyl)-N-methylacetamide (100% yield) were combined. LC/MS (M+H) 192. 1H NMR (400 MHz, CDCl3) delta ppm 7.90 (1H, d), 7.78 (1H, s), 7.52, (1H, t), 7.40 (1H, d), 3.27 (3H, s), 2.61 (3H, s), 1.86 (3H, s). | |
59.9% | With sodium hydroxide; In toluene; at 12 - 50℃; for 5h; | To a solution of N- (3-acetylphenyl) acetamide (10.0 g, 56.4 mmol) and sodium hydroxide (3.38 g, 84.6 mmol) in toluene (50 ml) was added dropwise methyl p- toluenesulfonate (11.56 g, 62.1 mmol) at 12C, and the resultant mixture was stirred at 50C for 5 hours. The reaction mixture was then washed with water (50 ml), and the organic layer was washed with saturated aqueous sodium chloride (50 ml), and concentrated. The residue was recrystallized from toluene-heptane to give the objective compound (6.46 g; 59. 9% yield) as a white powder. |
With sodium hydroxide; In toluene; at 60℃; for 8h;Inert atmosphere; | Reference Production Example 88 Under nitrogen atmosphere, a mixture of 30 mL of toluene, 3.54 g of C87A, and 1.20 g of sodium hydroxide was stirred at room temperature. Here, methyl p-toluenesulfonate was added dropwise and the reaction was performed at 60C for 8 hours. After cooling to room temperature, water and an aqueous sodium sulfate solution were added, and the reaction solution was extracted three times with ethyl acetate, dried over anhydrous magnesium sulfate, and then concentrated to obtain a crude product of N-(3-acetylphenyl)-N-methylacetamide (C88A). 1H-NMR (CDCl3) delta (ppm): 7.92 (1H, s, J = 7.9 Hz), 7.79 (1H, s), 7.54 (1H, t, J= 7.9 Hz), 7.61 (1H, m), 3.29 (3H, s), 2.63 (3H, s), 1.88 (3H, s). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
96% | for 2h; Heating / reflux; | 1 A solution of 3'-acetomidoacetophenone (G; 10Og, 564.3 mmol) in iV.iV-dimethylfoϖnamide dimethyl acetal (166 mL, 1.25 mol) was refluxed in a 1-L round bottom flask equipped with a Dean-Stark apparatus for 2 hours. The volatiles were removed under reduced pressure and the solid were triturated with MTBE (500 mL) to give H (126 g, 96%) as an orange solid. |
95% | for 14h; Heating; | |
90% | for 1h; Heating / reflux; | 1 N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]-phenyl]-acetamide (8). A mixture of 3-acetamidoacetophenone 7 (20 g, 112.9 mmol), dimethylformamide dimethyl acetal (40.3 g, 338.6 mmol) was refluxed under nitrogen for 1 hour.. The reaction mixture was cooled, diluted with ethyl acetate (150 ML) and ether (150 ML).. The solid was collected by filtration, triturated with a solution of ethyl acetate and hexane (1:1, 200 ML).. Compound 8 was obtained as a red-orange solid (23.6 g, 101.6 mmol, 90%). GC/MS, m/z = 232 at TR=15.11 min (100%). LC/MS, [M+H]' = 233. |
90% | at 100℃; for 2h; Molecular sieve; Inert atmosphere; | 1.4 [0176] Step 4: (E)-N-(3-(3-(dimethylamino )acryloyl)phenyl)acetamide [0177] A solution of N-(3-acetylphenyl)acetamide (1.77 g, 10.0 mmol) in DMF-DMA (6 mL)with molecular sieve (10 portions) was stirred at 100 °C under N2 for 2 hr. the mixture wasconcentrated and washed with MTBE (30 mL) to afford 2.I g (90%) of (E)-N-(3-(3-(dimethylamino)acryloyl)phenyl)acetamide as a yellow solid. |
90% | at 100℃; for 2h; Molecular sieve; Inert atmosphere; | 1.4 Step 4: N-{3-[(2E)-3-(dimethylamino)prop-2-enoyl]phenyl}acetamide Under nitrogen,Dissolve N-(3-acetylphenyl)acetamide (1.77 g, 10.0 mmol) in DMF-DMA (6 mL).Molecular sieves (10 particles) were added and stirred at 100°C for 2 hours.The mixture was concentrated and washed with methyl tert-butyl ether (30 mL).Obtained yellow solid N-{3-[(2E)-3-(dimethylamino)prop-2--Enoyl]phenyl}acetamide (2.1 g, 90%). |
In hexane; ethyl acetate | 1 N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]-phenyl]-acetamide (8). N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]-phenyl]-acetamide (8). A mixture of 3-acetamidoacetophenone 7 (20 g, 112.9 mmol), dimethylformamide dimethyl acetal (40.3 g, 338.6 mmol) was refluxed under nitrogen for 1 hour. The reaction mixture was cooled, diluted with ethyl acetate (150 mL) and ether (150 mL). The solid was collected by filtration, triturated with a solution of ethyl acetate and hexane (1:1, 200 mL). Compound 8 was obtained as a red-orange solid (23.6 g, 101.6 mmol, 90%). GC/MS, m/z=232 at tR=15.11 min (100%). LC/MS, [M+H]'=233. | |
N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]-phenyl]-acetamide (5) N-[3-[3-(Dimethylamino)-1-oxo-2-propenyl]-phenyl]-acetamide (5) A mixture of 3-acetamidoacetophenone (30 g, 169 mmol) and dimethylformamide dimethyl acetal (50 mL, 376 mmol) is refluxed under nitrogen for 8 hours. The reaction mixture is cooled and the solid collected by filtration to yield product (5) as an orange solid (37.2 g, 160 mmol, 95%). | ||
In acetonitrile at 82℃; for 1h; Microwave irradiation; Sealed tube; | Synthesis of compounds 7a-m General procedure: A vial containing a mixture of aromatic ketone 13a-m (1 mmol) and N,N-dimethylformamide dimethyl acetal (12) (1 mmol) in CH3CN (3 mL) was sealed and placed in a Anton Paar Microwave Synthetic Reactor. The vial was subjected to microwave irradiation, programmed at 82 oC and 150W. After a period of 30 second, the temperature reached a plauteau, 82 oC, and remained constant. After stirring reaction for 60 min, 2-hydroxy-1,4-naphthoquinone (15) (1 mmol) and glacial AcOH (0.2 mmol) were added into the vial. The reaction was stirred for a further 30 min. The vial was then cooled to room temperature. Evaporation of the solvent gave crude products 7a-m, which was purified by column chromatography using a MeOH-EtOAc-DCM eluent (1:4:5) |
Yield | Reaction Conditions | Operation in experiment |
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93% | 4 This compound was obtained by treatment of N [3- (3-dimethylamino-acryloyl)-phenyl]- acetamide and 4-hydroxy-phenyl guanidine nitrate in MECN : 98 mg yellow solid (30 %). 'H-NMR (CD30D) : 5 3. 32 (s, 3H, CH3), 6. 79 (d, 2H, J= 9. 0 Hz, Ph-H), 7. 18 (d, 1H, J= 5. 0 Hz, pyrimidine-H), 7. 44 (t, 1H, J= 8. 0 Hz, Ph-H), 7. 50 (d, 2H, J= 9. 0 Hz, Ph-H), 7. 65 (d, 1H, J= 9. 0 Hz, Ph-H), 7. 84 (d, 1H, J= 8. 0 Hz, Ph-H), 8. 35 (s, 1H, Ph-H), 8. 37 (d, 1H, J= 5. 0 Hz, pyrimidine-H). N [3- (3-Dimethylamino-acryloyl)-phenyl]-acetamide was prepared by treatment of N- (3- acetyl-phenyl)-acetamide with N, N-DIMETHYLFORMAMIDE dimethylacetal (93 %) : H-NMR (CD30D) : 5 2. 14 (s, 6H, CH3), 2. 58 (s, 3H, CH3), 5. 79 (d, 1H, J= 12. 0 Hz, CH), 7. 37 (t, 1H, J= 8. 0 Hz, Ph-H), 7. 58 (d, 1H, J= 8. 0 Hz, Ph-H), 7. 7 (d, J= 8. 0 Hz, 1H, Ph-H), 7. 83 (d, J= 12. 0 Hz, 1H, CH), 8. 02 (s, 1H, 2-H) ; MS (ESI+) m/z 233. 20 [M+H] +, C13HL6N202 requires 232. 28. | |
at 80℃; | 1 Example l:Synthesis of N-{3-[3-(DimethylaminoM-oxo-2-propenyl1phenyUacetamide 2; To a solution of dimethylformamide dimethylacetal (50ml) was added N-(3- acethylphenyl)acetamide 1 (15g, 0.085mol) and the mixture was heated at reflux overnight.The solution was evaporated to dryness and the residue obtained was taken up indichloromethane (200ml), dried over sodium sulfate, filtered and concentrated to dryness to give the title compound 2 (15.8g) as a yellow oil. | |
Reflux; | Typical procedure for the synthesis of 3a-3g General procedure: Aromatic ketones 2a-2g (20mmol) and N, N-dimethylformamide dimethyl acetal (DMF-DMA) (40mmol) was reflux until the starting materials was consumed determined by TLC, then cooled to room temperature. The solid product formed was filtered off and washed with cold petrolem followed by cold ethanol, the product was pure enough for the next step. |
In N,N-dimethyl-formamide at 190℃; for 0.5h; Microwave irradiation; | 1.1 N-(3-(5-hydroxy-6-methoxybenzofuran-3-carbonyl)phenyl)acetamide (compound 1) General procedure: We consulted the synthetic method reported by our laboratory shortly before. A mixture of N-(3-acetylphenyl)acetamide (1.0 mmol), dimethylformamide dimethyl acetal (1.0 mmol) and DMF (4 mL) was added to a 25mL-two-neck round-bottomed flask. Then the system was refluxed and heated at 190 °C for 30 min under microwave irradiation of 300 W. Once cooled, the reaction mixture was analyzed by TLC (acetone/ petroleum ether = 1/3, Rf = 0.27) and passed to the next step without purification. In the above reaction mixture, we added 2-Methoxycyclohexa-2,5-diene-1,4-dione (3.0 mmol) and acetic acid (0.5 mL). Then the reaction flask was exposure to microwave irradiation of 200 W at 60 °C for 30 min. when it cooled, we used the mixed solvent of ethyl acetate and water to partition. The aqueous layer was extracted with ethyl acetate (3×10 mL). The organic layers were combined, dried over with anhydrous Na2SO4, filtered and concentrated in vacuo to leave a yellow residue. Finally, we purified this material by column chromatography (acetone/ petroleum ether=1/8) and got the desired compound 1. |
Yield | Reaction Conditions | Operation in experiment |
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100% | With potassium hydroxide In acetone at 20℃; | 3 Acetamidoacetophenone (0. 2 g, 1. 13 mmol) in ME2CO (2 mL) was treated with KOH (63 mg, 1. 13 mmol) and then iodoethane (0. 45 mL, 5. 64 mmol). After stirring at room temperature overnight the reaction mixture was concentrated to dryness. The residue was redissolved in EtOAc and was washed with H20 and brine, and was dried on MGS04. The solvent was evaporated to yield N-(3-acetyl-phenyl)-N-ethyl-acetamide as an orange powder (0. 23 g, 100 %) : mp 203-204 °C ; 1H-NMR (CD30D) : No. 1. 11 (t, 3H, J= 7. 0 Hz, CH3), 1. 82 (s, 3H, CH3), 3. 31 (s, 3H, CH3), 3. 77 (q, 2H, J = 7. 0, 14. 0 Hz, CH2) 7. 56 (d, 1H, J=8. 0 Hz, Ph-H), 7. 65 (t, 1H, J= 8 Hz, Ph-H), 7. 88 (s, 1H, Ph-H) and 8. 06 (d, 1H, J = 8 Hz, Ph-H) ; MS (ESF) m/z 205. 91 [M], C12H15NO2 requires 205. 25. This material (0. 23G, 1. 13 mmol), redissolved in MECN (2 mL), was treated with N,N- dimethylformamide dimethylacetal (150 UL, 1. 12 mmol) at 180 °C FOR 10 min in a microwave reactor (SmithCreator, Personal Chemistry Ltd.). The solvent was evaporated and the residue was filtered and washed with EtOAc/PE (1 : 3) to afford N [3- (3- DIMETHYLAMINO-ACRYLOYL)-PHENYL]-N-ETHYL-ACETAMIDE as an orange solid (0. 30 g, 100 %). 1H-NMR (CD30D) : 61. 11 (t, 3H, J= 7. 0 Hz, CH3), 1. 82 (s, 3H, CH3), 2. 04 (s, 6H, CH3), 3. 76 (q, 2H, J= 7. 0, 14. 0 Hz, CH2), 5. 87 (d, 1H, J= 12. 0 Hz, CH), 7. 39 (d, 1H, J= 8. 0 Hz, Ph-H), 7. 55 (t, 1H, J= 8. 0 Hz, 5-H), 7. 76 (s, 1H, Ph-H), 7. 89 (d, 1H, J= 12. 0 Hz, CH), 7. 93 (d, 1H, J = 8. 0 Hz, Ph-H) ; MS (ESI+) m/z 261. 32 [M+H]+, C15H20N2O2 requires 260. 33. A solution of this material (0. 228 g, 0. 88 mmol), 4-hydroxy-phenyl guanidine nitrate (0. 188 g, 0. 88 mmol) and NAOH (35 mg, 0. 88 mmol) in MeCN (2 mL) was heated at 190 °C for 15 min in the microwave reactor. The solvent was evaporated and the residue was purified by Si02 gel chromatography (EtOAc/PE, 1 : 1) to afford the title compound as a yellow solid (117 mg, 38 %). IH-NMR (CD30D) : No.1. 16 (t, 3H, J= 7 Hz, CH3), 3. 35 (s, 3H, CH3), 3. 38 (q, 2H, J= 7. 0, 14. 0 Hz, CH2), 6. 77 (d, 2H, J= 9. 0 Hz, Ph-H), 7. 27 (d, 1H, J= 5. 0 Hz, pyrimidine-H), 7. 42 (d, 1H, J= 8. 0 Hz, Ph-H), 7. 48 (d, 2H, J= 9. 0 Hz, Ph-H), 7. 62 (t, 1H, J= 8. 0 Hz, Ph-H), 8. 6 (s, 1H, Ph-H), 8. 14 (d, 1H, J=8. 0 Hz, Ph-H), 8. 41 (d, 1H, J= 5. 0 Hz, pyrimidine-H). |
Yield | Reaction Conditions | Operation in experiment |
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With acetic anhydride In toluene | 10.a 1-(3-Acetylaminophenyl)ethanone (a) 1-(3-Acetylaminophenyl)ethanone 50 ml of acetic anhydride are added in the cold to a suspension of 30 g (0.22 mole) of 1-(3-aminophenyl)ethanone in 200 ml of toluene, and the mixture is stirred for 1 h at room temperature, then heated for 1 h to 60° C. and left to stand overnight. The precipitate obtained is drained, ground in ether and dried. |
Yield | Reaction Conditions | Operation in experiment |
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With sodium methylate In tetrahydrofuran; water; acetonitrile | 24 N-[6-[3-(N-Acetyl-L-alanylamino)phenyl]-1,2-dihydro-2-oxonicotinyl]amoxicillin. EXAMPLE 24 N-[6-[3-(N-Acetyl-L-alanylamino)phenyl]-1,2-dihydro-2-oxonicotinyl]amoxicillin. A stirred suspension of 71.3 g (1.32 mol) of sodium methoxide, 500 ml of tetrahydrofuran, and 300 ml of ether was cooled to 0°-5° under nitrogen and a solution of 106.3 g (0.6 mol) of 3-(acetylamino)acetophenone, 96.94 (1.2 mol) of ethyl formate, 700 ml of dry acetonitrile, and 350 L ml of tetrahydrofuran was added during 30 min. The reaction was allowed to warm to room temperature with stirring overnight. The organic solvents were decanted from the solids and the solids dissolved in 2.25 l of water. The pH was adjusted to 9.0 with glacial acetic acid and 84.1 g (1.0 mol) of 2-cyanoacetamide was added. The solution was heated at reflux for 3.5 hrs, cooled, and filtered. The solids were washed with water, acetonitrile, and ether and dried to give 93.1 g of 6-(3-acetylaminophenyl)-1,2-dihydro-2-oxonicotinonitrile; mp 326°-328°. EQU20 | |
With sodium methylate In tetrahydrofuran; water; acetonitrile | J Alternative method for the preparation of 6-[4-(N-acetyl-L-glutaminylamino)phenyl]-1,2-dihydro-2-oxonicotinic acid. J. A stirred suspension of 71.3 g (1.32 mol) of sodium methoxide, 500 ml of tetrahydrofuran, and 300 ml of ether is cooled to 0°-5° under nitrogen and a solution of 106.3 g (0.6 mol) of 3-(acetylamino)acetophenone, 96.94 (1.2 mol) of ethyl formate, 700 ml of dry acetonitrile, and 350 ml of tetrahydrofuran is added during 30 min. The reaction is allowed to warm to room temperature with stirring overnight. The organic solvents are decanted from the solids and the solids dissolved in 2.25 L of water. The pH is adjusted to 9.0 with glacial acetic acid and 84.1 g (1.0 mol) of 2-cyanoacetamide is added. The solution is heated at reflux for 3.5 hrs, cooled, and filtered. The solids are washed with water, acetonitrile, and ether and dried to give 93.1 g of 6-(3-acetylaminophenyl)-1,2-dihydro-2-oxonicotinonitrile; m.p. 326°-328°. EQU48 |
Yield | Reaction Conditions | Operation in experiment |
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62.9% | With copper(I) bromide In ethyl acetate at 80℃; | 33.b B) 3-Acetylaminoacetophenone (25 g, 141 mmol)And copper bromide (38 g, 169 mmol)Were successively dissolved in ethyl acetate (300 mL)The mixture was stirred overnight at 80 ° C,The reaction solution was cooled to room temperature,Followed by 500 mL of water,500 mL of saturated sodium chloride solution,The ethyl acetate layer was separated,Dried over anhydrous sodium sulfate,The organic solvent was distilled off under reduced pressure,The residue was purified by flash silica gel column chromatography,Eluting with petroleum ether / ethyl acetate (V / V = 10: 1)To give the title compound 22g,As a white solid,Yield 62.9%. |
60.9% | With copper(ll) bromide In ethyl acetate Reflux; Inert atmosphere; | |
With pyridinium hydrobromide perbromide In acetic acid at 20℃; for 3h; |
With tetra-N-butylammonium tribromide In acetonitrile at 20℃; for 12h; | Step (i) General procedure: (i) The commercial available 8a-8l (4 mmol, 1.0 equiv.)was respectively dissolved in acetonitrile (50 mL), adding tetrabutylammoniumtribromide(4 mmol, 1.0 equiv.) later. The mixture was stirred overnight under roomtemperature until the solution turned light yellow or colorless. The solventwas removed in vacuo, the residue wasextracted with dichloromethane and washed with water. The organic layers werecombined and concentrated under vacuum to provide the crude products 9a-9l, which using for next step withoutany purification. | |
With bromine In chloroform; water | 1 Preparation of 3'-Bromacetylacetanilide (IA) EXAMPLE 1 Preparation of 3'-Bromacetylacetanilide (IA) To a stirred solution of 110.0 g. (0.62 mole) of 3'-acetylacetanilide in 2400 ml. of chloroform is added dropwise a solution of 33.0 ml. (102.9 g; 0.644 mole) of bromine in 240 ml. of chloroform. The solution is stirred one hour and the resultant precipitate is then filtered, washed with ether and dried. The solid is stirred in a large volume of water to give an oily precipitate which crystallizes on further stirring. The solid is filtered, washed with water and then 2-propanol. The dried product weighs 148.34 g., and is recrystallized from 2-propanol to give the product, melting point 108.5°-110°C. Analysis: Calcd. for C10 H10 BrNO2: Calcd: C, 46.90; H, 3.94; Br, 31.20; N, 5.47. Found: C, 47.12; H, 3.94; Br, 31.21; N, 5.47. | |
With bromine In chloroform; water | 1 Preparation of 3'-Bromacetylacetanilide (IA) Example 1 Preparation of 3'-Bromacetylacetanilide (IA) To a stirred solution of 110.0 g. (0.62 mole) of 3'-acetylacetanilide in 2400 ml. of chloroform is added dropwise a solution of 33.0 ml. (102.9 g; 0.644 mole) of bromine in 240 ml. of chloroform. The solution is stirred one hour and the resultant precipitate is then filtered, washed with ether and dried. The solid is stirred in a large volume of water to give an oily precipitate which crystallizes on further stirring. The solid is filtered, washed with water and then 2-propanol. The dried product weighs 148.34 g., and is recrystallized from 2-propanol to give the product, melting point 108.5°-110° C. Analysis: Calcd, for C10 H10 BrNO2: Calcd: C, 46.90; H, 3.94; Br, 31.20; N, 5.47. Found: C, 47.12; H, 3.94; Br, 31.21; N, 5.47. |
Yield | Reaction Conditions | Operation in experiment |
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With hydrogenchloride; triphenylphosphine; diethylazodicarboxylate; paraformaldehyde In 4-hydroxybenzotrifluoride | 6 1-(3-(3-Acetamidophenyl)-3-(4-trifluoromethylphenoxy)propyl)piperidine, oxalate (24) 1-(3-(3-Acetamidophenyl)-3-(4-trifluoromethylphenoxy)propyl)piperidine, oxalate (24) 3-Acetamidoacetophenone (10 g), paraformaldehyde (2.8 g), piperidine (9.3 ml) and conc. HCl (7.8 ml) were reacted as described for (23), resulting in 4.1 g of the Mannich product which on reduction with NaBH4 (1 g) gave 2.1 g alcohol which in turn was reacted with 4-trifluoromethylphenol (1.2 g), triphenylphosphine (1.95 g) and DEAD (1.25 g) giving 1 g of (24) after purification on silica gel as described for (23). M.p. 159-161oC. |
Yield | Reaction Conditions | Operation in experiment |
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Stage #1: 3-Acetamidoacetophenone With ammonium acetate; sodium cyanoborohydride In methanol at 20℃; for 48h; Stage #2: With hydrogenchloride In methanol; water Stage #3: With sodium hydroxide In water | 47.47A To a solution of N-(3-acetylphenyl)acetamide (1.0 g, 5.6 mmol) in methanol (10 mL), a solution of ammonium acetate (4.34 g, 56.4 mmol) and NaCNBH3 (1.05 g, 16.8 mmol) in methanol (15 mL) was added. The resulting reaction mixture was stirred at rt for 48 h. The reaction was acidified to pH 2 using 1 N HCl and then the solvent was evaporated. The residue was redissolved in water and then extracted with ether. The aqueous layer was basified to pH 10 using solid NaOH and then extracted with ethyl acetate. The organic extract was washed with brine and dried over sodium sulfate and concentrated to give 47A. 1H NMR (400 MHz, Methanol-d4) (ppm 1.40 (d, J=6.85 Hz, 3 H) 2.04 (s, 3 H) 4.24 (q, J=6.85 Hz, 1 H) 6.85 (s, 2 H) 7.11 (d, J=7.83 Hz, 1 H) 7.31 (t, J=7.83 Hz, 1 H) 7.45 (d, J=8.07 Hz, 1 H) 7.70 (s, 1 H) 9.98 (s, 1 H). |
Yield | Reaction Conditions | Operation in experiment |
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70% | Stage #1: 3-Acetamidoacetophenone With N,N,N-trimethylanilinium bromide In tetrahydrofuran at 20℃; Stage #2: sodium ethyltrithiocarbonate In tetrahydrofuran |
Yield | Reaction Conditions | Operation in experiment |
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40% | <strong>[2770-11-8]2-(4-Chlorophenoxy)aniline</strong> (100 mg, 0.4552 mmol, 1.1 eq) and N-Q- acetylphenyl)acetamide (73 mg, 0.4120 mmol, 1 eq) were stirred in dry dichloromethane <n="110"/>(DCM) at room temperature for 10 min. Tri-isopropoxytitanium chloride (215 muL, 0.9002 mmol, 2.2 eq) was added to the reaction mixture which was stirred at room temperature for an additional 10 min. Sodium triacetoxyborohydride (438 mg, 2.0667 mmol, 5 eq) and acetic acid (3 drops) were added to the reaction mixture which was stirred at room temperature for 16 h. The reaction mixture was then poured onto a solution of saturated aqueous sodium bicarbonate (100 mL) and extracted with DCM (120 mL). The organic layer was washed with brine (120 mL), dried over MgSO4, filtered and concentrated to give the crude as a yellow foam. Purification of the crude by flash chromatography (ISCO) eluting with a gradient [from 100% petroleum ether (PE) to 100% EtOAc] gave the title compound (62 mg, 40%) as a white solid.1H NMR (270 MHz, CDCl3) delta 1.45 (3H, d, J = 7.0 Hz, CH3), 2.09 (3H, s, CH3), 4.39-4.52 (2H, m, CH + NH), 6.41-6.46 (IH, m, ArH), 6.51-6.60 (IH, m, ArH), 6.75-6.95 (5H, m, ArH), 7.01-7.08 (IH, m, ArH), 7.18-7.29 (2H, m, ArH), 7.35-7.42 (2H, m, ArH), 7.70 (IH, br s, NH); 13C NMR (67.5 MHz, CDCl3) delta 24.7, 25.2, 53.2, 113.0, 117.0, 117.1,118.6, 118.8, 119.2, 121.7, 125.3, 129.4, 129.7, 138.4, 139.4, 142.6, 146.3, 156.4, 168.5 ;LCMS (90% MeOH and 10% H2O; Symmetry Ci8 reverse phase column) tr = 2.25 min;(ES"), m/z 381 (35ClM', 75%), 383 (37ClM", 25%); HRMS (ESI) calcd. for C22H22ClN2O2(M+H)+ 381.1364, found 381.1369. |
Yield | Reaction Conditions | Operation in experiment |
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In 1-methyl-pyrrolidin-2-one at 150℃; for 0.166667h; Microwave irradiation; | 122.1 A solution of the hydrazine (1 g, 5 mmol) and 3-acetylacetanilide (0.88 g, 5 mmol) in NMP (5 ml) was heated at 150°C under microwave for 10 minutes. The solution was poured into water and extracted with EtOAc three times. The organic layer was washed with water, dried over sodium sulfate and then concentrated in vacuo, The residue was purified by RPLC to give the desired compound. MS (m/z): 308 (M+H)+. | |
In 1-methyl-pyrrolidin-2-one at 150℃; for 0.166667h; Microwave irradiation; | 122.1 Step 1 A solution of the hydrazine (1 g, 5 mmol) and 3-acetylacetanilide (0.88 g, 5 mmol) in NMP (5 ml) was heated at 150° C. under microwave for 10 minutes. The solution was poured into water and extracted with EtOAc three times. The organic layer was washed with water, dried over sodium sulfate and then concentrated in vacuo. The residue was purified by RPLC to give the desired compound. MS (m/z): 308 (M+H)+. |
Yield | Reaction Conditions | Operation in experiment |
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92% | With zinc perchlorate; acetyl chloride at 20℃; Neat (no solvent); | 4.1. Typical experimental procedure for the synthesis of N-(3-oxo-1,3-diarylpropyl)acetamide and N-(3-oxo-1,3-diphenylpropyl)acetamide (3a) General procedure: To a magnetically stirred mixture of 2a (2.5 mmol, 1 equiv, 0.26 g), 1a (1 equiv, 0.3 g), acetyl chloride (1 equiv) and acetonitrile (1 equiv) was added Zn(ClO4)2·6H2OrefPreviewPlaceHolder31 (9.3 mg, 0.025 mmol, 1 mol %) at room temperature. The progress of the reaction was monitored by TLC (5 min). After the completion of reaction, the mixture was poured into 50 mL ice-water. The solid product was filtered, washed with ice-water, dried and purified via column chromatography (silica gel 60-120 No.) using EtOAc-hexane as eluent to afford pure white solid 3a (0.63 g, 95%). |
Yield | Reaction Conditions | Operation in experiment |
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93% | With zinc perchlorate; acetyl chloride at 20℃; Neat (no solvent); | 4.1. Typical experimental procedure for the synthesis of N-(3-oxo-1,3-diarylpropyl)acetamide and N-(3-oxo-1,3-diphenylpropyl)acetamide (3a) General procedure: To a magnetically stirred mixture of 2a (2.5 mmol, 1 equiv, 0.26 g), 1a (1 equiv, 0.3 g), acetyl chloride (1 equiv) and acetonitrile (1 equiv) was added Zn(ClO4)2·6H2OrefPreviewPlaceHolder31 (9.3 mg, 0.025 mmol, 1 mol %) at room temperature. The progress of the reaction was monitored by TLC (5 min). After the completion of reaction, the mixture was poured into 50 mL ice-water. The solid product was filtered, washed with ice-water, dried and purified via column chromatography (silica gel 60-120 No.) using EtOAc-hexane as eluent to afford pure white solid 3a (0.63 g, 95%). |
Yield | Reaction Conditions | Operation in experiment |
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77% | With zinc perchlorate; acetyl chloride at 20℃; Neat (no solvent); | 4.1. Typical experimental procedure for the synthesis of N-(3-oxo-1,3-diarylpropyl)acetamide and N-(3-oxo-1,3-diphenylpropyl)acetamide (3a) General procedure: To a magnetically stirred mixture of 2a (2.5 mmol, 1 equiv, 0.26 g), 1a (1 equiv, 0.3 g), acetyl chloride (1 equiv) and acetonitrile (1 equiv) was added Zn(ClO4)2·6H2OrefPreviewPlaceHolder31 (9.3 mg, 0.025 mmol, 1 mol %) at room temperature. The progress of the reaction was monitored by TLC (5 min). After the completion of reaction, the mixture was poured into 50 mL ice-water. The solid product was filtered, washed with ice-water, dried and purified via column chromatography (silica gel 60-120 No.) using EtOAc-hexane as eluent to afford pure white solid 3a (0.63 g, 95%). |
Yield | Reaction Conditions | Operation in experiment |
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86% | With zinc perchlorate; acetyl chloride at 20℃; Neat (no solvent); | 4.1. Typical experimental procedure for the synthesis of N-(3-oxo-1,3-diarylpropyl)acetamide and N-(3-oxo-1,3-diphenylpropyl)acetamide (3a) General procedure: To a magnetically stirred mixture of 2a (2.5 mmol, 1 equiv, 0.26 g), 1a (1 equiv, 0.3 g), acetyl chloride (1 equiv) and acetonitrile (1 equiv) was added Zn(ClO4)2·6H2OrefPreviewPlaceHolder31 (9.3 mg, 0.025 mmol, 1 mol %) at room temperature. The progress of the reaction was monitored by TLC (5 min). After the completion of reaction, the mixture was poured into 50 mL ice-water. The solid product was filtered, washed with ice-water, dried and purified via column chromatography (silica gel 60-120 No.) using EtOAc-hexane as eluent to afford pure white solid 3a (0.63 g, 95%). |
Yield | Reaction Conditions | Operation in experiment |
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75% | With selenium(IV) oxide; toluene-4-sulfonic acid In acetonitrile at 30 - 35℃; for 19h; regioselective reaction; | |
75% | Stage #1: naphthalene; 3-Acetamidoacetophenone With selenious acid In acetonitrile at 23℃; for 0.25h; Stage #2: With toluene-4-sulfonic acid In acetonitrile at 35℃; for 12h; regioselective reaction; | General experimental procedure: To a pre-stirred (stirred at 23 °C for 15 min) mixture of substituted acetophenones (1.0 mmol), arenes (1.0 mmol) and selenous acid (2 mmol) in acetonitrile (5 mL) was added p-toluene sulfonic acid monohydrate (p-TsOH·H2O) (30 mol %) at 23 °C. The reaction mixture was allowed to stir at 35 °C for 12-14 h. On completion, the reaction mixture was diluted with ethyl acetate and filtered through a Celite bed. The Celite bed was washed thoroughly with ethyl acetate (3 × 5 mL). The combined filtrate was washed with saturated aqueous sodium bicarbonate solution followed by water (10 mL) and brine (10 mL). The organic layer was separated, dried over anhydrous sodium sulphate (Na2SO4) and concentrated under reduced pressure. The crude mass was purified by column chromatography on silica gel (100-200 mesh) using ethyl acetate and hexane as eluent to give the benzyls in pure form. |
Yield | Reaction Conditions | Operation in experiment |
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73% | With selenium(IV) oxide; toluene-4-sulfonic acid In acetonitrile at 30 - 35℃; for 19h; regioselective reaction; |
Yield | Reaction Conditions | Operation in experiment |
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70% | With selenium(IV) oxide; toluene-4-sulfonic acid In acetonitrile at 30 - 35℃; for 18h; regioselective reaction; | |
70% | Stage #1: 3-Acetamidoacetophenone; methoxybenzene With selenious acid at 23℃; for 0.25h; Neat (no solvent); Stage #2: With toluene-4-sulfonic acid at 35℃; for 14h; Neat (no solvent); regioselective reaction; | General experimental procedure: To a pre-stirred (stirred at 23 °C for 15 min) mixture of substituted acetophenones (1.0 mmol), arenes (1.0 mmol) and selenous acid (2 mmol) in acetonitrile (5 mL) was added p-toluene sulfonic acid monohydrate (p-TsOH·H2O) (30 mol %) at 23 °C. The reaction mixture was allowed to stir at 35 °C for 12-14 h. On completion, the reaction mixture was diluted with ethyl acetate and filtered through a Celite bed. The Celite bed was washed thoroughly with ethyl acetate (3 × 5 mL). The combined filtrate was washed with saturated aqueous sodium bicarbonate solution followed by water (10 mL) and brine (10 mL). The organic layer was separated, dried over anhydrous sodium sulphate (Na2SO4) and concentrated under reduced pressure. The crude mass was purified by column chromatography on silica gel (100-200 mesh) using ethyl acetate and hexane as eluent to give the benzyls in pure form. In case of arene 2a (5 mL) the reaction was carried out at 80 °C and for the arene 2b-d (5 mL) at 35 °C without any solvent. |
Yield | Reaction Conditions | Operation in experiment |
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78% | With sodium hydroxide In methanol Inert atmosphere; Reflux; |
Yield | Reaction Conditions | Operation in experiment |
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88% | General procedure: Amides 6a-r (1 mmol) were dissolved in ethanol (15 ml), 1 ml 20% NaOH solution was added to it and stirred for 10 min at room temperature. Then, 3-formyl-9-methylcarbazole 3 (1 mmol) was added and stirring continued for 24 h at room temperature. After completion of reaction (TLC), reaction mixture was poured over crushed ice and stirred. The precipitate obtained was filtered and recrystallized by using methanol to obtain the target compounds (7a-r). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With bis-[(trifluoroacetoxy)iodo]benzene In 1,2-dichloro-ethane at 50℃; for 1h; Inert atmosphere; regioselective reaction; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
20% | Stage #1: 3-Acetamidoacetophenone; ethyl 2-cyanoacetate With ammonium acetate; acetic acid In toluene Dean-Stark; Reflux; Stage #2: With sulfur; diethylamine In ethanol at 50℃; for 3h; | Method A. Synthesis of alkyl 2-amino-4-arylthiophene-3-carboxylates General procedure: To a solution of arylacetophenone (30 mmol) in benzene or toluene (10 mL) was added ethylcyanoacetate or malononitrile (66 mmol), ammonium acetate (15 mmol) and acetic acid (60 mmol) and the reaction mixture was refluxed for 18 - 48h using a Dean Stark apparatus. After completion of reaction, the reaction mixture was cooled to room temperature, quenched with water (200 ml) and extracted with ethyl acetate (100ml x 2). The organic phase was dried over sodium sulphate, concentrated under reduced pressure and the residue was dissolved in ethanol (120 mL). Sulphur powder (40 mmol) and diethylamine (26 mmol) were added to the solution, which was heated at 50°C for 3h. The hot solution was then filtered to remove unreacted sulphur. The resulting filtrate was concentrated to give crude product, which was purified by flash chromatography to afford the corresponding alkyl 2-amino-4-arylthiophene-3-carboxylate or 3-cyano-2-amino-4-arylthiophene. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
21% | With sodium hydroxide In ethanol at 20℃; for 48h; | 4.1.4. General procedure for the synthesis of (10a-c) General procedure: A mixture of 8a-c (0.4 g, 1.1 mmol), 9 (0.6 g, 5.0 mmol) and NaOH (0.5 g, 12.5 mmol) in EtOH (12 ml) was stirred at room temperature for 48 h then neutralized with AcOH and evaporated in vacuo. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | In neat (no solvent) at 20℃; for 3h; Green chemistry; | PREPARATION OF THE ACETAMIDES General procedure: In a round-bottomed flask, a mixture of a suitable amine (1 eq.) and the appropriate enol ester (isopropenyl acetate or vinyl acetate) (3 eq.) was stirred at room temperature for the indicated time. The evolution of the reaction was monitored by TLC. After complete consumption of the amine, the crude reaction mixture was concentrated in vacuo and the amide was directly obtained pure. If it was not the case, a simple acidic work-up was required to purify the obtained acetamide. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydroxide In ethanol; water at 20℃; for 2h; | 4.2 Experimental procedure for the synthesis of substituted 2-(3-hydroxy-2-oxoindolin-3-yl)-1-arylethanone (1) General procedure: An aqueous solution of sodium hydroxide (5%, 10mL) was added slowly to the stirring solution of isatin (1mmol) and appropriate aryl acetophenone (1mmol) in ethanol (20mL) in 100mL conical flask. The stirring was continued for 2h and the completion of reaction was monitored by TLC. The reaction on completion was poured onto ice, solid obtained after filtration was crystallized from ethanol. The physical data for the characteristic compound is shown below: |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With acetic acid In ethanol at 50 - 80℃; for 3h; | 4.2.2 General procedure for the synthesis of 7a-n and 8a-i General procedure: (ii) To the solution of appropriate 5a-n and 6a-i (5.0 mmol) in anhydrous ethanol (20 mL), thiosemicarbazide (5.0 mmol) and acetic acid (0.5 mL) were added. The reaction mixture was stirred at 50-80 °C for 3 h and then cooled to room temperature. The precipitate solid was filtered, washed with ether, and purified by recrystallization from 95 % ethanol to afford desired compounds 7a-n and 8a-i. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
80% | With boron trifluoride diethyl etherate; selenious acid In neat (no solvent) at -5 - 20℃; for 10h; | General procedure: A mixture of aryl methyl ketones (1 equiv),triethylorthoformate (2 equiv), and selenous acid (0.7 equiv) was stirred in anice salt mixture (5 C) followed by the dropwise addition of BF3Et2O (49%,1.5 mL). The reaction was allowed to stand at room temperature for 8-14 h.The completion of the reaction was monitored by thin layer chromatography.The reaction mixture was diluted with ethyl acetate and filtered through acelite bed. The celite was washed with ethyl acetate. The combined filtrate waswashed with saturated aqueous sodium hydrogen carbonate solution, water(10 mL), and brine (10 mL). The organic layer was separated, dried withanhydrous Na2SO4, and concentrated. The compound was purified by columnchromatography on silica gel using ethyl acetate and hexane as eluent |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
26.8 g | Stage #1: 3-Acetamidoacetophenone With sodium hydride In N,N-dimethyl-formamide; mineral oil at 40℃; for 1h; Stage #2: ethyl bromide In N,N-dimethyl-formamide; mineral oil at 5 - 10℃; for 5h; | 1.3 (3)Synthesis of N- ethyl -N- [3- (3- acetylphenyl)] acetamide (V) The N- [3- (3- acetylphenyl)] acetamide (IV) (25g, 0.145mol) was dissolved in anhydrous DMF (150ml), the low temperature was added sodium hydride (60%, 6.32g, 0.158mol), stirred at 40 1h.After cooling to 5-10 dropwise bromoethane (12.5ml, 0.168mol), maintaining the reaction temperature 5h, then cooled to 0 , ice water was slowly added (200ml).Extracted with dichloromethane, the organic phase was dried over anhydrous sodium sulfate, filtered and rotary evaporated to give crude product after using Recrystallization from hexane to give ethyl N- -N- [3- (3- acetylphenyl)] acetamide (V) (26.8g, 90% yield) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydrogencarbonate In toluene at 120℃; Molecular sieve; | 19 A mixture of m-acetylaminoacetophenone (19a, 2 mmol, 354.4 mg) and aniline (2.4 mmol, 219.2 μl) was dissolved in toluene (30 ml), followed by the addition of NaHCO3 (10 mmol, 840 mg) and an appropriate amount of molecular sieves and refluxed at 120 ° C overnight. The reaction was completely removed by TLC and the insoluble material was removed by filtration and concentrated under reduced pressure. The column chromatography gave the imine compound 19b. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
49% | With silver hexafluoroantimonate; dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; N-(2,2,2-trimethylacetyl)glycine; silver(I) acetate In methanol at 70℃; Inert atmosphere; Sealed tube; regioselective reaction; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
59% | With dmap; triethylamine In acetonitrile at 78℃; for 72h; | 20.1 Step 1. tert-butyl acetyl(3-acetylphenyl)carbamate N-(3-acetylphenyl)acetamide (10 mmol, 1.77 g), (Boc) 2O (1.5 eq, 3.2 g) and ACN (35 mL) were added in a 100 ml Round-bottom flask. Triethyl amine (2.0 eq, 2.8 mL) and DMAP (0.2 eq, 24 mg) were added to the mixture and stirred at 78 for 3 days. After the reaction ended, the solvent was removed under reduced pressure. The reactant was then extracted with H 2O/EA three times, and the organic solvent layer was dried over MgSO 4 and concentrated in vacuo. After that, silica gel column chromatography was performed to provide the compound, tert-butyl acetyl(3-acetylphenyl)carbamate (1.63 g) (yield: 59%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
87% | Stage #1: 3-Acetamidoacetophenone With barium(II) hydroxide In ethanol; water at 20℃; for 0.333333h; Stage #2: 1-(3-bromopropyl)-1H-indole-2-carbaldehyde In ethanol; water at 20℃; for 12h; |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
73% | With oxygen; sodium docusate; copper(l) chloride In water at 80℃; for 3h; Green chemistry; chemoselective reaction; | Typical procedure for the synthesis of N-(pyridin-2-yl)benzamide (3a) General procedure: The magnetically stirred mixture of the 2-amino pyridine 1a (112.9 mg, 1.2 mmol), acetophenone 2a (120.2 mg, 1 mmol, 1equiv), CuCl (10 mol%, 9.9 mg), sodium dioctylsulphosuccinate (SDOSS, 5 mol%, 22.2 mg) in water (2 mL) was heated at 80 oC while oxygen gas was bubbled into the mixture for 3 h. After completion of the reaction (TLC), the mixture was cooled to room temperature and diluted with EtOAc (10 mL), filtered by ordinary filter paper to recover the catalyst. The organic layer was washed with brine and dried over anhydrous Na2SO4. The filtrate was concentrated under rotary vacuum evaporation, and the residue was charged on to chromatography (100-200 mesh silica gel) column and eluted with EtOAc-hexane to afford pure 3a ( 170.4 mg, 86%). All the remaining reactions were performed following this general procedure. The spectral data of the synthesised compounds are provided below. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium ethanolate In ethanol | ||
Stage #1: 3-Acetamidoacetophenone; oxalic acid diethyl ester With sodium ethanolate In diethyl ether; ethanol at 50℃; for 5h; Stage #2: With hydrogenchloride In water | 2.2. General Procedure for the Synthesis of β-diketonates General procedure: In situ made sodium ethoxide (5 mmol) in 5 ml of absoluteethanol was heated to 50°C. After reaching the temperature,a mixture of diethyl oxalate (6 mmol) and a methyl ketone(5 mmol), dissolved in 10 ml of anhydrous diethylether, was added dropwise. Rapidly, during the instillationto the mixture, precipitation of the sodium salt of a ligandoccurred. After 5 h of reaction time mixture was cooled, the precipitate was filtered off, washed with anhydrous diethylether, and dried at room temperature. The sodium salt of aligand was dissolved in water (200 ml) and acidified with 1M HCl solution to pH = 2. After acidification, if voluminousprecipitation of the ligand occurred (case of 2D and 2E),they were filtered, washed with water and left at room temperatureto dry. If not (case of 2B and 2C), they were extractedfrom water with methylene chloride. Methylene chloridesolution was dried with anhydrous Na2SO4, filtered, andat the end, methylene chloride was evaporated to obtain theoil of the ligands. All ligands were characterized by NMRspectroscopy (1H and 13C spectra of ligands 2B-E are accessiblein the ESI, Figure S1-S8). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
89 mg | Stage #1: 3'-acetamideacetophenone With sodium hydride In tetrahydrofuran; paraffin oil at 20℃; for 0.0833333h; Stage #2: oxalic acid diethyl ester In tetrahydrofuran; paraffin oil at 70℃; for 0.666667h; Stage #3: 2,2-difluoropropan-1-amine hydrochloride; 4-chlorobenzaldehyde Further stages; | 92.1 N-{3-[4-(4-chlorophenyl)-5-(2,2-difluoropropyl)-6-oxo-1,4,5,6-tetrahydropyrrolo[3,4-c]pyrazol-3-yl]phenyl}acetamide To a solution of 3-acetamideacetophenone (142 mg, CAS number: 7463-31-2) in tetrahydrofuran (10 mL), 60%- sodium hydride (dispersed in liquid paraffin) (105 mg) was added at room temperature, and the mixture was stirred at the same temperature for 5 minutes, and then diethyl oxalate (152 μL) was added, and the mixture was further stirred at 70° C. for 40 minutes. The reaction mixture was cooled to room temperature, and then concentrated under reduced pressure, acetic acid (8 mL) was added to the residue obtained, and the mixture was stirred at room temperature for 5 minutes. Subsequently, 4-chlorobenzaldehyde (225 mg), 2,2-difluoropropylamine hydrochloride (210 mg, CAS number: 868241-48-9), and triethylamine (665 μL) were sequentially added to the reaction mixture at room temperature, and the mixture was stirred at 100° C. for 7 hours. The reaction mixture was cooled to room temperature, hydrazine monohydrate (155 μL) was added, and the mixture was stirred at 100° C. for 4 hours and a half. The reaction mixture was cooled to room temperature, and then concentrated under reduced pressure, and a 1 M-aqueous sodium hydroxide solution was added to the residue to adjust the mixture to around neutrality. Then, the mixture was extracted with dichloromethane, and the organic layer obtained was dried over anhydrous sodium sulfate. After filtration, the solvent was distilled off under reduced pressure, and the residue obtained was sequentially purified by silica gel column chromatography (dichloromethane/methanol) and reverse phase HPLC to obtain the title compound (89 mg) as a solid. 1H-NMR (CDCl3) δ: 1.65 (3H, t, J=18.5 Hz), 2.21 (3H, s), 2.82-2.96 (1H, m), 4.17-4.34 (1H, m), 5.80 (1H, s), 6.80 (1H, d, J=7.9 Hz), 7.13-7.22 (3H, m), 7.33 (2H, d, J=8.5 Hz), 7.64 (1H, d, J=7.9 Hz), 7.88 (1H, s), 8.26 (1H, s),MS (m/z): 445 (M+H)+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
788 mg | Stage #1: 3'-acetamideacetophenone With sodium hydride In tetrahydrofuran; paraffin oil at 20℃; for 0.666667h; Stage #2: oxalic acid diethyl ester In tetrahydrofuran; paraffin oil at 70℃; for 1.5h; | 5 Ethyl 4-(3-acetamidephenyl)-2,4-dioxobutanoate To a solution of 3′-acetamideacetophenone (500 mg, CAS number: 7463-31-2) in tetrahydrofuran (35 mL), 55%- sodium hydride (dispersed in liquid paraffin) (369 mg) was added, and the mixture was stirred at room temperature for 40 minutes. Then, diethyl oxalate (1.3 mL) was added thereto, and the mixture was further stirred at 70° C. for 1 hour and a half. The reaction mixture was cooled to room temperature, acetic acid (565 μL) and water were added, and the mixture was extracted with ethyl acetate. The organic layer obtained was washed with brine, and then dried over anhydrous sodium sulfate. After filtration, the solvent was distilled off under reduced pressure, and the residue obtained was washed with a 2-propanol-water mixed solution and water, and then dried under reduced pressure to obtain the title compound (788 mg) as a solid. 1H-NMR (CDCl3) δ: 1.42 (3H, t, J=7.3 Hz), 2.22 (3H, s), 4.41 (2H, q, J=7.3 Hz), 7.05 (1H, s), 7.33 (1H, br s), 7.47 (1H, t, J=7.9 Hz), 7.73 (1H, d, J=7.9 Hz), 7.93 (1H, d, J=7.9 Hz), 8.00 (1H, br s) |
Tags: 7463-31-2 synthesis path| 7463-31-2 SDS| 7463-31-2 COA| 7463-31-2 purity| 7463-31-2 application| 7463-31-2 NMR| 7463-31-2 COA| 7463-31-2 structure
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