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CAS No. : | 13831-31-7 | MDL No. : | MFCD00011535 |
Formula : | C4H5ClO3 | Boiling Point : | - |
Linear Structure Formula : | ClCOCH2OCOCH3 | InChI Key : | HZDNNJABYXNPPV-UHFFFAOYSA-N |
M.W : | 136.53 | Pubchem ID : | 26297 |
Synonyms : |
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Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P261-P280-P305+P351+P338-P310 | UN#: | 3265 |
Hazard Statements: | H314-H335 | Packing Group: | Ⅱ |
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 |
---|---|---|
With pyridine; In dichloromethane; | EXAMPLE 12 Preparation of 2-(acetoxyacetylamino)-6-methoxybenzamide: To a solution of <strong>[1591-38-4]2-amino-6-methoxybenzamide</strong> (1.7 g) in methylene chloride (20 ml) is added pyridine (1.6 ml), and thereto is added dropwise acetoxyacetyl chloride (1.1 ml) which is cooled in an ice bath. The mixture is stirred at room temperature for 2 hours, and thereafter, the solvent is distilled off under reduced pressure. The resulting crude crystals are washed with water and then are recrystallized from ethanol to give the title compound (2.1 g) having the following physical properties. Melting point: 163 -165 C. IR (KBr) υ: 3465, 3195, 1750, 1695, 1650, 1605, 1520, 1470, 1440, 1395, 1235, 1095, 1080, 925, 815, 785, 540 cm-1. NMR (DMSO-d6) δ: 11.45 (1 H, brs), 8.05-6.84 (3 H, m), 7.91 (2 H, brs), 4.60 (2 H, s), 3.82 (3 H, s), 2.20 (3 H, s) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With pyridine; In dichloromethane; | EXAMPLE 13 Preparation of 2-(acetoxyacetylamino)-6-methoxybenzonitrile: To a solution of <strong>[1591-37-3]2-amino-6-methoxybenzonitrile</strong> (3.7 g) in methylene chloride (50 ml) is added pyridine (2.4 ml), and thereto is added dropwise acetoxyacetyl chloride (2.7 ml) which is cooled in an ice bath. The mixture is stirred at room temperature for 1 hour, and thereafter, the solvent is distilled off under reduced pressure. The resulting crude crystals are washed with water and ether and then are recrystallized from ethanol to give the title compound (5.4 g) having the following physical properties. Melting point: 131 -132 C. IR (KBr) upsilon: 3435, 3210, 3095, 3070, 2220, 1775, 1695, 1610, 1590, 1555, 1485, 1460, 1440, 1425, 1390, 1380, 1305, 1275, 1245, 1220, 1100, 970, 845, 795, 740, 725 cm-1. NMR (DMSO-d6) delta: 9.94 (1 H, brs), 7.54-6.96 (3 H, m), 4.65 (2 H, s), 3.85 (3 H, s), 2.10 (3 H, s). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60.7% | With pyridine; In dichloromethane; at -40 - 20℃;Cooling with acetone-dry ice; | Step 1 Acetic acid (2-oxo-2,3-dihydro-1H-indol-5-ylcarbamoyl)-methyl ester 5-Amino-1,3-dihydro-indol-2-one 30c (500 mg, 3.38 mmol) was dissolved in 10 ml of dichloromethane under stirring at room temperature, and pyridine (470 mul, 5 mmol) was added to the solution at -40° C. in a dry ice-acetone bath. Acetic acid chlorocarbonylmethyl ester (473 mg, 3.48 mmol) was dissolved in 10 ml of dichloromethane, the resulting solution was added dropwise to the above reaction solution. Upon completion of the addition, the dry ice-acetone was removed, and the reaction mixture was allowed to warm up to room temperature and stirred overnight. After thin lay chromatography showed the disappearance of starting materials, the reaction mixture was filtered. The filter cake was washed with water (10 ml*3) and recrystallized to obtain the title compound acetic acid (2-oxo-2,3-dihydro-1H-indol-5-ylcarbamoyl)-methyl ester 44a (510 mg, yield 60.7percent) as a yellow solid. |
60.7% | With pyridine; In dichloromethane; at -40 - 20℃; | 5-Amino-1,3-dihydro-indol-2-one 30c (500 mg, 3.38 mmol) was dissolved in 10 ml of dichloromethane under stirring at room temperature, and pyridine (470mul, 5 mmol) was added to the solution at -40°C in a dry ice-acetone bath. Acetic acid chlorocarbonylmethyl ester (473 mg, 3.48 mmol) was dissolved in 10 ml of dichloromethane, the resulting solution was added dropwise to the above reaction solution. Upon completion of the addition, the dry ice-acetone was removed, and the reaction mixture was allowed to warm up to room temperature and stirred overnight. After thin lay chromatography showed the disappearance of starting materials, the reaction mixture was filtered. The filter cake was washed with water (10 ml.x.3) and recrystallized to obtain the title compound acetic acid (2-oxo-2,3-dihydro-1H-indol-5-ylcarbamoyl)-methyl ester 44a (510 mg, yield 60.7percent) as a yellow solid. MS m/z (ESI): 247.7[M-1] |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
77% | With potassium carbonate; In benzene; at 20℃; for 1.5h; | General procedure: Acetoxyacetyl chloride (17.6 mmol) was slowly added to a mixture of K2CO3(15.2 mmol), compound 2 (14 mmol) and benzene (34 mL) at room temperature. TLC monitored the reaction. Then the mixture was cooled, washed with water, and filtered.The filtrate was washed and dried over magnesium sulfate anhydrous. Benzene was removed under vacuum. The crude products were recrystallized with EtOAc and light petroleum. The physical and spectra data of the compounds 3a-f were as follows |