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CAS No. : | 106263-50-7 | MDL No. : | MFCD03844205 |
Formula : | C10H9ClO3 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | JIFTXSSZTRPMNW-UHFFFAOYSA-N |
M.W : | 212.63 | Pubchem ID : | 20274428 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | |
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 |
---|---|---|
99% | With sulfuric acid; for 144.0h;Reflux; | 50 g (235 mmol) of <strong>[106263-50-7]4-chlorophenyl-4-oxobutanoic acid</strong> were solubilized in 300 ml of isopropanol, 0.63 ml (11.76 mmol) of sulfuric acid were added to this solution. The mixture was refluxed with heating for 6 d with magnetic stirring. After returning to r.t., the mixture was concentrated in vacuo, the crude residue was directly purified by flash chromatography on a silica gel cartridge (eluent: 100% dichloromethane). 59.83 g (yield=>99%) of isopropyl 4-chlorophenyl-4-oxobutanoate were obtained as a colorless oil. LC-MS: m/z=255 (MH+) UV purity at 254 nm=95%. 1H NMR (300 MHz, DMSO) δ 8.13-7.85 (m, 2H), 7.70-7.47 (m, 2H), 4.86 (dt, J=12.5, 6.3 Hz, 1H), 3.29-3.22 (m, 2H), 2.65-2.54 (m, 2H), 1.16 (d, J=6.3 Hz, 6H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
56% | With bromobenzene; magnesium; In tetrahydrofuran; at -40 - 0℃; for 1.5h; | General procedure: At -40 C, glutaric anhydride (B) (60mmol) / anhydrous THF (125mL)Slowly add 2chlorophenylmagnesium bromide (A ') / THF (50mL) to the solutionMagnesium filings (55 mmol) and bromobenzene (45 mmol) were generated in situ in the solution. after finishing,At the same temperature, the reaction mixture was continuously stirred for 1.5 hours,It was then cooled with 1N hydrochloric acid (250 mL). The mixture was extracted with ethyl acetate (250 mL3), and the extract was dried over anhydrous MgSO4,Concentrated in vacuo to give crude 5- (2-chlorophenyl) -5-oxovaleric acid (1'a),It was recrystallized from petroleum ether and ethyl acetate with a yield of 32%. |
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