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CAS No. : | 6093-80-7 | MDL No. : | MFCD00510072 |
Formula : | C12H12O4 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | - |
M.W : | 220.22 | Pubchem ID : | - |
Synonyms : |
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Chemical Name : | 5,7-Dimethoxy-4-methyl-2H-chromen-2-one |
Signal Word: | Class: | ||
Precautionary Statements: | UN#: | ||
Hazard Statements: | Packing Group: |
* 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 |
---|---|---|
87.5% | With potassium carbonate In acetone for 2h; Reflux; | 2.3. 5,7-Dimethoxy-4-methyl-chromen-2-one (10) Methyl iodide (0.54 mL, 8.7 mmol) was added to a mixture of 9(0.5 g, 2.9 mmol) and potassium carbonate (0.8 g, 5.8 mmol) in anhydrousacetone (20 mL). Then reflux the mixture for 2 h. The mixturewas cooled at room temperature and added dist. water, and filtration,washed with water. The crude product was crystallized with MeOH togive the product 10.1H NMR (500 MHz, CD3OD) δ 2.56 (d, J=1.0 Hz,3H), 3.88 (s, 3H), 3.90 (s, 3H), 5.96 (d, J=1.0 Hz, 1H), 6.26 (d,J=2.0 Hz, 1H), 6.51 (d, J=2.0 Hz, 1H). |
With potassium carbonate; acetone |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
79% | With dipotassium peroxodisulfate; In dimethyl sulfoxide; at 90℃; for 12h; | General procedure: To a 10 mL Schlenk tube, coumarin 1a (0.3 mmol, 1 equiv),difluoromethane-sulfinate (0.6 mmol, 2 equiv), K2S2O8 (3 equiv.)were dissolved in DMSO (2.0 mL). Then the mixture was stirred at90 C for 12 h. To the residue was added water (10 mL) andextracted with ethyl acetate (5 mL 3). The combined organicfractions were dried over Na2SO4, and concentrated under vacuumto yield the crude product, which was purified by column chromatographyto give the target product. The same procedure was applied for to produce other compounds, after purification by silicagel column chromatography (EA: PE 1/10 to 1/2). |