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CAS No. : | 609-09-6 | MDL No. : | MFCD00009121 |
Formula : | C7H10O5 | Boiling Point : | No data available |
Linear Structure Formula : | CH3CH2OOCCOCOOCH2CH3 | InChI Key : | DBKKFIIYQGGHJO-UHFFFAOYSA-N |
M.W : | 174.15 | Pubchem ID : | 69105 |
Synonyms : |
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Chemical Name : | Diethyl 2-oxomalonate |
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | 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 |
---|---|---|
In ethanol; for 5h;Reflux; | Step 2: Compound 9-12 (0.35 g, 2.43 mmol) and diethyl ketomalonate (0.39 mL, 2.55 mmol) were mixed in EtOH (7 mL). The resulting solution was heated to reflux for 5 h. The mixture was cooled to room temperature and concentrated. The residue was purified by column chromatography (silica gel, eluted with 5% EtOAc/hexanes, 20% EtOAc/hexanes, 30% EtOAc/hexanes) to give the desired compound 9-13 and 9-14. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Step 2:To a solution of diethyl 2-oxobutanedione (176 g, 0.94 mol) in toluene (2 L) was added 3 -methyl- l-(l-methylethyl)-lH-pyrazol-5 -amine (82.5 g, 0.59 mol), and the mixture stirred at 62 °C, overnight. After cooling to room temperature, the mixture was concentrated in vacuo and the crude residue dissolved into acetic acid (1.5 L). The mixture was heated at reflux for 2 h. After cooling to room temperature, the mixture was concentrated in vacuo to afford a solid residue, which was recrystallized from DCM to afford the desired product as a yellow colored solid. The collected solid was suspended in ethanol (1510 niL) and THF (216 mL) followed by addition of 3N NaOH (334 mL) and the reaction mixture was stirred at 40 °C for 40 min. The mixture was concentrated in vacuo to remove the volatiles and the aqueous phase acidified using IN HC1. The resulting precipitate was collected by filtration and dried under high vacuum to give the title compound, 3-methyl-l-(l-methylethyl)-6-oxo-6,7-dihydro-lH-pyrazolo[3,4-?]pyridine-4- carboxylic acid, as 51.38 g. LCMS E-S (?+?) = 236.1. 1H NMR (400 MHz, DMSO-d6) ? ppm 1.35 (d, J=6.8 Hz, 6 H), 2.41 (s, 3H), 4.84-4.91 (m, 1H), 6.64 (s, 1H). Carboxylic acid proton not observed. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
at 130℃; for 24h; | Into a 100-mL round-bottom flask, was placed <strong>[175711-83-8]1-(4-chloro-2-fluorophenyl)ethan-1-one</strong> (10 g,57.94 mmol, 1.00 equiv) and 1,3-diethyl 2-oxopropanedioate (15 mL). The resulting solutionwas stirred for 24 hours at 130C. The resulting mixture was concentrated under vacuum. This resulted in 24 g (crude) of 1 ,3-diethyl 2-[2-(4-chloro-2-fluorophenyl)-2-oxoethyl]-2- hydroxypropanedioate as a black oil which was used without further purification. |