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CAS No. : | 57595-23-0 | MDL No. : | MFCD19707049 |
Formula : | C6H8O4 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | FCUDJBUBWCJOLK-UHFFFAOYSA-N |
M.W : | 144.13 | Pubchem ID : | 14666564 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | N/A |
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 |
---|---|---|
24% | To a stirred slurry of sodium hydride (2.2 g, 55 mmol) in dry ether (40 mL) at room temperature (rt) was added methyl glycolate (4.5 g, 50 mmol) dropwise. The reaction mixture was stirred for 14 h, then it was concentrated under vacuo. To the solid was added methyl acrylate (5.2 g, 55 mmol) in DMSO (20 mL) at O0C and the mixture was stirred for 15 min, and the cool bath was removed and it was stirred for 45 min. The mixture was poured into 5% H2SO4 (60 mL), and it was extracted with ether (150 mL). The organic layer was dried, concentrated and purified by column chromatography to give 1.7 g (24%) of the title compound. 1H NMR (CDCl3): 4.51-4.40 (m, 2H), 4.03 (q, J = 8.1 Hz, 2H), 3.80 (s, 3H), 3.54 (t, J = 8.1 Hz, IH). | |
4.5 g (31%) | With sodium; In dimethyl sulfoxide; | Synthesis of 2,5-dihydro furan 3,4-dicarboxylic acid 2.3 g (0.1 mol) sodium was pulverized under toluene and the solvent was replaced with 75 ml ether. 11 ml (0.1 mol) methylglycolate was added to the mixture under stirring until the evolution of hydrogen gas had ceased. To the dry sodium derivative remaining after destination of the ether, a solution of 10 ml (0.12 mol) distilled methylacrylate in 50 ml DMSO was added while the reaction was kept at 4 C. After 15 minutes the solution was stirred for an additional 30-40 min at room temperature and poured into aqueous H2SO4 at 4 C. and extracted with ether. Washing of the organic layer with a saturated NaCl solution, drying over NaSO4 and removal of the ether was followed by destination under reduced pressure to give 4.5 g (31%) of 4-oxo-tetrahydro furane 3-carboxylic acidmethyl ester. |
To a suspension of NaH (185 g, 4.6 mol, 60% weight) in THF (4 L) was charged methyl 2-hydroxyacetate (380 g, 4.2 mol) dropwise at 0 C. After the addition, the reaction mixture was stirred for 30 mm at ambient temperature and then re-cooled to 0 C. A solution of methylacrylate (400 g, 4.64 mol) in DMSO (2 L) was added dropwise over 2 hours at 0 C. The resulting reaction mixture was stirred for 30 mm at 0 C and for 2 h at 20 C. After TLC showed that the start material was consumed completely, the mixture was quenched with 1.5 L of 5% H2S04 (slowly) and extracted with EtOAc (3 L). The combined organic layers were washed with brine (1 L), dried over Na2SO4, filtered and concentrated to afford Methyl 4-oxotetrahydrofuran-3-carboxylate (11) as a liquid. The crude oil was used in the next step without further purification. ?H NMR (CDC13, 400 MHz) : 4.3 5-4.45 (m, 2H), 3.86-3.97 (m, 2H), 3.72 (s, 3H), 3.47 (t, 1H). |
To a suspension of NaH (185 g, 4.6 mol, 60 weight) in T HF (4 L) was charged methyl 2-hydroxyacetate (380 g, 4.2 mol) dropwise at 0 . After the addition, the reaction mixture was stirred for 30 min at ambient temperature and then re-cooled to 0 . A solution of methyl acrylate (400 g, 4.64 mol) in DMSO (2 L) was added dropwise over 2 hours at 0 . The resulting reaction mixture was stirred for 30 min at 0 and for 2 h at 20 . After TLC showed that the start material was consumed completely, the mixture was quenched with 1.5 L of 5 H2SO4(slowly) and extracted with EtOAc (3 L) . The combined organic layers were washed with brine (1 L) , dried over Na2SO4, filtered and concentrated to afford Methyl 4-oxotetrahydrofuran-3-carboxylate (11) as a liquid. The crude oil was used in the next step without further purification.1H NMR (CDCl3, 400 MHz) delta: 4.35-4.45 (m, 2H) , 3.86-3.97 (m, 2H) , 3.72 (s, 3H) , 3.47 (t, 1H) . |
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