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Chemical Structure| 848598-50-5 Chemical Structure| 848598-50-5

Structure of 848598-50-5

Chemical Structure| 848598-50-5

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Product Details of [ 848598-50-5 ]

CAS No. :848598-50-5
Formula : C11H12O4
M.W : 208.21
SMILES Code : O=C(O)CC(OCCC1=CC=CC=C1)=O
MDL No. :MFCD24480531

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Application In Synthesis of [ 848598-50-5 ]

* 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.

  • Downstream synthetic route of [ 848598-50-5 ]

[ 848598-50-5 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 139-85-5 ]
  • [ 848598-50-5 ]
  • [ 104594-70-9 ]
YieldReaction ConditionsOperation in experiment
With piperidine; pyridine; at 20℃; General procedure: The Meldrum?s acid (3.6g, 25mmol) was added into toluene (50ml), then added alcohol or phenol (25mmol). The mixture was heated and refluxed for 5 hrs. When the mixture was cooled to room temperature, added substituted benzaldehyde (10mmol), pyridine (2.5ml) and piperidine (0.25ml). The stirring continued at room temperature, using TLC to trace the reaction until the reaction completely finished. The solvents were distilled out in vacuum; the residue was dissolved in diethyl ether (about 30ml), washed with saturated solution of sodium bicarbonate two times (20ml×2), then diluted hydrochloride acid and distilled water, respectively. The ether phase was driedby anhydrous MgSO4 overnight. After removal of the drier, the solvent was distilled out to get crude solid. (If the crude product was oil, dissolved in dichloromethane (10ml) and then was subjected to chromatograph on a silica gel column (15 g), eluted with ethyl acetate and petroleum ether 1:15. The eluted fraction was distilled outto get crude product. ) The crude solid was recrystallized from a mixture of benzene and diethyl ether (8:2) to afford pure product.
270 g With piperidine; In pyridine; toluene; at 95℃; for 15h; Add 1L of toluene to the 3L reaction flask,SM1 (cyclopropane (isopropyl) isopropyl ester, 240 g, commercially available) was added in succession under mechanical stirringAnd SM2 (phenylethanol, 202 g, commercially available),After the addition,Warm up to 100C to start timingStop the reaction after 8 hoursCool naturally to cool down to room temperatureSM3 (3,4-dihydroxybenzaldehyde, 160 g, commercially available) was added while stirring was continued.Then add pyridine 166ml and piperidine 17ml,Then it warms up to an internal temperature of 95C.The reaction was stopped after 15 hours of reaction.Cool down to room temperatureAfter adding 1 L of ethyl acetate, the organic phase was washed successively with 1 L of 1M hydrochloric acid solution and 1 L of saturated saline, and the organic phase was dried over anhydrous sodium sulfate for 30 minutes, filtered, and the organic solvent was evaporated in vacuo to obtain a crude product. 2L n-hexane was filtered after beatingThe cake was vacuum dried in a box at 40C for 24 hours to give 270 g of a product of caffeic acid phenylethyl ester.
General procedure: The desired amount of malonic acid mono esters (0.6 mmol, 1.2 equiv.) was dissolved in toluene (1 mL) followed by the addition of pyridine (12.5 mmol, 25 equiv., 1 mL) and piperidine (0.80 mmol, 1.6 equiv., 79 muL). This mixture was stirred at r.t. for 10 min to form enolates before the desired aldehyde (0.5 mmol,1.0 equiv.) was added at 0C. The reaction mixture was continued to bestirred at r.t. for 1?6 days. TLC was used to monitor the reaction progress. Once the reaction was complete, the reaction mixture was transferred to a separatory funnel using EtOAc (15 mL) and washed with 5% HCl (10 mL×2) and distilled water (10 mL×2). After removalof the ethyl acetate by rotatory evaporation, the crude product was purified by automated flash chromatography, eluting with an ethylacetate/hexanes or methanol/methylene chloride gradient to afford the desired products.
 

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