5-乙酰氧基甲基-2-呋喃醛

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 39.4 kg (219 mol) of D-fructose and 5.9 kg of dried acidic Dowex® 50WX8-200 ion exchanger (styrene-divinylbenzene copolymer resin with SO3H groups, obtainable from The Dow Chemical Company, Midland, U.S.A.) in the H form were introduced with stirring into 90 l of NMP and heated to 110° C. for 6 h. After cooling, the reaction mixture was filtered and washed with 8 l of NMP. The filtrate was admixed with stirring with 390 g (3.2 mol) of 4-(N,N-dimethylamino)pyridine and 20.5 1 (217 mol) of acetic anhydride at 20-25° C. within 1 h. After continuing the reaction for 1 h, the brown reaction mixture was freed of the solvent at 90-100° C. under reduced pressure (of 50-10 mbar). After cooling, the residue was admixed with 160 l of MtBE, 60 1 of water and 4 kg of activated carbon. The suspension was filtered though Celite®. After the phase separation, the solvent of the filtrate was distilled off at 50° C. under reduced pressure (20 mbar) and the residue was fractionally distilled under reduced pressure at 106-110° C./5 mbar. ) in the H form were introduced After cooling the reaction mixture was filtered washed with 8 l of NMP the reaction for 1 h was freed of the solvent at 90-100° C. under reduced pressure (of 50-10 mbar) After cooling The suspension was filtered though Celite® After the phase separation the solvent of the filtrate was distilled off at 50° C. under reduced pressure (20 mbar) the residue was fractionally distilled under reduced pressure at 106-110° C./5 mbar

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: In a round flask, 2 mL of methyl cyanide (acetonitrile) as an organic solvent was introduced, 0.145 g (1 mmol) of 5-chloromethylfurfural (CMF, compound I) was dissolved in the organic solvent, 0.170 g (1 mmol) of 1-ethyl-3-methylimidazolium acetate was added to the solution, and then the mixed solution was reacted at normal pressure and room temperature for 5 minutes. After the reaction, the reaction product was extracted by the addition of a small amount of water (5 mL) and ethyl acetate (added twice by 20 mL) to obtain an organic layer. The obtained organic layer was concentrated under reduced pressure to obtain light yellow liquid 5-acetoxymethylfurfural (AcHMF, compound II). The yield thereof is 36%. was added to the solution the mixed solution was reacted at normal pressure and room temperature for 5 minutes After the reaction the reaction product was extracted by the addition of a small amount of water (5 mL) and ethyl acetate ( added twice by 20 mL) to obtain an organic layer The obtained organic layer was concentrated under reduced pressure

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: In a round flask, 2 mL of methyl cyanide (acetonitrile) as an organic solvent was introduced, 0.145 g (1 mmol) of 5-chloromethylfurfural (CMF, compound I) was dissolved in the organic solvent, 0.170 g (1 mmol) of 1-ethyl-3-methylimidazolium acetate was added to the solution, and then the mixed solution was reacted at normal pressure and room temperature for 5 minutes. After the reaction, the reaction product was extracted by the addition of a small amount of water (5 mL) and ethyl acetate (added twice by 20 mL) to obtain an organic layer. The obtained organic layer was concentrated under reduced pressure to obtain light yellow liquid 5-acetoxymethylfurfural (AcHMF, compound II). The yield thereof is 36%. was added to the solution the mixed solution was reacted at normal pressure and room temperature for 5 minutes After the reaction the reaction product was extracted by the addition of a small amount of water (5 mL) and ethyl acetate ( added twice by 20 mL) to obtain an organic layer The obtained organic layer was concentrated under reduced pressure

反应条件: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 39.4 kg (219 mol) of D-fructose and 5.9 kg of dried acidic Dowex® 50WX8-200 ion exchanger (styrene-divinylbenzene copolymer resin with SO3H groups, obtainable from The Dow Chemical Company, Midland, U.S.A.) in the H form were introduced with stirring into 90 l of NMP and heated to 110° C. for 6 h. After cooling, the reaction mixture was filtered and washed with 8 l of NMP. The filtrate was admixed with stirring with 390 g (3.2 mol) of 4-(N,N-dimethylamino)pyridine and 20.5 1 (217 mol) of acetic anhydride at 20-25° C. within 1 h. After continuing the reaction for 1 h, the brown reaction mixture was freed of the solvent at 90-100° C. under reduced pressure (of 50-10 mbar). After cooling, the residue was admixed with 160 l of MtBE, 60 1 of water and 4 kg of activated carbon. The suspension was filtered though Celite®. After the phase separation, the solvent of the filtrate was distilled off at 50° C. under reduced pressure (20 mbar) and the residue was fractionally distilled under reduced pressure at 106-110° C./5 mbar. ) in the H form were introduced After cooling the reaction mixture was filtered washed with 8 l of NMP the reaction for 1 h was freed of the solvent at 90-100° C. under reduced pressure (of 50-10 mbar) After cooling The suspension was filtered though Celite® After the phase separation the solvent of the filtrate was distilled off at 50° C. under reduced pressure (20 mbar) the residue was fractionally distilled under reduced pressure at 106-110° C./5 mbar

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Under nitrogen atmosphere, to a solution of 2.0 g of 5-acetoxymethyl-2-furanaldehyde and 1.1 mL of morpholine in 35 mL of 1,2-dichloroethane was added 4.0 g of sodium triacetoxy borohydride at room temperature, and stirred at this temperature for 3 hours. The reaction solution was diluted with dichloromethane, washed successively with saturated aqueous sodium hydrogen carbonate and saturated brine, and then dried over anhydrous magnesium sulfate. The solvent was evaporated, and the residue was purified and separated by silica gel column chromatography, to afford 2.3 g of the title compound as a colorless oil. washed successively with saturated aqueous sodium hydrogen carbonate and saturated brine dried over anhydrous magnesium sulfate The solvent was evaporated the residue was purified separated by silica gel column chromatography

反应条件: temp:22.01; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Under nitrogen atmosphere, to a solution of 2.0 g of 5-acetoxymethyl-2-furanaldehyde and 1.1 mL of morpholine in 35 mL of 1,2-dichloroethane was added 4.0 g of sodium triacetoxy borohydride at room temperature, and stirred at this temperature for 3 hours. The reaction solution was diluted with dichloromethane, washed successively with saturated aqueous sodium hydrogen carbonate and saturated brine, and then dried over anhydrous magnesium sulfate. The solvent was evaporated, and the residue was purified and separated by silica gel column chromatography, to afford 2.3 g of the title compound as a colorless oil. washed successively with saturated aqueous sodium hydrogen carbonate and saturated brine dried over anhydrous magnesium sulfate The solvent was evaporated the residue was purified separated by silica gel column chromatography

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution containing 7.26 cm3 of DAST (diethylamino sulphide trifluoride) and 30 cm3 of methylene chloride is added at 5° C. to a solution containing 10 g of the product prepared in Stage A and 100 cm3 of methylene chloride. The reaction mixture is agitated at 20° C. for half an hour and is taken to reflux for 1 hour. It is maintained under agitation for 18 hours at 20° C. and taken to reflux for 3 hours, then treated with sodium acid carbonate and extracted with methylene chloride. After drying and concentrating, 12 g of a product is obtained which is chromatographed on silica eluting with a hexane--ethyl acetate mixture (8-2). In this way 5.5 g of desired product is obtained. is added at 5° C. to a solution to reflux for 1 hour It is maintained under agitation for 18 hours at 20° C. to reflux for 3 hours extracted with methylene chloride After drying concentrating

反应条件: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 10.05 cm3 of acetyl chloride is added at 5° C. to a solution containing 16.2 g of 5-(hydroxy methyl) 2-furan-carboxaldehyde and 200 cm3 of methylene chloride. Then 11.4 cm3 of pyridine and 50 cm3 of methylene chloride are added. The reaction mixture is maintained under agitation for 3 hours at 20° C. It is then treated with an aqueous solution of sodium acid phosphate and extracted with methylene chloride, followed by drying and concentrating. After chromatography on silica eluting with a hexane--ethyl acetate mixture (7-3), 19.35 g of desired product is obtained. extracted with methylene chloride by drying concentrating

反应条件: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 10.05 ml of acetyl chloride were added at 5° C. to a solution of 16.2 g of 5-hydroxymethyl-2-furancarboxaldehyde and 200 ml of methylene chloride and 11.4 ml of pyridine and 50 ml of methylene chloride were then added. The reaction mixture was stirred for 3 hours at 20° C. and the reaction mixture was treated with an aqueous sodium dihydrogenphosphate solution and extracted with methylene chloride. The extract was dried and concentrated to obtain 19.35 g of the desired product after chromatography on silica by eluting with a hexane/ethyl acetate (7/3) mixture. were then added extracted with methylene chloride The extract was dried concentrated