2-乙酰基-5-羟甲基呋喃

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: In a flame dried round-bottomed flask equipped with a magnetic stir bar and under inert atmosphere (N2), a solution of 1-(5-hydroxymethyl-furan-2-yl)-ethanone (2.00 g, 14.27 mmol) in dry CH2Cl2 (29 mL) was treated at 0° C. with Et3N (2.58 mL, 18.55 mmol) followed by DMAP (178 mg, 1.43 mmol) and Ms-Cl (1.33 mL, 17.13 mmol). After stirring at rt for 3 h, the reaction was quenched with water. The layers were separated and the aq. layer extracted with CH2Cl2 (3×). The org. layer was dried over MgSO4, filtered, and the solvents were removed under reduced pressure to give crude 1-(5-chloromethyl-furan-2-yl)-ethanone as a brown oil. Part of this crude material (2.33 g, 14.72 mmol) was dissolved in dry DMF (50 mL) and treated with NaN3 (2.90 g, 44.16 mmol) at 80° C. for 24 h. The reaction mixture was then cooled down to rt and partitioned between EA and water. The layers were separated and the aq. layer extracted with EA (1×). The combined org. extracts were dried over Na2SO4, filtered and concentrated under reduced pressure to give crude 1-(5-azidomethyl-furan-2-yl)-ethanone as a brown oil. LC-MS-conditions 02: tR=0.81 min; [M+AcCN+H]+=207.50. the reaction was quenched with water The layers were separated the aq. layer extracted with CH2Cl2 (3×) layer was dried over MgSO4 filtered the solvents were removed under reduced pressure

反应条件: temp:35.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Crude 1-[5-(tetrahydro-pyran-2-yloxymethyl)-furan-2-yl]-ethanone (89 g, 0.40 mol) was dissolved in MeOH (500 mL) and treated with Amberlyst 15 (15 g) at rt. The reaction mixture was stirred at 35° C. for 1 h, cooled to rt and filtered over celite. Et3N (1 mL) was added and the mixture was evaporated to dryness. The residue was stripped with methylcyclohexane and 1-(5-hydroxymethyl-furan-2-yl)ethanone was obtained as a yellow oil that solidified on standing. cooled to rt filtered over celite Et3N (1 mL) was added the mixture was evaporated to dryness

反应条件: temp:35.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Crude 1-[5-(tetrahydro-pyran-2-yloxymethyl)-furan-2-yl]-ethanone (89 g, 0.40 mol) was dissolved in MeOH (500 mL) and treated with Amberlyst 15 (15 g) at rt. The reaction mixture was stirred at 35° C. for 1 h, cooled to rt and filtered over celite. Et3N (1 mL) was added and the mixture was evaporated to dryness. The residue was stripped with methylcyclohexane and 1-(5-hydroxymethyl-furan-2-yl)ethanone was obtained as a yellow oil that solidified on standing. cooled to rt filtered over celite Et3N (1 mL) was added the mixture was evaporated to dryness

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: In a flame dried round-bottomed flask equipped with a magnetic stir bar and under inert atmosphere (N2), a solution of 1-(5-hydroxymethyl-furan-2-yl)-ethanone (2.00 g, 14.27 mmol) in dry CH2Cl2 (29 mL) was treated at 0° C. with Et3N (2.58 mL, 18.55 mmol) followed by DMAP (178 mg, 1.43 mmol) and Ms-Cl (1.33 mL, 17.13 mmol). After stirring at rt for 3 h, the reaction was quenched with water. The layers were separated and the aq. layer extracted with CH2Cl2 (3×) The org. layer was dried over MgSO4, filtered, and the solvents were removed under reduced pressure to give 3.93 g (quant.) of crude 1-(5-chloromethyl-furan-2-yl)-ethanone as a brown oil. Part of this crude material (1.718 g, 10.83 mmol) in DMF (10.3 mL) was added to a solution of 4-nitro-2H-[1,2,3]triazole (10.30 g of a 10% solution in acetone, 9.03 mmol) in DMF (10.3 mL) pre-treated for 30 min with DIPEA (3.09 mL, 18.06 mmol) and the reaction mixture was stirred overnight at 50° C. Water (32 mL), followed by EA (65 mL) were added. The aq. layer was extracted with EA (65 mL) and the combined org. extracts were dried over Na2SO4, filtered, and the solvents were removed under reduced pressure. Purification of the residue by FC (2:1 hept-EA) gave the title compound as a yellow solid: TLC:rf (2:1 hept-EA)=0.20. LC-MS-conditions 02: tR=0.85 min, [M+H]+=237.46. the reaction was quenched with water The layers were separated the aq. layer extracted with CH2Cl2 (3×) The org layer was dried over MgSO4 filtered the solvents were removed under reduced pressure

反应条件: temp:35.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Crude 1-[5-(tetrahydro-pyran-2-yloxymethyl)-furan-2-yl]-ethanone (89 g, 0.40 mol) was dissolved in MeOH (500 mL) and treated with Amberlyst 15 (15 g) at rt. The reaction mixture was stirred at 35° C. for 1 h, cooled to rt and filtered over celite. Et3N (1 mL) was added and the mixture was evaporated to dryness. The residue was stripped with methylcyclohexane and 1-(5-hydroxymethyl-furan-2-yl)-ethanone (55 g, 99%) was obtained as a yellow oil that solidified on standing. cooled to rt filtered over celite Et3N (1 mL) was added the mixture was evaporated to dryness

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

实验步骤: In a flame dried round-bottomed flask equipped with a magnetic stir bar and under inert atmosphere (N2), a solution of 1-(5-hydroxymethyl-furan-2-yl)-ethanone (2.00 g, 14.27 mmol) in dry CH2Cl2 (29 mL) was treated at 0° C. with Et3N (2.58 mL, 18.55 mmol) followed by DMAP (178 mg, 1.43 mmol) and Ms-Cl (1.33 mL, 17.13 mmol). After stirring at rt for 3 h, the reaction was quenched with water. The layers were separated and the aq. layer extracted with CH2Cl2 (3×). The org. layer was dried over MgSO4, filtered, and the solvents were removed under reduced pressure to give crude 1-(5-chloromethyl-furan-2-yl)-ethanone as a brown oil. Part of this crude material (2.33 g, 14.72 mmol) was dissolved in dry DMF (50 mL) and treated with NaN3 (2.90 g, 44.16 mmol) at 80° C. for 24 h. The reaction mixture was then cooled down to rt and partitioned between EA and water. The layers were separated and the aq. layer extracted with EA (1×). The combined org. extracts were dried over Na2SO4, filtered and concentrated under reduced pressure to give crude 1-(5-azidomethyl-furan-2-yl)-ethanone as a brown oil. LC-MS-conditions 02: tR=0.81 min; [M+AcCN+H]+=207.50. the reaction was quenched with water The layers were separated the aq. layer extracted with CH2Cl2 (3×) layer was dried over MgSO4 filtered the solvents were removed under reduced pressure

反应条件: temp:35.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Crude 1-[5-(tetrahydro-pyran-2-yloxymethyl)-furan-2-yl]-ethanone (89 g, 0.40 mol) was dissolved in MeOH (500 mL) and treated with Amberlyst 15 (15 g) at rt. The reaction mixture was stirred at 35° C. for 1 h, cooled to rt and filtered over celite. Et3N (1 mL) was added and the mixture was evaporated to dryness. The residue was stripped with methylcyclohexane and 1-(5-hydroxymethyl-furan-2-yl)ethanone was obtained as a yellow oil that solidified on standing. cooled to rt filtered over celite Et3N (1 mL) was added the mixture was evaporated to dryness