Β-2-呋喃基乙醇

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: 2-Furanethanol (2 g) in DMF (5 ml) was added dropwise to a suspension of sodium hydride (0.43 g) in DMF (20 ml). The mixture was stirred for 30 min and added dropwise to 1,6-dibromohexane (21.8 g). The resulting suspension was heated at 60°-70° for 18 h, poured into water (200 ml) and extracted with diethyl ether (3×100 ml). The dried extract was evaporated and the residue was purified on a column of silica eluted with cyclohexane. The resulting oil was fractionally distilled (Kugelrohr) to give the title compound as a colourless oil (1.7 g) b.p. 75°-80°/0.3 Torr. The resulting suspension was heated at 60°-70° for 18 h extracted with diethyl ether (3×100 ml) The dried extract was evaporated the residue was purified on a column of silica eluted with cyclohexane The resulting oil was fractionally distilled (Kugelrohr)

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

实验步骤: 2-Furanethanol (2 g) in DMF (5 ml) was added dropwise to a suspension of sodium hydride (0.43 g) in DMF (20 ml). The mixture was stirred for 30 min and added dropwise to 1,6-dibromohexane (21.8 g). The resulting suspension was heated at 60°-70° for 18 h, poured into water (200 ml) and extracted with diethyl ether (3×100 ml). The dried extract was evaporated and the residue was purified on a column of silica eluted with cyclohexane. The resulting oil was fractionally distilled (Kugelrohr) to give the title compound as a colourless oil (1.7 g) b.p. 75°-80°/0.3 Torr. The resulting suspension was heated at 60°-70° for 18 h extracted with diethyl ether (3×100 ml) The dried extract was evaporated the residue was purified on a column of silica eluted with cyclohexane The resulting oil was fractionally distilled (Kugelrohr)

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

实验步骤: Imidazole (3.65 g, 53.6 mmol) and TBSCl (6.47 g, 42.9 mmol) were added to the solution of compound 255A (4.00 g, 35.7 mmol) in 50 mL of DMF. The mixture was stirred at rt for 2 h and then the reaction mixture was poured into ether. The ether solution was washed with water (1×), 1 N HCl (1×), water (1×) and brine (1×). The organic layer was dried over Na2SO4 and concentrated under reduced pressure. Purification by flash chromatography on silica gel eluting with 30% CH2Cl2/70% hexane gave 7.4 g (32.7 mmol, 91.7%) of 255B as a colorless oil. The ether solution was washed with water (1×), 1 N HCl (1×), water (1×) and brine (1×) The organic layer was dried over Na2SO4 concentrated under reduced pressure Purification by flash chromatography on silica gel eluting with 30% CH2Cl2/70% hexane

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

实验步骤: 2-(2-Hydroxyethyl)furan (1.00 g, 8.93 mmol, Example 255A) was dissolved in DMF at 25° C. and imidazole (0.790 g, 11.6 mmol) was added. TBSCl (1.35 g, 8.93 mmol) was then added in portions over 5 minutes. After 2 h, the reaction was poured into diethyl ether (300 mL) and washed sequentially with water (1×100 mL), 1 N HCl (1×100 mL), and brine (1×100 mL). The combined organics were then dried over magnesium sulfate and concentrated in vacuo. Compound 241A was isolated as a clear oil (1.77 g) and was taken on without purification. HPLC: 100% at 4.233 min (retention time) (YMC S5 ODS column 4.6×50 mm, 10-90% aqueous methanol over 4 minutes containing 0.2% phosphoric acid, 4 mL/min, monitoring at 220 nm). washed sequentially with water (1×100 mL), 1 N HCl (1×100 mL), and brine (1×100 mL) The combined organics were then dried over magnesium sulfate concentrated in vacuo

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

实验步骤: 2-(2-Hydroxyethyl)furan (1.00 g, 8.93 mmol, Example 255A) was dissolved in DMF at 25° C. and imidazole (0.790 g, 11.6 mmol) was added. TBSCl (1.35 g, 8.93 mmol) was then added in portions over 5 minutes. After 2 h, the reaction was poured into diethyl ether (300 mL) and washed sequentially with water (1×100 mL), 1 N HCl (1×100 mL), and brine (1×100 mL). The combined organics were then dried over magnesium sulfate and concentrated in vacuo. Compound 241A was isolated as a clear oil (1.77 g) and was taken on without purification. HPLC: 100% at 4.233 min (retention time) (YMC S5 ODS column 4.6×50 mm, 10-90% aqueous methanol over 4 minutes containing 0.2% phosphoric acid, 4 mL/min, monitoring at 220 nm). washed sequentially with water (1×100 mL), 1 N HCl (1×100 mL), and brine (1×100 mL) The combined organics were then dried over magnesium sulfate concentrated in vacuo

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

实验步骤: Imidazole (3.65 g, 53.6 mmol) and TBSCl (6.47 g, 42.9 mmol) were added to the solution of compound 255A (4.00 g, 35.7 mmol) in 50 mL of DMF. The mixture was stirred at rt for 2 h and then the reaction mixture was poured into ether. The ether solution was washed with water (1×), 1 N HCl (1×), water (1×) and brine (1×). The organic layer was dried over Na2SO4 and concentrated under reduced pressure. Purification by flash chromatography on silica gel eluting with 30% CH2Cl2/70% hexane gave 7.4 g (32.7 mmol, 91.7%) of 255B as a colorless oil. The ether solution was washed with water (1×), 1 N HCl (1×), water (1×) and brine (1×) The organic layer was dried over Na2SO4 concentrated under reduced pressure Purification by flash chromatography on silica gel eluting with 30% CH2Cl2/70% hexane

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

实验步骤: Imidazole (3.65 g, 53.6 mmol) and TBSCl (6.47 g, 42.9 mmol) were added to the solution of compound 255A (4.00 g, 35.7 mmol) in 50 mL of DMF. The mixture was stirred at rt for 2 h and then the reaction mixture was poured into ether. The ether solution was washed with water (1×), 1 N HCl (1×), water (1×) and brine (1×). The organic layer was dried over Na2SO4 and concentrated under reduced pressure. Purification by flash chromatography on silica gel eluting with 30% CH2Cl2/70% hexane gave 7.4 g (32.7 mmol, 91.7%) of 255B as a colorless oil. The ether solution was washed with water (1×), 1 N HCl (1×), water (1×) and brine (1×) The organic layer was dried over Na2SO4 concentrated under reduced pressure Purification by flash chromatography on silica gel eluting with 30% CH2Cl2/70% hexane

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

实验步骤: 2-(2-Hydroxyethyl)furan (1.00 g, 8.93 mmol, Example 255A) was dissolved in DMF at 25° C. and imidazole (0.790 g, 11.6 mmol) was added. TBSCl (1.35 g, 8.93 mmol) was then added in portions over 5 minutes. After 2 h, the reaction was poured into diethyl ether (300 mL) and washed sequentially with water (1×100 mL), 1 N HCl (1×100 mL), and brine (1×100 mL). The combined organics were then dried over magnesium sulfate and concentrated in vacuo. Compound 241A was isolated as a clear oil (1.77 g) and was taken on without purification. HPLC: 100% at 4.233 min (retention time) (YMC S5 ODS column 4.6×50 mm, 10–90% aqueous methanol over 4 minutes containing 0.2% phosphoric acid, 4 mL/min, monitoring at 220 nm). washed sequentially with water (1×100 mL), 1 N HCl (1×100 mL), and brine (1×100 mL) The combined organics were then dried over magnesium sulfate concentrated in vacuo

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

实验步骤: 2-(2-Hydroxyethyl)furan (1.00 g, 8.93 mmol, Example 255A) was dissolved in DMF at 25° C. and imidazole (0.790 g, 11.6 mmol) was added. TBSCl (1.35 g, 8.93 mmol) was then added in portions over 5 minutes. After 2 h, the reaction was poured into diethyl ether (300 mL) and washed sequentially with water (1×100 mL), 1 N HCl (1×100 mL), and brine (1×100 mL). The combined organics were then dried over magnesium sulfate and concentrated in vacuo. Compound 241A was isolated as a clear oil (1.77 g) and was taken on without purification. HPLC: 100% at 4.233 min (retention time) (YMC S5 ODS column 4.6×50 mm, 10–90% aqueous methanol over 4 minutes containing 0.2% phosphoric acid, 4 mL/min, monitoring at 220 nm). washed sequentially with water (1×100 mL), 1 N HCl (1×100 mL), and brine (1×100 mL) The combined organics were then dried over magnesium sulfate concentrated in vacuo

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

实验步骤: 2-Furanethanol (2 g) in DMF (5 ml) was added dropwise to a suspension of sodium hydride (0.43 g) in DMF (20 ml). The mixture was stirred for 30 min and added dropwise to 1,6-dibromohexane (21.8 g). The resulting suspension was heated at 60°-70° for 18 h, poured into water (200 ml) and extracted with diethyl ether (3×100 ml). The dried extract was evaporated and the residue was purified on a column of silica eluted with cyclohexane. The resulting oil was fractionally distilled (Kugelrohr) to give the title compound as a colourless oil (1.7 g) b.p. 75°-80°/0.3 Torr. The resulting suspension was heated at 60°-70° for 18 h extracted with diethyl ether (3×100 ml) The dried extract was evaporated the residue was purified on a column of silica eluted with cyclohexane The resulting oil was fractionally distilled (Kugelrohr)

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

实验步骤: 80% Sodium hydride (0.155 g) was added portionwise to a solution of 2-phthalimido-ethanethiol (1.03 g) in dry dimethylformamide at 0°. After 20 mins a solution of 2-furanethanol, 4-methylbenzenesulphonate (1.33 g) in dry dimethylformamide was added dropwise and the solution stirred overnight at room temperature. The mixture was poured into ice-water and 2-[[2-furanyl)ethyl]thio]ethyl-1H-isoindole-1,3(2H)-dione isolated as a white solid (1.3 g) m.p. 53°-55°.