甲基 2-(2-羟基乙氧基)乙酸甲酯

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To solution of methyl(2-hydroxyethoxy)acetate (540 mg), imidazole (411 mg) and triphenylphosphine (1.37 g) in ether (2 mL) and CH3CN (1 mL) was added iodine (1.43 g) under ice-water cooling and the mixture was stirred at 0° C. for 2 hours. After insolubles were filterred off, the filtrates were diluted with AcOEt, washed with aq Na2SO3 solution and brine, dried over MgSO4, and evaporated in vacuo. The residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (20:1-5:1) to give methyl(2-iodoethoxy)acetate as colorless oil (898 mg). washed with aq Na2SO3 solution and brine dried over MgSO4 evaporated in vacuo The residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (20:1-5:1)

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To solution of methyl(2-hydroxyethoxy)acetate (540 mg), imidazole (411 mg) and triphenylphosphine (1.37 g) in ether (2 mL) and CH3CN (1 mL) was added iodine (1.43 g) under ice-water cooling and the mixture was stirred at 0° C. for 2 hours. After insolubles were filterred off, the filtrates were diluted with AcOEt, washed with aq Na2SO3 solution and brine, dried over MgSO4, and evaporated in vacuo. The residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (20:1-5:1) to give methyl(2-iodoethoxy)acetate as colorless oil (898 mg). washed with aq Na2SO3 solution and brine dried over MgSO4 evaporated in vacuo The residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (20:1-5:1)

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

实验步骤: A mixture of methyl[2-(tetrahydro-2H-pyran-2-yloxy)ethoxy]acetate (1.07 g) and pyridinium p-toluenesulfonate (24.6 mg) in MeOH (10 mL) was heated under reflux for 2 hours. After evaporation of solvent, the residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (10:1-1:3) to give methyl(2-hydroxyethoxy)acetate as colorless oil (555 mg). was heated under reflux for 2 hours After evaporation of solvent the residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (10:1-1:3)

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To solution of methyl(2-hydroxyethoxy)acetate (540 mg), imidazole (411 mg) and triphenylphosphine (1.37 g) in ether (2 mL) and CH3CN (1 mL) was added iodine (1.43 g) under ice-water cooling and the mixture was stirred at 0° C. for 2 hours. After insolubles were filtered off, the filtrates were diluted with AcOEt, washed with aq Na2SO3 solution and brine, dried over MgSO4, and evaporated in vacuo. The residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (20:1-5:1) to give methyl(2-iodoethoxy)acetate as colorless oil (898 mg). After insolubles were filtered off the filtrates were diluted with AcOEt washed with aq Na2SO3 solution and brine dried over MgSO4 evaporated in vacuo The residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (20:1-5:1)

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To solution of methyl(2-hydroxyethoxy)acetate (540 mg), imidazole (411 mg) and triphenylphosphine (1.37 g) in ether (2 mL) and CH3CN (1 mL) was added iodine (1.43 g) under ice-water cooling and the mixture was stirred at 0° C. for 2 hours. After insolubles were filtered off, the filtrates were diluted with AcOEt, washed with aq Na2SO3 solution and brine, dried over MgSO4, and evaporated in vacuo. The residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (20:1-5:1) to give methyl(2-iodoethoxy)acetate as colorless oil (898 mg). After insolubles were filtered off the filtrates were diluted with AcOEt washed with aq Na2SO3 solution and brine dried over MgSO4 evaporated in vacuo The residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (20:1-5:1)

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

实验步骤: A mixture of methyl [2-(tetrahydro-2H-pyran-2-yloxy)ethoxy]acetate (1.07 g) and pyridinium p-toluenesulfonate (24.6 mg) in MeOH (10 mL) was heated under reflux for 2 hours. After evaporation of solvent, the residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (10:1-1:3) to give methyl (2-hydroxyethoxy)acetate as colorless oil (555 mg). was heated under reflux for 2 hours After evaporation of solvent the residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (10:1-1:3)

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

实验步骤: A mixture of methyl [2-(tetrahydro-2H-pyran-2-yloxy)ethoxy]acetate (1.07 g) and pyridinium p-toluenesulfonate (24.6 mg) in MeOH (10 mL) was heated under reflux for 2 hours. After evaporation of solvent, the residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (10:1-1:3) to give methyl (2-hydroxyethoxy)acetate as colorless oil (555 mg). was heated under reflux for 2 hours After evaporation of solvent the residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (10:1-1:3)

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

实验步骤: A mixture of methyl [2-(tetrahydro-2H-pyran-2-yloxy)ethoxy]acetate (1.07 g) and pyridinium p-toluenesulfonate (24.6 mg) in MeOH (10 mL) was heated under reflux for 2 hours. After evaporation of solvent, the residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (10:1-1:3) to give methyl (2-hydroxyethoxy)acetate as colorless oil (555 mg). was heated under reflux for 2 hours After evaporation of solvent the residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (10:1-1:3)

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To solution of methyl(2-hydroxyethoxy)acetate (540 mg), imidazole (411 mg) and triphenylphosphine (1.37 g) in ether (2 mL) and CH3CN (1 mL) was added iodine (1.43 g) under ice-water cooling and the mixture was stirred at 0° C. for 2 hours. After insolubles were filterred off, the filtrates were diluted with AcOEt, washed with aq Na2SO3 solution and brine, dried over MgSO4, and evaporated in vacuo. The residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (20:1-5:1) to give methyl(2-iodoethoxy)acetate as colorless oil (898 mg). washed with aq Na2SO3 solution and brine dried over MgSO4 evaporated in vacuo The residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (20:1-5:1)

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

实验步骤: A mixture of methyl[2-(tetrahydro-2H-pyran-2-yloxy)ethoxy]acetate (1.07 g) and pyridinium p-toluenesulfonate (24.6 mg) in MeOH (10 mL) was heated under reflux for 2 hours. After evaporation of solvent, the residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (10:1-1:3) to give methyl(2-hydroxyethoxy)acetate as colorless oil (555 mg). was heated under reflux for 2 hours After evaporation of solvent the residue was purified by silica gel column chromatography eluting with a mixture of hexane and AcOEt (10:1-1:3)