oxiran-2-ylmethyl benzoate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture containing 14.8 g (0.2 mole) of glycidol, 150 ml of anhydrous ether, 16 g (0.4 mole) of pyridine and 28 g (0.2 mole) of benzoyl chloride was stirred at room temperature for 2 hours. The mixture was filtered and the ether was evaporated to leave an oil. This oil was distilled to give 21 g (60%) of colorless oil: b.p. 92° C./0.5 mm Hg. The NMR and IR spectra were consistent with the assigned structure. The mixture was filtered the ether was evaporated to leave an oil This oil was distilled

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of oxiran-2-ylmethyl benzoate (3.0 g, 16.8 mmol), (2S)-3-(3,4-dihydroxyphenyl)-2-[(tert-butoxy)carbonylamino]propanoic acid (6.0 g, 20.2 mmol), and tetrabutylammonium bromide (542 mg, 1.7 mmol) in anhydrous toluene was heated to 90° C. for 18 hrs. The reaction mixture was concentrated to dryness under reduced pressure, diluted with ethyl acetate, and washed with water twice followed by the addition of a saturated NaHCO3 solution and brine. The organic layer was dried through MgSO4 and concentrated under reduced pressure. Chromatography (silica gel, 1:1 ethyl acetate/hexane) of the residue afforded 2.05 g (26%) of 2-Hydroxy-3-phenylcarbonyloxypropyl (2S)-3-(3,4-dihydroxyphenyl)-2-[(tert-butoxy)carbonylamino]propanoate. The reaction mixture was concentrated to dryness under reduced pressure diluted with ethyl acetate washed with water twice followed by the addition of a saturated NaHCO3 solution and brine The organic layer was dried through MgSO4 concentrated under reduced pressure

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of oxiran-2-ylmethyl benzoate (3.0 g, 16.8 mmol), (2S)-3-(3,4-dihydroxyphenyl)-2-[(tert-butoxy)carbonylamino]propanoic acid (6.0 g, 20.2 mmol), and tetrabutylammonium bromide (542 mg, 1.7 mmol) in anhydrous toluene was heated to 90° C. for 18 hrs. The reaction mixture was concentrated to dryness under reduced pressure, diluted with ethyl acetate, and washed with water twice followed by the addition of a saturated NaHCO3 solution and brine. The organic layer was dried through MgSO4 and concentrated under reduced pressure. Chromatography (silica gel, 1:1 ethyl acetate/hexane) of the residue afforded 2.05 g (26%) of 2-Hydroxy-3-phenylcarbonyloxypropyl (2S)-3-(3,4-dihydroxyphenyl)-2-[(tert-butoxy)carbonylamino]propanoate. The reaction mixture was concentrated to dryness under reduced pressure diluted with ethyl acetate washed with water twice followed by the addition of a saturated NaHCO3 solution and brine The organic layer was dried through MgSO4 concentrated under reduced pressure

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Benzoyl chloride (1.2 mL, 10.0 mmol) was added to a solution of glycidol (0.67 mL, 10.0 mmol) and pyridine (0.81 mL, 10.0 mmol) in anhydrous dichloromethane at 0° C. The reaction mixture was further stirred at 0° C. for 60 min. The reaction mixture was then concentrated to dryness under reduced pressure, diluted with ethyl acetate, and washed with 10% citric acid twice followed by the addition of a saturated NaHCO3 solution and brine. The organic phase was dried over MgSO4 and concentrated to dryness to yield 1.8 g (100%) of Oxiran-2-ylmethyl benzoate. The reaction mixture was then concentrated to dryness under reduced pressure diluted with ethyl acetate washed with 10% citric acid twice followed by the addition of a saturated NaHCO3 solution and brine The organic phase was dried over MgSO4 concentrated to dryness

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture containing 14.8 g (0.2 mole) of glycidol, 150 ml of anhydrous ether, 16 g (0.4 mole) of pyridine and 28 g (0.2 mole) of benzoyl chloride was stirred at room temperature for 2 hours. The mixture was filtered and the ether was evaporated to leave an oil. This oil was distilled to give 21 g (60%) of colorless oil: b.p. 92° C./0.5 mm Hg. The NMR and IR spectra were consistent with the assigned structure. The mixture was filtered the ether was evaporated to leave an oil This oil was distilled

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture containing 14.8 g (0.2 mole) of glycidol, 150 ml of anhydrous ether, 16 g (0.4 mole) of pyridine and 28 g (0.2 mole) of benzoyl chloride was stirred at room temperature for 2 hours. The mixture was filtered and the ether was evaporated to leave an oil. This oil was distilled to give 21 g (60%) of colorless oil: b.p. 92° C./0.5 mm Hg. The NMR and IR spectra were consistent with the assigned structure. The mixture was filtered the ether was evaporated to leave an oil This oil was distilled

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of oxiran-2-ylmethyl benzoate (3.0 g, 16.8 mmol), (2S)-3-(3,4-dihydroxyphenyl)-2-[(tert-butoxy)carbonylamino]propanoic acid (6.0 g, 20.2 mmol), and tetrabutylammonium bromide (542 mg, 1.7 mmol) in anhydrous toluene was heated to 90° C. for 18 hrs. The reaction mixture was concentrated to dryness under reduced pressure, diluted with ethyl acetate, and washed with water twice followed by the addition of a saturated NaHCO3 solution and brine. The organic layer was dried through MgSO4 and concentrated under reduced pressure. Chromatography (silica gel, 1:1 ethyl acetate/hexane) of the residue afforded 2.05 g (26%) of 2-Hydroxy-3-phenylcarbonyloxypropyl (2S)-3-(3,4-dihydroxyphenyl)-2-[(tert-butoxy)carbonylamino]propanoate. The reaction mixture was concentrated to dryness under reduced pressure diluted with ethyl acetate washed with water twice followed by the addition of a saturated NaHCO3 solution and brine The organic layer was dried through MgSO4 concentrated under reduced pressure

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Benzoyl chloride (1.2 mL, 10.0 mmol) was added to a solution of glycidol (0.67 mL, 10.0 mmol) and pyridine (0.81 mL, 10.0 mmol) in anhydrous dichloromethane at 0° C. The reaction mixture was further stirred at 0° C. for 60 min. The reaction mixture was then concentrated to dryness under reduced pressure, diluted with ethyl acetate, and washed with 10% citric acid twice followed by the addition of a saturated NaHCO3 solution and brine. The organic phase was dried over MgSO4 and concentrated to dryness to yield 1.8 g (100%) of Oxiran-2-ylmethyl benzoate. The reaction mixture was then concentrated to dryness under reduced pressure diluted with ethyl acetate washed with 10% citric acid twice followed by the addition of a saturated NaHCO3 solution and brine The organic phase was dried over MgSO4 concentrated to dryness

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture containing 14.8 g (0.2 mole) of glycidol, 150 ml of anhydrous ether, 16 g (0.4 mole) of pyridine and 28 g (0.2 mole) of benzoyl chloride was stirred at room temperature for 2 hours. The mixture was filtered and the ether was evaporated to leave an oil. This oil was distilled to give 21 g (60%) of colorless oil: b.p. 92° C./0.5 mm Hg. The NMR and IR spectra were consistent with the assigned structure. The mixture was filtered the ether was evaporated to leave an oil This oil was distilled

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of oxiran-2-ylmethyl benzoate (3.0 g, 16.8 mmol), (2S)-3-(3,4-dihydroxyphenyl)-2-[(tert-butoxy)carbonylamino]propanoic acid (6.0 g, 20.2 mmol), and tetrabutylammonium bromide (542 mg, 1.7 mmol) in anhydrous toluene was heated to 90° C. for 18 hrs. The reaction mixture was concentrated to dryness under reduced pressure, diluted with ethyl acetate, and washed with water twice followed by the addition of a saturated NaHCO3 solution and brine. The organic layer was dried through MgSO4 and concentrated under reduced pressure. Chromatography (silica gel, 1:1 ethyl acetate/hexane) of the residue afforded 2.05 g (26%) of 2-Hydroxy-3-phenylcarbonyloxypropyl(2S)-3-(3,4-dihydroxyphenyl)-2-[(tert-butoxy)carbonylamino]propanoate. The reaction mixture was concentrated to dryness under reduced pressure diluted with ethyl acetate washed with water twice followed by the addition of a saturated NaHCO3 solution and brine The organic layer was dried through MgSO4 concentrated under reduced pressure

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Benzoyl chloride (1.2 mL, 10.0 mmol) was added to a solution of glycidol (0.67 mL, 10.0 mmol) and pyridine (0.81 mL, 10.0 mmol) in anhydrous dichloromethane at 0° C. The reaction mixture was further stirred at 0° C. for 60 min. The reaction mixture was then concentrated to dryness under reduced pressure, diluted with ethyl acetate, and washed with 10% citric acid twice followed by the addition of a saturated NaHCO3 solution and brine. The organic phase was dried over MgSO4 and concentrated to dryness to yield 1.8 g (100%) of Oxiran-2-ylmethyl benzoate. The reaction mixture was then concentrated to dryness under reduced pressure diluted with ethyl acetate washed with 10% citric acid twice followed by the addition of a saturated NaHCO3 solution and brine The organic phase was dried over MgSO4 concentrated to dryness

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of oxiran-2-ylmethyl benzoate (3.0 g, 16.8 mmol), (2S)-3-(3,4-dihydroxyphenyl)-2-[(tert-butoxy)carbonylamino]propanoic acid (6.0 g, 20.2 mmol), and tetrabutylammonium bromide (542 mg, 1.7 mmol) in anhydrous toluene was heated to 90° C. for 18 hrs. The reaction mixture was concentrated to dryness under reduced pressure, diluted with ethyl acetate, and washed with water twice followed by the addition of a saturated NaHCO3 solution and brine. The organic layer was dried through MgSO4 and concentrated under reduced pressure. Chromatography (silica gel, 1:1 ethyl acetate/hexane) of the residue afforded 2.05 g (26%) of 2-Hydroxy-3-phenylcarbonyloxypropyl (2S)-3-(3,4-dihydroxyphenyl)-2-[(tert-butoxy)carbonylamino]propanoate. The reaction mixture was concentrated to dryness under reduced pressure diluted with ethyl acetate washed with water twice followed by the addition of a saturated NaHCO3 solution and brine The organic layer was dried through MgSO4 concentrated under reduced pressure