2,4-二氯苯乙醇

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:

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:

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:

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

实验步骤: To a solution of 17.8 g (67.9 mmol) of triphenylphosphane, 8.8 ml (67.9 mmol) of 2-(2,4-dichlorophenyl)ethanol and 16 g (61.3 mmol) of 4-bromo-3,5-dihydroxybenzoic acid ethyl ester in 25 ml of THF was added a solution of 10.6 ml (67.9 mmol) of DEAD in 40 ml of THF within 45 min between 620 and 18° C. After 16 h at room temperature the solvent was removed and the residue was stirred with cyclohexane/ethyl acetate (1/1) and filtered. The solid residue was stirred with cyclohexane and filtered. The remaining solid was separated by chromatography (cyclohexane/ethyl acetate (1/1)) to give 25.6 g (96%) of the title compound. After 16 h at room temperature the solvent was removed filtered The solid residue was stirred with cyclohexane filtered The remaining solid was separated by chromatography (cyclohexane/ethyl acetate (1/1))

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

实验步骤: To a solution of 17.8 g (67.9 mmol) of triphenylphosphane, 8.8 ml (67.9 mmol) of 2-(2,4-dichlorophenyl)ethanol and 16 g (61.3 mmol) of 4-bromo-3,5-dihydroxybenzoic acid ethyl ester in 25 ml of THF was added a solution of 10.6 ml (67.9 mmol) of DEAD in 40 ml of THF within 45 min between 620 and 18° C. After 16 h at room temperature the solvent was removed and the residue was stirred with cyclohexane/ethyl acetate (1/1) and filtered. The solid residue was stirred with cyclohexane and filtered. The remaining solid was separated by chromatography (cyclohexane/ethyl acetate (1/1)) to give 25.6 g (96%) of the title compound. After 16 h at room temperature the solvent was removed filtered The solid residue was stirred with cyclohexane filtered The remaining solid was separated by chromatography (cyclohexane/ethyl acetate (1/1))

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

实验步骤: To a solution of 10 g (38.3 mmol) of triphenylphosphane in 100 ml of THF were added 6.7 g (3.83 mmol) of DEAD over 5 min at room temperature. After 30 min at room temperature, 5 g (25.5 mmol) of 3-hydroxy-4-methoxybenzoic acid ethyl ester and 4.87 g (25.5 mmol) of 2-(2,4-dichlorophenyl)ethanol were added and the mixture was stirred at room temperature for 12 h. The solvent was removed and the residue was separated by chromatography to give 3.6 g (38%) of the title compound. The solvent was removed the residue was separated by chromatography