bromomethylcyclopentane

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: The subtitle compound was prepared by the method of Preparation 61 from 1-(bromomethyl)cyclopentane [Preparation 63] and sodium sulphite. The crude product was purified by recrystallisation from water to afford sodium cyclopentylmethanesulfonate as a white solid. The crude product was purified by recrystallisation from water

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

Procedure: A stirred solution of 3-hydroxy-4-methoxy- benzaldehyde (5.74 g) in dry dimethylformamide (50 mL) is treated with cyclopentylmethyl bromide (7.34 g) and potassium carbonate (15 g), and the solution is heated at 600C for 24 hours. After cooling and filtration, the solution is evaporated to low bulk and dissolved in ethyl acetate (100 mL). The organic solution is washed with aqueous sodium hydroxide solution (4×50 mL; 2 N) and water (2×50 mL), dried over magnesium sulfate, and evaporated to give 3-cyclopentyl- methoxy- 4-methoxybenzaldehyde (6.5 g) in the form of a light brown oil. After cooling filtration the solution is evaporated to low bulk dissolved in ethyl acetate (100 mL) The organic solution is washed with aqueous sodium hydroxide solution (4×50 mL; 2 N) and water (2×50 mL) dried over magnesium sulfate evaporated