4-(chloromethyl)-1,2-dimethoxybenzene

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:97.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3,4-dimethoxybenzyl chloride (10 g, 53.6 mmol) was combined with piperazine (2.3 g, 26.8 mmol) in anhydrous DMF (30 ml) and heated with stirring under nitrogen for 8 hours at 95-100° C. The cooled reaction mixture was diluted with water (100 ml) and acidified to pH 1 with concentrated hydrochloric acid. The white precipitate was collected by filtration and washed with water (50 ml). The solid was re-suspended in water (50 ml) and the pH adjusted to >9 by the dropwise addition of sodium hydroxide solution (50% NaOH in water). The resultant white solid was collected by filtration and dried under vacuum at 50° C., yield 10 g. heated The cooled reaction mixture The white precipitate was collected by filtration washed with water (50 ml) the pH adjusted to >9 by the dropwise addition of sodium hydroxide solution (50% NaOH in water) The resultant white solid was collected by filtration dried under vacuum at 50° C.

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

Procedure: 3,4-dimethoxybenzyl alcohol (20 g, 119 mmol) was dissolved in toluene (60 ml) and cooled to 0° C. Thionyl chloride (7.48 g, 61.4 mmol) was added dropwise to the cooled solution of the alcohol over a period of 30 minutes, and the reaction was maintained at 0° C. for an additional 30 minutes. The reaction was quenched by pouring onto an ice/water mix (100 ml), and the organic phase was separated. The aqueous phase was then extracted into toluene (2×20 ml) and the combined toluene solution was dried over anhydrous sodium sulfate. The toluene was removed at reduced pressure to afford an oil which solidified upon standing, with a yield of 21 g. The material was characterized as a single spot by thin layer chromatography (TLC). the reaction was maintained at 0° C. for an additional 30 minutes The reaction was quenched by pouring onto an ice/water mix (100 ml) the organic phase was separated The aqueous phase was then extracted into toluene (2×20 ml) the combined toluene solution was dried over anhydrous sodium sulfate The toluene was removed at reduced pressure to afford an oil which

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

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

Procedure: N-3,3-Diphenylpropylpiperazine in the amount of 2.8 g (0.01 mole), 1.87 g (0.01 mole) 9f 3,4-dimethoxybenzyl chloride, 0.5 g (0.005 mole) of triethylamine, 1.4 g (0.01 mole) of potassium carbonate, and 2 ml of dimethylformamide were mixed with 20 ml of toluene, and the resulting mixture was heated at the refluxing temperature for 2 hours. The reaction liquid was left to cool, washed by shaking with water, and the organic solvent layer was concentrated under reduced pressure to obtain 3.6 g (83.6% yield) of oily 1-(3,3-diphenylpropyl)-4-(3,4-dimethoxybenzyl)piperazine. the resulting mixture was heated at the refluxing temperature for 2 hours The reaction liquid was left to cool washed the organic solvent layer was concentrated under reduced pressure

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

Procedure: N-3,3-Diphenylpropylpiperazine in the amount of 2.8 g (0.01 mole), 1.87 g (0.01 mole) 9f 3,4-dimethoxybenzyl chloride, 0.5 g (0.005 mole) of triethylamine, 1.4 g (0.01 mole) of potassium carbonate, and 2 ml of dimethylformamide were mixed with 20 ml of toluene, and the resulting mixture was heated at the refluxing temperature for 2 hours. The reaction liquid was left to cool, washed by shaking with water, and the organic solvent layer was concentrated under reduced pressure to obtain 3.6 g (83.6% yield) of oily 1-(3,3-diphenylpropyl)-4-(3,4-dimethoxybenzyl)piperazine. the resulting mixture was heated at the refluxing temperature for 2 hours The reaction liquid was left to cool washed the organic solvent layer was concentrated under reduced pressure