3-(3,4-dimethoxyphenyl)propan-1-ol

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: Compound 18-1 (2.00 g) was dissolved in methylene chloride (50 ml), triphenylphosphine (2.97 g) and N-bromosuccinimide (1.99 g) were added under ice-cooling, and the mixture was stirred under ice-cooling for 1 hr, and further at room temperature for 15 hr. The reaction mixture was washed with water and saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. Diethyl ether (100 ml) was added, and the precipitated triphenylphosphine oxide was filtered off. The concentrate of the filtrate was purified by silica gel column chromatography (hexane:ethyl acetate=5:1-3:1) to give the object product (2.17 g) as a pale-brown oil. cooling cooling for 1 hr The reaction mixture was washed with water and saturated brine dried over anhydrous magnesium sulfate The solvent was evaporated under reduced pressure Diethyl ether (100 ml) was added the precipitated triphenylphosphine oxide was filtered off The concentrate of the filtrate was purified by silica gel column chromatography (hexane:ethyl acetate=5:1-3:1)

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

Procedure: A solution of 2.0 g (10.2 mmol) of the aldehyde prepared in step A in 40 ml CH2Cl2 is oxidised in the dark by the addition of 4.32 g (10.2 mmol) Dess-Marin periodinane. The reaction is complete after 30 minutes. The suspension formed is taken up into 50 ml CH2Cl2 and washed twice with sodium bicarbonate and 20% sodium thiosulphate solution. Concentration of the organic layer affords a beige crude product which is purified by chromatography hexane/ethyl acetate) to yield a yellow oil. The suspension formed washed twice with sodium bicarbonate and 20% sodium thiosulphate solution

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

Procedure: A solution of 6.0 g (28.5 mmol) 3-(3,4-dimethoxyphenyl)-propionic acid in 120 ml anhydrous THF is cooled to 0° C. and treated within 15 minutes with 42.75 ml borane THF complex (1 M solution). Stirring is continued overnight at rt. The resulting clear solution is cooled with an ice/water bath and hydrolyzed by the addition of 100 ml saturated ammonium chloride solution. Extractive work-up with diethyl ether furnishes a colourless oil, which is purified by chromatography (hexane/ethyl acetate) to yield a colourless oil. treated within 15 minutes with 42.75 ml borane THF complex (1 M solution) is purified by chromatography (hexane/ethyl acetate) to yield a colourless oil

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

Procedure: A solution of 6.0 g (28.5 mmol) 3-(3,4-dimethoxyphenyl)-propionic acid in 120 ml anhydrous THF is cooled to 0° C. and treated within 15 minutes with 42.75 ml borane THF complex (1 M solution). Stirring is continued overnight at rt. The resulting clear solution is cooled with an ice/water bath and hydrolyzed by the addition of 100 ml saturated ammonium chloride solution. Extractive work-up with diethyl ether furnishes a colourless oil, which is purified by chromatography (hexane/ethyl acetate) to yield a colourless oil. treated within 15 minutes with 42.75 ml borane THF complex (1 M solution) is purified by chromatography (hexane/ethyl acetate) to yield a colourless oil

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

Procedure: Under N2, methanesulfonyl chloride (129.7 g, 1.132 m, 87.6 cc) was added dropwise over 1-1.5 hours at -10° to 0° C. to a mechanically stirred solution of 3-(3,4-dimethoxyphenyl)-1-propanol (202 g, 1.03 mole) and Et3N (158.3 g, 1.56 mole, 218 cc) in CH2Cl2 (1.5 1) contained in a 5 1, 3-neck flask. The reaction mixture was stirred at 0° C. for 1 hour and then washed successively with icewater (1×700 cc), cold 3N HCl (1×700 cc), saturated NaHCO3 solution (1×700 cc) and brine (1×700 cc). The organic solution was dried (Na2SO4) and concentrated in vacuo to an orange syrup; yield: 282 g (100%). washed successively with icewater (1×700 cc), cold 3N HCl (1×700 cc), saturated NaHCO3 solution (1×700 cc) and brine (1×700 cc) The organic solution was dried (Na2SO4) concentrated in vacuo to an orange syrup

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

Procedure: Under N2, methanesulfonyl chloride (129.7 g, 1.132 m, 87.6 cc) was added dropwise over 1-1.5 hours at -10° to 0° C. to a mechanically stirred solution of 3-(3,4-dimethoxyphenyl)-1-propanol (202 g, 1.03 mole) and Et3N (158.3 g, 1.56 mole, 218 cc) in CH2Cl2 (1.5 1) contained in a 5 1, 3-neck flask. The reaction mixture was stirred at 0° C. for 1 hour and then washed successively with icewater (1×700 cc), cold 3N HCl (1×700 cc), saturated NaHCO3 solution (1×700 cc) and brine (1×700 cc). The organic solution was dried (Na2SO4) and concentrated in vacuo to an orange syrup; yield: 282 g (100%). washed successively with icewater (1×700 cc), cold 3N HCl (1×700 cc), saturated NaHCO3 solution (1×700 cc) and brine (1×700 cc) The organic solution was dried (Na2SO4) concentrated in vacuo to an orange syrup