4-iodo-2,6-dimethoxyphenol

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

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

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of 2,6-dimethoxy-4-iodophenol (1.0 g) and potassium carbonate (938 mg) in DMF (10 mL) was added isopropyl iodide (507 □L). The mixture was stirred at 60° C. for 3 hours and evaporated. Ethyl acetate and water were added to the residue, the organic layer was separated, washed with brine, dried over anhydrous sodium sulfate and evaporated. The residue was applied to a column of silica gel using hexane-ethyl acetate (5:1) as an eluent to give the title compound. evaporated Ethyl acetate and water were added to the residue the organic layer was separated washed with brine dried over anhydrous sodium sulfate evaporated

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 5-iodo-1,2,3-trimethoxybenzene (3.2 g) in 1,2-dichloroethane (40 mL) was added aluminum chloride (1.6 g). The mixture was stirred at 60° C. for 4 hours and evaporated. The residue was dissolved in 1 M aqueous sodium hydroxide solution and washed with ether. The aqueous layer was then acidified and extracted with chloroform. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and evaporated to give the title compound as white crystalline powder. evaporated The residue was dissolved in 1 M aqueous sodium hydroxide solution washed with ether extracted with chloroform The organic layer was washed with brine dried over anhydrous magnesium sulfate evaporated

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 25.0 g (89.3 mmol) of 4-hydroxy-1-iodo-3,5-dimethoxybenzene in dimethylformamide (125 mL) were added 26.7 mL (267 mmol) of isopropyl iodide and 4.7 g (108 mmol) of a 55 wt. % sodium hydride dispersion in mineral oil. The reaction mixture was stirred at 50° C. for 2.5 hours. With ice cooling, water (125 mL) was added and the mixture was extracted with toluene-hexane (2:1). The organic layers were combined, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel to yield crude crystals. The crude crystals were recrystallized from methanol, whereby 24.0 g of 1-iodo-4-isopropoxy-3,5-dimethoxybenzene was obtained as a colorless crystalline powder (mp: 56.0 to 57.0° C., yield: 83%). the mixture was extracted with toluene-hexane (2:1) dried over anhydrous sodium sulfate concentrated under reduced pressure The residue was purified by column chromatography on silica gel to yield crude crystals The crude crystals were recrystallized from methanol

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 25.0 g (89.3 mmol) of 4-hydroxy-1-iodo-3,5-dimethoxybenzene in dimethylformamide (125 mL) were added 26.7 mL (267 mmol) of isopropyl iodide and 4.7 g (108 mmol) of a 55 wt. % sodium hydride dispersion in mineral oil. The reaction mixture was stirred at 50° C. for 2.5 hours. With ice cooling, water (125 mL) was added and the mixture was extracted with toluene-hexane (2:1). The organic layers were combined, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel to yield crude crystals. The crude crystals were recrystallized from methanol, whereby 24.0 g of 1-iodo-4-isopropoxy-3,5-dimethoxybenzene was obtained as a colorless crystalline powder (mp: 56.0 to 57.0° C., yield: 83%). the mixture was extracted with toluene-hexane (2:1) dried over anhydrous sodium sulfate concentrated under reduced pressure The residue was purified by column chromatography on silica gel to yield crude crystals The crude crystals were recrystallized from methanol

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 50.0 g of (0.170 mmol) of 1-iodo-3,4,5-trimethoxybenzene in methylene chloride (500 mL) was added 24.96 g (0.187 mmol) of aluminum chloride. The mixture was stirred at 60° C. for 6 hours. After cooling in an ice bath, ice (200 mL) and water (300 mL) were added and the resulting mixture was stirred. The reaction mixture was filtered through Celite and the aqueous layer of the filtrate was extracted with chloroform. The organic layers were combined, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by chromatography on silica gel to yield crude crystals. The crude crystals were recrystallized from toluene-hexane, whereby 33.17 g of 4-hydroxy-l-iodo-3,5-dimethoxybenzene was obtained as a colorless crystalline powder (mp: 73.0 to 75.0° C., yield: 70%). After cooling in an ice bath the resulting mixture was stirred The reaction mixture was filtered through Celite the aqueous layer of the filtrate was extracted with chloroform dried over anhydrous sodium sulfate concentrated under reduced pressure The residue was purified by chromatography on silica gel to yield crude crystals The crude crystals were recrystallized from toluene-hexane

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of 2,6-dimethoxy-4-iodophenol (1.0 g) and potassium carbonate (938 mg) in DMF (10 mL) was added isopropyl iodide (507 mL). The mixture was stirred at 60° C. for 3 hours and evaporated. Ethyl acetate and water were added to the residue, the organic layer was separated, washed with brine, dried over anhydrous sodium sulfate and evaporated. The residue was applied to a column of silica gel using hexane-ethyl acetate (5:1) as an eluent to give the title compound. evaporated Ethyl acetate and water were added to the residue the organic layer was separated washed with brine dried over anhydrous sodium sulfate evaporated

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 5-iodo-1,2,3-trimethoxybenzene (3.2 g) in 1,2-dichloroethane (40 mL) was added aluminum chloride (1.6 g). The mixture was stirred at 60° C. for 4 hours and evaporated. The residue was dissolved in 1 M aqueous sodium hydroxide solution and washed with ether. The aqueous layer was then acidified and extracted with chloroform. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and evaporated to give the title compound as white crystalline powder. evaporated The residue was dissolved in 1 M aqueous sodium hydroxide solution washed with ether extracted with chloroform The organic layer was washed with brine dried over anhydrous magnesium sulfate evaporated

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of 2,6-dimethoxy-4-iodophenol (1.0 g) and potassium carbonate (938 mg) in DMF (10 mL) was added isopropyl iodide (507 □L). The mixture was stirred at 60° C. for 3 hours and evaporated. Ethyl acetate and water were added to the residue, the organic layer was separated, washed with brine, dried over anhydrous sodium sulfate and evaporated. The residue was applied to a column of silica gel using hexane-ethyl acetate (5:1) as an eluent to give the title compound. evaporated Ethyl acetate and water were added to the residue the organic layer was separated washed with brine dried over anhydrous sodium sulfate evaporated

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 5-iodo-1,2,3-trimethoxybenzene (3.2 g) in 1,2-dichloroethane (40 mL) was added aluminum chloride (1.6 g). The mixture was stirred at 60° C. for 4 hours and evaporated. The residue was dissolved in 1 M aqueous sodium hydroxide solution and washed with ether. The aqueous layer was then acidified and extracted with chloroform. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and evaporated to give the title compound as white crystalline powder. evaporated The residue was dissolved in 1 M aqueous sodium hydroxide solution washed with ether extracted with chloroform The organic layer was washed with brine dried over anhydrous magnesium sulfate evaporated

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 5-iodo-1,2,3-trimethoxybenzene (3.2 g) in 1,2-dichloroethane (40 mL) was added aluminum chloride (1.6 g). The mixture was stirred at 60° C. for 4 hours and evaporated. The residue was dissolved in 1 M aqueous sodium hydroxide solution and washed with ether. The aqueous layer was then acidified and extracted with chloroform. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and evaporated to give the title compound as white crystalline powder. evaporated The residue was dissolved in 1 M aqueous sodium hydroxide solution washed with ether extracted with chloroform The organic layer was washed with brine dried over anhydrous magnesium sulfate evaporated