2,6-dimethoxyphenol

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: 2,6-Dibromophenol (14.5 g, 0.058 mole) was treated with sodium methoxide (from 10.3 g sodium, 0.45 g atom) in methanol (100 ml) and dimethylformamide (100 ml) in the presence of cuprous iodide (2 g) in the same way as described in detail for 2,6-dibromo-4-t-butylphenol in Example 9. The crude yield of title product was 5.4 g (60%), m.p. 53°-6° C. (literature gives 55°-6° C.). The lower yield may be explained by incomplete extraction, 2,6-dimethoxyphenol being to some extent water soluble.

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

Procedure: The product of Example 3 was added to 48% aqueous hydrobromic acid (400 parts) and the mixture boiled under reflux in an atmosphere of nitrogen for one hour. The hydrobromic acid was then evaporated off under reduced pressure to leave crude pyrogallol (40 parts, 90% yield), melting point 124°-130° C., the structure of which was confirmed by its nuclear magnetic resonance spectrum. under reflux in an atmosphere of nitrogen for one hour The hydrobromic acid was then evaporated off under reduced pressure

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

Procedure: The process of claim 1, said process comprising reacting 2,6-dimethoxyphenol with 1,1-dimethyl-1-heptanol in the presence of methanesulfonic acid to provide 1-hydroxy-2,6-dimethoxy-4-(1,1-dimethylheptyl)benzene; reacting said 1-hydroxy-2,6-dimethoxy-4-(1,1-dimethylheptyl)benzene with a halogenated disubstituted phosphite to provide a 2,6-dimethoxy-4-(1,1-dimethylheptyl)phenyl disubstituted phosphate; reacting said 2,6-dimethoxy-4-(1,1-dimethylheptyl)phenyl disubstituted phosphate with an alkali metal to afford 1-(1,1-dimethylheptyl)-3,5-dimethoxybenzene; reacting said 1-(1,1-dimethylheptyl)-3,5-dimethoxybenzene with boron tribromide to provide 5-(1,1-dimethylheptyl)-resorcinol, and recovering said 5-(1,1-dimethylheptyl)-resorcinol therefrom.

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

Procedure: 16.7 g of mercaptobenzothiazole, 3.0 g of paraformaldehyde, 15.4 g of 2,6-dimethoxyphenol and 1 g dibutylamine are heated at 110°, with rapid stirring, for 2 hours. 50 ml of ethanol are added and the mixture cooled to 10° thereby obtaining 27.3 g of 3-(3,5-dimethoxy-4-hydroxybenzyl)-benzothiazole-2-thione (compound No. 8) melting at 141°-142°. the mixture cooled to 10°

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

Procedure: To a yellow solution of 38.5 g 2,6-dimethoxy phenol (0.25 mol) and 83.1 g methanesulfonic acid 1-ethyl-propyl ester (0.50 mol) in 500 ml dimethylsulfoxide was added under stirring at 50° C. a solution of 56,1 g potassium tert-butylate (0.50 mol) in 500 ml dimethylsulfoxide over 4 h. After additional 2.8 g potassium tert-butylate (0.025 mol) were added, stirring at 50° C. was continued for lh. The reaction mixture was distributed between 500 ml ethyl acetate and 600 ml 1N HCl. The organic layer was washed twice with 250 ml, a total of 500 ml deionized water and the aqueous layers were extracted sequentially with 250 ml ethyl acetate. The combined organic layers were dried over ca. 25 Na2SO4, filtered and the solvent was evaporated by rotary evaporation (50° C./≧1 mbar) affording 56.2 g (100.2%) of the title product as an orange oil, which was used without purification in the next step (bp. 90° C./0.03 mbar). The organic layer was washed twice with 250 ml the aqueous layers were extracted sequentially with 250 ml ethyl acetate The combined organic layers were dried over ca. 25 Na2SO4 filtered the solvent was evaporated by rotary evaporation (50° C./≧1 mbar)

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

Procedure: A mixture of 6.0 g of 2,6-dimethoxyphenol, 6.8 g of ethylene carbonate and 5.4 g of potassium carbonate in 40 ml of toluene was refluxed for 17 hours. After cooling, toluene solution was separated, dried (Na2SO4) and solvent was evaporated. 7.77 g of desired compound was obtained. was refluxed for 17 hours After cooling toluene solution was separated dried (Na2SO4) and solvent was evaporated

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

Procedure: 4-[(6,7-Dimethoxy-4-quinolyl)oxy]-2,3-dimethylaniline (50 mg) was added to toluene (5 ml), and triethylamine (0.5 ml), and the mixture was heated under reflux to prepare a solution. A solution of triphosgene (68 mg) in methylene chloride was then added thereto, and the mixture was heated under reflux for 10 min. Next, 2,6-dimethoxyphenol (35 mg) was added thereto, and the mixture was further stirred with heating under reflux for 3 hr. A saturated aqueous sodium bicarbonate solution was added to stop the reaction, and the reaction solution was then extracted with chloroform, followed by washing with a 1 N aqueous hydrochloric acid solution, water, and saturated brine in that order. The extract was dried over sodium sulfate and was then concentrated. The residue was purified on a column using chloroform/methanol to give the title compound (74 mg, yield 91%). the mixture was heated under reflux to prepare a solution the mixture was heated under reflux for 10 min with heating under reflux for 3 hr the reaction the reaction solution was then extracted with chloroform by washing with a 1 N aqueous hydrochloric acid solution, water, and saturated brine in that order The extract was dried over sodium sulfate was then concentrated The residue was purified on a column

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

Procedure: 4-[(6,7-Dimethoxy-4-quinolyl)oxy]-2,5-dimethylaniline (50 mg) was added to toluene (5 ml), and triethylamine (0.5 ml), and the mixture was heated under reflux to prepare a solution. A solution of triphosgene (68 mg) in methylene chloride was then added thereto, and the mixture was heated under reflux for 10 min. Next, 2,6-dimethoxyphenol (35 mg) was added thereto, and the mixture was further stirred with heating under reflux for 3 hr. A saturated aqueous sodium bicarbonate solution was added to stop the reaction, and the reaction solution was then extracted with chloroform, followed by washing with a 1 N aqueous hydrochloric acid solution, water, and saturated brine in that order. The extract was dried over sodium sulfate and was then concentrated. The residue was purified on a column using chloroform/methanol to give the title compound (75 mg, yield 93%). the mixture was heated under reflux to prepare a solution the mixture was heated under reflux for 10 min with heating under reflux for 3 hr the reaction the reaction solution was then extracted with chloroform by washing with a 1 N aqueous hydrochloric acid solution, water, and saturated brine in that order The extract was dried over sodium sulfate was then concentrated The residue was purified on a column