2-propan-2-ylphenol

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 2-Isopropylphenol was reacted with methyl iodide in the presence of potassium carbonate to yield 1-isopropyl-2-methoxybenzene, which in turn was reacted with the solution of unisolated intermediate (CF3CO2)3 I described above to form the bis-[3-isopropyl-4-methoxyphenyl] iodonium salt in 40-70% yield. The bis-[3-isopropyl-4-methoxyphenyl] iodonium salt precipitated as a gummy solid, making purification impracticable and contributing to the unpredictability of the yield.

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A 22 L three-necked round bottom flask equipped with mechanical stirring was charged with KOH (1154 g, 20.56 moles), tetrabutylammonium hydrogen sulfate (140 g, 0.411 mole), and deionized water (5.6 L). The mixture was cooled to a temperature of approximately 20° C. to 25° C. Methylene chloride (5.6 L) was added to the flask, then 2-isopropylphenol (590 g, 4.33 moles). The mixture was stirred for 0.5 h before iodomethane (741 g, 5.22 moles) was added. The stirring was continued at room temperature until the reaction was observed to be complete by HPLC, typically after approximately 5 h. Stirring was discontinued and the reaction mixture was allowed to settle into aqueous and organic layers, which were then separated. Triethylamine (185 mL, 1.33 moles) was added to the organic phase with stirring for at least 15 min. Solvent was then removed by vacuum distillation to afford a white solid. Cyclohexane (41) was added to the white solid, which was filtered and washed with further cyclohexane to remove the reaction product as a solvate. The cyclohexane solution was washed with aqueous HCl (2N), then half-saturated aqueous NaCl, and finally saturated aqueous NaCl. The cyclohexane was removed by vacuum distillation to afford 1-isopropyl-2-methoxybenzene as a light yellow oil of medium viscosity (612 g, 94% yield). A 22 L three-necked round bottom flask equipped The mixture was cooled to a temperature of approximately 20° C. to 25° C was added was continued at room temperature until the reaction Stirring were then separated with stirring for at least 15 min Solvent was then removed by vacuum distillation to afford a white solid was filtered washed with further cyclohexane to remove the reaction product as a solvate The cyclohexane solution was washed with aqueous HCl (2N) The cyclohexane was removed by vacuum distillation

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture consisting of 24.0 g of o-isopropylphenol, 17.0 g of chloroacetone, 30 g of potassium carbonate, 1.0 g of potassium iodide and 150 ml of acetone was heated at reflux with stirring for 6 hr. The reaction mixture was concentrated under reduced pressure; the condensate was extracted with ethyl acetate; the ethyl acetate layer was washed consecutively with 5% aqueous solution of sodium hydroxide, water and saturated saline, and thereafter dried with anhydrous sodium sulfate. The solvent was thereafter distilled off under reduced pressure and yielded 38 g of 2-isopropylphenoxyacetone. was heated at reflux The reaction mixture was concentrated under reduced pressure the condensate was extracted with ethyl acetate the ethyl acetate layer was washed consecutively with 5% aqueous solution of sodium hydroxide, water and saturated saline dried with anhydrous sodium sulfate The solvent was thereafter distilled off under reduced pressure