methyl 2-(2,2,2-trifluoroethoxy)benzoate

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: Methyl 2-(2,2,2-trifluoroethoxy)benzoate (1.22 g. 5.2 mmole), ethanol (15 ml.) and 5 ml. of 95 per cent hydrazine (4.75 g., 158 mmole) are refluxed for two hours, cooled, diluted with water (100 ml.) and cooled. The white solid product, 2-(2,2,2-trifluoroethoxy)benzoic acid hydrazide is recrystallized from ethanol, m.p. 102°-104°. cooled cooled The white solid product, 2-(2,2,2-trifluoroethoxy)benzoic acid hydrazide is recrystallized from ethanol, m.p. 102°-104°

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

実験手順: Methyl 2-(2,2,2-trifluoroethoxy)benzoate (8 g., 34.2 mmoles) potassium hydroxide (3.3 g., 350 mmoles), water (50 ml.) and alcohol (25 ml.) are heated together under reflux for 1.5 hours, and distilled until ca. 25 ml. of distillate is removed. The cooled residue is acidified (pH 3) and the resulting white solid is collected and recrystallized (aqueous alcohol) to give fluffy white solid, m.p. 85°-86.5° C. under reflux for 1.5 hours distilled until ca. 25 ml of distillate is removed the resulting white solid is collected recrystallized (aqueous alcohol) to give fluffy white solid, m.p. 85°-86.5° C.

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

実験手順: A mixture of methyl salicylate (6.4 ml., 7.6 g., 0.05 mole), 2,2,2-trifluoroethyl trifluoromethanesulfonate (13.9 g., 0.06 mole), anhydrous potassium carbonate (13.8 g., 0.1 mole) and acetone (150 ml.) is heated under reflux with efficient stirring for three days. The product is filtered and the filtrate is concentrated to a small volume. It is diluted with cold water and the resulting precipitate is collected and washed successively with cold dilute sodium hydroxide solution and water. The desired material is recrystallized then from aqueous ethanol to afford white solid, m.p. 61-62. is heated under reflux The product is filtered the filtrate is concentrated to a small volume It is diluted with cold water the resulting precipitate is collected washed successively with cold dilute sodium hydroxide solution and water The desired material is recrystallized from aqueous ethanol to afford white solid, m.p. 61-62