反应详情

Sodium (64 mg) was dissolved in ethanol (10 ml) and 3'-hydroxy-3-biphenylcarboxylic acid (0.5 g) was added thereto. The mixture was stirred at room temperature for 20 minutes, and then conc. sulfuric acid (1 drop) and desyl bromide (642 mg) was added thereto. The resulting mixture was stirred under reflux for 3 hours, cooled to room temperature, and partitioned between water and ethyl acetate. The organic layer was washed successively with water (twice), 1N hydrochloric acid, sodium bicarbonate aqueous solution, and brine, dried over magnesium sulfate, and evaporated in vacuo. The residue was chromatographed (n-hexane--ethyl acetate) over silica gel to afford 2-oxo-1,2-diphenylethyl 3'-hydroxy-3-biphenylcarboxylate (744 mg) as a paste.

1. stirringThe resulting mixture was stirred
2. temperatureunder reflux for 3 hours
3. temperaturecooled to room temperature
4. custompartitioned between water and ethyl acetate
5. washThe organic layer was washed successively with water (twice), 1N hydrochloric acid, sodium bicarbonate aqueous solution, and brine
6. dry with materialdried over magnesium sulfate
7. customevaporated in vacuo
8. customThe residue was chromatographed (n-hexane--ethyl acetate) over silica gel