反应详情

A mixture of 2-[2-[(3-hydroxyphenyl)methyl]-cyclohexyl]-4,5-diphenyloxazole (320 mg), ethyl bromoacetate (0.13 ml), and potassium carbonate (270 mg) in acetonitrile (3.0 ml) was stirred at room temperature overnight and a mixture of ethyl acetate and water was added thereto. The organic layer was separated, washed with water (twice) and brine, dried over magnesium sulfate, and evaporated in vacuo. The oily residue was chromatographed over silica gel using n-hexane--ethyl acetate as an eluent. The first eluate gave cis- or trans-1-[(3-ethoxycarbonylmethoxyphenyl)methyl]-2-(4,5-diphenyloxazol-2-yl)cyclohexane (isomer A) (79 mg) as a powder.

1. additionwas added
2. customThe organic layer was separated
3. washwashed with water (twice) and brine
4. dry with materialdried over magnesium sulfate
5. customevaporated in vacuo
6. customThe oily residue was chromatographed over silica gel