反应详情

5-(4-Bromophenyl)-2,2-dimethyl-1,3-dioxolan-4-one (15 g; 55 mmol) is dissolved in 50 ml of methanol. 4-(2-Aminoethyl)-2-methoxyphenol hydrochloride (14 g; 69 mmol) and triethylamine (7 g; 69 mmol) are added and the mixture is stirred for 72 hours at room temperature. The solvent is removed in vacuum and the residue is extracted with ethyl acetate and the combined organic phases are washed with brine, dried over sodium sulfate and evaporated to dryness. The remaining 2-(4-bromophenyl)-2-hydroxy-N-[2-(4-hydroxy-3-methoxyphenyl)-ethyl]-acetamide is purified by chromatography on silica gel.

1. customThe solvent is removed in vacuum
2. extractionthe residue is extracted with ethyl acetate
3. washthe combined organic phases are washed with brine
4. dry with materialdried over sodium sulfate
5. customevaporated to dryness
6. customThe remaining 2-(4-bromophenyl)-2-hydroxy-N-[2-(4-hydroxy-3-methoxyphenyl)-ethyl]-acetamide is purified by chromatography on silica gel