反应详情

Add AlCl3 (8.31 g, 62.3 mmol) to carbon tetrachloride (65 mL) under a nitrogen atmosphere at room temperature. Add 4-chlorobutyryl chloride (03.5 mL, 31.2 mmol), stir for 15 minutes and add, by dropwise addition over 15 minutes, a solution of 2-methyl-2-phenyl-propionic acid, pyrrolidineamide (5.64 g, 26.0 mmol) in carbon tetrachloride (60 mL). Stir at room temperature for 17 hours, pour into ice water (100 mL) and separate the layers. Wash the aqueous layer with methylene chloride (2×70 mL), 5% aqueous sodium hydrogen carbonate, combine the organic layers and dry (Na2SO4). Filter, evaporate the filtrate in vacuo and purify by silica gel chromatography (5:2 hexane/ethyl acetate) to give the title compound (6.55 g, 78%) as a light yellow oil.

1. additionadd, by dropwise addition over 15 minutes
2. customseparate the layers
3. washWash the aqueous layer with methylene chloride (2×70 mL), 5% aqueous sodium hydrogen carbonate
4. dry with materialdry (Na2SO4)
5. filtrationFilter
6. customevaporate the filtrate in vacuo
7. custompurify by silica gel chromatography (5:2 hexane/ethyl acetate)