反应详情

A suspension of 8-(2,6-dichloro-3-carboxybenzyloxy)-2-methylquinoline (200 mg), 1-(tert-butoxycarbonyl)piperazine (109 mg), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (127 mg) and 1-hydroxybenzotriazole (104 mg) in N,N-dimethylformamide (2 ml) was stirred for 2 hours at ambient temperature. To the reaction mixture was added saturated sodium bicarbonate solution, and the mixture was extracted with ethyl acetate. The extract was washed with water and brine, dried over magnesium sulfate and evaporated in vacuo. The residue was purified by preparative thin layer chromatography (n-hexane-ethyl acetate) to give 8-[3-[4-(tert-butoxycarbonyl)piperazine-1-carbonyl]-2,6-dichlorobenzyloxy]-2-methylquinoline (270 mg) as colorless amorphous.

1. extractionthe mixture was extracted with ethyl acetate
2. washThe extract was washed with water and brine
3. dry with materialdried over magnesium sulfate
4. customevaporated in vacuo
5. customThe residue was purified by preparative thin layer chromatography (n-hexane-ethyl acetate)