反应详情

To 3 mL of an N,N-dimethylformamide solution containing 166 mg of tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(5-hydroxy-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate, 65 mg of potassium carbonate and 43 μL of ethyl bromoacetate were added, and stirred at room temperature for 2 hours. After water was added to the reaction mixture and acidified with hydrochloric acid, the mixture was extracted with a mixture of ethyl acetate: toluene=5:1. The extracts were washed with aqueous saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The residue thus obtained was purified by silica gel column chromatography [Silica Gel; Kanto Chemical Co., Inc., Silica Gel 60, eluent; chloroform:methanol=20:1], to give 196 mg of ethyl (1-(2-(4-((tert-butoxycarbonyl)(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)amino)piperidin-1-yl)ethyl)-2-oxo-1,2-dihydroquinolin-5-yloxy)acetate as a pale brown oil.

1. additionwere added
2. extractionthe mixture was extracted with a mixture of ethyl acetate
3. washThe extracts were washed with aqueous saturated sodium chloride solution
4. dry with materialdried over anhydrous magnesium sulfate
5. customthe solvent was removed under reduced pressure
6. customThe residue thus obtained
7. customwas purified by silica gel column chromatography [Silica Gel; Kanto Chemical Co., Inc., Silica Gel 60, eluent; chloroform:methanol=20:1]