反应详情

To 24 mL of dichloromethane suspension containing 0.8 g of methyl 2-oxo-1-(2-oxoethyl)-1,2-dihydroquinoline-4-carboxylate and 1.1 g of tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(piperidin-4-yl)carbamate, 0.24 mL of acetic acid was added, at room temperature and stirred at room temperature for 1 hour. To the reaction mixture, 1.0 g of sodium triacetoxyborohydride was added, and stirred at room temperature for 1 hour. Aqueous saturated sodium hydrogen carbonate solution was added, the organic layer was separated, and the aqueous layer was extracted with dichloromethane. The organic layer and extracts were combined, washed sequentially with water and 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 [eluent; ethyl acetate], to give 1.25 g of methyl 1-(2-(4-((tert-butoxycarbonyl)(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)amino)piperidin-1-yl)ethyl)-2-oxo-1,2-dihydroquinoline-4-carboxylate as a slight yellow oil.

1. additionwas added, at room temperature
2. stirringstirred at room temperature for 1 hour
3. customthe organic layer was separated
4. extractionthe aqueous layer was extracted with dichloromethane
5. washwashed sequentially with water and aqueous saturated sodium chloride solution
6. dry with materialdried over anhydrous magnesium sulfate
7. customthe solvent was removed under reduced pressure
8. customThe residue thus obtained
9. customwas purified by silica gel column chromatography [eluent; ethyl acetate]