Sodium Bicarbonate → tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(7-methyl-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate

Participants

Reaction Steps

To 8.0 mL of dichloromethane solution containing 0.16 g of (7-methyl-2-oxoquinolin-1(2H)-yl)acetaldehyde, 0.28 g of tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(piperidin-4-yl)carbamate and 80 μL of acetic acid were added, stirred at room temperature for 15 min, then, 0.25 g of sodium triacetoxyborohydride was added, and stirred at room temperature for 1 hour. To the reaction mixture, aqueous saturated sodium hydrogen carbonate solution, water and chloroform were added. The organic layer was separated, and the aqueous layer was extracted with chloroform. The organic layer and extracts were combined, 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; hexane:ethyl acetate=1:3], to give 0.26 g of tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(7-methyl-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate as a brown oil.

Provenance & Evidence