Trifluoroacetic acid → 1-[2-(4-Aminopiperidin-1-yl)ethyl]-7-methoxyquinoxalin-2(1H)-one

Participants

Reaction Steps

To 70 mL of a chloroform solution containing 9.53 g of tert-butyl(1-(2-(7-methoxy-2-oxoquinoxalin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate, 20 mL of trifluoroacetic acid was added, and the mixture was stirred at room temperature for 10 hours. The solvent was removed under reduced pressure, the reaction mixture was alkalified with an aqueous saturated sodium hydrogen carbonate solution, and then the solvent was removed under reduced pressure. The residue thus obtained was purified by silica gel column chromatography [silica gel; Chromatorex-NH, manufactured by Fuji Silysia Chemical Ltd., eluent; chloroform:methanol=50:1] to obtain 5.97 g of a brown oily substance, 1-(2-(4-aminopiperidin-1-yl)ethyl)-7-methoxyquinoxalin-2(1H)-one.

Provenance & Evidence