6-Nitroindoline → 1-(1-Methyl(4-piperidyl))-6-nitroindoline

Participants

Reaction Steps

6-Nitroindoline (5 g) was dissolved in 200 mL of dichloroethane, N-methyl-4-piperidone (5 g) was added to the mixture, followed by 12 g NaBH(OAc)3 and 1 mL of glacial AcOH. The mixture was stirred at RT overnight. Saturated NaHCO3 solution (200 mL) was added to the reaction mixture and stirred for 1 h. The resulting mixture was separated by separation funnel, the organic layer was extracted once with saturated NaHCO3 solution and once with brine. The resulting organic layer was dried over MgSO4, filtered and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 2:1 EtOAc:MeOH to afford an orange oil. MS:262 (M+1). Calc'd. for C14H19N3O2—261.32.

Provenance & Evidence