反应详情

To a solution of methyl-(4-nitro-3-piperidin-1-yl-phenyl)-amine (80 mg, 0.34 mmol, as prepared in the previous step) and triethylamine (118 μL, 0.850 mmol)) in 4 mL of CH2Cl2 was added acetic anhydride (320 μL, 3.40 mmol) via microsyringe and the reaction was allowed to stir overnight. At this time it was diluted with CHCl3 (50 mL), washed with satd aq NaHCO3 (2×50 mL), and dried (Na2SO4). Concentration of the solvent in vacuo and purification of the crude material using preparative TLC (4% MeOH—CHCl3) afforded 67 mg (71%) of the title compound as an oil. Mass spectrum (ESI, m/z): Calcd. for C14H19N3O3, 278.1 (M+H), found 278.1.

1. washwashed with satd aq NaHCO3 (2×50 mL)
2. dry with materialdried (Na2SO4)
3. customConcentration of the solvent in vacuo and purification of the crude material