反应详情

4-Nitro-3-piperidin-1-yl-phenylamine (64 mg, 0.28 mmol, as prepared in the previous step) and DIEA (122 μL, 0.700 mmol) in 4 mL of CH2Cl2 was treated with acetyl chloride (28 μL, 0.40 mmol). The reaction was stirred for 1 h, diluted with CH2Cl2 (25 mL), washed with water (50 mL), and dried (Na2SO4). Concentration of the solvent in vacuo afforded 51 mg (78%) of N-(4-nitro-3-piperidin-1-yl-phenyl)-acetamide. Using a procedure similar to Example 3, step (c), 4-nitro-3-piperidin-1-yl-phenylamine (51 mg, 0.21 mmol) was stirred with 5% Pd—C (35 mg) under H2 to afford 40 mg (61%) of the title compound as a dark semi-solid. Mass spectrum (ESI, m/z): Calcd. for C13H19N3O, 234.1 (M+H), found 234.2.

1. washwashed with water (50 mL)
2. dry with materialdried (Na2SO4)