反应详情

In a round bottom flask was combined 2-(4-tert-Butyl-phenyl)-4-[4-(3-fluoro-4-nitro-benzyl)-piperazin-1-yl]-1H-benzoimidazole (0.197 g, 0.40 mMol), dimethyl sulfoxide (3 mL), and sodium azide (0.029 g, 0.44 mMol) and the mixture stirred overnight. Upon arrival the mixture was diluted with ethyl acetate (100 mL), washed with water (2×50 mL), washed with brine (50 mL), and the organics dried with magnesium sulfate and filtered. The organics were concentrated on a rotary evaporator to yield 190 mg (92% yield) of 4-[4-(3-Azido-4-nitro-benzyl)-piperazin-1-yl]-2-(4-tert-butyl-phenyl)-1H-benzoimidazole as a light yellow solid. 1H NMR (DMSO-d6): δ=12.69 (s, 1H), 8.04 (d, 2H, J=8.7 Hz), 8.01 (d, 1H, J=8.3 Hz), 7.57 (m, 1H), 7.54 (d, 2H, J=8.6 Hz), 7.39 (dd, 1H, J=8.5, 1.2 Hz), 7.03 (m, 2H), 6.50 (dd, 1H, J=5.5, 1.4 Hz), 3.70 (s, 2H), 3.60 (br s, 4H), 2.68 (br s, 4H), 1.33 (s, 9H). LC/MS (Method A), rt=1.41 mins., purity=89.8%, calculated mass=510, [M+H]+=511, [M−H]−=509.

1. customIn a round bottom flask was combined
2. washwashed with water (2×50 mL)
3. washwashed with brine (50 mL)
4. dry with materialthe organics dried with magnesium sulfate
5. filtrationfiltered
6. concentrationThe organics were concentrated on a rotary evaporator