反应详情

To 0.378 g (1.58 mmol) of the above nitro compound in DMF (6 mL) at 0° C. was added 0.067 g (2.80 mmol) of sodium hydride. After 20 min, 0.12 mL (1.93 mmol) of methyl iodide was added, and the mixture was stirred for 2 hrs. Water was added, and the mixture was extracted with EtOAc (×4). The combined organic layer was washed successively with 1M HCl, sat. NaHCO3 solution, and brine, dried (Na2SO4), and concentrated, to give 0.40 g (99% yield) of tert-butyl methyl(5-nitro-2-pyridinyl)carbamate: 1H NMR (CDCl3) δ9.19 (d, J=2.7 Hz, 1H), 8.36 (dd, J=9.4, 2.7 Hz, 1H), 8.14 (dd, J=9.4, 0.3 Hz, 1H), 3.50 (s, 3H), 1.57 (s, 9H); LCMS (APCI−) m/z: 253 (MH+, 100%).

1. extractionthe mixture was extracted with EtOAc (×4)
2. washThe combined organic layer was washed successively with 1M HCl, sat. NaHCO3 solution, and brine
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated