反应详情

温度

5 °C

To a mixture of 4-(benzyloxy)-N-((2-(methylthio)benzo[d]thiazol-6-yl)methyl)-2-nitroaniline (2.8 g, 6.42 mmol) from the previous step, HOAc (7.5 mL), MeOH (7.5 mL) and DCM (50 mL) at 0° C. was added portionwise zinc dust (4.25 g, 65.4 mmol). The reaction mixture was stirred at 5° C. for 1 h. The mixture was filtered and the filtrate was diluted with DCM and washed sequentially with water and saturated aq NaHCO3. The organic layer was separated, dried over Na2SO4, filtered, and concentrated under reduced pressure to afford 4-(benzyloxy)-N1-((2-(methylthio)benzo[d]thiazol-6-yl)methyl)benzene-1,2-diamine (2.49 g, 95%) as a light orange solid which was not purified further. 1H NMR (300 MHz, CDCl3) δ 7.83 (d, J=8.4 Hz, 1H), 7.77 (s, 1H), 7.26-7.44 (m, 7H), 6.59 (d, J=8.4 Hz, 1H), 6.46 (s, 1H), 6.38 (m, 1H), 4.97 (s, 2H), 4.34 (s, 2H), 3.54 (br s, 2H), 2.80 (s, 3H). LCMS (ESI) m/z 408 (M+H)+.

1. filtrationThe mixture was filtered
2. additionthe filtrate was diluted with DCM
3. washwashed sequentially with water and saturated aq NaHCO3
4. customThe organic layer was separated
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure