反应详情

A mixture of 2-chloro-3-nitro-5-(trifluoromethyl)pyridine (500 mg, 2.21 mmol), (2-(methylthio)benzo[d]thiazol-6-yl)methanamine from Step 4 of Example 23 (583 mg, 2.76 mmol), and triethylamine (837 mg, 8.29 mmol) in DMF (10 mL) was stirred at rt overnight. The reaction mixture was diluted with EtOAc and washed with water. The organic layer was dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by silica gel chromatography eluting with 1:0 to 10:1 petroleum ether/EtOAc to give N-((2-(methylthio)benzo[d]thiazol-6-yl)methyl)-3-nitro-5-(trifluoromethyl)pyridin-2-amine as a yellow solid (150 mg, 84.7%). 1H NMR (300 MHz, DMSO-d6) δ 9.46 (t, J=1.8 Hz, 1H), 8.78 (d, J=2.1 Hz, 1H), 8.66 (d, J=2.4 Hz, 1H), 7.97 (s, 1H), 7.78 (d, J=8.4 Hz, 1H), 7.49-7.45 (m, 1H), 4.95 (d, J=6.6 Hz, 2H), 2.77 (s, 3H); LCMS (ESI) m/z 401 (M+H)+.

1. washwashed with water
2. dry with materialThe organic layer was dried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by silica gel chromatography
6. washeluting with 1:0 to 10:1 petroleum ether/EtOAc