反应详情

温度

100 °C

A solution of 5-tert-butyl-4-chloro-2-methyl-2H-pyrazole-3-carboxylic acid [6-(2-chloro-phenyl)-2-methoxy-3-nitro-pyridin-4-yl]-amide (9.10 g, 32.6 mmol, prepared as described in the previous step above) in AcOH (50 mL) was treated with iron powder (6.80 g, 122 mmol) and heated to 100° C. for 3 h. The resulting mixture was cooled to room temperature and treated with EtOAc (100 mL). The resulting mixture was then filtered through a pad of diatomaceous earth and the filtrate was concentrated in vacuo. The residue was purified on silica (0:100-100:0 EtOAc/hexane) to yield a white solid. The solid obtained was dissolved in Et2O (200 mL) with heating and sonication. Hexanes (50 mL) were added and the resulting mixture was concentrated until a precipitate started to form. The solution was left at room temperature overnight and the solid formed was collected by suction filtration to yield 2-(5-tert-butyl-4-chloro-2-methyl-2H-pyrazol-3-yl)-6-(2-chloro-phenyl)-4-methoxy-3H-imidazo[4,5-c]pyridine. 1H-NMR (400 MHz, CD3OD) δ: 7.76-7.58 (m, 1H), 7.49 (m, 2H), 7.39 (m, 2H), 4.16 (s, 3H), 4.04 (s, 3H), 1.44 (s, 9H). Mass Spectrum (LCMS, ESI pos.) Calculated for C21H21N5OCl2: 430.1 (M+H), Measured: 430.2.

1. temperatureThe resulting mixture was cooled to room temperature
2. filtrationThe resulting mixture was then filtered through a pad of diatomaceous earth
3. concentrationthe filtrate was concentrated in vacuo
4. customThe residue was purified on silica (0:100-100:0 EtOAc/hexane)
5. customto yield a white solid
6. customThe solid obtained
7. temperaturewith heating
8. customsonication
9. concentrationthe resulting mixture was concentrated until a precipitate
10. customto form
11. customthe solid formed
12. filtrationwas collected by suction filtration