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6-bromo-2-(6-methylpyridin-2-yl)-2H-indazole[ No CAS ]
6-bromo-1-(6-ethylpyridin-2-yl)-1H-indazole[ No CAS ]
Yield
Reaction Conditions
Operation in experiment
19%; 26%
The preparation of 6-bromo-l-(6-ethylpyridin-2-yl)-lH-indazole was the same as that of 6-bromo-l-(6-methylpyridin-2-yl)-lH-indazole. The mixture of 6-bromo-l-(6- ethylpyridin-2-yl)-lH-indazole and 6-bromo-2-(6-ethylpyridin-2-yl)-2H-indazole was purified by pre-TLC (PE/EA = 10/1) to give 41-02-0002 and 6-bromo-2-(6-ethylpyridin-2- yl)-2H-indazole. Rf value of 6-bromo-l-(6-ethylpyridin-2-yl)-lH-indazole is more than that of 6-bromo-2-(6-ethylpyridin-2-yl)-2H-indazole. 6-bromo-l-(6-ethylpyridin-2-yl)-lH-indazole, 230 mg, as a yellow solid, Y: 26percent. ESI-MS (M+H)+: 302.0, 304.0. 6-bromo-2-(6-ethylpyridin-2-yl)-2H-indazole, 170 mg, as a yellow solid, Y: 19percent. ESI-MS (M+H)+: 302.0, 304.0.