by condensation of hydrazines with the corresponding ketones. In the presence of potassium iodide, I2-mediated oxidative cyclization of diaryl and tert-butyl aryl ketone hydrazones produced 1H-indazoles via direct aryl C–H amination. Under similar reaction conditions, primary and secondary alkyl ketone hydrazones were transformed into 1H-pyrazole products in a reaction involving sp3 C–H amination. This
molecular原子的分子内CH胺的发散已被开发出来,采用分子
碘(I 2)作为唯一氧化剂。通过
肼与相应的酮的缩合可以容易地获得所需的底物。在
碘化钾存在下,二芳基和叔丁基芳基酮aryl的I 2介导的氧化环化反应通过直接芳基CH胺化反应生成1 H-
吲唑。在相似的反应条件下,伯和仲烷基酮在涉及sp 3的反应中转化为1 H-
吡唑产物。C–H胺化。这种合成方法不涉及过渡
金属,并且操作简单,可以高效,可扩展地轻松获得
吲唑和
吡唑衍
生物。