A new Grignard reagent-mediated synthesis of ferrocene-based phenanthridines from oximes was developed. The tertiary magnesium-zinc nitrenoid was proposed as the key intermediate, which underwent ring-expansion/rearrangement to form the pyridine skeleton.

中文翻译：

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来自肟的 Nitrenoid：通过氮烯参与的扩环反应实用合成平面手性二茂铁基菲啶

开发了一种新的格氏试剂介导的从肟合成二茂铁基菲啶的方法。叔镁-锌类硝氮化合物被认为是关键中间体，它经过扩环/重排形成吡啶骨架。