approach to medicinally relevant pyrroloindolones and related fused heterocycles is reported via the diastereoselective N-addition of unprotected indoles to readily accessible cyclopropanone equivalents. The resulting stable hemiaminals are shown to smoothly rearrange to pyrroloindolones in mild conditions using Fe(III) catalysis in the presence of inexpensive ammonium persulfate as a stoichiometric oxidant
通过将未保护的
吲哚非对映选择性N加成到容易获得的环
丙酮等价物上,报道了一种医药相关
吡咯并
吲哚酮和相关稠合杂环的简明合成方法。结果表明,在廉价的过
硫酸铵作为
化学计量氧化剂存在下,使用 Fe(III) 催化,所得稳定的
半缩醛胺可在温和条件下顺利重排为
吡咯并
吲哚酮。实验证据表明,易于环化和氧化重芳构化的β-羧基中间体的形成是有效的机制途径。