作者:Hendrik F. T. Klare、Alexander F. G. Goldberg、Douglas C. Duquette、Brian M. Stoltz
DOI:10.1021/acs.orglett.6b03789
日期:2017.3.3
An oxidative sequence for the conversion of oxindoles to structurally distinct heterocyclic scaffolds and aniline derivatives is disclosed by the combination of a copper-catalyzed C–H peroxidation and subsequent base-mediated fragmentation reaction. In contrast to classic enzymatic (i.e., kynurenine pathway) and biomimetic methods (i.e., Witkop–Winterfeldt oxidation) for oxidative indole cleavage,
通过铜催化的CHH过氧化和随后的碱介导的裂解反应的组合,揭示了将羟吲哚转化为结构上不同的杂环骨架和苯胺衍生物的氧化顺序。与经典的酶促方法(即犬尿氨酸途径)和仿生方法(即Witkop–Winterfeldt氧化法)进行氧化吲哚裂解不同,该方案允许引入外部亲核试剂。新的转化显示出广泛的官能团耐受性,适用于色氨酸衍生物,为多肽的后合成修饰,生物缀合和非天然氨基酸合成开辟了潜在的新途径。