Synthesis of 3-Benzazepines by Metal-Free Oxidative C-H Bond Functionalization-Ring Expansion Tandem Reaction
作者:Andrea Gini、Julia Bamberger、Javier Luis-Barrera、Mercedes Zurro、Rubén Mas-Ballesté、José Alemán、Olga García Mancheño
DOI:10.1002/adsc.201600985
日期:2016.12.22
A metal‐free synthesis of biologically important benzazepines is achieved through a single synthetic operation involving an oxidative C–H bond functionalization and ring expansion with diazomethanes as key reagent. This represents a new, strong methodology for the straightforward construction of the seven‐ring N‐heterocyclic structures under mild conditions using a 2,2,6,6‐tetramethylpiperidine 1‐oxyl
生物学上重要的苯并ze庚因的无金属合成是通过一个单一的合成操作完成的,该操作涉及氧化C–H键功能化和以重氮甲烷为关键试剂的环扩环。这代表了一种新的强大方法学,该方法可在2,2,6,6-四甲基哌啶1-氧基(TEMPO)氧铵盐作为氧化剂的温和条件下直接构建七环N-杂环结构。简单易得的四氢异喹啉可实现中等至良好的收率,该方法已进一步成功地用于合成3-苯并ze庚因药物Lorcaserin。扩环步骤可能的机械途径,包括在协调的异步过程中挤出氮气,