<i>O</i>-Cyclopropyl hydroxylamines: gram-scale synthesis and utility as precursors for N-heterocycles
作者:Kaitlyn Lovato、Urmibhusan Bhakta、Yi Pin Ng、László Kürti
DOI:10.1039/d0ob00611d
日期:——
O-Cyclopropyl hydroxylamines, now accessible via a novel and scalable synthetic route, have been demonstrated to be bench-stable and practical precursors for the synthesis of N-heterocycles via a di-heteroatom [3,3]-sigmatropic rearrangement. In order to study the reactivity of these compounds in depth, a robust synthesis of both ring-substituted and ring-unsubstituted O-cyclopropyl hydroxylamines has
O-环丙基羟胺,现在可以通过新颖且可扩展的合成途径获得,已证明是通过二杂原子[3,3]-σ重排合成N-杂环的替补稳定且实用的前体。为了深入研究这些化合物的反应性,已经开发了环取代和环未取代的O-环丙基羟胺的稳健合成。还确定了这些前体易于N-芳基化的无金属条件。发现N-芳基化的O-环丙基异羟肟酸酯可以在碱介导的条件下有效地经历一锅[3,3]-σ重排/环化/芳构化级联反应,以提供一组结构多样的取代四氢喹啉。