作者:Dong Wang、Yuxi Wang、Junjie Zhao、Linna Li、Longfei Miao、Dong Wang、Hua Sun、Peng Yu
DOI:10.1016/j.tet.2016.07.083
日期:2016.9
practical method for the regioselective halogenation of fused heterocyclic N-oxides has been developed. It employs Vilsmeier reagent, generated in situ by POX3 and DMF, as both the activating agent and the nucleophilic halide source. The method is amenable across a broad range of substrates, including quinolines, isoquinolines and the diazine N-oxides, possessing a variety of substitution patterns. Furthermore
已经开发了新颖,简单和实用的方法用于稠合杂环N-氧化物的区域选择性卤化。它使用POX 3和DMF原位生成的Vilsmeier试剂作为活化剂和亲核卤化物源。该方法适用于具有多种取代模式的多种底物,包括喹啉,异喹啉和二嗪N-氧化物。此外,所有相关试剂便宜且易于获得。还提出了该方法到一锅法氧化/卤化序列的潜在扩展,从而消除了分离N-氧化物中间体的需要。