Synthesis of <i>P</i>-Substituted 5- and 6-Membered Benzo-Phostams: 2,3-Dihydro-1<i>H</i>-1,2-benzazaphosphole 2-Oxides and 2,3-Tetrahydro-1<i>H</i>-1,2-benzazaphosphinine 2-Oxides
作者:Axel Sabourin、Jeremy Dufour、Jean-Pierre Vors、David Bernier、Jean-Luc Montchamp
DOI:10.1021/acs.joc.1c01501
日期:2021.11.5
Several approaches were developed for the preparation of phosphorus-substituted 5- and 6-membered benzophostams. Carbodiimide-promoted cyclization of zwitterionic aminophosphinates derived from a nitrobenzene precursor accomplished the cyclization in good yields. Alternatively, a novel copper-catalyzed cross-coupling between a phosphonamide and a bromobenzene precursor produced the heterocycles in
开发了几种方法来制备磷取代的 5 和 6 元苯并磷酰胺。由硝基苯前体衍生的两性离子氨基次膦酸盐的碳二亚胺促进的环化以良好的产率完成了环化。或者,膦酰胺和溴苯前体之间的新型铜催化交叉偶联以中等至良好的产率产生杂环。比较了三种不同的方法来合成P-乙氧基取代的 5 元苯并磷酰胺。