Base catalysed rearrangements involving ylide intermediates. Part 12. The preparation and reactions of 2-oxidoanilinium ylides
作者:W. David Ollis、Ian O. Sutherland、Yodhathai Thebtaranonth
DOI:10.1039/p19810001981
日期:——
2-Oxidoanilinium ylides (22) may be prepared from the corresponding quaternary salts (21) by reaction with aqueous sodium hydroxide. The ylides (22) rearrange on heating to give the products (23) of [1,4] rearrangements which, on the basis of mixing experiments, are intramolecular processes. The N-allyl ylide (22c) rearranges to give both the ether (23c) and the allylphenol (30); a study of the rearrangements
可以通过与氢氧化钠水溶液反应,由相应的季盐(21)制备2-氧代苯胺基鎓盐(22)。加热后,叶酸(22)重排,得到[1,4]重排的产物(23),在混合实验的基础上,这是分子内过程。所述Ñ烯丙基叶立德(22℃)重排,得到两个醚(23℃)和烯丙基苯酚(30); 专门对氘代重金属的重排进行的研究(41)表明,这些反应涉及竞争性的协同和自由基对过程。烯丙基苯酚(30)形成过程中对CIDNP的观察表明与该产物形成的次要自由基对途径有关。