An Efficient and Versatile One-Pot Beckmann Rearrangement of Ketoximes Using Mesitylenesulfonyl Chloride
作者:Yong-Tae Park、Chennan Ramalingan
DOI:10.1055/s-2008-1042948
日期:2008.5
acyclic ketoximes in the presence of lithium hydroxide in tetrahydrofuran, efficiently rearrange into their corresponding lactams and amides. The stereo-chemistry of diazepan-5-one lactams resulting from the rearrangement of heterocyclic ketoximes (piperidin-4-one oximes), has been deduced based on one- and two-dimensional NMR analyses. The seven-membered heterocyclic ring of the product lactams adopts chair
在氢氧化锂的存在下,在四氢呋喃中,由杂环、碳环和无环酮肟原位生成的各种肟均三甲苯磺酸盐可有效地重排成相应的内酰胺和酰胺。由杂环酮肟(哌啶-4-酮肟)重排产生的二氮杂-5-酮内酰胺的立体化学已基于一维和二维核磁共振分析推导出来。产物内酰胺的七元杂环采用椅式构象,除具有轴向构型的 3,3-二取代产物 C-3 上的一个甲基外,所有烷基和芳基取代基均具有赤道构型。