3,3-Sigmatropic Rearrangements Involving N−O Bond-Cleavage of Enehydroxylamine Derivatives
作者:Lucinda V. Reis、Ana M. Lobo、Sundaresan Prabhakar、Mariana P. Duarte
DOI:10.1002/1099-0690(200301)2003:1<190::aid-ejoc190>3.0.co;2-w
日期:2003.1
good to excellent yields, substances that in general undergo 3,3-sigmatropic rearrangements either spontaneously or upon heating. In those cases in which such reactions failed, addition of sodium hydride was found to induce the transformation. A study of the rearrangement by use of deuterium-labelled compounds showed that no crossover occurs, indicating the intramolecular nature of the process. The
衍生自碳环和杂环 1,3-二氧代化合物的烯羟胺与各种不饱和亲电试剂反应,以良好到极好的产率产生通常自发或加热时发生 3,3-σ 重排的物质。在这些反应失败的情况下,发现添加氢化钠会诱导转化。通过使用氘标记的化合物对重排进行的研究表明没有发生交叉,表明该过程的分子内性质。该方法提供了 2,3- 或 3,4- 二取代的环己烯酮、5,6- 二取代的巴比妥酸盐和相应的稠合吡咯和咪唑啉酮衍生物。(© Wiley-VCH Verlag GmbH & Co KGaA, 69451 Weinheim, Germany, 2003)