Synthesis of 1,4-Enamino Ketones by [3,3]-Rearrangements of Dialkenylhydroxylamines
作者:Wiktoria H. Pecak、Jongwoo Son、Amy J. Burnstine、Laura L. Anderson
DOI:10.1021/ol501230e
日期:2014.7.3
4-enamino ketones has been achieved through the [3,3]-rearrangement of dialkenylhydroxylamines generated from the addition of N-alkenylnitrones to electron-deficient allenes. The mild conditions required for this reaction, and the simultaneous installation of a fluorenyl imine N-protecting group as a consequence of the rearrangement, avoid spontaneous cyclization of the 1,4-enamino ketones to form the
1,4-烯氨基酮的合成是通过将N-烯基硝酮加到缺电子的烯中而生成的二烯基羟胺的[3,3]重排而实现的。该反应所需的温和条件以及由于重排而同时安装的芴基亚胺N-保护基团,避免了1,4-烯氨基酮的自发环化反应形成相应的吡咯,并允许分离和控制这些反应性中间体的不同功能化。讨论了该新方法的优化,范围和耐受性,并证明了该产品可用于合成吡咯,1,4-二酮和呋喃。