Palladium-Promoted Transformation of β-Amino Ketones to Enaminones
作者:Shun-Ichi Murahashi、Yo Mitsue、Tatsuo Tsumiyama
DOI:10.1246/bcsj.60.3285
日期:1987.9
The reaction of β-amino ketones with bis(acetonitrile)dichloropalladium(II) in the presence of triethylamine gives the corresponding enaminones regioselectively. The cyclic β-amino ketones can be converted into the corresponding exocyclic enaminones. The enaminones thus obtained are versatile synthetic intermediates. The reaction of (E)-enaminones with organocuprates gave the corresponding (E)-α,β-unsaturated ketones.
作者:Andriy I. Frolov、Eugeniy N. Ostapchuk、Alexander E. Pashenko、Yaroslav O. Chuchvera、Eduard B. Rusanov、Dmitriy M. Volochnyuk、Sergey V. Ryabukhin
DOI:10.1021/acs.joc.1c00148
日期:2021.6.4
The convenient and scalable preparative approach for the two-step α-methylation of ketones is described. The optimized protocols for regioselective preparation of enaminones with further diastereoselective and functional groups tolerant hydrogenation to α-methylketones are developed. The scope and limitations of the proposed methodology are discussed. The advantages compared to known procedures are
描述了用于酮的两步 α-甲基化的方便且可扩展的制备方法。开发了区域选择性制备烯胺酮的优化方案,具有进一步的非对映选择性和官能团耐受氢化成 α-甲基酮。讨论了所提议方法的范围和局限性。证明了与已知程序相比的优点。暗示了丙酮在氢化中的意想不到的作用。显示了对早期构建块合成和后期 CH 功能化方法的评估。复杂程序的可制备性和可扩展性通过合成高达 100 g 的几种 α-甲基酮来证明。