Reductive cyclization of N-iodoalkyl cyclic imides to nitrogen-fused polycyclic amides induced by samarium diiodide
作者:Deok-Chan Ha、Chang-Soo Yun、Eunsun Yu
DOI:10.1016/0040-4039(96)00374-7
日期:1996.4
SmI2-promoted cyclizations of cyclicimides having 3-iodopropyl or 4-iodobutyl groups on the imide nitrogen have been studied for construction of nitrogen-fusedpolycyclicamides.
Development of a Modified Julia Olefination of Imides for the Synthesis of Alkaloids
作者:Huu Vinh Trinh、Lionel Perrin、Peter G. Goekjian、David Gueyrard
DOI:10.1002/ejoc.201600349
日期:2016.6
We report the development of the intramolecular Juliaolefination of imides. This original reaction produces N-fused bicyclic enamide compounds, which are interesting precursors in the synthesis of alkaloids. We show that this transformation enables access to [5,6], [6,5], and [6,6] fused bicyclic lactam enamides. The scope and the limitations of the reaction are presented as well as computational
我们报告了酰亚胺的分子内 Julia 烯化的发展。这种原始反应产生 N-稠合双环烯酰胺化合物,它们是生物碱合成中有趣的前体。我们表明,这种转化能够获得 [5,6]、[6,5] 和 [6,6] 稠合双环内酰胺烯酰胺。介绍了反应的范围和局限性,以及有关标题反应新机理方面的计算研究。
Decarbonylation of α-tertiary amino acids application to the synthesis of polyhydroxylated indolizidines from D,L-pipecolic acid
作者:María J. Martín-López、Rosa Rodriguez、Francisco Bermejo
DOI:10.1016/s0040-4020(98)00689-9
日期:1998.9
The decarbonylation of the bicyclic α-tertiary carboxamido acid 11 led to the enamide 12, easily transformed into the indolizidine alkaloid 8,8a-trans-8-hydroxy-indolizidine 14. Likewise, the same process applied to the α-substituted pipecolic acid derivative 5 led to the unsaturated ester 6 which was easily transformed either into δ-coniceine 9 or to 14. The thermal fragmentation of the acyl derivative