Molecular-iodine catalyzed selective construction of cyclopenta[<i>b</i>]indoles from indoles and acetone: a green gateway to indole-fused cycles
作者:Prantika Bhattacharjee、Bipul Sarma、Utpal Bora
DOI:10.1039/d3ob01561k
日期:——
Molecular-iodine catalyzed access to an important class of bio-relevant indole derivatives, cyclopenta[b]indoles, has been achieved via a cascade addition/intramolecular cyclization reaction of indoles and acetone. Explorations of diverse substitution patterns revealed an essential substrate-control in the reaction. The high-density electronic core of indole is pivotal in favouring the formation of
通过吲哚和丙酮的级联加成/分子内环化反应,分子碘催化获得一类重要的生物相关吲哚衍生物——环戊[ b ]吲哚。对不同取代模式的探索揭示了反应中重要的底物控制。吲哚的高密度电子核心对于吲哚基-环戊[ b ]吲哚衍生物的形成至关重要;相反,核心的电子缺乏阻碍了环化过程,从而引导双(吲哚基)丙烷的形成。对机理途径的研究表明,双(吲哚基)烷烃是加成环化过程的中间体。这种简单的实验方法提供了环戊环吲哚的可持续合成途径。
BERGMAN, JAN;NORRBY, PER-OLA;TILSTAM, ULF;VENEMALM, LENNART, TETRAHEDRON, 45,(1989) N7, C. 5549-5564
作者:BERGMAN, JAN、NORRBY, PER-OLA、TILSTAM, ULF、VENEMALM, LENNART