Partially Saturated Indeno[1,2-<i>b</i>]indole Derivatives via Deoxygenation
of Heterocyclic α-Hydroxy-<i>N</i>,<i>O</i>-hemiaminals
作者:Hans-Jörg Hemmerling、Guido Reiss
DOI:10.1055/s-0028-1087983
日期:——
A series of 3-aminocyclohex-2-enones were reacted with indane-1,2,3-trione monohydrate (ninhydrin) yielding 4b,9b-dihydroxyindeno[1,2-b]indoles that were deoxygenated to indeno[1,2-b]indoles.
Lactic acid-catalyzed fusion of ninhydrin and enamines for the solvent-free synthesis of hexahydroindeno[1,2-<i>b</i>]indole-9,10-diones
作者:Xuwen Chen、Yunyun Liu
DOI:10.1515/hc-2016-0048
日期:2016.6.1
Abstract
The lactic acid-catalyzed reactions of ninhydrin and secondary enaminones were conducted by solvent-free grinding at room temperature to yield polycyclic 4b,9b-dihydroxy-4b,5,6,7,8,9b-hexahydroindeno[1,2-b]indole-9,10-diones.