Reactions of ninhydrin with activated anilines: Formation of indole derivatives
作者:David St.C. Black、Michael C. Bowyer、Glenn C. Condie、Donald C. Craig、Naresh Kumar
DOI:10.1016/s0040-4020(01)85709-4
日期:1994.1
In benzene, ninhydrin undergoes electrophilicsubstitution at C2 of 3,5-dimethoxyaniline, leading to the indeno[1,2-b]indole (7), which can in turn be transformed into the fused indolederivatives (9), (17) and (19), the indolenines (15) and (16), the indolone (18), and the dihydroindole (8). The corresponding reaction in water undergoes electrophilicsubstitution at C4 to give compound (11)
Synthesis of tetrahydroindeno[1,2-b]indol-10-ones and their rearrangement to [2]benzopyrano[4,3-b]indol-5-ones
作者:James L. Bullington、John H. Dodd
DOI:10.1021/jo00070a017
日期:1993.8
The formation of tetrahydroindeno[1,2-b]indol-10-ones 1 by reaction of ninhydrin with substituted anilines is described. The tetrahydroindeno[1,2-b]indol-10-ones 1 rearrange to form 5,11-dihydro[2]benzopyran[4,3-b]indol-5-ones 8 when heated under acid conditions. Reaction of ninhydrin with 3-hydroxyaniline gave a benzo[b]indeno[2,1-d]furan 4.