Versatile Synthesis of 2-(Substituted phenyl)-6,7-dihydro-1H-indol-4(5H)-ones from Morita-Baylis-Hillman Acetates of 2-Oxo-2-(substituted phenyl)acetaldehyde
作者:Harikrishna Batchu、Sanjay Batra
DOI:10.1002/ejoc.201200107
日期:2012.5
A versatilesynthesis of 2-(substitutedphenyl)-6,7-dihydro-1H-indol-4(5H)-onesfrom adducts of the Morita–Baylis–Hillman reaction between 2-oxo-2-(substitutedphenyl)acetaldehydes and cyclohex-2-enone under mild conditions is described.
An Efficient Route to Highly Substituted Indoles via Tetrahydroindol-4(5<i>H</i>)-one Intermediates Produced by Ring-Opening Cyclization of Spirocyclopropanes with Amines
An efficient route to highly substituted indoles was developed. It included regioselective functionalization of tetrahydroindol‐4(5H)‐ones, prepared by ring‐opening cyclization of cyclohexane‐1,3‐dione‐2‐spirocyclopropanes with primary amines, and subsequent oxidation. The 6‐substituted indoles were synthesized from a readily available 5‐substituted cyclohexane‐1,3‐dione‐2‐spirocyclopropane. The synthesis