Synthesis of 2,6-bis(1<i>H</i>-indole-6-yl)-4<i>H</i>-pyran-4-ones<i>via</i>Leimgruber-Batcho indole synthesis
作者:Aziz Shahrisa、Zarrin Ghasemi、Mahnaz Saraei
DOI:10.1002/jhet.80
日期:2009.3
2,6-Bis(1H-indole-6-yl)-4H-pyran-4-one was synthesized via Leimgruber–Batcho methodology starting from 2,6-bis(4-methyl-3-nitrophenyl)-4H-pyran-4-one . Enamine intermediate in this reaction, , reacts with aroyl chlorides in the presence of 1,4-diazabicyclo[2.2.2]octane in dioxane to give the substituted enamines . Enamines undergo reductive cyclization with Fe/AcOH to the corresponding 3-aroylindoles