Synthesis of new cycloalkenyliden-pyrroles by domino reaction
作者:Orazio A. Attanasi、Stefano Berretta、Lucia De Crescentini、Gianfranco Favi、Amalija Golobič、Fabio Mantellini
DOI:10.1016/j.tet.2009.01.040
日期:2009.3
Easily accessible cycloalkenyl-1-diazenes and β-dicarbonylcompounds are converted in one-pot into previously unknown functionalized fused cycloalkenyliden-pyrroles of different sizes. The domino reaction proceeds through a base-catalyzed conjugate addition/cyclization/elimination sequence.
Divergent base-induced reactivity of cycloalkenyl-1-diazenes
作者:Orazio A. Attanasi、Stefano Berretta、Lucia De Crescentini、Gianfranco Favi、Paolino Filippone、Gianluca Giorgi、Fabio Mantellini
DOI:10.1016/j.tet.2010.06.061
日期:2010.8
The different base-promoted regioselectivities of the ring closure processes in the reactions between cycloalkenyl-1-diazenes and beta-ketoesters are investigated. Under the appropriate conditions it is possible to turn the synthesis towards cycloalkenyliden-pyrroles or functionalized 3-hydroxy-hydrocinnolines. The aromatization procedure of the heteroring counterpart of the 3-hydroxy-hydrocinnolines is also reported. (C) 2010 Elsevier Ltd. All rights reserved.