Intramolecular [4+2] cycloaddition reactions of indolylalkylpyridazines: synthesis of annulated carbazoles
作者:Norbert Haider、Johann Käferböck
DOI:10.1016/j.tet.2004.06.008
日期:2004.7
Mono- and bicyclic 1,2-diazines tethered to indole dienophiles by alkylene chains were found to undergo thermally induced intramolecular Diels–Alder reactions with inverse electron demand, affording tetra- and pentacyclic condensed carbazoles.