U. Pindur et al., [4-DERIVATIVES WITH BISMALEIMIDES - A ROUTE TO NEW BISCARBAZOLES(2]CYCLOADDITION OF INDOLE), Journal of the Chemical Society. Perkin transactions. I, (12), 1997, pp. 1861-1867
New results for the reaction of in situ generated N-acylindole-2,3-qui
nodimethanes and donor-/acceptor-substituted 3-vinylindoles with some
bismaleimides are described. By a [4 + 2]cycloaddition process, a vari
ety of biscarbazoles are formed endo-selectively. These conformational
ly flexible molecules constitute a new class of compounds believed to
have potential as DNA minor groove binding ligands.