New potential DNA intercalators of the carbazole series from indole-2,3-quinodimethanes: Synthesis, crystal structure, and molecular modeling with a watson-crick mini-helix
作者:M. Dr�ger、M. Haber、H. Erfanian-Abdoust、U. Pindur、Kristin Sattler
DOI:10.1007/bf00819524
日期:1993.5
1-Alkylpyrano[3,4-b]indol-3-ones 3 react via a Diels-Alder step with an aryne or N-phenylmaleimide to furnish the new [b]annellated carbazoles 4-10 in a one-pot process. In an analogous procedure, the in situ generated N-benzoylindole-2,3-quinodimethane (13) reacted with quinones to furnish the dioxocarbazoles 14-16. Compounds 4 8 and 14-16 with a coplanar skeleton are members of a class of potential DNA intercalators, as has been shown for 5 and 8 by X-ray structural analysis. On the basis of the geometries determined by X-ray crystallography, the intercalative binding of these molecules with a Watson-Crick mini-helix was predicted by molecular modeling methods,