Indolopyridines with a bridging heteroatom. 9. Synthesis, structure, and thermolysis of 5-hydroxy-5-(2-pyridyl)-fluorene and 4-azafluorene

AT Soldatenkov, NM Kolyadina, LN Kuleshova…

Index: Soldatenkov; Kolyadina; Kuleshova; Khrustalev Chemistry of Heterocyclic Compounds, 1996 , vol. 32, # 7 p. 817 - 821

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Citation Number: 4

Abstract

Abstract Treatment of fluorenone or 4-azafluoren-9-one with 2-pyridyllithium gives 45- hydroxy-5-(2-pyridyl) fluorene and its aza analog. The structure of the former has been studied by x-ray crystallography. It was found that, in contrast to the non-condensed diaryl-2- pyridylcarbinols, these alcohols do not undergo acid catalyzed dehydration and heterocyclization. Under pyrolytic conditions. 5-pyridylfluorenol undergoes fission to form ...