Abstract
It was found by x-ray diffraction analysis that in the fulvenes studied, the aromatic rings of the condensed tricyclic fragment are not in the same plane. The angle between them is approximately 4°. The exocyclic carbon atom is at the same angle relative to the plane of the five-membered ring. Starting from 9-(4-pyridylmethylidene)fluorene, there were obtained 3-(4-pyridyl)spirooxirane[2,9′]fluorene and 1,2,3,4-trimethoxycarbonyl-8-(fluorylidene-9-methylene)-9a-H-quinolizine.
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Additional information
Russian University of Peoples' Friendship, Moscow 117923. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 962–966, July, 1998.
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Kolyadina, N.M., Soldatenkov, A.T., Gridunova, G.V. et al. Structure of 9-(4-pyridylmethylene)fluorene and 9-(E)-benzylidene-1-azafluorene. Oxidation of 9-(4-pyridylmethylene)fluorene and its condensation with acetylenedicarboxylic acid diester. Chem Heterocycl Compd 34, 833–836 (1998). https://doi.org/10.1007/BF02251692
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DOI: https://doi.org/10.1007/BF02251692