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Synthesis 1987; 1987(2): 202-203
DOI: 10.1055/s-1987-27892
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Synthesis of 1,1′-Biindenes and 3,3′-Biindenes

Pierre Nicolet* , Jean-Yves Sanchez, Ahmed Benaboura, Marc J. M. Abadie
  • *Laboratoire de Chimie Macromoléculaire, Université des Sciences et de la Technologie Houari Boumediene, Dar El Beida, BP no. 9, Alger
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Publication Date:
12 September 2002 (online)

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1,1′-Biindenes 2, conveniently prepared from indenyllithiums by treatment with copper(II) chloride, are quantitatively isomerized to the corresponding 3,3′-biindenes 3 by heating in triethylamine/pyridine. Both d, l and meso isomers of 2 react to form 3, the rate of reaction of the meso form, however, is substantially faster.