Abstract 2‐Hydroxy‐ and 2,15‐dihydroxyhexahelicene were synthesised from simple benzene and naphthalene building blocks by intramolecular CoI‐ or Ni0‐catalysed [2+2+2] cycloisomerisation of CH3O‐substituted aromatic triynes. This approach avoids vexing photodehydrocyclisation of stilbene‐type precursors, providing thus a useful alternative to classical procedures. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
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Teplý et al. (2007) studied this question.
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