Synthesis of Ethynylhelicene Oligomers

  • Nozomi Saito
Part of the Springer Theses book series (Springer Theses)


Side chain analogues of ethynylhelicene oligomers were synthesized by a two-directional method to elongate the oligomers in two directions by a repetitive Sonogashira coupling reaction with building blocks and deprotection [1, 2].


Building Block Lower Solubility Coupling Reaction High Solubility Subsequent Reduction 
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  1. 1.
    Nakamura K, Okubo H, Yamaguchi M (2001) Synthesis and self-aggregation of cyclic alkynes containing helicene. Org Lett 3:1097CrossRefGoogle Scholar
  2. 2.
    Sugiura H, Nigorikawa Y, Saiki Y, Nakamura K, Yamaguchi M (2004) Marked effect of aromatic solvent on unfolding rate of helical ethynylhelicene oligomer. J Am Chem Soc 126:14858CrossRefGoogle Scholar

Copyright information

© Springer Japan 2013

Authors and Affiliations

  1. 1.Tohoku UniversitySendaiJapan

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