Biased helical folding of chiral oligoindole foldamers

Veluru Ramesh Naidu, Min Cheol Kim, Jae Min Suk, Ho Joong Kim, Myongsoo Lee, Eunji Sim, Kyu Sung Jeong

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)


(Chemical Equation Presented) Oligoindole-based chiral foldamers have been synthesized by incorporating (S)- or (R)-1-phenylethylamine to both ends of the tetraindole scaffold. The oligoindoles fold into a helical conformation upon binding an anion by hydrogen bonds, which gives rise to an induced circular dichroism (CD) signal of large amplitude, implying the preferential formation of one helical isomer over another. Theoretical calculations suggest that the (P)-helix of the (S,S)-oligoindole 8a be more energetically stable than the corresponding (M)-helix.

Original languageEnglish
Pages (from-to)5373-5376
Number of pages4
JournalOrganic Letters
Issue number23
Publication statusPublished - 2008 Dec 4

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry


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