Facile synthesis of cyclic polyphenylenes by consecutive inter- and intramolecular cycloadditions of ortho -, meta -, and para -phenylene-tethered triynes

Takanori Shibata, Masako Fujimoto, Hiroyuki Hirashima, Tatsuya Chiba, Kohei Endo

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Consecutive inter- and intramolecular [2+2+2] cycloadditions of various phenylene-tethered triynes were comprehensively studied by using chiral rhodium catalysts. ortho-Phenylene-tethered triynes gave chiral o,o,o,o-tetraphenylenes in high-to-excellent enantiomeric excess as dimers. meta-Phenylene-tethered triynes gave chiral o,m,o,m-tetraphenylenes in moderate enantiomeric excess as dimers along with hexaphenylenes as trimers. This is the first synthesis of cis-o,m,o,m-tetraphenylenes; one structure was ascertained by X-ray crystal structure analysis. para-Phenylene-tethered triynes gave o,p,o,p,o,p- hexaphenylenes as trimers along with the formation of o,p,o,p,o,p,o,p- octaphenylenes as tetramers. 1 Introduction 2 Results and Discussion 2.1 ortho-Phenylene-Tethered Triynes 2.2 Naphthylene-Tethered Triynes 2.3 meta-Phenylene-Tethered Triynes 2.4 para-Phenylene-Tethered Triynes 3 Conclusion.

Original languageEnglish
Article numberSS-2012-Z0614-FA
Pages (from-to)3269-3284
Number of pages16
JournalSynthesis (Germany)
Volume44
Issue number21
DOIs
Publication statusPublished - 2012 Oct 10

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Keywords

  • asymmetric synthesis
  • axial chirality
  • chiral catalysts
  • cycloaddition
  • polyphenylenes
  • rhodium

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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