Highly efficient regio- and stereoselective dimerization of (hetero)aromatic terminal alkynes by organo rare-earth metal catalysts

Shaozhong Ge, Victor F. Quiroga Norambuena, Bart Hessen*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

41 Citations (Scopus)
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Abstract

The yttrium dialkyl complex [(L)Y(CH2SiMe3)(2)] (1, L = 1, 4, 6-trimethyl-N-(2-pyrrolidin-1-ylethyl)-1, 4-diazepan-6-amine), activated by (PhNMe2H)(B(C6F5)(4)), catalytically dimerizes a range of (hetero)aromatic alkynes to Z-enynes with 100% selectivity and high rates. Catalyst turnovers up to 2000 were readily achieved in preparative scale (5-10 mmol) reactions. For comparison, the related E-enynes were produced with a permethyl lanthanocene catalyst.

Original languageEnglish
Pages (from-to)6508-6510
Number of pages3
JournalOrganometallics
Volume26
Issue number26
DOIs
Publication statusPublished - 17-Dec-2007

Keywords

  • CHIRAL LANTHANIDE COMPLEXES
  • TO-HEAD DIMERIZATION
  • ASYMMETRIC CATALYSIS
  • ISO-POLYDIACETYLENES
  • HYDRIDE COMPLEXES
  • SYNTHETIC METHOD
  • CHEMISTRY
  • LIGAND
  • ENYNES
  • OLIGOMERIZATION

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