Selective [3+2] Cycloadditions of β-Amino-α,β-unsaturated Pentacarbonylcarbenechromium Complexes to Alkynes-A New Approach to Functionally Substituted Cyclopentadienes

Bernard L. Flynn, Frank J. Funke, Claudio C. Silveira, Armin De Meijere

Research output: Contribution to journalArticleResearchpeer-review

37 Citations (Scopus)

Abstract

(3-Amino-1-ethoxyalkenylidene)pentacarbonylchromium complexes 2 react with alkynes in pyridine or acetonitrile to give highly substituted 5-amino-3-ethoxycyclopentadienes 3 as formal [3+2]-cycloadducts selectively in high yields rather than the usually favored [2+2+1]-cycloadducts, 5-methylene-2-cyclopenten-1-ones.

Original languageEnglish
Pages (from-to)1007-1010
Number of pages4
JournalSynlett
Volume1995
Issue number10
DOIs
Publication statusPublished - 1 Oct 1995
Externally publishedYes

Keywords

  • 1-Metalla-1,3,5-hexatrienes
  • cyclization
  • Cyclopentadienes
  • Cyclopentenones
  • highly substituted
  • protected

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