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Synthesis 1991; 1991(3): 181-188
DOI: 10.1055/s-1991-26413
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1,7-Electrocyclic Reactions of α,β,γ,δ-Unsaturated 1,3-Dipoles as a Synthetic Route to Seven-Membered Heterocycles

Gaetano Zecchi*
  • *Dipartimento di Chimica Organica e Industriale, Università di Milano, Via Golgi 19, I-20133 Milano, Italy
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Publikationsdatum:
17. September 2002 (online)

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Various seven-membered heterocyclic compounds (monocyclic and annulated) are accessible by means of a general synthetic tool, i. e. 1,7-electrocyclic ring closure of 1,3-dipoles that are α,β, and γ,δ-unsaturated. 1. Introduction 2. Diazoalkenes 3. Nitrile Imines 4. Nitrile Ylides 5. Carbonyl Ylides 6. Other 1,3-Dipoles 7. Concluding Remarks