Title:A New Way to the Synthesis of Tricyclic Compounds via Nitrone 1,3-
cycloaddition Dipolar Reaction
Volume: 20
Issue: 5
Author(s): Nadia Zga, Mounir Azouz*Djamel Bouchouk
Affiliation:
- Laboratory of Aquatic and Terrestrial Ecosystems, Organic and Bioorganic Chemistry Group, University of Mohamed-
Cherif Messaadia, Souk Ahras, 41000, Algeria
Keywords:
1, 3-dipolar cycloaddition intramolecular, nitrone, alkaloids, amino alcohol, tricyclic compounds, morphinans.
Abstract:
Objective: This study aimed at developing new methodologies for 1,3-dipolar cycloaddition.
Methods: A new series of tricyclic derivatives (13a-d) were synthesized via 1, 3-dipolar cycloaddition
of nitrones (8a-c) and (9a-c) using intramolecular cyclisation at the reflux of toluene and radical intramolecular
cyclisation in the presence of tributyltin hydride and AIBN as an initiator in benzene, which
are two techniques to prepare cycloadducts (11a-d), followed by cleavage of the N-O bond performed
using Sml in THF.
Results: The structures of these new tricyclic derivatives have been confirmed by Mass, 1H-NMR (1d,
2d), 13C-NMR, and IR spectral data.
Conclusion: In summary, we have investigated the possibility of synthesizing some new and straightforward
methods to access an A-C-D tricyclic skeleton of morphinans from symmetrical arylcyclohexadienes.