Synthesis 2004(10): 1696-1712  
DOI: 10.1055/s-2004-822408
FEATUREARTICLE
© Georg Thieme Verlag Stuttgart · New York

Ring Closing Metathesis in the Synthesis of Sultones and Sultams

Sandra Karsch, Dirk Freitag, Pia Schwab, Peter Metz*
Institut für Organische Chemie, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany
Fax: +49(351)46333162; e-Mail: peter.metz@chemie.tu-dresden.de;
Further Information

Publication History

Received 15 March 2004
Publication Date:
16 June 2004 (online)

Abstract

Unsaturated sultones with normal, medium and large ring sizes were efficiently synthesized by ring closing metathesis (RCM) of sulfonates. The resulting α,β-unsaturated sultones act as dienophiles in intermolecular Diels-Alder reactions. A first cyclic sulfate formation through RCM has been discovered, and a rapid access to β-lactams fused to a sultam moiety of variable ring size was developed from inexpensive, commercially available starting materials using RCM as the key operation. An efficient RCM of 4-vinyl-azetidin-2-ones to give 1-aza-bicyclo[4.2.0]oct-4-en-8-ones is also described.

1

X-Ray diffraction analysis.

29

Crystallographic data (excluding structure factors) for the structure 11 reported in this paper have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication no. CCDC-226916. Copies of the data can be obtained free of charge on application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK (fax:+44 (1223)336033; email: deposit@ccdc.cam.ac.uk).