A concise synthesis of β-lactam–sulfonamide hybrids
作者:Dirk Freitag、Pia Schwab、Peter Metz
DOI:10.1016/j.tetlet.2004.03.055
日期:2004.4
Using ring closing metathesis (RCM) as the key operation, a rapid access to beta-lactams fused to a sultam moiety of variable ring size was developed from low cost, commercially available starting materials. An efficient RCM of 4-vinyl-azetidin-2ones to give I-aza-bicyclo[4.2.0]oct-4-en-8-ones is also reported. (C) 2004 Elsevier Ltd. All rights reserved.
Ring Closing Metathesis in the Synthesis of Sultones and Sultams
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 throughRCM has been discovered, and a rapid access to p-lactams fused to a sultam moiety of variable ring size was developed from inexpensive, commercially available starting materials using RCM as the key operation