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Synlett 1991; 1991(5): 353-355
DOI: 10.1055/s-1991-34726
DOI: 10.1055/s-1991-34726
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© Georg Thieme Verlag, Rüdigerstr. 14, 70469 Stuttgart, Germany. All rights reserved. This journal, including all individual contributions and illustrations published therein, is legally protected by copyright for the duration of the copyright period. Any use, exploitation or commercialization outside the narrow limits set by copyright legislation, without the publisher's consent, is illegal and liable to criminal prosecution. This applies in particular to photostat reproduction, copying, cyclostyling, mimeographing or duplication of any kind, translating, preparation of microfilms, and electronic data processing and storage.
The Effect of Lewis Acids on the Intramolecular Diels-Alder Reaction of the Furan Diene
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Publikationsverlauf
Publikationsdatum:
07. März 2002 (online)
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Lewis acids have been found to accelerate the intramolecular Diels-Alder reaction of the furan diene in which the diene and dienophile are connected by four-carbon atoms [2-(4-oxo-5-alkenyl)furans]. The methodology has been extended to include acetylenic dienophiles [2-(1,1-dimethyl-4-oxo-5-alkynyl)furans], which cyclize to give the oxatricyclo ring system (5,6,7,8-tetrahydro-5,5-dimethyl-8-oxo-2H-2,4a-epoxynaphthalene).