Heterocyclische Siebenring-Verbindungen, XXIX [1] Bildung und Abfangreaktionen von substituierten 2,3-Dehydro- 1,5-benzodioxepinen / Heterocyclic Seven-Membered Ring Compounds, XXIX [1] Formation and Trapping Reactions of Substituted 2,3-Dehydro-1,5-benzodioxepins
1985 ◽
Vol 40
(11)
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pp. 1575-1579
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4-Cyano- and 4-Carbomethoxy-3,4-dihydro-2H-l,5-benzodioxepin-3-one (1a and 1b) have been converted to the corresponding enol-toluenesulfonates 2a and 2b, respectively. Reaction of 2a and 2b with base led to the heterocyclic allenes 3a resp. 3b, which could be trapped by Diels-Alder-reaction with furane, yielding the cycloadducts 4a and 4b.
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2002 ◽
Vol 124
(7)
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pp. 1158-1159
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1985 ◽
pp. 145-147
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