Heterocyclic Compounds
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ChemInform Abstract: Novel Heterocyclic Outer-Ring Dienes: N-Alkyl- and N-Aryl-Substituted 4,5-Dimethylene-2-oxazolidinones.
First published: March 29, 1994
Abstract
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ChemInform Abstract
The isocyanates (I) react with biacetyl (II) to give the dimethyleneoxazolidinones (III). These, e.g. (IIIa), undergo Diels- Alder cycloaddition reaction with N-phenylmaleimide (IV) to yield the corresponding adducts, e.g. (V). In the absence of dienophiles, four different dimers (VI) - (IX) and the cyclobutene (X) are obtained upon heating of (IIIa).
