Intramolecular [2+2] Cycloadditons of Ketenes and Olefins
作者： Beat Ernst , Alain Mesmaeker , Hans Greuter , Siem J. Veenstra
DOI: 10.1007/978-94-009-0929-8_14
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摘要: The synthetic potential of the intramolecular ketene cycloaddition is presented. It proves to be a versatile method for synthesis variety bi- and tricyclic cyclobutanones. major side reaction, namely dimerization prevented by introduction conformational restrictions. This has been achieved an additional double bond or annulated ring system. Following this strategy C-analogues penem carbapenem as well linear angular triquinanes are obtained in high yield.
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