Ring Transformation of Oxiranes into other Heterocyclic Compounds

Ring Transformation of Oxiranes into other Heterocyclic Compounds 

The publications that appeared up to 1975 on the transformations of oxiranes into other heterocyclic compounds are reviewed in detail in the monograph by van der Plas and the relevant chapters of other reviews. Accordingly, we merely supplement the earlier data with more recently reported results and, at the same time, present some of the varied transformations of the oxiranes. The possibility of stereoselective synthesis of heterocyclic systems was broadened considerably by 1,3-dipolar cycloaddition reactions. Heterocycles are formed if the ylide intermediates produced from oxiranes in photolytically or thermally induced reactions are made to react intramolecularly or with external dipolarophiles. Reactions of these types will be treated in Sections IV.8 and IV.9. 

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S. Ring Transformation of Oxiranes into other Heterocyclic Compounds... 

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