Synthesis and Selected Reactions of a Bicyclic Sultam Having Sulfur at the Apex Position
作者:Adam J. Preston、Judith C. Gallucci、Leo A. Paquette
DOI:10.1021/jo0611162
日期:2006.8.1
the endo-oriented cyclobutene derivative 30. The title diene is not a ready participant in Diels−Alder reactions. When heated with endo-bornyltriazolinedione in ethyl acetate solution, conversion to a 1:1 mixture of 33 and its diastereomer occurred as confirmed by X-ray crystallographic analysis. From the mechanistic perspective, this transformation constitutes an interesting example of a stereocontrolled