In solution at 20 °C the cyclopentadienone (1) is in equilibrium with the normal endo-Diels–Alder dimer (2) and the formal [π2 +π2]-dimer (3) the structure of the diol–diacetate of which has been determined by X-ray crystallography; on heating at 80 °C this mixture affords the exo-Diels–Alder dimer (4).
D. W. Jones and W. S. McDonald, J. Chem. Soc., Chem. Commun., 1980, 417 DOI: 10.1039/C39800000417
To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.
If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.
If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.
Read more about how to correctly acknowledge RSC content.
Please wait while we load your content...