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For questions concerning all aspects of pericyclic reactions, their use in synthesis, and the orbital analyses used to describe them.
1
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Cis Orientation of dienophiles orientation of groups maintained in Diels Alder
To answer you question, imagine (or: build a molecular model) that the newly formed six-membered ring may be simplified as a flat disk. Then
either you start with a (trans)-configurated diene, as i …
11
votes
Accepted
Why is it the middle ring of anthracene which reacts in a Diels–Alder?
To provide a reason for the observed regioselectivity, it is helpful to draw anthracene's aromatic π-electron system in alternance of single and double bonds. In this instance, it is more beneficial …