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Diels-Alder Reaction
No.102(April 1999)

The present reagent 1 is a highly reactive dienone and reacts rapidly with various dienophiles to give the cyclic adducts. This reaction proceeds stereoselectively. For example, the reaction with p-substituted styrene produces preferentially an endo-oriented adduct. In the reaction with an electrone deficient, such as maleic anhydride, only an endo-oriented adduct is produced. Since the present dienone is colored intense orange while the adduct is faded, the progress of reaction can be monitored by observation of the color change.
References
- Cycloaddition reaction of cyclopentadienones
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