Journal of the American Chemical Society p. 1797 - 1798 (1981)
Update date:2022-08-16
Topics:
Gavina, F.
Costero, A. M.
Gil, P.
Palazon, B.
Luis, S. V.
Evidence showing that the existence of free cyclopentadienone is needed in reactions of 4-tosyl-2-cyclopenten-1-one is presented.The methods involve the "Three-Phase Test" to detect reactive intermediates in solution.Cyclopentadienone is generated from an insoluble polymer-bound precursor and trapped by a second solid phase using Diels-Alder reactions.In such additions, the elusive ketone can act either as a diene or as a dienophile, according to reaction conditions.
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