The Vinylogous Reactivity of Oxindoles Bearing Non-symmetric 3-Alkylidene Groups
Vinylogy, as defined by Fuson, is the possibility to propagate the properties of a functional group through a conjugated unsaturation (vinyl). Under a synthetic point of view, this phenomenon gives access to new transformations that, as a drawback, are more difficult to achieve because the reagent is usually less reactive and the stereochemistry of the product is harder to control as a consequence of the activated functional group being more distant from where the reaction actually takes place.
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