Abstract
(2-Cyclopropylideneethyl) acetimidates underwent thermally induced or palladium (II) catalyzed aza-Claisen rearrangement into 1-ethenylcyclopropyl acetamides, providing convenient precursors to 1-amino cyclopropanecarboxylic acids (ACCs). Due to the regioselectivity of the nucleophilic substitution of the π 1,1-dimethylene allyl palladium complexes by soft nucleophiles, the palladium (0) catalysis was apparently non effective.
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