Nucleophilic substitution reactions of trans-4-(para-substituted phenoxy)-3-buten-2-ones

Reactions of trans-4-(para-substituted phenoxy)-3-buten-2 ones (1-6) with primary amines to give 4-alkylamino-3-buten-2-ones in water are characterized by (1) rates which are first order in amine and 1-6, (2) a Hammett type rho* = 0.11 for reactions of 1-6 with aminoethanol, (3) ..beta../sub nuc/ =...

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